| Message ID | 1412936381-22718-2-git-send-email-caesar.wang@rock-chips.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hi Caesar, On Fri, Oct 10, 2014 at 06:19:37PM +0800, Caesar Wang wrote: > Thermal is TS-ADC Controller module supports > user-defined mode and automatic mode. > > User-defined mode refers,TSADC all the control signals entirely by > software writing to register for direct control. > > Automaic mode refers to the module automatically poll TSADC output, > and the results were checked.If you find that the temperature High > in a period of time,an interrupt is generated to the processor > down-measures taken;If the temperature over a period of time High, > the resulting TSHUT gave CRU module,let it reset the entire chip, > or via GPIO give PMIC. > > Signed-off-by: zhaoyifeng <zyf@rock-chips.com> > Signed-off-by: Caesar Wang <caesar.wang@rock-chips.com> > --- > drivers/thermal/Kconfig | 9 + > drivers/thermal/Makefile | 1 + > drivers/thermal/rockchip_thermal.c | 628 +++++++++++++++++++++++++++++++++++++ > 3 files changed, 638 insertions(+) > create mode 100644 drivers/thermal/rockchip_thermal.c > > diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig > index f9a1386..24845ae 100644 > --- a/drivers/thermal/Kconfig > +++ b/drivers/thermal/Kconfig > @@ -133,6 +133,15 @@ config SPEAR_THERMAL > Enable this to plug the SPEAr thermal sensor driver into the Linux > thermal framework. > > +config ROCKCHIP_THERMAL > + tristate "Rockchip thermal driver" > + depends on ARCH_ROCKCHIP > + help > + Rockchip thermal driver provides support for Temperature sensor > + ADC (TS-ADC) found on Rockchip SoCs. It supports one critical > + trip point. Cpufreq is used as the cooling device and will throttle > + CPUs when the Temperature crosses the passive trip point. > + > config RCAR_THERMAL > tristate "Renesas R-Car thermal driver" > depends on ARCH_SHMOBILE || COMPILE_TEST > diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile > index de0636a..930554f 100644 > --- a/drivers/thermal/Makefile > +++ b/drivers/thermal/Makefile > @@ -19,6 +19,7 @@ thermal_sys-$(CONFIG_CPU_THERMAL) += cpu_cooling.o > > # platform thermal drivers > obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o > +obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o > obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o > obj-$(CONFIG_KIRKWOOD_THERMAL) += kirkwood_thermal.o > obj-y += samsung/ > diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c > new file mode 100644 > index 0000000..ceee2c1 > --- /dev/null > +++ b/drivers/thermal/rockchip_thermal.c > @@ -0,0 +1,628 @@ > +/* > + * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd > + * > + * This program is free software; you can redistribute it and/or modify it > + * under the terms and conditions of the GNU General Public License, > + * version 2, as published by the Free Software Foundation. > + * > + * This program is distributed in the hope it will be useful, but WITHOUT > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for > + * more details. > + */ > + > +#include <linux/clk.h> > +#include <linux/cpu_cooling.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_address.h> > +#include <linux/of_irq.h> > +#include <linux/platform_device.h> > +#include <linux/thermal.h> > + > +/** > +* If the temperature over a period of time High, > +* the resulting TSHUT gave CRU module,let it reset the entire chip, > +* or via GPIO give PMIC. > +*/ > +enum reset_mde { Can we spare one more letter? ;) > + CRU = 0, > + GPIO, > +}; > + > +/** > +* The system has three Teperture Sensors. > +* channel0 is reserve,channel1 is for CPU,and > +* channel channel 2 is for GPU. > +*/ > +enum sensor_id { > + RESERVE = 0, > + CPU, > + GPU, > + SENSOR_ID_END, > +}; > + > +struct rockchip_thermal_data { > + const struct rockchip_tsadc_platform_data *pdata; > + struct thermal_zone_device *tz[SENSOR_ID_END]; > + struct thermal_cooling_device *cdev; > + void __iomem *regs; > + > + unsigned long temp_passive; > + unsigned long hw_shut_temp; > + unsigned long alarm_temp; > + bool irq_enabled; > + int irq; > + int reset_mode; > + int chn; > + > + struct clk *clk; > + struct clk *pclk; > +}; > + > +struct rockchip_tsadc_platform_data { > + unsigned long temp_passive; > + unsigned long hw_shut_temp; > + int reset_mode; > + > + int (*irq_handle)(void __iomem *reg); Why does it return int and not void? What is the return value of this? > + int (*initialize)(int reset_mode, int chn, void __iomem *reg, Why does it return int and not void? What is the return value of this?> + unsigned long hw_shut_temp); > + int (*control)(void __iomem *reg, bool on); > + int (*code_to_temp)(u32 code); > + u32 (*temp_to_code)(int temp); > + void (*set_alarm_temp)(int chn, void __iomem *reg, > + unsigned long alarm_temp); > +}; > + > +/* TSADC V2 Sensor info define: */ > +#define TSADCV2_AUTO_CON 0x04 > +#define TSADCV2_INT_EN 0x08 > +#define TSADCV2_INT_PD 0x0c > +#define TSADCV2_DATA(chn) (0x20+chn*0x04) Unsafe macros. You want to enclose argument in parenthesis. > +#define TSADCV2_COMP_INT(chn) (0x30+chn*0x04) > +#define TSADCV2_COMP_SHUT(chn) (0x40+chn*0x04) > +#define TSADCV2_HIGHT_INT_DEBOUNCE 0x60 > +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64 > +#define TSADCV2_AUTO_PERIOD 0x68 > +#define TSADCV2_AUTO_PERIOD_HT 0x6c > + > +#define TSADCV2_AUTO_EN BIT(0) > +#define TSADCV2_AUTO_DISABLE ~BIT(0) > +#define TSADCV2_AUTO_SRC_EN(chn) (0xf << (4 + chn)) > +#define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8) > + > +#define TSADCV2_INT_SRC_EN(chn) BIT(chn) > +#define TSADCV2_SHUT_2GPIO_SRC_EN(chn) (0xf << (4 + chn)) > +#define TSADCV2_SHUT_2CRU_SRC_EN(chn) (0xf << (8 + chn)) > + > +#define TSADCV2_INT_PD_CLEAR ~BIT(8) > + > +#define TSADCV2_DATA_MASK 0xfff > +#define TSADCV2_HIGHT_INT_DEBOUNCE_TIME 0x0a > +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_TIME 0x0a > +#define TSADCV2_AUTO_PERIOD_TIME 0x03e8 > +#define TSADCV2_AUTO_PERIOD_HT_TIME 0x64 > + > +struct tsadc_table { > + unsigned long code; > + int temp; > +}; > + > +static const struct tsadc_table v2_code_table[] = { > + {TSADCV2_DATA_MASK, -40000}, > + {3800, -40000}, > + {3792, -35000}, > + {3783, -30000}, > + {3774, -25000}, > + {3765, -20000}, > + {3756, -15000}, > + {3747, -10000}, > + {3737, -5000}, > + {3728, 0}, > + {3718, 5000}, > + {3708, 10000}, > + {3698, 15000}, > + {3688, 20000}, > + {3678, 25000}, > + {3667, 30000}, > + {3656, 35000}, > + {3645, 40000}, > + {3634, 45000}, > + {3623, 50000}, > + {3611, 55000}, > + {3600, 60000}, > + {3588, 65000}, > + {3575, 70000}, > + {3563, 75000}, > + {3550, 80000}, > + {3537, 85000}, > + {3524, 90000}, > + {3510, 95000}, > + {3496, 100000}, > + {3482, 105000}, > + {3467, 110000}, > + {3452, 115000}, > + {3437, 120000}, > + {3421, 125000}, > + {0, 125000}, > +}; > + > +static int rk_tsadcv2_irq_handle(void __iomem *regs) > +{ > + u32 val; > + > + val = readl_relaxed(regs + TSADCV2_INT_PD); > + writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD); > + > + return 0; > +} > + > +static u32 rk_tsadcv2_temp_to_code(int temp) > +{ > + int high, low, mid, ret = 0; > + > + low = 0; > + high = ARRAY_SIZE(v2_code_table) - 1; > + mid = (high + low) / 2; > + > + if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) { > + ret = -ERANGE; The function returns u32, you can't return -ERANGE here. > + goto exit; > + } > + > + while (low <= high) { > + if (temp == v2_code_table[mid].temp) > + return v2_code_table[mid].code; > + else if (temp < v2_code_table[mid].temp) > + high = mid - 1; > + else > + low = mid + 1; > + mid = (low + high) / 2; > + } Hmm, you optimized temp_to_code but not code_to_temp, why? > + > + return 0; > + > +exit: > + return ret; > +} > + > +static int rk_tsadcv2_code_to_temp(u32 code) > +{ > + int i; > + > + for (i = 0; i < ARRAY_SIZE(v2_code_table) - 1; i++) { > + if (code >= v2_code_table[i].code) > + return v2_code_table[i].temp; > + } > + > + /* No code available,return max temperture */ > + return 125000; > +} > + > +static int rk_tsadcv2_initialize(int reset_mode, int chn, void __iomem *regs, > + unsigned long hw_shut_temp) > +{ > + u32 shutdown_value; > + > + shutdown_value = rk_tsadcv2_temp_to_code(hw_shut_temp); > + > + /* Enable measurements at ~ 10 Hz */ > + writel_relaxed(0 | TSADCV2_AUTO_TSHUT_POLARITY_HIGH, regs + > + TSADCV2_AUTO_CON); > + writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD); > + writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, regs + > + TSADCV2_AUTO_PERIOD_HT); > + writel_relaxed(shutdown_value, regs + TSADCV2_COMP_SHUT(chn)); > + writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_TIME, regs + > + TSADCV2_HIGHT_INT_DEBOUNCE); > + writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_TIME, regs + > + TSADCV2_HIGHT_TSHUT_DEBOUNCE); > + > + if (reset_mode == GPIO) > + writel_relaxed(TSADCV2_SHUT_2GPIO_SRC_EN(chn) | > + TSADCV2_INT_SRC_EN(chn), regs + > + TSADCV2_INT_EN); > + else > + writel_relaxed(TSADCV2_SHUT_2CRU_SRC_EN(chn) | > + TSADCV2_INT_SRC_EN(chn) , regs + > + TSADCV2_INT_EN); > + > + writel_relaxed(TSADCV2_AUTO_SRC_EN(chn) | TSADCV2_AUTO_EN, regs + > + TSADCV2_AUTO_CON); > + > + return 0; > +} > + > +static int rk_tsadcv2_control(void __iomem *regs, bool on) > +{ > + u32 val; > + > + if (on) { > + val = readl_relaxed(regs + TSADCV2_AUTO_CON); > + writel_relaxed(val | TSADCV2_AUTO_EN, regs + TSADCV2_AUTO_CON); > + } else { > + val = readl_relaxed(regs + TSADCV2_AUTO_CON); > + writel_relaxed(val & TSADCV2_AUTO_DISABLE, > + regs + TSADCV2_AUTO_CON); > + } > + > + return 0; > +} > + > +static void rk_tsadcv2_alarm_temp(int chn, void __iomem *regs, > + unsigned long alarm_temp) > +{ > + u32 alarm_value; > + > + alarm_value = rk_tsadcv2_temp_to_code(alarm_temp); > + > + writel_relaxed(alarm_value & TSADCV2_DATA_MASK, regs + > + TSADCV2_COMP_INT(chn)); > +} > + > +static const struct rockchip_tsadc_platform_data rk3288_tsadc_data = { > + .reset_mode = GPIO, /* default TSHUT via GPIO give PMIC */ > + .temp_passive = 80000, > + .hw_shut_temp = 120000, > + .irq_handle = rk_tsadcv2_irq_handle, > + .initialize = rk_tsadcv2_initialize, > + .control = rk_tsadcv2_control, > + .code_to_temp = rk_tsadcv2_code_to_temp, > + .temp_to_code = rk_tsadcv2_temp_to_code, > + .set_alarm_temp = rk_tsadcv2_alarm_temp, > +}; > + > +static const struct of_device_id of_rockchip_thermal_match[] = { > + { > + .compatible = "rockchip,rk3288-tsadc", > + .data = (void *)&rk3288_tsadc_data, > + }, > + { /* end */ }, > +}; > +MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); > + > +static void rockchip_set_alarm_temp(struct rockchip_thermal_data *data, > + int alarm_temp) > +{ > + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; > + > + data->alarm_temp = alarm_temp; > + if (tsadc->set_alarm_temp) > + tsadc->set_alarm_temp(data->chn, data->regs, alarm_temp); > +} > + > +static int rockchip_thermal_initialize(struct rockchip_thermal_data *data) > +{ > + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; > + > + if (data->chn == RESERVE) > + return 0; > + > + if (tsadc->initialize) > + tsadc->initialize(tsadc->reset_mode, data->chn, data->regs, > + data->hw_shut_temp); > + > + rockchip_set_alarm_temp(data, data->temp_passive); > + > + return 0; > +} > + > +static void rockchip_thermal_control(struct rockchip_thermal_data *data, > + bool on) > +{ > + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; > + > + if (tsadc->control) > + tsadc->control(data->regs, on); > + > + if (on) { > + data->irq_enabled = true; > + data->tz[data->chn]->ops->set_mode(data->tz[data->chn], > + THERMAL_DEVICE_ENABLED); > + } else { > + data->irq_enabled = false; > + data->tz[data->chn]->ops->set_mode(data->tz[data->chn], > + THERMAL_DEVICE_DISABLED); > + } > +} > + > +static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev) > +{ > + struct rockchip_thermal_data *data = dev; > + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; > + int chn; > + > + if (tsadc->irq_handle) > + tsadc->irq_handle(data->regs); > + > + for (chn = CPU; chn < SENSOR_ID_END; chn++) > + thermal_zone_device_update(data->tz[chn]); > + > + return IRQ_HANDLED; > +} > + > +static int rockchip_thermal_set_trips(void *zone, long low, long high) > +{ > + struct rockchip_thermal_data *data = zone; > + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; > + u32 val; > + > + low = clamp_val(low, LONG_MIN, LONG_MAX); > + high = clamp_val(high, LONG_MIN, LONG_MAX); > + > + /* channel0 is RESERVE, not need to set trips*/ > + if (data->chn == RESERVE) > + return 0; > + > + val = readl_relaxed(data->regs + TSADCV2_DATA(data->chn)); I do not think you need to re-read the temperature: you are already goivent lower and upper trip points for current temperature, you just need to set alarm to the upper one. > + if (val == 0) > + return -EPROBE_DEFER; What -EPROBE_DEFER means in this context? > + > + /* Update alarm value to next higher trip point */ > + if (data->alarm_temp == data->temp_passive && val <= > + tsadc->temp_to_code(data->temp_passive)) > + high = data->hw_shut_temp; > + > + if (data->alarm_temp >= data->temp_passive && val > > + tsadc->temp_to_code(data->temp_passive)) { > + high = data->temp_passive; > + } > + > + return 0; > +} > + > +static int rockchip_thermal_get_temp(void *zone, long *out_temp) > +{ > + struct rockchip_thermal_data *data = zone; > + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; > + u32 val; > + > + if (data->chn == RESERVE) > + return 0; > + > + val = readl_relaxed(data->regs + TSADCV2_DATA(data->chn)); > + > + if (val < tsadc->temp_to_code(data->hw_shut_temp)) > + *out_temp = 120000; Why is this needed? If this is really needed please comment the code. > + else > + *out_temp = tsadc->code_to_temp(val); > + > + return 0; > +} > + > +static int rockchip_configure_from_dt(struct device *dev, > + struct device_node *np, > + struct rockchip_thermal_data *data) > +{ > + int shut_temp, reset_mode; > + > + if (of_property_read_u32(np, "hw-shut-temp", &shut_temp)) { > + dev_warn(dev, "Missing default shutdown temp property\n"); > + data->hw_shut_temp = data->pdata->hw_shut_temp; I am still not sure why we want it in DT. I envision the set up as follows: passive trip point - defined in DT critical trip point - defined in DT, causes shutdown performed by thermal core for us hardware critical - hard coded (defined by the hardware, no point in changing), shuts down or resets the box automatically by the hardware, no kernel involved. > + } else { > + data->hw_shut_temp = shut_temp; > + } > + > + if (of_property_read_u32(np, "tsadc-ht-reset-mode", &reset_mode)) { > + dev_warn(dev, "Missing default reset mode property\n"); > + data->reset_mode = data->pdata->reset_mode; > + } else { > + data->reset_mode = reset_mode; > + } > + > + data->temp_passive = data->pdata->temp_passive; > + > + return 0; > +} > + > +static int rockchip_thermal_probe(struct platform_device *pdev) > +{ > + struct rockchip_thermal_data *data; > + const struct rockchip_tsadc_platform_data *tsadc; > + const struct of_device_id *match; > + > + struct cpumask clip_cpus; > + struct resource *res; > + struct device_node *np = pdev->dev.of_node; > + > + int ret, err, chn; > + > + data = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data), > + GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + data->regs = devm_ioremap_resource(&pdev->dev, res); > + if (IS_ERR(data->regs)) { > + dev_err(&pdev->dev, "Could not get tsadc source, %p\n", > + data->regs); > + return PTR_ERR(data->regs); > + } > + > + match = of_match_node(of_rockchip_thermal_match, np); > + if (!match) > + return -ENXIO; > + data->pdata = (const struct rockchip_tsadc_platform_data *)match->data; > + if (!data->pdata) > + return -EINVAL; > + tsadc = data->pdata; > + > + data->clk = devm_clk_get(&pdev->dev, "tsadc"); > + if (IS_ERR(data->clk)) { > + dev_err(&pdev->dev, "failed to get tsadc clock\n"); > + return PTR_ERR(data->clk); > + } > + > + data->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); > + if (IS_ERR(data->pclk)) { > + dev_err(&pdev->dev, "failed to get tsadc pclk\n"); > + return PTR_ERR(data->pclk); > + } > + > + /** > + * Use a default of 10KHz for the converter clock. > + * This may become user-configurable in the future. > + * Need to judge the data->clk is Divided by xin32k. > + * Need to retry it if the pmic hasn't output the xin32k. > + */ > + if (clk_get_rate(data->clk) == 0) > + return -EPROBE_DEFER; What would cause the clock to be present but report 0 rate? Are we sure that it will start reporting different data after binding some more drivers? > + ret = clk_set_rate(data->clk, 10000); > + if (ret < 0) { > + dev_err(&pdev->dev, "failed to set tsadc clk rate, %d\n", ret); > + return ret; > + } > + > + ret = clk_prepare_enable(data->clk); > + if (ret < 0) { > + dev_err(&pdev->dev, "failed to enable converter clock\n"); > + goto err_clk; > + } > + > + ret = clk_prepare_enable(data->pclk); > + if (ret < 0) { > + dev_err(&pdev->dev, "failed to enable pclk\n"); > + goto err_pclk; > + } > + > + cpumask_set_cpu(0, &clip_cpus); > + data->cdev = of_cpufreq_cooling_register(np, &clip_cpus); > + if (IS_ERR(data->cdev)) { > + dev_err(&pdev->dev, "failed to register cpufreq cooling device\n"); > + goto disable_clk; > + } > + > + data->irq = platform_get_irq(pdev, 0); > + if (data->irq < 0) { > + dev_err(&pdev->dev, "no irq resource?\n"); > + goto disable_clk; > + } > + > + ret = devm_request_threaded_irq(&pdev->dev, data->irq, NULL, > + &rockchip_thermal_alarm_irq_thread, > + IRQF_ONESHOT, "rockchip_thermal", > + data); > + if (ret < 0) { > + dev_err(&pdev->dev, > + "failed to request tsadc irq: %d\n", ret); > + goto disable_clk; > + } > + > + ret = rockchip_configure_from_dt(&pdev->dev, np, data); > + if (ret) > + dev_err(&pdev->dev, "Parsing device tree data error.\n"); > + > + /* The system three Teperture Sensors be registered */ > + for (chn = RESERVE; chn < SENSOR_ID_END; chn++) { > + data->chn = chn; > + > + data->tz[chn] = thermal_zone_of_sensor_register( > + &pdev->dev, data->chn, > + data, rockchip_thermal_get_temp, > + NULL, > + rockchip_thermal_set_trips); > + if (IS_ERR(data->tz[chn])) { > + err = PTR_ERR(data->tz[chn]); > + dev_err(&pdev->dev, "failed to register sensor: %d\n", > + err); > + chn--; > + goto unregister_tzs; > + } Do we have to have all zones defined? Why? > + > + platform_set_drvdata(pdev, data); > + > + rockchip_thermal_initialize(data); > + rockchip_thermal_control(data, true); > + } > + return 0; > + > +unregister_tzs: > + for (; chn >= RESERVE; chn--) > + thermal_zone_of_sensor_unregister(&pdev->dev, data->tz[chn]); > + cpufreq_cooling_unregister(data->cdev); > + > +disable_clk: > +err_pclk: > + clk_disable_unprepare(data->pclk); > +err_clk: > + clk_disable_unprepare(data->clk); > + > + return ret; > +} > + > +static int rockchip_thermal_remove(struct platform_device *pdev) > +{ > + struct rockchip_thermal_data *data = platform_get_drvdata(pdev); > + int chn; > + > + rockchip_thermal_control(data, false); > + > + for (; chn >= RESERVE; chn--) You are not initializing chn, it will blow up. > + thermal_zone_of_sensor_unregister(&pdev->dev, data->tz[chn]); > + cpufreq_cooling_unregister(data->cdev); > + > + clk_disable_unprepare(data->clk); > + clk_disable_unprepare(data->pclk); > + > + return 0; > +} > + > +#ifdef CONFIG_PM_SLEEP > +static int rockchip_thermal_suspend(struct device *dev) > +{ > + struct platform_device *pdev = to_platform_device(dev); > + struct rockchip_thermal_data *data = platform_get_drvdata(pdev); > + > + rockchip_thermal_control(data, false); > + > + clk_disable_unprepare(data->clk); > + clk_disable_unprepare(data->pclk); Why do we unpreparing in suspend instead of just disabling? > + > + return 0; > +} > + > +static int rockchip_thermal_resume(struct device *dev) > +{ > + struct platform_device *pdev = to_platform_device(dev); > + struct rockchip_thermal_data *data = platform_get_drvdata(pdev); > + int ret; > + > + ret = clk_prepare_enable(data->pclk); > + if (ret) > + return ret; > + > + ret = clk_prepare_enable(data->clk); > + if (ret) > + return ret; > + > + rockchip_thermal_initialize(data); > + rockchip_thermal_control(data, true); > + > + return 0; > +} > +#endif > + > +static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops, > + rockchip_thermal_suspend, rockchip_thermal_resume); > + > +static struct platform_driver rockchip_thermal_driver = { > + .driver = { > + .name = "rockchip-thermal", > + .owner = THIS_MODULE, > + .pm = &rockchip_thermal_pm_ops, > + .of_match_table = of_rockchip_thermal_match, > + }, > + .probe = rockchip_thermal_probe, > + .remove = rockchip_thermal_remove, > +}; > + > +module_platform_driver(rockchip_thermal_driver); > + > +MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver"); > +MODULE_AUTHOR("Rockchip, Inc."); > +MODULE_LICENSE("GPL v2"); > +MODULE_ALIAS("platform:rockchip-thermal"); > -- > 1.9.1 > > Thanks.
Dear Dmitry, ? 2014?10?11? 01:46, Dmitry Torokhov ??: > Hi Caesar, > > On Fri, Oct 10, 2014 at 06:19:37PM +0800, Caesar Wang wrote: >> Thermal is TS-ADC Controller module supports >> user-defined mode and automatic mode. >> >> User-defined mode refers,TSADC all the control signals entirely by >> software writing to register for direct control. >> >> Automaic mode refers to the module automatically poll TSADC output, >> and the results were checked.If you find that the temperature High >> in a period of time,an interrupt is generated to the processor >> down-measures taken;If the temperature over a period of time High, >> the resulting TSHUT gave CRU module,let it reset the entire chip, >> or via GPIO give PMIC. >> >> Signed-off-by: zhaoyifeng <zyf@rock-chips.com> >> Signed-off-by: Caesar Wang <caesar.wang@rock-chips.com> >> --- >> drivers/thermal/Kconfig | 9 + >> drivers/thermal/Makefile | 1 + >> drivers/thermal/rockchip_thermal.c | 628 +++++++++++++++++++++++++++++++++++++ >> 3 files changed, 638 insertions(+) >> create mode 100644 drivers/thermal/rockchip_thermal.c >> >> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig >> index f9a1386..24845ae 100644 >> --- a/drivers/thermal/Kconfig >> +++ b/drivers/thermal/Kconfig >> @@ -133,6 +133,15 @@ config SPEAR_THERMAL >> Enable this to plug the SPEAr thermal sensor driver into the Linux >> thermal framework. >> >> +config ROCKCHIP_THERMAL >> + tristate "Rockchip thermal driver" >> + depends on ARCH_ROCKCHIP >> + help >> + Rockchip thermal driver provides support for Temperature sensor >> + ADC (TS-ADC) found on Rockchip SoCs. It supports one critical >> + trip point. Cpufreq is used as the cooling device and will throttle >> + CPUs when the Temperature crosses the passive trip point. >> + >> config RCAR_THERMAL >> tristate "Renesas R-Car thermal driver" >> depends on ARCH_SHMOBILE || COMPILE_TEST >> diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile >> index de0636a..930554f 100644 >> --- a/drivers/thermal/Makefile >> +++ b/drivers/thermal/Makefile >> @@ -19,6 +19,7 @@ thermal_sys-$(CONFIG_CPU_THERMAL) += cpu_cooling.o >> >> # platform thermal drivers >> obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o >> +obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o >> obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o >> obj-$(CONFIG_KIRKWOOD_THERMAL) += kirkwood_thermal.o >> obj-y += samsung/ >> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c >> new file mode 100644 >> index 0000000..ceee2c1 >> --- /dev/null >> +++ b/drivers/thermal/rockchip_thermal.c >> @@ -0,0 +1,628 @@ >> +/* >> + * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd >> + * >> + * This program is free software; you can redistribute it and/or modify it >> + * under the terms and conditions of the GNU General Public License, >> + * version 2, as published by the Free Software Foundation. >> + * >> + * This program is distributed in the hope it will be useful, but WITHOUT >> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or >> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for >> + * more details. >> + */ >> + >> +#include <linux/clk.h> >> +#include <linux/cpu_cooling.h> >> +#include <linux/interrupt.h> >> +#include <linux/io.h> >> +#include <linux/module.h> >> +#include <linux/of.h> >> +#include <linux/of_address.h> >> +#include <linux/of_irq.h> >> +#include <linux/platform_device.h> >> +#include <linux/thermal.h> >> + >> +/** >> +* If the temperature over a period of time High, >> +* the resulting TSHUT gave CRU module,let it reset the entire chip, >> +* or via GPIO give PMIC. >> +*/ >> +enum reset_mde { > Can we spare one more letter? ;) > OK, maybe fix it as the follows: enum reset_mde { TSADC_HT_RESET_CRU = 0, TSADC_HT_PULL_GPIO, }; >> + CRU = 0, >> + GPIO, >> +}; >> + >> +/** >> +* The system has three Teperture Sensors. >> +* channel0 is reserve,channel1 is for CPU,and >> +* channel channel 2 is for GPU. >> +*/ >> +enum sensor_id { >> + RESERVE = 0, >> + CPU, >> + GPU, >> + SENSOR_ID_END, >> +}; >> + >> +struct rockchip_thermal_data { >> + const struct rockchip_tsadc_platform_data *pdata; >> + struct thermal_zone_device *tz[SENSOR_ID_END]; >> + struct thermal_cooling_device *cdev; >> + void __iomem *regs; >> + >> + unsigned long temp_passive; >> + unsigned long hw_shut_temp; >> + unsigned long alarm_temp; >> + bool irq_enabled; >> + int irq; >> + int reset_mode; >> + int chn; >> + >> + struct clk *clk; >> + struct clk *pclk; >> +}; >> + >> +struct rockchip_tsadc_platform_data { >> + unsigned long temp_passive; >> + unsigned long hw_shut_temp; >> + int reset_mode; >> + >> + int (*irq_handle)(void __iomem *reg); > Why does it return int and not void? What is the return value of this? Fixed. instead of using void. >> + int (*initialize)(int reset_mode, int chn, void __iomem *reg, > Why does it return int and not void? What is the return value of this?> + unsigned long hw_shut_temp); Ditto. >> + int (*control)(void __iomem *reg, bool on); >> + int (*code_to_temp)(u32 code); >> + u32 (*temp_to_code)(int temp); >> + void (*set_alarm_temp)(int chn, void __iomem *reg, >> + unsigned long alarm_temp); >> +}; >> + >> +/* TSADC V2 Sensor info define: */ >> +#define TSADCV2_AUTO_CON 0x04 >> +#define TSADCV2_INT_EN 0x08 >> +#define TSADCV2_INT_PD 0x0c >> +#define TSADCV2_DATA(chn) (0x20+chn*0x04) > Unsafe macros. You want to enclose argument in parenthesis. Yeah. Hmmm, there is no thought of a good way to deal with it at the moment. Maybe do that as the follows,but should be a better way to deal. e.g: #define TSADCV2_DATA0 0x20 #define TSADCV2_DATA1 0x24 #define TSADCV2_DATA2 0x28 #define TSADCV2_DATA3 0x2c #define TSADCV2_COMP0_INT 0x30 #define TSADCV2_COMP1_INT 0x34 #define TSADCV2_COMP2_INT 0x38 #define TSADCV2_COMP3_INT 0x3c #define TSADCV2_COMP0_SHUT 0x40 #define TSADCV2_COMP1_SHUT 0x44 #define TSADCV2_COMP2_SHUT 0x48 #define TSADCV2_COMP3_SHUT 0x4c >> +#define TSADCV2_COMP_INT(chn) (0x30+chn*0x04) >> +#define TSADCV2_COMP_SHUT(chn) (0x40+chn*0x04) >> +#define TSADCV2_HIGHT_INT_DEBOUNCE 0x60 >> +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64 >> +#define TSADCV2_AUTO_PERIOD 0x68 >> +#define TSADCV2_AUTO_PERIOD_HT 0x6c >> + >> +#define TSADCV2_AUTO_EN BIT(0) >> +#define TSADCV2_AUTO_DISABLE ~BIT(0) >> +#define TSADCV2_AUTO_SRC_EN(chn) (0xf << (4 + chn)) >> +#define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8) >> + >> +#define TSADCV2_INT_SRC_EN(chn) BIT(chn) >> +#define TSADCV2_SHUT_2GPIO_SRC_EN(chn) (0xf << (4 + chn)) >> +#define TSADCV2_SHUT_2CRU_SRC_EN(chn) (0xf << (8 + chn)) >> + >> +#define TSADCV2_INT_PD_CLEAR ~BIT(8) >> + >> +#define TSADCV2_DATA_MASK 0xfff >> +#define TSADCV2_HIGHT_INT_DEBOUNCE_TIME 0x0a >> +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_TIME 0x0a >> +#define TSADCV2_AUTO_PERIOD_TIME 0x03e8 >> +#define TSADCV2_AUTO_PERIOD_HT_TIME 0x64 >> + >> +struct tsadc_table { >> + unsigned long code; >> + int temp; >> +}; >> + >> +static const struct tsadc_table v2_code_table[] = { >> + {TSADCV2_DATA_MASK, -40000}, >> + {3800, -40000}, >> + {3792, -35000}, >> + {3783, -30000}, >> + {3774, -25000}, >> + {3765, -20000}, >> + {3756, -15000}, >> + {3747, -10000}, >> + {3737, -5000}, >> + {3728, 0}, >> + {3718, 5000}, >> + {3708, 10000}, >> + {3698, 15000}, >> + {3688, 20000}, >> + {3678, 25000}, >> + {3667, 30000}, >> + {3656, 35000}, >> + {3645, 40000}, >> + {3634, 45000}, >> + {3623, 50000}, >> + {3611, 55000}, >> + {3600, 60000}, >> + {3588, 65000}, >> + {3575, 70000}, >> + {3563, 75000}, >> + {3550, 80000}, >> + {3537, 85000}, >> + {3524, 90000}, >> + {3510, 95000}, >> + {3496, 100000}, >> + {3482, 105000}, >> + {3467, 110000}, >> + {3452, 115000}, >> + {3437, 120000}, >> + {3421, 125000}, >> + {0, 125000}, >> +}; >> + >> +static int rk_tsadcv2_irq_handle(void __iomem *regs) >> +{ >> + u32 val; >> + >> + val = readl_relaxed(regs + TSADCV2_INT_PD); >> + writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD); >> + >> + return 0; >> +} >> + >> +static u32 rk_tsadcv2_temp_to_code(int temp) >> +{ >> + int high, low, mid, ret = 0; >> + >> + low = 0; >> + high = ARRAY_SIZE(v2_code_table) - 1; >> + mid = (high + low) / 2; >> + >> + if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) { >> + ret = -ERANGE; > The function returns u32, you can't return -ERANGE here. Yeah,fixed. >> + goto exit; >> + } >> + >> + while (low <= high) { >> + if (temp == v2_code_table[mid].temp) >> + return v2_code_table[mid].code; >> + else if (temp < v2_code_table[mid].temp) >> + high = mid - 1; >> + else >> + low = mid + 1; >> + mid = (low + high) / 2; >> + } > Hmm, you optimized temp_to_code but not code_to_temp, why? OK,fixed. >> + >> + return 0; >> + >> +exit: >> + return ret; >> +} >> + >> +static int rk_tsadcv2_code_to_temp(u32 code) >> +{ >> + int i; >> + >> + for (i = 0; i < ARRAY_SIZE(v2_code_table) - 1; i++) { >> + if (code >= v2_code_table[i].code) >> + return v2_code_table[i].temp; >> + } >> + >> + /* No code available,return max temperture */ >> + return 125000; >> +} >> + >> +static int rk_tsadcv2_initialize(int reset_mode, int chn, void __iomem *regs, >> + unsigned long hw_shut_temp) >> +{ >> + u32 shutdown_value; >> + >> + shutdown_value = rk_tsadcv2_temp_to_code(hw_shut_temp); >> + >> + /* Enable measurements at ~ 10 Hz */ >> + writel_relaxed(0 | TSADCV2_AUTO_TSHUT_POLARITY_HIGH, regs + >> + TSADCV2_AUTO_CON); >> + writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD); >> + writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, regs + >> + TSADCV2_AUTO_PERIOD_HT); >> + writel_relaxed(shutdown_value, regs + TSADCV2_COMP_SHUT(chn)); >> + writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_TIME, regs + >> + TSADCV2_HIGHT_INT_DEBOUNCE); >> + writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_TIME, regs + >> + TSADCV2_HIGHT_TSHUT_DEBOUNCE); >> + >> + if (reset_mode == GPIO) >> + writel_relaxed(TSADCV2_SHUT_2GPIO_SRC_EN(chn) | >> + TSADCV2_INT_SRC_EN(chn), regs + >> + TSADCV2_INT_EN); >> + else >> + writel_relaxed(TSADCV2_SHUT_2CRU_SRC_EN(chn) | >> + TSADCV2_INT_SRC_EN(chn) , regs + >> + TSADCV2_INT_EN); >> + >> + writel_relaxed(TSADCV2_AUTO_SRC_EN(chn) | TSADCV2_AUTO_EN, regs + >> + TSADCV2_AUTO_CON); >> + >> + return 0; >> +} >> + >> +static int rk_tsadcv2_control(void __iomem *regs, bool on) >> +{ >> + u32 val; >> + >> + if (on) { >> + val = readl_relaxed(regs + TSADCV2_AUTO_CON); >> + writel_relaxed(val | TSADCV2_AUTO_EN, regs + TSADCV2_AUTO_CON); >> + } else { >> + val = readl_relaxed(regs + TSADCV2_AUTO_CON); >> + writel_relaxed(val & TSADCV2_AUTO_DISABLE, >> + regs + TSADCV2_AUTO_CON); >> + } >> + >> + return 0; >> +} >> + >> +static void rk_tsadcv2_alarm_temp(int chn, void __iomem *regs, >> + unsigned long alarm_temp) >> +{ >> + u32 alarm_value; >> + >> + alarm_value = rk_tsadcv2_temp_to_code(alarm_temp); >> + >> + writel_relaxed(alarm_value & TSADCV2_DATA_MASK, regs + >> + TSADCV2_COMP_INT(chn)); >> +} >> + >> +static const struct rockchip_tsadc_platform_data rk3288_tsadc_data = { >> + .reset_mode = GPIO, /* default TSHUT via GPIO give PMIC */ >> + .temp_passive = 80000, >> + .hw_shut_temp = 120000, >> + .irq_handle = rk_tsadcv2_irq_handle, >> + .initialize = rk_tsadcv2_initialize, >> + .control = rk_tsadcv2_control, >> + .code_to_temp = rk_tsadcv2_code_to_temp, >> + .temp_to_code = rk_tsadcv2_temp_to_code, >> + .set_alarm_temp = rk_tsadcv2_alarm_temp, >> +}; >> + >> +static const struct of_device_id of_rockchip_thermal_match[] = { >> + { >> + .compatible = "rockchip,rk3288-tsadc", >> + .data = (void *)&rk3288_tsadc_data, >> + }, >> + { /* end */ }, >> +}; >> +MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); >> + >> +static void rockchip_set_alarm_temp(struct rockchip_thermal_data *data, >> + int alarm_temp) >> +{ >> + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; >> + >> + data->alarm_temp = alarm_temp; >> + if (tsadc->set_alarm_temp) >> + tsadc->set_alarm_temp(data->chn, data->regs, alarm_temp); >> +} >> + >> +static int rockchip_thermal_initialize(struct rockchip_thermal_data *data) >> +{ >> + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; >> + >> + if (data->chn == RESERVE) >> + return 0; >> + >> + if (tsadc->initialize) >> + tsadc->initialize(tsadc->reset_mode, data->chn, data->regs, >> + data->hw_shut_temp); >> + >> + rockchip_set_alarm_temp(data, data->temp_passive); >> + >> + return 0; >> +} >> + >> +static void rockchip_thermal_control(struct rockchip_thermal_data *data, >> + bool on) >> +{ >> + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; >> + >> + if (tsadc->control) >> + tsadc->control(data->regs, on); >> + >> + if (on) { >> + data->irq_enabled = true; >> + data->tz[data->chn]->ops->set_mode(data->tz[data->chn], >> + THERMAL_DEVICE_ENABLED); >> + } else { >> + data->irq_enabled = false; >> + data->tz[data->chn]->ops->set_mode(data->tz[data->chn], >> + THERMAL_DEVICE_DISABLED); >> + } >> +} >> + >> +static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev) >> +{ >> + struct rockchip_thermal_data *data = dev; >> + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; >> + int chn; >> + >> + if (tsadc->irq_handle) >> + tsadc->irq_handle(data->regs); >> + >> + for (chn = CPU; chn < SENSOR_ID_END; chn++) >> + thermal_zone_device_update(data->tz[chn]); >> + >> + return IRQ_HANDLED; >> +} >> + >> +static int rockchip_thermal_set_trips(void *zone, long low, long high) >> +{ >> + struct rockchip_thermal_data *data = zone; >> + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; >> + u32 val; >> + >> + low = clamp_val(low, LONG_MIN, LONG_MAX); >> + high = clamp_val(high, LONG_MIN, LONG_MAX); >> + >> + /* channel0 is RESERVE, not need to set trips*/ >> + if (data->chn == RESERVE) >> + return 0; >> + >> + val = readl_relaxed(data->regs + TSADCV2_DATA(data->chn)); > I do not think you need to re-read the temperature: you are already > goivent lower and upper trip points for current temperature, you just > need to set alarm to the upper one. > Fixed. >> + if (val == 0) >> + return -EPROBE_DEFER; > What -EPROBE_DEFER means in this context? > In general, the A/D value of the channel last conversion need some time. There isn't a need in here. >> + >> + /* Update alarm value to next higher trip point */ >> + if (data->alarm_temp == data->temp_passive && val <= >> + tsadc->temp_to_code(data->temp_passive)) >> + high = data->hw_shut_temp; >> + >> + if (data->alarm_temp >= data->temp_passive && val > >> + tsadc->temp_to_code(data->temp_passive)) { >> + high = data->temp_passive; >> + } >> + >> + return 0; >> +} >> + >> +static int rockchip_thermal_get_temp(void *zone, long *out_temp) >> +{ >> + struct rockchip_thermal_data *data = zone; >> + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; >> + u32 val; >> + >> + if (data->chn == RESERVE) >> + return 0; >> + >> + val = readl_relaxed(data->regs + TSADCV2_DATA(data->chn)); >> + >> + if (val < tsadc->temp_to_code(data->hw_shut_temp)) >> + *out_temp = 120000; > Why is this needed? If this is really needed please comment the code. Fixed. It's not need. >> + else >> + *out_temp = tsadc->code_to_temp(val); >> + >> + return 0; >> +} >> + >> +static int rockchip_configure_from_dt(struct device *dev, >> + struct device_node *np, >> + struct rockchip_thermal_data *data) >> +{ >> + int shut_temp, reset_mode; >> + >> + if (of_property_read_u32(np, "hw-shut-temp", &shut_temp)) { >> + dev_warn(dev, "Missing default shutdown temp property\n"); >> + data->hw_shut_temp = data->pdata->hw_shut_temp; > I am still not sure why we want it in DT. I envision the set up as > follows: > > passive trip point - defined in DT > critical trip point - defined in DT, causes shutdown performed by > thermal core for us > hardware critical - hard coded (defined by the hardware, no point in > changing), shuts down or resets the box automatically by the hardware, > no kernel involved. Although TSHUT(hardware shutdown temperature value) is not a generic trip point, TSHUT value is relative fixed and need be init as the tsadc_comp. hmm..,if it doeen't define in the DT,we had to get a TSHUT from data, as the about: dev_warn(dev, "Missing default shutdown temp property\n"); data->hw_shut_temp = data->pdata->hw_shut_temp; >> + } else { >> + data->hw_shut_temp = shut_temp; >> + } >> + >> + if (of_property_read_u32(np, "tsadc-ht-reset-mode", &reset_mode)) { >> + dev_warn(dev, "Missing default reset mode property\n"); >> + data->reset_mode = data->pdata->reset_mode; >> + } else { >> + data->reset_mode = reset_mode; >> + } >> + >> + data->temp_passive = data->pdata->temp_passive; >> + >> + return 0; >> +} >> + >> +static int rockchip_thermal_probe(struct platform_device *pdev) >> +{ >> + struct rockchip_thermal_data *data; >> + const struct rockchip_tsadc_platform_data *tsadc; >> + const struct of_device_id *match; >> + >> + struct cpumask clip_cpus; >> + struct resource *res; >> + struct device_node *np = pdev->dev.of_node; >> + >> + int ret, err, chn; >> + >> + data = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data), >> + GFP_KERNEL); >> + if (!data) >> + return -ENOMEM; >> + >> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); >> + data->regs = devm_ioremap_resource(&pdev->dev, res); >> + if (IS_ERR(data->regs)) { >> + dev_err(&pdev->dev, "Could not get tsadc source, %p\n", >> + data->regs); >> + return PTR_ERR(data->regs); >> + } >> + >> + match = of_match_node(of_rockchip_thermal_match, np); >> + if (!match) >> + return -ENXIO; >> + data->pdata = (const struct rockchip_tsadc_platform_data *)match->data; >> + if (!data->pdata) >> + return -EINVAL; >> + tsadc = data->pdata; >> + >> + data->clk = devm_clk_get(&pdev->dev, "tsadc"); >> + if (IS_ERR(data->clk)) { >> + dev_err(&pdev->dev, "failed to get tsadc clock\n"); >> + return PTR_ERR(data->clk); >> + } >> + >> + data->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); >> + if (IS_ERR(data->pclk)) { >> + dev_err(&pdev->dev, "failed to get tsadc pclk\n"); >> + return PTR_ERR(data->pclk); >> + } >> + >> + /** >> + * Use a default of 10KHz for the converter clock. >> + * This may become user-configurable in the future. >> + * Need to judge the data->clk is Divided by xin32k. >> + * Need to retry it if the pmic hasn't output the xin32k. >> + */ >> + if (clk_get_rate(data->clk) == 0) >> + return -EPROBE_DEFER; > What would cause the clock to be present but report 0 rate? Are we sure > that it will start reporting different data after binding some more > drivers? > The clk is divided by xin32k from PMIC(rk808_clk_out), the PMIC output the xin32k seem isn't readied before get the clk. If the PMIC(rk808) driver is more front loading,I believe it will hasn't this prblem. >> + ret = clk_set_rate(data->clk, 10000); >> + if (ret < 0) { >> + dev_err(&pdev->dev, "failed to set tsadc clk rate, %d\n", ret); >> + return ret; >> + } >> + >> + ret = clk_prepare_enable(data->clk); >> + if (ret < 0) { >> + dev_err(&pdev->dev, "failed to enable converter clock\n"); >> + goto err_clk; >> + } >> + >> + ret = clk_prepare_enable(data->pclk); >> + if (ret < 0) { >> + dev_err(&pdev->dev, "failed to enable pclk\n"); >> + goto err_pclk; >> + } >> + >> + cpumask_set_cpu(0, &clip_cpus); >> + data->cdev = of_cpufreq_cooling_register(np, &clip_cpus); >> + if (IS_ERR(data->cdev)) { >> + dev_err(&pdev->dev, "failed to register cpufreq cooling device\n"); >> + goto disable_clk; >> + } >> + >> + data->irq = platform_get_irq(pdev, 0); >> + if (data->irq < 0) { >> + dev_err(&pdev->dev, "no irq resource?\n"); >> + goto disable_clk; >> + } >> + >> + ret = devm_request_threaded_irq(&pdev->dev, data->irq, NULL, >> + &rockchip_thermal_alarm_irq_thread, >> + IRQF_ONESHOT, "rockchip_thermal", >> + data); >> + if (ret < 0) { >> + dev_err(&pdev->dev, >> + "failed to request tsadc irq: %d\n", ret); >> + goto disable_clk; >> + } >> + >> + ret = rockchip_configure_from_dt(&pdev->dev, np, data); >> + if (ret) >> + dev_err(&pdev->dev, "Parsing device tree data error.\n"); >> + >> + /* The system three Teperture Sensors be registered */ >> + for (chn = RESERVE; chn < SENSOR_ID_END; chn++) { >> + data->chn = chn; >> + >> + data->tz[chn] = thermal_zone_of_sensor_register( >> + &pdev->dev, data->chn, >> + data, rockchip_thermal_get_temp, >> + NULL, >> + rockchip_thermal_set_trips); >> + if (IS_ERR(data->tz[chn])) { >> + err = PTR_ERR(data->tz[chn]); >> + dev_err(&pdev->dev, "failed to register sensor: %d\n", >> + err); >> + chn--; >> + goto unregister_tzs; >> + } > Do we have to have all zones defined? Why? > Yes, I think so. At least, CPU and GPU zone is need. As the TRM introduce,this system has three temperature sensors. >> + >> + platform_set_drvdata(pdev, data); >> + >> + rockchip_thermal_initialize(data); >> + rockchip_thermal_control(data, true); >> + } >> + return 0; >> + >> +unregister_tzs: >> + for (; chn >= RESERVE; chn--) >> + thermal_zone_of_sensor_unregister(&pdev->dev, data->tz[chn]); >> + cpufreq_cooling_unregister(data->cdev); >> + >> +disable_clk: >> +err_pclk: >> + clk_disable_unprepare(data->pclk); >> +err_clk: >> + clk_disable_unprepare(data->clk); >> + >> + return ret; >> +} >> + >> +static int rockchip_thermal_remove(struct platform_device *pdev) >> +{ >> + struct rockchip_thermal_data *data = platform_get_drvdata(pdev); >> + int chn; >> + >> + rockchip_thermal_control(data, false); >> + >> + for (; chn >= RESERVE; chn--) > You are not initializing chn, it will blow up. Fixed. >> + thermal_zone_of_sensor_unregister(&pdev->dev, data->tz[chn]); >> + cpufreq_cooling_unregister(data->cdev); >> + >> + clk_disable_unprepare(data->clk); >> + clk_disable_unprepare(data->pclk); >> + >> + return 0; >> +} >> + >> +#ifdef CONFIG_PM_SLEEP >> +static int rockchip_thermal_suspend(struct device *dev) >> +{ >> + struct platform_device *pdev = to_platform_device(dev); >> + struct rockchip_thermal_data *data = platform_get_drvdata(pdev); >> + >> + rockchip_thermal_control(data, false); >> + >> + clk_disable_unprepare(data->clk); >> + clk_disable_unprepare(data->pclk); > Why do we unpreparing in suspend instead of just disabling? Fixed. >> + >> + return 0; >> +} >> + >> +static int rockchip_thermal_resume(struct device *dev) >> +{ >> + struct platform_device *pdev = to_platform_device(dev); >> + struct rockchip_thermal_data *data = platform_get_drvdata(pdev); >> + int ret; >> + >> + ret = clk_prepare_enable(data->pclk); >> + if (ret) >> + return ret; >> + >> + ret = clk_prepare_enable(data->clk); >> + if (ret) >> + return ret; >> + >> + rockchip_thermal_initialize(data); >> + rockchip_thermal_control(data, true); >> + >> + return 0; >> +} >> +#endif >> + >> +static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops, >> + rockchip_thermal_suspend, rockchip_thermal_resume); >> + >> +static struct platform_driver rockchip_thermal_driver = { >> + .driver = { >> + .name = "rockchip-thermal", >> + .owner = THIS_MODULE, >> + .pm = &rockchip_thermal_pm_ops, >> + .of_match_table = of_rockchip_thermal_match, >> + }, >> + .probe = rockchip_thermal_probe, >> + .remove = rockchip_thermal_remove, >> +}; >> + >> +module_platform_driver(rockchip_thermal_driver); >> + >> +MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver"); >> +MODULE_AUTHOR("Rockchip, Inc."); >> +MODULE_LICENSE("GPL v2"); >> +MODULE_ALIAS("platform:rockchip-thermal"); >> -- >> 1.9.1 >> >> > Thanks. >
Hi Caesar, On Sat, Oct 11, 2014 at 02:01:33PM +0800, Caesar Wang wrote: > Dear Dmitry, > > ? 2014?10?11? 01:46, Dmitry Torokhov ??: > >Hi Caesar, > > > >On Fri, Oct 10, 2014 at 06:19:37PM +0800, Caesar Wang wrote: > >>Thermal is TS-ADC Controller module supports > >>user-defined mode and automatic mode. > >> > >>User-defined mode refers,TSADC all the control signals entirely by > >>software writing to register for direct control. > >> > >>Automaic mode refers to the module automatically poll TSADC output, > >>and the results were checked.If you find that the temperature High > >>in a period of time,an interrupt is generated to the processor > >>down-measures taken;If the temperature over a period of time High, > >>the resulting TSHUT gave CRU module,let it reset the entire chip, > >>or via GPIO give PMIC. > >> > >>Signed-off-by: zhaoyifeng <zyf@rock-chips.com> > >>Signed-off-by: Caesar Wang <caesar.wang@rock-chips.com> > >>--- > >> drivers/thermal/Kconfig | 9 + > >> drivers/thermal/Makefile | 1 + > >> drivers/thermal/rockchip_thermal.c | 628 +++++++++++++++++++++++++++++++++++++ > >> 3 files changed, 638 insertions(+) > >> create mode 100644 drivers/thermal/rockchip_thermal.c > >> > >>diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig > >>index f9a1386..24845ae 100644 > >>--- a/drivers/thermal/Kconfig > >>+++ b/drivers/thermal/Kconfig > >>@@ -133,6 +133,15 @@ config SPEAR_THERMAL > >> Enable this to plug the SPEAr thermal sensor driver into the Linux > >> thermal framework. > >>+config ROCKCHIP_THERMAL > >>+ tristate "Rockchip thermal driver" > >>+ depends on ARCH_ROCKCHIP > >>+ help > >>+ Rockchip thermal driver provides support for Temperature sensor > >>+ ADC (TS-ADC) found on Rockchip SoCs. It supports one critical > >>+ trip point. Cpufreq is used as the cooling device and will throttle > >>+ CPUs when the Temperature crosses the passive trip point. > >>+ > >> config RCAR_THERMAL > >> tristate "Renesas R-Car thermal driver" > >> depends on ARCH_SHMOBILE || COMPILE_TEST > >>diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile > >>index de0636a..930554f 100644 > >>--- a/drivers/thermal/Makefile > >>+++ b/drivers/thermal/Makefile > >>@@ -19,6 +19,7 @@ thermal_sys-$(CONFIG_CPU_THERMAL) += cpu_cooling.o > >> # platform thermal drivers > >> obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o > >>+obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o > >> obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o > >> obj-$(CONFIG_KIRKWOOD_THERMAL) += kirkwood_thermal.o > >> obj-y += samsung/ > >>diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c > >>new file mode 100644 > >>index 0000000..ceee2c1 > >>--- /dev/null > >>+++ b/drivers/thermal/rockchip_thermal.c > >>@@ -0,0 +1,628 @@ > >>+/* > >>+ * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd > >>+ * > >>+ * This program is free software; you can redistribute it and/or modify it > >>+ * under the terms and conditions of the GNU General Public License, > >>+ * version 2, as published by the Free Software Foundation. > >>+ * > >>+ * This program is distributed in the hope it will be useful, but WITHOUT > >>+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or > >>+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for > >>+ * more details. > >>+ */ > >>+ > >>+#include <linux/clk.h> > >>+#include <linux/cpu_cooling.h> > >>+#include <linux/interrupt.h> > >>+#include <linux/io.h> > >>+#include <linux/module.h> > >>+#include <linux/of.h> > >>+#include <linux/of_address.h> > >>+#include <linux/of_irq.h> > >>+#include <linux/platform_device.h> > >>+#include <linux/thermal.h> > >>+ > >>+/** > >>+* If the temperature over a period of time High, > >>+* the resulting TSHUT gave CRU module,let it reset the entire chip, > >>+* or via GPIO give PMIC. > >>+*/ > >>+enum reset_mde { > >Can we spare one more letter? ;) > > > > OK, maybe fix it as the follows: > > enum reset_mde { > TSADC_HT_RESET_CRU = 0, > TSADC_HT_PULL_GPIO, > }; I meant to spell "mode" out, like this: enum reset_mode { ... }; > >>+ CRU = 0, > >>+ GPIO, > >>+}; > >>+ > >>+/** > >>+* The system has three Teperture Sensors. > >>+* channel0 is reserve,channel1 is for CPU,and > >>+* channel channel 2 is for GPU. > >>+*/ > >>+enum sensor_id { > >>+ RESERVE = 0, > >>+ CPU, > >>+ GPU, > >>+ SENSOR_ID_END, > >>+}; > >>+ > >>+struct rockchip_thermal_data { > >>+ const struct rockchip_tsadc_platform_data *pdata; > >>+ struct thermal_zone_device *tz[SENSOR_ID_END]; > >>+ struct thermal_cooling_device *cdev; > >>+ void __iomem *regs; > >>+ > >>+ unsigned long temp_passive; > >>+ unsigned long hw_shut_temp; > >>+ unsigned long alarm_temp; > >>+ bool irq_enabled; > >>+ int irq; > >>+ int reset_mode; > >>+ int chn; > >>+ > >>+ struct clk *clk; > >>+ struct clk *pclk; > >>+}; > >>+ > >>+struct rockchip_tsadc_platform_data { > >>+ unsigned long temp_passive; > >>+ unsigned long hw_shut_temp; > >>+ int reset_mode; > >>+ > >>+ int (*irq_handle)(void __iomem *reg); > >Why does it return int and not void? What is the return value of this? > > Fixed. instead of using void. > >>+ int (*initialize)(int reset_mode, int chn, void __iomem *reg, > >Why does it return int and not void? What is the return value of this?> + unsigned long hw_shut_temp); > > Ditto. > > >>+ int (*control)(void __iomem *reg, bool on); > >>+ int (*code_to_temp)(u32 code); > >>+ u32 (*temp_to_code)(int temp); > >>+ void (*set_alarm_temp)(int chn, void __iomem *reg, > >>+ unsigned long alarm_temp); > >>+}; > >>+ > >>+/* TSADC V2 Sensor info define: */ > >>+#define TSADCV2_AUTO_CON 0x04 > >>+#define TSADCV2_INT_EN 0x08 > >>+#define TSADCV2_INT_PD 0x0c > >>+#define TSADCV2_DATA(chn) (0x20+chn*0x04) > >Unsafe macros. You want to enclose argument in parenthesis. > > Yeah. > Hmmm, there is no thought of a good way to deal with it at the moment. > > Maybe do that as the follows,but should be a better way to deal. No, I meant #define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04) This way one can safely pass expressions as argument, like TSADCV2_DATA(i + 1) will evaluate properly. Thanks.
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index f9a1386..24845ae 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -133,6 +133,15 @@ config SPEAR_THERMAL Enable this to plug the SPEAr thermal sensor driver into the Linux thermal framework. +config ROCKCHIP_THERMAL + tristate "Rockchip thermal driver" + depends on ARCH_ROCKCHIP + help + Rockchip thermal driver provides support for Temperature sensor + ADC (TS-ADC) found on Rockchip SoCs. It supports one critical + trip point. Cpufreq is used as the cooling device and will throttle + CPUs when the Temperature crosses the passive trip point. + config RCAR_THERMAL tristate "Renesas R-Car thermal driver" depends on ARCH_SHMOBILE || COMPILE_TEST diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index de0636a..930554f 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -19,6 +19,7 @@ thermal_sys-$(CONFIG_CPU_THERMAL) += cpu_cooling.o # platform thermal drivers obj-$(CONFIG_SPEAR_THERMAL) += spear_thermal.o +obj-$(CONFIG_ROCKCHIP_THERMAL) += rockchip_thermal.o obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o obj-$(CONFIG_KIRKWOOD_THERMAL) += kirkwood_thermal.o obj-y += samsung/ diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c new file mode 100644 index 0000000..ceee2c1 --- /dev/null +++ b/drivers/thermal/rockchip_thermal.c @@ -0,0 +1,628 @@ +/* + * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + */ + +#include <linux/clk.h> +#include <linux/cpu_cooling.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/platform_device.h> +#include <linux/thermal.h> + +/** +* If the temperature over a period of time High, +* the resulting TSHUT gave CRU module,let it reset the entire chip, +* or via GPIO give PMIC. +*/ +enum reset_mde { + CRU = 0, + GPIO, +}; + +/** +* The system has three Teperture Sensors. +* channel0 is reserve,channel1 is for CPU,and +* channel channel 2 is for GPU. +*/ +enum sensor_id { + RESERVE = 0, + CPU, + GPU, + SENSOR_ID_END, +}; + +struct rockchip_thermal_data { + const struct rockchip_tsadc_platform_data *pdata; + struct thermal_zone_device *tz[SENSOR_ID_END]; + struct thermal_cooling_device *cdev; + void __iomem *regs; + + unsigned long temp_passive; + unsigned long hw_shut_temp; + unsigned long alarm_temp; + bool irq_enabled; + int irq; + int reset_mode; + int chn; + + struct clk *clk; + struct clk *pclk; +}; + +struct rockchip_tsadc_platform_data { + unsigned long temp_passive; + unsigned long hw_shut_temp; + int reset_mode; + + int (*irq_handle)(void __iomem *reg); + int (*initialize)(int reset_mode, int chn, void __iomem *reg, + unsigned long hw_shut_temp); + int (*control)(void __iomem *reg, bool on); + int (*code_to_temp)(u32 code); + u32 (*temp_to_code)(int temp); + void (*set_alarm_temp)(int chn, void __iomem *reg, + unsigned long alarm_temp); +}; + +/* TSADC V2 Sensor info define: */ +#define TSADCV2_AUTO_CON 0x04 +#define TSADCV2_INT_EN 0x08 +#define TSADCV2_INT_PD 0x0c +#define TSADCV2_DATA(chn) (0x20+chn*0x04) +#define TSADCV2_COMP_INT(chn) (0x30+chn*0x04) +#define TSADCV2_COMP_SHUT(chn) (0x40+chn*0x04) +#define TSADCV2_HIGHT_INT_DEBOUNCE 0x60 +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64 +#define TSADCV2_AUTO_PERIOD 0x68 +#define TSADCV2_AUTO_PERIOD_HT 0x6c + +#define TSADCV2_AUTO_EN BIT(0) +#define TSADCV2_AUTO_DISABLE ~BIT(0) +#define TSADCV2_AUTO_SRC_EN(chn) (0xf << (4 + chn)) +#define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8) + +#define TSADCV2_INT_SRC_EN(chn) BIT(chn) +#define TSADCV2_SHUT_2GPIO_SRC_EN(chn) (0xf << (4 + chn)) +#define TSADCV2_SHUT_2CRU_SRC_EN(chn) (0xf << (8 + chn)) + +#define TSADCV2_INT_PD_CLEAR ~BIT(8) + +#define TSADCV2_DATA_MASK 0xfff +#define TSADCV2_HIGHT_INT_DEBOUNCE_TIME 0x0a +#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_TIME 0x0a +#define TSADCV2_AUTO_PERIOD_TIME 0x03e8 +#define TSADCV2_AUTO_PERIOD_HT_TIME 0x64 + +struct tsadc_table { + unsigned long code; + int temp; +}; + +static const struct tsadc_table v2_code_table[] = { + {TSADCV2_DATA_MASK, -40000}, + {3800, -40000}, + {3792, -35000}, + {3783, -30000}, + {3774, -25000}, + {3765, -20000}, + {3756, -15000}, + {3747, -10000}, + {3737, -5000}, + {3728, 0}, + {3718, 5000}, + {3708, 10000}, + {3698, 15000}, + {3688, 20000}, + {3678, 25000}, + {3667, 30000}, + {3656, 35000}, + {3645, 40000}, + {3634, 45000}, + {3623, 50000}, + {3611, 55000}, + {3600, 60000}, + {3588, 65000}, + {3575, 70000}, + {3563, 75000}, + {3550, 80000}, + {3537, 85000}, + {3524, 90000}, + {3510, 95000}, + {3496, 100000}, + {3482, 105000}, + {3467, 110000}, + {3452, 115000}, + {3437, 120000}, + {3421, 125000}, + {0, 125000}, +}; + +static int rk_tsadcv2_irq_handle(void __iomem *regs) +{ + u32 val; + + val = readl_relaxed(regs + TSADCV2_INT_PD); + writel_relaxed(val & TSADCV2_INT_PD_CLEAR, regs + TSADCV2_INT_PD); + + return 0; +} + +static u32 rk_tsadcv2_temp_to_code(int temp) +{ + int high, low, mid, ret = 0; + + low = 0; + high = ARRAY_SIZE(v2_code_table) - 1; + mid = (high + low) / 2; + + if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) { + ret = -ERANGE; + goto exit; + } + + while (low <= high) { + if (temp == v2_code_table[mid].temp) + return v2_code_table[mid].code; + else if (temp < v2_code_table[mid].temp) + high = mid - 1; + else + low = mid + 1; + mid = (low + high) / 2; + } + + return 0; + +exit: + return ret; +} + +static int rk_tsadcv2_code_to_temp(u32 code) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(v2_code_table) - 1; i++) { + if (code >= v2_code_table[i].code) + return v2_code_table[i].temp; + } + + /* No code available,return max temperture */ + return 125000; +} + +static int rk_tsadcv2_initialize(int reset_mode, int chn, void __iomem *regs, + unsigned long hw_shut_temp) +{ + u32 shutdown_value; + + shutdown_value = rk_tsadcv2_temp_to_code(hw_shut_temp); + + /* Enable measurements at ~ 10 Hz */ + writel_relaxed(0 | TSADCV2_AUTO_TSHUT_POLARITY_HIGH, regs + + TSADCV2_AUTO_CON); + writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD); + writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, regs + + TSADCV2_AUTO_PERIOD_HT); + writel_relaxed(shutdown_value, regs + TSADCV2_COMP_SHUT(chn)); + writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_TIME, regs + + TSADCV2_HIGHT_INT_DEBOUNCE); + writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_TIME, regs + + TSADCV2_HIGHT_TSHUT_DEBOUNCE); + + if (reset_mode == GPIO) + writel_relaxed(TSADCV2_SHUT_2GPIO_SRC_EN(chn) | + TSADCV2_INT_SRC_EN(chn), regs + + TSADCV2_INT_EN); + else + writel_relaxed(TSADCV2_SHUT_2CRU_SRC_EN(chn) | + TSADCV2_INT_SRC_EN(chn) , regs + + TSADCV2_INT_EN); + + writel_relaxed(TSADCV2_AUTO_SRC_EN(chn) | TSADCV2_AUTO_EN, regs + + TSADCV2_AUTO_CON); + + return 0; +} + +static int rk_tsadcv2_control(void __iomem *regs, bool on) +{ + u32 val; + + if (on) { + val = readl_relaxed(regs + TSADCV2_AUTO_CON); + writel_relaxed(val | TSADCV2_AUTO_EN, regs + TSADCV2_AUTO_CON); + } else { + val = readl_relaxed(regs + TSADCV2_AUTO_CON); + writel_relaxed(val & TSADCV2_AUTO_DISABLE, + regs + TSADCV2_AUTO_CON); + } + + return 0; +} + +static void rk_tsadcv2_alarm_temp(int chn, void __iomem *regs, + unsigned long alarm_temp) +{ + u32 alarm_value; + + alarm_value = rk_tsadcv2_temp_to_code(alarm_temp); + + writel_relaxed(alarm_value & TSADCV2_DATA_MASK, regs + + TSADCV2_COMP_INT(chn)); +} + +static const struct rockchip_tsadc_platform_data rk3288_tsadc_data = { + .reset_mode = GPIO, /* default TSHUT via GPIO give PMIC */ + .temp_passive = 80000, + .hw_shut_temp = 120000, + .irq_handle = rk_tsadcv2_irq_handle, + .initialize = rk_tsadcv2_initialize, + .control = rk_tsadcv2_control, + .code_to_temp = rk_tsadcv2_code_to_temp, + .temp_to_code = rk_tsadcv2_temp_to_code, + .set_alarm_temp = rk_tsadcv2_alarm_temp, +}; + +static const struct of_device_id of_rockchip_thermal_match[] = { + { + .compatible = "rockchip,rk3288-tsadc", + .data = (void *)&rk3288_tsadc_data, + }, + { /* end */ }, +}; +MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); + +static void rockchip_set_alarm_temp(struct rockchip_thermal_data *data, + int alarm_temp) +{ + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; + + data->alarm_temp = alarm_temp; + if (tsadc->set_alarm_temp) + tsadc->set_alarm_temp(data->chn, data->regs, alarm_temp); +} + +static int rockchip_thermal_initialize(struct rockchip_thermal_data *data) +{ + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; + + if (data->chn == RESERVE) + return 0; + + if (tsadc->initialize) + tsadc->initialize(tsadc->reset_mode, data->chn, data->regs, + data->hw_shut_temp); + + rockchip_set_alarm_temp(data, data->temp_passive); + + return 0; +} + +static void rockchip_thermal_control(struct rockchip_thermal_data *data, + bool on) +{ + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; + + if (tsadc->control) + tsadc->control(data->regs, on); + + if (on) { + data->irq_enabled = true; + data->tz[data->chn]->ops->set_mode(data->tz[data->chn], + THERMAL_DEVICE_ENABLED); + } else { + data->irq_enabled = false; + data->tz[data->chn]->ops->set_mode(data->tz[data->chn], + THERMAL_DEVICE_DISABLED); + } +} + +static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev) +{ + struct rockchip_thermal_data *data = dev; + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; + int chn; + + if (tsadc->irq_handle) + tsadc->irq_handle(data->regs); + + for (chn = CPU; chn < SENSOR_ID_END; chn++) + thermal_zone_device_update(data->tz[chn]); + + return IRQ_HANDLED; +} + +static int rockchip_thermal_set_trips(void *zone, long low, long high) +{ + struct rockchip_thermal_data *data = zone; + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; + u32 val; + + low = clamp_val(low, LONG_MIN, LONG_MAX); + high = clamp_val(high, LONG_MIN, LONG_MAX); + + /* channel0 is RESERVE, not need to set trips*/ + if (data->chn == RESERVE) + return 0; + + val = readl_relaxed(data->regs + TSADCV2_DATA(data->chn)); + if (val == 0) + return -EPROBE_DEFER; + + /* Update alarm value to next higher trip point */ + if (data->alarm_temp == data->temp_passive && val <= + tsadc->temp_to_code(data->temp_passive)) + high = data->hw_shut_temp; + + if (data->alarm_temp >= data->temp_passive && val > + tsadc->temp_to_code(data->temp_passive)) { + high = data->temp_passive; + } + + return 0; +} + +static int rockchip_thermal_get_temp(void *zone, long *out_temp) +{ + struct rockchip_thermal_data *data = zone; + const struct rockchip_tsadc_platform_data *tsadc = data->pdata; + u32 val; + + if (data->chn == RESERVE) + return 0; + + val = readl_relaxed(data->regs + TSADCV2_DATA(data->chn)); + + if (val < tsadc->temp_to_code(data->hw_shut_temp)) + *out_temp = 120000; + else + *out_temp = tsadc->code_to_temp(val); + + return 0; +} + +static int rockchip_configure_from_dt(struct device *dev, + struct device_node *np, + struct rockchip_thermal_data *data) +{ + int shut_temp, reset_mode; + + if (of_property_read_u32(np, "hw-shut-temp", &shut_temp)) { + dev_warn(dev, "Missing default shutdown temp property\n"); + data->hw_shut_temp = data->pdata->hw_shut_temp; + } else { + data->hw_shut_temp = shut_temp; + } + + if (of_property_read_u32(np, "tsadc-ht-reset-mode", &reset_mode)) { + dev_warn(dev, "Missing default reset mode property\n"); + data->reset_mode = data->pdata->reset_mode; + } else { + data->reset_mode = reset_mode; + } + + data->temp_passive = data->pdata->temp_passive; + + return 0; +} + +static int rockchip_thermal_probe(struct platform_device *pdev) +{ + struct rockchip_thermal_data *data; + const struct rockchip_tsadc_platform_data *tsadc; + const struct of_device_id *match; + + struct cpumask clip_cpus; + struct resource *res; + struct device_node *np = pdev->dev.of_node; + + int ret, err, chn; + + data = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data), + GFP_KERNEL); + if (!data) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + data->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(data->regs)) { + dev_err(&pdev->dev, "Could not get tsadc source, %p\n", + data->regs); + return PTR_ERR(data->regs); + } + + match = of_match_node(of_rockchip_thermal_match, np); + if (!match) + return -ENXIO; + data->pdata = (const struct rockchip_tsadc_platform_data *)match->data; + if (!data->pdata) + return -EINVAL; + tsadc = data->pdata; + + data->clk = devm_clk_get(&pdev->dev, "tsadc"); + if (IS_ERR(data->clk)) { + dev_err(&pdev->dev, "failed to get tsadc clock\n"); + return PTR_ERR(data->clk); + } + + data->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); + if (IS_ERR(data->pclk)) { + dev_err(&pdev->dev, "failed to get tsadc pclk\n"); + return PTR_ERR(data->pclk); + } + + /** + * Use a default of 10KHz for the converter clock. + * This may become user-configurable in the future. + * Need to judge the data->clk is Divided by xin32k. + * Need to retry it if the pmic hasn't output the xin32k. + */ + if (clk_get_rate(data->clk) == 0) + return -EPROBE_DEFER; + ret = clk_set_rate(data->clk, 10000); + if (ret < 0) { + dev_err(&pdev->dev, "failed to set tsadc clk rate, %d\n", ret); + return ret; + } + + ret = clk_prepare_enable(data->clk); + if (ret < 0) { + dev_err(&pdev->dev, "failed to enable converter clock\n"); + goto err_clk; + } + + ret = clk_prepare_enable(data->pclk); + if (ret < 0) { + dev_err(&pdev->dev, "failed to enable pclk\n"); + goto err_pclk; + } + + cpumask_set_cpu(0, &clip_cpus); + data->cdev = of_cpufreq_cooling_register(np, &clip_cpus); + if (IS_ERR(data->cdev)) { + dev_err(&pdev->dev, "failed to register cpufreq cooling device\n"); + goto disable_clk; + } + + data->irq = platform_get_irq(pdev, 0); + if (data->irq < 0) { + dev_err(&pdev->dev, "no irq resource?\n"); + goto disable_clk; + } + + ret = devm_request_threaded_irq(&pdev->dev, data->irq, NULL, + &rockchip_thermal_alarm_irq_thread, + IRQF_ONESHOT, "rockchip_thermal", + data); + if (ret < 0) { + dev_err(&pdev->dev, + "failed to request tsadc irq: %d\n", ret); + goto disable_clk; + } + + ret = rockchip_configure_from_dt(&pdev->dev, np, data); + if (ret) + dev_err(&pdev->dev, "Parsing device tree data error.\n"); + + /* The system three Teperture Sensors be registered */ + for (chn = RESERVE; chn < SENSOR_ID_END; chn++) { + data->chn = chn; + + data->tz[chn] = thermal_zone_of_sensor_register( + &pdev->dev, data->chn, + data, rockchip_thermal_get_temp, + NULL, + rockchip_thermal_set_trips); + if (IS_ERR(data->tz[chn])) { + err = PTR_ERR(data->tz[chn]); + dev_err(&pdev->dev, "failed to register sensor: %d\n", + err); + chn--; + goto unregister_tzs; + } + + platform_set_drvdata(pdev, data); + + rockchip_thermal_initialize(data); + rockchip_thermal_control(data, true); + } + return 0; + +unregister_tzs: + for (; chn >= RESERVE; chn--) + thermal_zone_of_sensor_unregister(&pdev->dev, data->tz[chn]); + cpufreq_cooling_unregister(data->cdev); + +disable_clk: +err_pclk: + clk_disable_unprepare(data->pclk); +err_clk: + clk_disable_unprepare(data->clk); + + return ret; +} + +static int rockchip_thermal_remove(struct platform_device *pdev) +{ + struct rockchip_thermal_data *data = platform_get_drvdata(pdev); + int chn; + + rockchip_thermal_control(data, false); + + for (; chn >= RESERVE; chn--) + thermal_zone_of_sensor_unregister(&pdev->dev, data->tz[chn]); + cpufreq_cooling_unregister(data->cdev); + + clk_disable_unprepare(data->clk); + clk_disable_unprepare(data->pclk); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int rockchip_thermal_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rockchip_thermal_data *data = platform_get_drvdata(pdev); + + rockchip_thermal_control(data, false); + + clk_disable_unprepare(data->clk); + clk_disable_unprepare(data->pclk); + + return 0; +} + +static int rockchip_thermal_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct rockchip_thermal_data *data = platform_get_drvdata(pdev); + int ret; + + ret = clk_prepare_enable(data->pclk); + if (ret) + return ret; + + ret = clk_prepare_enable(data->clk); + if (ret) + return ret; + + rockchip_thermal_initialize(data); + rockchip_thermal_control(data, true); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops, + rockchip_thermal_suspend, rockchip_thermal_resume); + +static struct platform_driver rockchip_thermal_driver = { + .driver = { + .name = "rockchip-thermal", + .owner = THIS_MODULE, + .pm = &rockchip_thermal_pm_ops, + .of_match_table = of_rockchip_thermal_match, + }, + .probe = rockchip_thermal_probe, + .remove = rockchip_thermal_remove, +}; + +module_platform_driver(rockchip_thermal_driver); + +MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver"); +MODULE_AUTHOR("Rockchip, Inc."); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:rockchip-thermal");