| Message ID | 1412000251-1571-1-git-send-email-mikko.perttunen@kapsi.fi (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Eduardo Valentin |
| Headers | show |
Eduardo: ping Cheers, Mikko On 09/29/2014 05:17 PM, Mikko Perttunen wrote: > From: Mikko Perttunen <mperttunen@nvidia.com> > > This adds support for the Tegra SOCTHERM thermal sensing and management > system found in the Tegra124 system-on-chip. This initial driver supports > temperature polling for four thermal zones. > > Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> > --- > v7: bunch of style fixes > > drivers/thermal/Kconfig | 10 + > drivers/thermal/Makefile | 1 + > drivers/thermal/tegra_soctherm.c | 473 +++++++++++++++++++++++++++++++++++++++ > 3 files changed, 484 insertions(+) > create mode 100644 drivers/thermal/tegra_soctherm.c > > diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig > index 693208e..fd9d049 100644 > --- a/drivers/thermal/Kconfig > +++ b/drivers/thermal/Kconfig > @@ -175,6 +175,16 @@ config ARMADA_THERMAL > Enable this option if you want to have support for thermal management > controller present in Armada 370 and Armada XP SoC. > > +config TEGRA_SOCTHERM > + tristate "Tegra SOCTHERM thermal management" > + depends on ARCH_TEGRA > + help > + Enable this option for integrated thermal management support on NVIDIA > + Tegra124 systems-on-chip. The driver supports four thermal zones > + (CPU, GPU, MEM, PLLX). Cooling devices can be bound to the thermal > + zones to manage temperatures. This option is also required for the > + emergency thermal reset (thermtrip) feature to function. > + > config DB8500_CPUFREQ_COOLING > tristate "DB8500 cpufreq cooling" > depends on ARCH_U8500 > diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile > index 31e232f..f0b94d5 100644 > --- a/drivers/thermal/Makefile > +++ b/drivers/thermal/Makefile > @@ -33,3 +33,4 @@ obj-$(CONFIG_INTEL_SOC_DTS_THERMAL) += intel_soc_dts_thermal.o > obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/ > obj-$(CONFIG_ACPI_INT3403_THERMAL) += int3403_thermal.o > obj-$(CONFIG_ST_THERMAL) += st/ > +obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o > diff --git a/drivers/thermal/tegra_soctherm.c b/drivers/thermal/tegra_soctherm.c > new file mode 100644 > index 0000000..70f7e9e > --- /dev/null > +++ b/drivers/thermal/tegra_soctherm.c > @@ -0,0 +1,473 @@ > +/* > + * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. > + * > + * Author: > + * Mikko Perttunen <mperttunen@nvidia.com> > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * This program is distributed in the hope that 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/bitops.h> > +#include <linux/clk.h> > +#include <linux/delay.h> > +#include <linux/err.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/platform_device.h> > +#include <linux/reset.h> > +#include <linux/thermal.h> > + > +#include <soc/tegra/fuse.h> > + > +#define SENSOR_CONFIG0 0 > +#define SENSOR_CONFIG0_STOP BIT(0) > +#define SENSOR_CONFIG0_TALL_SHIFT 8 > +#define SENSOR_CONFIG0_TCALC_OVER BIT(4) > +#define SENSOR_CONFIG0_OVER BIT(3) > +#define SENSOR_CONFIG0_CPTR_OVER BIT(2) > + > +#define SENSOR_CONFIG1 4 > +#define SENSOR_CONFIG1_TSAMPLE_SHIFT 0 > +#define SENSOR_CONFIG1_TIDDQ_EN_SHIFT 15 > +#define SENSOR_CONFIG1_TEN_COUNT_SHIFT 24 > +#define SENSOR_CONFIG1_TEMP_ENABLE BIT(31) > + > +#define SENSOR_CONFIG2 8 > +#define SENSOR_CONFIG2_THERMA_SHIFT 16 > +#define SENSOR_CONFIG2_THERMB_SHIFT 0 > + > +#define SENSOR_PDIV 0x1c0 > +#define SENSOR_PDIV_T124 0x8888 > +#define SENSOR_HOTSPOT_OFF 0x1c4 > +#define SENSOR_HOTSPOT_OFF_T124 0x00060600 > +#define SENSOR_TEMP1 0x1c8 > +#define SENSOR_TEMP2 0x1cc > + > +#define SENSOR_TEMP_MASK 0xffff > +#define READBACK_VALUE_MASK 0xff00 > +#define READBACK_VALUE_SHIFT 8 > +#define READBACK_ADD_HALF BIT(7) > +#define READBACK_NEGATE BIT(1) > + > +#define FUSE_TSENSOR8_CALIB 0x180 > +#define FUSE_SPARE_REALIGNMENT_REG_0 0x1fc > + > +#define FUSE_TSENSOR_CALIB_CP_TS_BASE_MASK 0x1fff > +#define FUSE_TSENSOR_CALIB_FT_TS_BASE_MASK (0x1fff << 13) > +#define FUSE_TSENSOR_CALIB_FT_TS_BASE_SHIFT 13 > + > +#define FUSE_TSENSOR8_CALIB_CP_TS_BASE_MASK 0x3ff > +#define FUSE_TSENSOR8_CALIB_FT_TS_BASE_MASK (0x7ff << 10) > +#define FUSE_TSENSOR8_CALIB_FT_TS_BASE_SHIFT 10 > + > +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_CP_MASK 0x3f > +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_MASK (0x1f << 21) > +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_SHIFT 21 > + > +#define NOMINAL_CALIB_FT_T124 105 > +#define NOMINAL_CALIB_CP_T124 25 > + > +struct tegra_tsensor_configuration { > + u32 tall, tsample, tiddq_en, ten_count, pdiv, tsample_ate, pdiv_ate; > +}; > + > +struct tegra_tsensor { > + const struct tegra_tsensor_configuration *config; > + u32 base, calib_fuse_offset; > + /* Correction values used to modify values read from calibration fuses */ > + s32 fuse_corr_alpha, fuse_corr_beta; > +}; > + > +struct tegra_thermctl_zone { > + void __iomem *reg; > + unsigned int shift; > +}; > + > +static const struct tegra_tsensor_configuration t124_tsensor_config = { > + .tall = 16300, > + .tsample = 120, > + .tiddq_en = 1, > + .ten_count = 1, > + .pdiv = 8, > + .tsample_ate = 480, > + .pdiv_ate = 8 > +}; > + > +static const struct tegra_tsensor t124_tsensors[] = { > + { > + .config = &t124_tsensor_config, > + .base = 0xc0, > + .calib_fuse_offset = 0x098, > + .fuse_corr_alpha = 1135400, > + .fuse_corr_beta = -6266900, > + }, > + { > + .config = &t124_tsensor_config, > + .base = 0xe0, > + .calib_fuse_offset = 0x084, > + .fuse_corr_alpha = 1122220, > + .fuse_corr_beta = -5700700, > + }, > + { > + .config = &t124_tsensor_config, > + .base = 0x100, > + .calib_fuse_offset = 0x088, > + .fuse_corr_alpha = 1127000, > + .fuse_corr_beta = -6768200, > + }, > + { > + .config = &t124_tsensor_config, > + .base = 0x120, > + .calib_fuse_offset = 0x12c, > + .fuse_corr_alpha = 1110900, > + .fuse_corr_beta = -6232000, > + }, > + { > + .config = &t124_tsensor_config, > + .base = 0x140, > + .calib_fuse_offset = 0x158, > + .fuse_corr_alpha = 1122300, > + .fuse_corr_beta = -5936400, > + }, > + { > + .config = &t124_tsensor_config, > + .base = 0x160, > + .calib_fuse_offset = 0x15c, > + .fuse_corr_alpha = 1145700, > + .fuse_corr_beta = -7124600, > + }, > + { > + .config = &t124_tsensor_config, > + .base = 0x180, > + .calib_fuse_offset = 0x154, > + .fuse_corr_alpha = 1120100, > + .fuse_corr_beta = -6000500, > + }, > + { > + .config = &t124_tsensor_config, > + .base = 0x1a0, > + .calib_fuse_offset = 0x160, > + .fuse_corr_alpha = 1106500, > + .fuse_corr_beta = -6729300, > + }, > +}; > + > +struct tegra_soctherm { > + struct reset_control *reset; > + struct clk *clock_tsensor; > + struct clk *clock_soctherm; > + void __iomem *regs; > + > + struct thermal_zone_device *thermctl_tzs[4]; > +}; > + > +struct tsensor_shared_calibration { > + u32 base_cp, base_ft; > + u32 actual_temp_cp, actual_temp_ft; > +}; > + > +static int calculate_shared_calibration(struct tsensor_shared_calibration *r) > +{ > + u32 val, shifted_cp, shifted_ft; > + int err; > + > + err = tegra_fuse_readl(FUSE_TSENSOR8_CALIB, &val); > + if (err) > + return err; > + r->base_cp = val & FUSE_TSENSOR8_CALIB_CP_TS_BASE_MASK; > + r->base_ft = (val & FUSE_TSENSOR8_CALIB_FT_TS_BASE_MASK) > + >> FUSE_TSENSOR8_CALIB_FT_TS_BASE_SHIFT; > + val = ((val & FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_MASK) > + >> FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_SHIFT); > + shifted_ft = sign_extend32(val, 4); > + > + err = tegra_fuse_readl(FUSE_SPARE_REALIGNMENT_REG_0, &val); > + if (err) > + return err; > + shifted_cp = sign_extend32(val, 5); > + > + r->actual_temp_cp = 2 * NOMINAL_CALIB_CP_T124 + shifted_cp; > + r->actual_temp_ft = 2 * NOMINAL_CALIB_FT_T124 + shifted_ft; > + > + return 0; > +} > + > +static s64 div64_s64_precise(s64 a, s64 b) > +{ > + s64 r, al; > + > + /* Scale up for increased precision division */ > + al = a << 16; > + > + r = div64_s64(al * 2 + 1, 2 * b); > + return r >> 16; > +} > + > +static int > +calculate_tsensor_calibration(const struct tegra_tsensor *sensor, > + const struct tsensor_shared_calibration *shared, > + u32 *calib) > +{ > + u32 val; > + s32 actual_tsensor_ft, actual_tsensor_cp, delta_sens, delta_temp, > + mult, div; > + s16 therma, thermb; > + s64 tmp; > + int err; > + > + err = tegra_fuse_readl(sensor->calib_fuse_offset, &val); > + if (err) > + return err; > + > + actual_tsensor_cp = (shared->base_cp * 64) + sign_extend32(val, 12); > + val = (val & FUSE_TSENSOR_CALIB_FT_TS_BASE_MASK) > + >> FUSE_TSENSOR_CALIB_FT_TS_BASE_SHIFT; > + actual_tsensor_ft = (shared->base_ft * 32) + sign_extend32(val, 12); > + > + delta_sens = actual_tsensor_ft - actual_tsensor_cp; > + delta_temp = shared->actual_temp_ft - shared->actual_temp_cp; > + > + mult = sensor->config->pdiv * sensor->config->tsample_ate; > + div = sensor->config->tsample * sensor->config->pdiv_ate; > + > + therma = div64_s64_precise((s64) delta_temp * (1LL << 13) * mult, > + (s64) delta_sens * div); > + > + tmp = (s64)actual_tsensor_ft * shared->actual_temp_cp - > + (s64)actual_tsensor_cp * shared->actual_temp_ft; > + thermb = div64_s64_precise(tmp, (s64)delta_sens); > + > + therma = div64_s64_precise((s64)therma * sensor->fuse_corr_alpha, > + (s64)1000000LL); > + thermb = div64_s64_precise((s64)thermb * sensor->fuse_corr_alpha + > + sensor->fuse_corr_beta, (s64)1000000LL); > + > + *calib = ((u16)therma << SENSOR_CONFIG2_THERMA_SHIFT) | > + ((u16)thermb << SENSOR_CONFIG2_THERMB_SHIFT); > + > + return 0; > +} > + > +static int enable_tsensor(struct tegra_soctherm *tegra, > + const struct tegra_tsensor *sensor, > + const struct tsensor_shared_calibration *shared) > +{ > + void __iomem *base = tegra->regs + sensor->base; > + unsigned int val; > + u32 calib; > + int err; > + > + err = calculate_tsensor_calibration(sensor, shared, &calib); > + if (err) > + return err; > + > + val = sensor->config->tall << SENSOR_CONFIG0_TALL_SHIFT; > + writel(val, base + SENSOR_CONFIG0); > + > + val = (sensor->config->tsample - 1) << SENSOR_CONFIG1_TSAMPLE_SHIFT; > + val |= sensor->config->tiddq_en << SENSOR_CONFIG1_TIDDQ_EN_SHIFT; > + val |= sensor->config->ten_count << SENSOR_CONFIG1_TEN_COUNT_SHIFT; > + val |= SENSOR_CONFIG1_TEMP_ENABLE; > + writel(val, base + SENSOR_CONFIG1); > + > + writel(calib, base + SENSOR_CONFIG2); > + > + return 0; > +} > + > +/* > + * Translate from soctherm readback format to millicelsius. > + * The soctherm readback format in bits is as follows: > + * TTTTTTTT H______N > + * where T's contain the temperature in Celsius, > + * H denotes an addition of 0.5 Celsius and N denotes negation > + * of the final value. > + */ > +static long translate_temp(u16 val) > +{ > + long t; > + > + t = ((val & READBACK_VALUE_MASK) >> READBACK_VALUE_SHIFT) * 1000; > + if (val & READBACK_ADD_HALF) > + t += 500; > + if (val & READBACK_NEGATE) > + t *= -1; > + > + return t; > +} > + > +static int tegra_thermctl_get_temp(void *data, long *out_temp) > +{ > + struct tegra_thermctl_zone *zone = data; > + u32 val; > + > + val = (readl(zone->reg) >> zone->shift) & SENSOR_TEMP_MASK; > + *out_temp = translate_temp(val); > + > + return 0; > +} > + > +static const struct of_device_id tegra_soctherm_of_match[] = { > + { .compatible = "nvidia,tegra124-soctherm" }, > + { }, > +}; > +MODULE_DEVICE_TABLE(of, tegra_soctherm_of_match); > + > +struct thermctl_zone_desc { > + unsigned int offset; > + unsigned int shift; > +}; > + > +static const struct thermctl_zone_desc t124_thermctl_temp_zones[] = { > + { SENSOR_TEMP1, 16 }, > + { SENSOR_TEMP2, 16 }, > + { SENSOR_TEMP1, 0 }, > + { SENSOR_TEMP2, 0 } > +}; > + > +static int tegra_soctherm_probe(struct platform_device *pdev) > +{ > + struct tegra_soctherm *tegra; > + struct thermal_zone_device *tz; > + struct tsensor_shared_calibration shared_calib; > + struct resource *res; > + unsigned int i; > + int err; > + > + const struct tegra_tsensor *tsensors = t124_tsensors; > + > + tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); > + if (!tegra) > + return -ENOMEM; > + > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > + tegra->regs = devm_ioremap_resource(&pdev->dev, res); > + if (IS_ERR(tegra->regs)) > + return PTR_ERR(tegra->regs); > + > + tegra->reset = devm_reset_control_get(&pdev->dev, "soctherm"); > + if (IS_ERR(tegra->reset)) { > + dev_err(&pdev->dev, "can't get soctherm reset\n"); > + return PTR_ERR(tegra->reset); > + } > + > + tegra->clock_tsensor = devm_clk_get(&pdev->dev, "tsensor"); > + if (IS_ERR(tegra->clock_tsensor)) { > + dev_err(&pdev->dev, "can't get tsensor clock\n"); > + return PTR_ERR(tegra->clock_tsensor); > + } > + > + tegra->clock_soctherm = devm_clk_get(&pdev->dev, "soctherm"); > + if (IS_ERR(tegra->clock_soctherm)) { > + dev_err(&pdev->dev, "can't get soctherm clock\n"); > + return PTR_ERR(tegra->clock_soctherm); > + } > + > + reset_control_assert(tegra->reset); > + > + err = clk_prepare_enable(tegra->clock_soctherm); > + if (err) > + return err; > + > + err = clk_prepare_enable(tegra->clock_tsensor); > + if (err) { > + clk_disable_unprepare(tegra->clock_soctherm); > + return err; > + } > + > + reset_control_deassert(tegra->reset); > + > + /* Initialize raw sensors */ > + > + err = calculate_shared_calibration(&shared_calib); > + if (err) > + goto disable_clocks; > + > + for (i = 0; i < ARRAY_SIZE(t124_tsensors); ++i) { > + err = enable_tsensor(tegra, tsensors + i, &shared_calib); > + if (err) > + goto disable_clocks; > + } > + > + writel(SENSOR_PDIV_T124, tegra->regs + SENSOR_PDIV); > + writel(SENSOR_HOTSPOT_OFF_T124, tegra->regs + SENSOR_HOTSPOT_OFF); > + > + /* Initialize thermctl sensors */ > + > + for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) { > + struct tegra_thermctl_zone *zone = > + devm_kzalloc(&pdev->dev, sizeof(*zone), GFP_KERNEL); > + if (!zone) { > + err = -ENOMEM; > + goto unregister_tzs; > + } > + > + zone->reg = tegra->regs + t124_thermctl_temp_zones[i].offset; > + zone->shift = t124_thermctl_temp_zones[i].shift; > + > + tz = thermal_zone_of_sensor_register(&pdev->dev, i, zone, > + tegra_thermctl_get_temp, > + NULL); > + if (IS_ERR(tz)) { > + err = PTR_ERR(tz); > + dev_err(&pdev->dev, "failed to register sensor: %d\n", > + err); > + goto unregister_tzs; > + } > + > + tegra->thermctl_tzs[i] = tz; > + } > + > + return 0; > + > +unregister_tzs: > + while (i--) > + thermal_zone_of_sensor_unregister(&pdev->dev, > + tegra->thermctl_tzs[i]); > + > +disable_clocks: > + clk_disable_unprepare(tegra->clock_tsensor); > + clk_disable_unprepare(tegra->clock_soctherm); > + > + return err; > +} > + > +static int tegra_soctherm_remove(struct platform_device *pdev) > +{ > + struct tegra_soctherm *tegra = platform_get_drvdata(pdev); > + unsigned int i; > + > + for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) { > + thermal_zone_of_sensor_unregister(&pdev->dev, > + tegra->thermctl_tzs[i]); > + } > + > + clk_disable_unprepare(tegra->clock_tsensor); > + clk_disable_unprepare(tegra->clock_soctherm); > + > + return 0; > +} > + > +static struct platform_driver tegra_soctherm_driver = { > + .probe = tegra_soctherm_probe, > + .remove = tegra_soctherm_remove, > + .driver = { > + .name = "tegra-soctherm", > + .of_match_table = tegra_soctherm_of_match, > + }, > +}; > +module_platform_driver(tegra_soctherm_driver); > + > +MODULE_AUTHOR("Mikko Perttunen <mperttunen@nvidia.com>"); > +MODULE_DESCRIPTION("NVIDIA Tegra SOCTHERM thermal management driver"); > +MODULE_LICENSE("GPL v2"); > -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Terve Mikko, On Wed, Oct 15, 2014 at 01:05:19PM +0300, Mikko Perttunen wrote: > Eduardo: ping > I had no objections with the driver at this point. Neither with the DT part. I decided to include it in my -linus queue, which means, it will hopefully be queued in the next major merge windown (v3.19). I also merged it to my -next branch, for linux-next testing. > Cheers, > Mikko > > On 09/29/2014 05:17 PM, Mikko Perttunen wrote: > > From: Mikko Perttunen <mperttunen@nvidia.com> BTW, this nvidia address is bouncing. I noticed because my automated 'I applied it on queue xyz' notification message has returned. > > > > This adds support for the Tegra SOCTHERM thermal sensing and management > > system found in the Tegra124 system-on-chip. This initial driver supports > > temperature polling for four thermal zones. > > > > Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> > > --- > > v7: bunch of style fixes > > > > drivers/thermal/Kconfig | 10 + > > drivers/thermal/Makefile | 1 + > > drivers/thermal/tegra_soctherm.c | 473 +++++++++++++++++++++++++++++++++++++++ > > 3 files changed, 484 insertions(+) > > create mode 100644 drivers/thermal/tegra_soctherm.c > > > > diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig > > index 693208e..fd9d049 100644 > > --- a/drivers/thermal/Kconfig > > +++ b/drivers/thermal/Kconfig > > @@ -175,6 +175,16 @@ config ARMADA_THERMAL > > Enable this option if you want to have support for thermal management > > controller present in Armada 370 and Armada XP SoC. > > > > +config TEGRA_SOCTHERM > > + tristate "Tegra SOCTHERM thermal management" > > + depends on ARCH_TEGRA > > + help > > + Enable this option for integrated thermal management support on NVIDIA > > + Tegra124 systems-on-chip. The driver supports four thermal zones > > + (CPU, GPU, MEM, PLLX). Cooling devices can be bound to the thermal > > + zones to manage temperatures. This option is also required for the > > + emergency thermal reset (thermtrip) feature to function. > > + > > config DB8500_CPUFREQ_COOLING > > tristate "DB8500 cpufreq cooling" > > depends on ARCH_U8500 > > diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile > > index 31e232f..f0b94d5 100644 > > --- a/drivers/thermal/Makefile > > +++ b/drivers/thermal/Makefile > > @@ -33,3 +33,4 @@ obj-$(CONFIG_INTEL_SOC_DTS_THERMAL) += intel_soc_dts_thermal.o > > obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/ > > obj-$(CONFIG_ACPI_INT3403_THERMAL) += int3403_thermal.o > > obj-$(CONFIG_ST_THERMAL) += st/ > > +obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o > > diff --git a/drivers/thermal/tegra_soctherm.c b/drivers/thermal/tegra_soctherm.c > > new file mode 100644 > > index 0000000..70f7e9e > > --- /dev/null > > +++ b/drivers/thermal/tegra_soctherm.c > > @@ -0,0 +1,473 @@ > > +/* > > + * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. > > + * > > + * Author: > > + * Mikko Perttunen <mperttunen@nvidia.com> > > + * Might be time to send a patch on top of my -linus queue to update the above with a valid email address. Thanks, > > + * This software is licensed under the terms of the GNU General Public > > + * License version 2, as published by the Free Software Foundation, and > > + * may be copied, distributed, and modified under those terms. > > + * > > + * This program is distributed in the hope that 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/bitops.h> > > +#include <linux/clk.h> > > +#include <linux/delay.h> > > +#include <linux/err.h> > > +#include <linux/interrupt.h> > > +#include <linux/io.h> > > +#include <linux/module.h> > > +#include <linux/of.h> > > +#include <linux/platform_device.h> > > +#include <linux/reset.h> > > +#include <linux/thermal.h> > > + > > +#include <soc/tegra/fuse.h> > > + > > +#define SENSOR_CONFIG0 0 > > +#define SENSOR_CONFIG0_STOP BIT(0) > > +#define SENSOR_CONFIG0_TALL_SHIFT 8 > > +#define SENSOR_CONFIG0_TCALC_OVER BIT(4) > > +#define SENSOR_CONFIG0_OVER BIT(3) > > +#define SENSOR_CONFIG0_CPTR_OVER BIT(2) > > + > > +#define SENSOR_CONFIG1 4 > > +#define SENSOR_CONFIG1_TSAMPLE_SHIFT 0 > > +#define SENSOR_CONFIG1_TIDDQ_EN_SHIFT 15 > > +#define SENSOR_CONFIG1_TEN_COUNT_SHIFT 24 > > +#define SENSOR_CONFIG1_TEMP_ENABLE BIT(31) > > + > > +#define SENSOR_CONFIG2 8 > > +#define SENSOR_CONFIG2_THERMA_SHIFT 16 > > +#define SENSOR_CONFIG2_THERMB_SHIFT 0 > > + > > +#define SENSOR_PDIV 0x1c0 > > +#define SENSOR_PDIV_T124 0x8888 > > +#define SENSOR_HOTSPOT_OFF 0x1c4 > > +#define SENSOR_HOTSPOT_OFF_T124 0x00060600 > > +#define SENSOR_TEMP1 0x1c8 > > +#define SENSOR_TEMP2 0x1cc > > + > > +#define SENSOR_TEMP_MASK 0xffff > > +#define READBACK_VALUE_MASK 0xff00 > > +#define READBACK_VALUE_SHIFT 8 > > +#define READBACK_ADD_HALF BIT(7) > > +#define READBACK_NEGATE BIT(1) > > + > > +#define FUSE_TSENSOR8_CALIB 0x180 > > +#define FUSE_SPARE_REALIGNMENT_REG_0 0x1fc > > + > > +#define FUSE_TSENSOR_CALIB_CP_TS_BASE_MASK 0x1fff > > +#define FUSE_TSENSOR_CALIB_FT_TS_BASE_MASK (0x1fff << 13) > > +#define FUSE_TSENSOR_CALIB_FT_TS_BASE_SHIFT 13 > > + > > +#define FUSE_TSENSOR8_CALIB_CP_TS_BASE_MASK 0x3ff > > +#define FUSE_TSENSOR8_CALIB_FT_TS_BASE_MASK (0x7ff << 10) > > +#define FUSE_TSENSOR8_CALIB_FT_TS_BASE_SHIFT 10 > > + > > +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_CP_MASK 0x3f > > +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_MASK (0x1f << 21) > > +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_SHIFT 21 > > + > > +#define NOMINAL_CALIB_FT_T124 105 > > +#define NOMINAL_CALIB_CP_T124 25 > > + > > +struct tegra_tsensor_configuration { > > + u32 tall, tsample, tiddq_en, ten_count, pdiv, tsample_ate, pdiv_ate; > > +}; > > + > > +struct tegra_tsensor { > > + const struct tegra_tsensor_configuration *config; > > + u32 base, calib_fuse_offset; > > + /* Correction values used to modify values read from calibration fuses */ > > + s32 fuse_corr_alpha, fuse_corr_beta; > > +}; > > + > > +struct tegra_thermctl_zone { > > + void __iomem *reg; > > + unsigned int shift; > > +}; > > + > > +static const struct tegra_tsensor_configuration t124_tsensor_config = { > > + .tall = 16300, > > + .tsample = 120, > > + .tiddq_en = 1, > > + .ten_count = 1, > > + .pdiv = 8, > > + .tsample_ate = 480, > > + .pdiv_ate = 8 > > +}; > > + > > +static const struct tegra_tsensor t124_tsensors[] = { > > + { > > + .config = &t124_tsensor_config, > > + .base = 0xc0, > > + .calib_fuse_offset = 0x098, > > + .fuse_corr_alpha = 1135400, > > + .fuse_corr_beta = -6266900, > > + }, > > + { > > + .config = &t124_tsensor_config, > > + .base = 0xe0, > > + .calib_fuse_offset = 0x084, > > + .fuse_corr_alpha = 1122220, > > + .fuse_corr_beta = -5700700, > > + }, > > + { > > + .config = &t124_tsensor_config, > > + .base = 0x100, > > + .calib_fuse_offset = 0x088, > > + .fuse_corr_alpha = 1127000, > > + .fuse_corr_beta = -6768200, > > + }, > > + { > > + .config = &t124_tsensor_config, > > + .base = 0x120, > > + .calib_fuse_offset = 0x12c, > > + .fuse_corr_alpha = 1110900, > > + .fuse_corr_beta = -6232000, > > + }, > > + { > > + .config = &t124_tsensor_config, > > + .base = 0x140, > > + .calib_fuse_offset = 0x158, > > + .fuse_corr_alpha = 1122300, > > + .fuse_corr_beta = -5936400, > > + }, > > + { > > + .config = &t124_tsensor_config, > > + .base = 0x160, > > + .calib_fuse_offset = 0x15c, > > + .fuse_corr_alpha = 1145700, > > + .fuse_corr_beta = -7124600, > > + }, > > + { > > + .config = &t124_tsensor_config, > > + .base = 0x180, > > + .calib_fuse_offset = 0x154, > > + .fuse_corr_alpha = 1120100, > > + .fuse_corr_beta = -6000500, > > + }, > > + { > > + .config = &t124_tsensor_config, > > + .base = 0x1a0, > > + .calib_fuse_offset = 0x160, > > + .fuse_corr_alpha = 1106500, > > + .fuse_corr_beta = -6729300, > > + }, > > +}; > > + > > +struct tegra_soctherm { > > + struct reset_control *reset; > > + struct clk *clock_tsensor; > > + struct clk *clock_soctherm; > > + void __iomem *regs; > > + > > + struct thermal_zone_device *thermctl_tzs[4]; > > +}; > > + > > +struct tsensor_shared_calibration { > > + u32 base_cp, base_ft; > > + u32 actual_temp_cp, actual_temp_ft; > > +}; > > + > > +static int calculate_shared_calibration(struct tsensor_shared_calibration *r) > > +{ > > + u32 val, shifted_cp, shifted_ft; > > + int err; > > + > > + err = tegra_fuse_readl(FUSE_TSENSOR8_CALIB, &val); > > + if (err) > > + return err; > > + r->base_cp = val & FUSE_TSENSOR8_CALIB_CP_TS_BASE_MASK; > > + r->base_ft = (val & FUSE_TSENSOR8_CALIB_FT_TS_BASE_MASK) > > + >> FUSE_TSENSOR8_CALIB_FT_TS_BASE_SHIFT; > > + val = ((val & FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_MASK) > > + >> FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_SHIFT); > > + shifted_ft = sign_extend32(val, 4); > > + > > + err = tegra_fuse_readl(FUSE_SPARE_REALIGNMENT_REG_0, &val); > > + if (err) > > + return err; > > + shifted_cp = sign_extend32(val, 5); > > + > > + r->actual_temp_cp = 2 * NOMINAL_CALIB_CP_T124 + shifted_cp; > > + r->actual_temp_ft = 2 * NOMINAL_CALIB_FT_T124 + shifted_ft; > > + > > + return 0; > > +} > > + > > +static s64 div64_s64_precise(s64 a, s64 b) > > +{ > > + s64 r, al; > > + > > + /* Scale up for increased precision division */ > > + al = a << 16; > > + > > + r = div64_s64(al * 2 + 1, 2 * b); > > + return r >> 16; > > +} > > + > > +static int > > +calculate_tsensor_calibration(const struct tegra_tsensor *sensor, > > + const struct tsensor_shared_calibration *shared, > > + u32 *calib) > > +{ > > + u32 val; > > + s32 actual_tsensor_ft, actual_tsensor_cp, delta_sens, delta_temp, > > + mult, div; > > + s16 therma, thermb; > > + s64 tmp; > > + int err; > > + > > + err = tegra_fuse_readl(sensor->calib_fuse_offset, &val); > > + if (err) > > + return err; > > + > > + actual_tsensor_cp = (shared->base_cp * 64) + sign_extend32(val, 12); > > + val = (val & FUSE_TSENSOR_CALIB_FT_TS_BASE_MASK) > > + >> FUSE_TSENSOR_CALIB_FT_TS_BASE_SHIFT; > > + actual_tsensor_ft = (shared->base_ft * 32) + sign_extend32(val, 12); > > + > > + delta_sens = actual_tsensor_ft - actual_tsensor_cp; > > + delta_temp = shared->actual_temp_ft - shared->actual_temp_cp; > > + > > + mult = sensor->config->pdiv * sensor->config->tsample_ate; > > + div = sensor->config->tsample * sensor->config->pdiv_ate; > > + > > + therma = div64_s64_precise((s64) delta_temp * (1LL << 13) * mult, > > + (s64) delta_sens * div); > > + > > + tmp = (s64)actual_tsensor_ft * shared->actual_temp_cp - > > + (s64)actual_tsensor_cp * shared->actual_temp_ft; > > + thermb = div64_s64_precise(tmp, (s64)delta_sens); > > + > > + therma = div64_s64_precise((s64)therma * sensor->fuse_corr_alpha, > > + (s64)1000000LL); > > + thermb = div64_s64_precise((s64)thermb * sensor->fuse_corr_alpha + > > + sensor->fuse_corr_beta, (s64)1000000LL); > > + > > + *calib = ((u16)therma << SENSOR_CONFIG2_THERMA_SHIFT) | > > + ((u16)thermb << SENSOR_CONFIG2_THERMB_SHIFT); > > + > > + return 0; > > +} > > + > > +static int enable_tsensor(struct tegra_soctherm *tegra, > > + const struct tegra_tsensor *sensor, > > + const struct tsensor_shared_calibration *shared) > > +{ > > + void __iomem *base = tegra->regs + sensor->base; > > + unsigned int val; > > + u32 calib; > > + int err; > > + > > + err = calculate_tsensor_calibration(sensor, shared, &calib); > > + if (err) > > + return err; > > + > > + val = sensor->config->tall << SENSOR_CONFIG0_TALL_SHIFT; > > + writel(val, base + SENSOR_CONFIG0); > > + > > + val = (sensor->config->tsample - 1) << SENSOR_CONFIG1_TSAMPLE_SHIFT; > > + val |= sensor->config->tiddq_en << SENSOR_CONFIG1_TIDDQ_EN_SHIFT; > > + val |= sensor->config->ten_count << SENSOR_CONFIG1_TEN_COUNT_SHIFT; > > + val |= SENSOR_CONFIG1_TEMP_ENABLE; > > + writel(val, base + SENSOR_CONFIG1); > > + > > + writel(calib, base + SENSOR_CONFIG2); > > + > > + return 0; > > +} > > + > > +/* > > + * Translate from soctherm readback format to millicelsius. > > + * The soctherm readback format in bits is as follows: > > + * TTTTTTTT H______N > > + * where T's contain the temperature in Celsius, > > + * H denotes an addition of 0.5 Celsius and N denotes negation > > + * of the final value. > > + */ > > +static long translate_temp(u16 val) > > +{ > > + long t; > > + > > + t = ((val & READBACK_VALUE_MASK) >> READBACK_VALUE_SHIFT) * 1000; > > + if (val & READBACK_ADD_HALF) > > + t += 500; > > + if (val & READBACK_NEGATE) > > + t *= -1; > > + > > + return t; > > +} > > + > > +static int tegra_thermctl_get_temp(void *data, long *out_temp) > > +{ > > + struct tegra_thermctl_zone *zone = data; > > + u32 val; > > + > > + val = (readl(zone->reg) >> zone->shift) & SENSOR_TEMP_MASK; > > + *out_temp = translate_temp(val); > > + > > + return 0; > > +} > > + > > +static const struct of_device_id tegra_soctherm_of_match[] = { > > + { .compatible = "nvidia,tegra124-soctherm" }, > > + { }, > > +}; > > +MODULE_DEVICE_TABLE(of, tegra_soctherm_of_match); > > + > > +struct thermctl_zone_desc { > > + unsigned int offset; > > + unsigned int shift; > > +}; > > + > > +static const struct thermctl_zone_desc t124_thermctl_temp_zones[] = { > > + { SENSOR_TEMP1, 16 }, > > + { SENSOR_TEMP2, 16 }, > > + { SENSOR_TEMP1, 0 }, > > + { SENSOR_TEMP2, 0 } > > +}; > > + > > +static int tegra_soctherm_probe(struct platform_device *pdev) > > +{ > > + struct tegra_soctherm *tegra; > > + struct thermal_zone_device *tz; > > + struct tsensor_shared_calibration shared_calib; > > + struct resource *res; > > + unsigned int i; > > + int err; > > + > > + const struct tegra_tsensor *tsensors = t124_tsensors; > > + > > + tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); > > + if (!tegra) > > + return -ENOMEM; > > + > > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); > > + tegra->regs = devm_ioremap_resource(&pdev->dev, res); > > + if (IS_ERR(tegra->regs)) > > + return PTR_ERR(tegra->regs); > > + > > + tegra->reset = devm_reset_control_get(&pdev->dev, "soctherm"); > > + if (IS_ERR(tegra->reset)) { > > + dev_err(&pdev->dev, "can't get soctherm reset\n"); > > + return PTR_ERR(tegra->reset); > > + } > > + > > + tegra->clock_tsensor = devm_clk_get(&pdev->dev, "tsensor"); > > + if (IS_ERR(tegra->clock_tsensor)) { > > + dev_err(&pdev->dev, "can't get tsensor clock\n"); > > + return PTR_ERR(tegra->clock_tsensor); > > + } > > + > > + tegra->clock_soctherm = devm_clk_get(&pdev->dev, "soctherm"); > > + if (IS_ERR(tegra->clock_soctherm)) { > > + dev_err(&pdev->dev, "can't get soctherm clock\n"); > > + return PTR_ERR(tegra->clock_soctherm); > > + } > > + > > + reset_control_assert(tegra->reset); > > + > > + err = clk_prepare_enable(tegra->clock_soctherm); > > + if (err) > > + return err; > > + > > + err = clk_prepare_enable(tegra->clock_tsensor); > > + if (err) { > > + clk_disable_unprepare(tegra->clock_soctherm); > > + return err; > > + } > > + > > + reset_control_deassert(tegra->reset); > > + > > + /* Initialize raw sensors */ > > + > > + err = calculate_shared_calibration(&shared_calib); > > + if (err) > > + goto disable_clocks; > > + > > + for (i = 0; i < ARRAY_SIZE(t124_tsensors); ++i) { > > + err = enable_tsensor(tegra, tsensors + i, &shared_calib); > > + if (err) > > + goto disable_clocks; > > + } > > + > > + writel(SENSOR_PDIV_T124, tegra->regs + SENSOR_PDIV); > > + writel(SENSOR_HOTSPOT_OFF_T124, tegra->regs + SENSOR_HOTSPOT_OFF); > > + > > + /* Initialize thermctl sensors */ > > + > > + for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) { > > + struct tegra_thermctl_zone *zone = > > + devm_kzalloc(&pdev->dev, sizeof(*zone), GFP_KERNEL); > > + if (!zone) { > > + err = -ENOMEM; > > + goto unregister_tzs; > > + } > > + > > + zone->reg = tegra->regs + t124_thermctl_temp_zones[i].offset; > > + zone->shift = t124_thermctl_temp_zones[i].shift; > > + > > + tz = thermal_zone_of_sensor_register(&pdev->dev, i, zone, > > + tegra_thermctl_get_temp, > > + NULL); > > + if (IS_ERR(tz)) { > > + err = PTR_ERR(tz); > > + dev_err(&pdev->dev, "failed to register sensor: %d\n", > > + err); > > + goto unregister_tzs; > > + } > > + > > + tegra->thermctl_tzs[i] = tz; > > + } > > + > > + return 0; > > + > > +unregister_tzs: > > + while (i--) > > + thermal_zone_of_sensor_unregister(&pdev->dev, > > + tegra->thermctl_tzs[i]); > > + > > +disable_clocks: > > + clk_disable_unprepare(tegra->clock_tsensor); > > + clk_disable_unprepare(tegra->clock_soctherm); > > + > > + return err; > > +} > > + > > +static int tegra_soctherm_remove(struct platform_device *pdev) > > +{ > > + struct tegra_soctherm *tegra = platform_get_drvdata(pdev); > > + unsigned int i; > > + > > + for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) { > > + thermal_zone_of_sensor_unregister(&pdev->dev, > > + tegra->thermctl_tzs[i]); > > + } > > + > > + clk_disable_unprepare(tegra->clock_tsensor); > > + clk_disable_unprepare(tegra->clock_soctherm); > > + > > + return 0; > > +} > > + > > +static struct platform_driver tegra_soctherm_driver = { > > + .probe = tegra_soctherm_probe, > > + .remove = tegra_soctherm_remove, > > + .driver = { > > + .name = "tegra-soctherm", > > + .of_match_table = tegra_soctherm_of_match, > > + }, > > +}; > > +module_platform_driver(tegra_soctherm_driver); > > + > > +MODULE_AUTHOR("Mikko Perttunen <mperttunen@nvidia.com>"); > > +MODULE_DESCRIPTION("NVIDIA Tegra SOCTHERM thermal management driver"); > > +MODULE_LICENSE("GPL v2"); > > >
On 11/07/2014 05:54 PM, Eduardo Valentin wrote: > Terve Mikko, > > On Wed, Oct 15, 2014 at 01:05:19PM +0300, Mikko Perttunen wrote: >> Eduardo: ping >> > > > I had no objections with the driver at this point. Neither with the DT > part. I decided to include it in my -linus queue, which means, it will > hopefully be queued in the next major merge windown (v3.19). > > I also merged it to my -next branch, for linux-next testing. Great! Thanks. > > >> Cheers, >> Mikko >> >> On 09/29/2014 05:17 PM, Mikko Perttunen wrote: >>> From: Mikko Perttunen <mperttunen@nvidia.com> > > BTW, this nvidia address is bouncing. I noticed because my automated > 'I applied it on queue xyz' notification message has returned. Yeah, I'm working at NVIDIA only during summer. Looks like this time they decided to deactivate my email there. > >>> >>> This adds support for the Tegra SOCTHERM thermal sensing and management >>> system found in the Tegra124 system-on-chip. This initial driver supports >>> temperature polling for four thermal zones. >>> >>> Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> >>> --- >>> v7: bunch of style fixes >>> >>> drivers/thermal/Kconfig | 10 + >>> drivers/thermal/Makefile | 1 + >>> drivers/thermal/tegra_soctherm.c | 473 +++++++++++++++++++++++++++++++++++++++ >>> 3 files changed, 484 insertions(+) >>> create mode 100644 drivers/thermal/tegra_soctherm.c >>> >>> diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig >>> index 693208e..fd9d049 100644 >>> --- a/drivers/thermal/Kconfig >>> +++ b/drivers/thermal/Kconfig >>> @@ -175,6 +175,16 @@ config ARMADA_THERMAL >>> Enable this option if you want to have support for thermal management >>> controller present in Armada 370 and Armada XP SoC. >>> >>> +config TEGRA_SOCTHERM >>> + tristate "Tegra SOCTHERM thermal management" >>> + depends on ARCH_TEGRA >>> + help >>> + Enable this option for integrated thermal management support on NVIDIA >>> + Tegra124 systems-on-chip. The driver supports four thermal zones >>> + (CPU, GPU, MEM, PLLX). Cooling devices can be bound to the thermal >>> + zones to manage temperatures. This option is also required for the >>> + emergency thermal reset (thermtrip) feature to function. >>> + >>> config DB8500_CPUFREQ_COOLING >>> tristate "DB8500 cpufreq cooling" >>> depends on ARCH_U8500 >>> diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile >>> index 31e232f..f0b94d5 100644 >>> --- a/drivers/thermal/Makefile >>> +++ b/drivers/thermal/Makefile >>> @@ -33,3 +33,4 @@ obj-$(CONFIG_INTEL_SOC_DTS_THERMAL) += intel_soc_dts_thermal.o >>> obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/ >>> obj-$(CONFIG_ACPI_INT3403_THERMAL) += int3403_thermal.o >>> obj-$(CONFIG_ST_THERMAL) += st/ >>> +obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o >>> diff --git a/drivers/thermal/tegra_soctherm.c b/drivers/thermal/tegra_soctherm.c >>> new file mode 100644 >>> index 0000000..70f7e9e >>> --- /dev/null >>> +++ b/drivers/thermal/tegra_soctherm.c >>> @@ -0,0 +1,473 @@ >>> +/* >>> + * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. >>> + * >>> + * Author: >>> + * Mikko Perttunen <mperttunen@nvidia.com> >>> + * > > Might be time to send a patch on top of my -linus queue to update the > above with a valid email address. > > Thanks, > >>> + * This software is licensed under the terms of the GNU General Public >>> + * License version 2, as published by the Free Software Foundation, and >>> + * may be copied, distributed, and modified under those terms. >>> + * >>> + * This program is distributed in the hope that 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/bitops.h> >>> +#include <linux/clk.h> >>> +#include <linux/delay.h> >>> +#include <linux/err.h> >>> +#include <linux/interrupt.h> >>> +#include <linux/io.h> >>> +#include <linux/module.h> >>> +#include <linux/of.h> >>> +#include <linux/platform_device.h> >>> +#include <linux/reset.h> >>> +#include <linux/thermal.h> >>> + >>> +#include <soc/tegra/fuse.h> >>> + >>> +#define SENSOR_CONFIG0 0 >>> +#define SENSOR_CONFIG0_STOP BIT(0) >>> +#define SENSOR_CONFIG0_TALL_SHIFT 8 >>> +#define SENSOR_CONFIG0_TCALC_OVER BIT(4) >>> +#define SENSOR_CONFIG0_OVER BIT(3) >>> +#define SENSOR_CONFIG0_CPTR_OVER BIT(2) >>> + >>> +#define SENSOR_CONFIG1 4 >>> +#define SENSOR_CONFIG1_TSAMPLE_SHIFT 0 >>> +#define SENSOR_CONFIG1_TIDDQ_EN_SHIFT 15 >>> +#define SENSOR_CONFIG1_TEN_COUNT_SHIFT 24 >>> +#define SENSOR_CONFIG1_TEMP_ENABLE BIT(31) >>> + >>> +#define SENSOR_CONFIG2 8 >>> +#define SENSOR_CONFIG2_THERMA_SHIFT 16 >>> +#define SENSOR_CONFIG2_THERMB_SHIFT 0 >>> + >>> +#define SENSOR_PDIV 0x1c0 >>> +#define SENSOR_PDIV_T124 0x8888 >>> +#define SENSOR_HOTSPOT_OFF 0x1c4 >>> +#define SENSOR_HOTSPOT_OFF_T124 0x00060600 >>> +#define SENSOR_TEMP1 0x1c8 >>> +#define SENSOR_TEMP2 0x1cc >>> + >>> +#define SENSOR_TEMP_MASK 0xffff >>> +#define READBACK_VALUE_MASK 0xff00 >>> +#define READBACK_VALUE_SHIFT 8 >>> +#define READBACK_ADD_HALF BIT(7) >>> +#define READBACK_NEGATE BIT(1) >>> + >>> +#define FUSE_TSENSOR8_CALIB 0x180 >>> +#define FUSE_SPARE_REALIGNMENT_REG_0 0x1fc >>> + >>> +#define FUSE_TSENSOR_CALIB_CP_TS_BASE_MASK 0x1fff >>> +#define FUSE_TSENSOR_CALIB_FT_TS_BASE_MASK (0x1fff << 13) >>> +#define FUSE_TSENSOR_CALIB_FT_TS_BASE_SHIFT 13 >>> + >>> +#define FUSE_TSENSOR8_CALIB_CP_TS_BASE_MASK 0x3ff >>> +#define FUSE_TSENSOR8_CALIB_FT_TS_BASE_MASK (0x7ff << 10) >>> +#define FUSE_TSENSOR8_CALIB_FT_TS_BASE_SHIFT 10 >>> + >>> +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_CP_MASK 0x3f >>> +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_MASK (0x1f << 21) >>> +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_SHIFT 21 >>> + >>> +#define NOMINAL_CALIB_FT_T124 105 >>> +#define NOMINAL_CALIB_CP_T124 25 >>> + >>> +struct tegra_tsensor_configuration { >>> + u32 tall, tsample, tiddq_en, ten_count, pdiv, tsample_ate, pdiv_ate; >>> +}; >>> + >>> +struct tegra_tsensor { >>> + const struct tegra_tsensor_configuration *config; >>> + u32 base, calib_fuse_offset; >>> + /* Correction values used to modify values read from calibration fuses */ >>> + s32 fuse_corr_alpha, fuse_corr_beta; >>> +}; >>> + >>> +struct tegra_thermctl_zone { >>> + void __iomem *reg; >>> + unsigned int shift; >>> +}; >>> + >>> +static const struct tegra_tsensor_configuration t124_tsensor_config = { >>> + .tall = 16300, >>> + .tsample = 120, >>> + .tiddq_en = 1, >>> + .ten_count = 1, >>> + .pdiv = 8, >>> + .tsample_ate = 480, >>> + .pdiv_ate = 8 >>> +}; >>> + >>> +static const struct tegra_tsensor t124_tsensors[] = { >>> + { >>> + .config = &t124_tsensor_config, >>> + .base = 0xc0, >>> + .calib_fuse_offset = 0x098, >>> + .fuse_corr_alpha = 1135400, >>> + .fuse_corr_beta = -6266900, >>> + }, >>> + { >>> + .config = &t124_tsensor_config, >>> + .base = 0xe0, >>> + .calib_fuse_offset = 0x084, >>> + .fuse_corr_alpha = 1122220, >>> + .fuse_corr_beta = -5700700, >>> + }, >>> + { >>> + .config = &t124_tsensor_config, >>> + .base = 0x100, >>> + .calib_fuse_offset = 0x088, >>> + .fuse_corr_alpha = 1127000, >>> + .fuse_corr_beta = -6768200, >>> + }, >>> + { >>> + .config = &t124_tsensor_config, >>> + .base = 0x120, >>> + .calib_fuse_offset = 0x12c, >>> + .fuse_corr_alpha = 1110900, >>> + .fuse_corr_beta = -6232000, >>> + }, >>> + { >>> + .config = &t124_tsensor_config, >>> + .base = 0x140, >>> + .calib_fuse_offset = 0x158, >>> + .fuse_corr_alpha = 1122300, >>> + .fuse_corr_beta = -5936400, >>> + }, >>> + { >>> + .config = &t124_tsensor_config, >>> + .base = 0x160, >>> + .calib_fuse_offset = 0x15c, >>> + .fuse_corr_alpha = 1145700, >>> + .fuse_corr_beta = -7124600, >>> + }, >>> + { >>> + .config = &t124_tsensor_config, >>> + .base = 0x180, >>> + .calib_fuse_offset = 0x154, >>> + .fuse_corr_alpha = 1120100, >>> + .fuse_corr_beta = -6000500, >>> + }, >>> + { >>> + .config = &t124_tsensor_config, >>> + .base = 0x1a0, >>> + .calib_fuse_offset = 0x160, >>> + .fuse_corr_alpha = 1106500, >>> + .fuse_corr_beta = -6729300, >>> + }, >>> +}; >>> + >>> +struct tegra_soctherm { >>> + struct reset_control *reset; >>> + struct clk *clock_tsensor; >>> + struct clk *clock_soctherm; >>> + void __iomem *regs; >>> + >>> + struct thermal_zone_device *thermctl_tzs[4]; >>> +}; >>> + >>> +struct tsensor_shared_calibration { >>> + u32 base_cp, base_ft; >>> + u32 actual_temp_cp, actual_temp_ft; >>> +}; >>> + >>> +static int calculate_shared_calibration(struct tsensor_shared_calibration *r) >>> +{ >>> + u32 val, shifted_cp, shifted_ft; >>> + int err; >>> + >>> + err = tegra_fuse_readl(FUSE_TSENSOR8_CALIB, &val); >>> + if (err) >>> + return err; >>> + r->base_cp = val & FUSE_TSENSOR8_CALIB_CP_TS_BASE_MASK; >>> + r->base_ft = (val & FUSE_TSENSOR8_CALIB_FT_TS_BASE_MASK) >>> + >> FUSE_TSENSOR8_CALIB_FT_TS_BASE_SHIFT; >>> + val = ((val & FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_MASK) >>> + >> FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_SHIFT); >>> + shifted_ft = sign_extend32(val, 4); >>> + >>> + err = tegra_fuse_readl(FUSE_SPARE_REALIGNMENT_REG_0, &val); >>> + if (err) >>> + return err; >>> + shifted_cp = sign_extend32(val, 5); >>> + >>> + r->actual_temp_cp = 2 * NOMINAL_CALIB_CP_T124 + shifted_cp; >>> + r->actual_temp_ft = 2 * NOMINAL_CALIB_FT_T124 + shifted_ft; >>> + >>> + return 0; >>> +} >>> + >>> +static s64 div64_s64_precise(s64 a, s64 b) >>> +{ >>> + s64 r, al; >>> + >>> + /* Scale up for increased precision division */ >>> + al = a << 16; >>> + >>> + r = div64_s64(al * 2 + 1, 2 * b); >>> + return r >> 16; >>> +} >>> + >>> +static int >>> +calculate_tsensor_calibration(const struct tegra_tsensor *sensor, >>> + const struct tsensor_shared_calibration *shared, >>> + u32 *calib) >>> +{ >>> + u32 val; >>> + s32 actual_tsensor_ft, actual_tsensor_cp, delta_sens, delta_temp, >>> + mult, div; >>> + s16 therma, thermb; >>> + s64 tmp; >>> + int err; >>> + >>> + err = tegra_fuse_readl(sensor->calib_fuse_offset, &val); >>> + if (err) >>> + return err; >>> + >>> + actual_tsensor_cp = (shared->base_cp * 64) + sign_extend32(val, 12); >>> + val = (val & FUSE_TSENSOR_CALIB_FT_TS_BASE_MASK) >>> + >> FUSE_TSENSOR_CALIB_FT_TS_BASE_SHIFT; >>> + actual_tsensor_ft = (shared->base_ft * 32) + sign_extend32(val, 12); >>> + >>> + delta_sens = actual_tsensor_ft - actual_tsensor_cp; >>> + delta_temp = shared->actual_temp_ft - shared->actual_temp_cp; >>> + >>> + mult = sensor->config->pdiv * sensor->config->tsample_ate; >>> + div = sensor->config->tsample * sensor->config->pdiv_ate; >>> + >>> + therma = div64_s64_precise((s64) delta_temp * (1LL << 13) * mult, >>> + (s64) delta_sens * div); >>> + >>> + tmp = (s64)actual_tsensor_ft * shared->actual_temp_cp - >>> + (s64)actual_tsensor_cp * shared->actual_temp_ft; >>> + thermb = div64_s64_precise(tmp, (s64)delta_sens); >>> + >>> + therma = div64_s64_precise((s64)therma * sensor->fuse_corr_alpha, >>> + (s64)1000000LL); >>> + thermb = div64_s64_precise((s64)thermb * sensor->fuse_corr_alpha + >>> + sensor->fuse_corr_beta, (s64)1000000LL); >>> + >>> + *calib = ((u16)therma << SENSOR_CONFIG2_THERMA_SHIFT) | >>> + ((u16)thermb << SENSOR_CONFIG2_THERMB_SHIFT); >>> + >>> + return 0; >>> +} >>> + >>> +static int enable_tsensor(struct tegra_soctherm *tegra, >>> + const struct tegra_tsensor *sensor, >>> + const struct tsensor_shared_calibration *shared) >>> +{ >>> + void __iomem *base = tegra->regs + sensor->base; >>> + unsigned int val; >>> + u32 calib; >>> + int err; >>> + >>> + err = calculate_tsensor_calibration(sensor, shared, &calib); >>> + if (err) >>> + return err; >>> + >>> + val = sensor->config->tall << SENSOR_CONFIG0_TALL_SHIFT; >>> + writel(val, base + SENSOR_CONFIG0); >>> + >>> + val = (sensor->config->tsample - 1) << SENSOR_CONFIG1_TSAMPLE_SHIFT; >>> + val |= sensor->config->tiddq_en << SENSOR_CONFIG1_TIDDQ_EN_SHIFT; >>> + val |= sensor->config->ten_count << SENSOR_CONFIG1_TEN_COUNT_SHIFT; >>> + val |= SENSOR_CONFIG1_TEMP_ENABLE; >>> + writel(val, base + SENSOR_CONFIG1); >>> + >>> + writel(calib, base + SENSOR_CONFIG2); >>> + >>> + return 0; >>> +} >>> + >>> +/* >>> + * Translate from soctherm readback format to millicelsius. >>> + * The soctherm readback format in bits is as follows: >>> + * TTTTTTTT H______N >>> + * where T's contain the temperature in Celsius, >>> + * H denotes an addition of 0.5 Celsius and N denotes negation >>> + * of the final value. >>> + */ >>> +static long translate_temp(u16 val) >>> +{ >>> + long t; >>> + >>> + t = ((val & READBACK_VALUE_MASK) >> READBACK_VALUE_SHIFT) * 1000; >>> + if (val & READBACK_ADD_HALF) >>> + t += 500; >>> + if (val & READBACK_NEGATE) >>> + t *= -1; >>> + >>> + return t; >>> +} >>> + >>> +static int tegra_thermctl_get_temp(void *data, long *out_temp) >>> +{ >>> + struct tegra_thermctl_zone *zone = data; >>> + u32 val; >>> + >>> + val = (readl(zone->reg) >> zone->shift) & SENSOR_TEMP_MASK; >>> + *out_temp = translate_temp(val); >>> + >>> + return 0; >>> +} >>> + >>> +static const struct of_device_id tegra_soctherm_of_match[] = { >>> + { .compatible = "nvidia,tegra124-soctherm" }, >>> + { }, >>> +}; >>> +MODULE_DEVICE_TABLE(of, tegra_soctherm_of_match); >>> + >>> +struct thermctl_zone_desc { >>> + unsigned int offset; >>> + unsigned int shift; >>> +}; >>> + >>> +static const struct thermctl_zone_desc t124_thermctl_temp_zones[] = { >>> + { SENSOR_TEMP1, 16 }, >>> + { SENSOR_TEMP2, 16 }, >>> + { SENSOR_TEMP1, 0 }, >>> + { SENSOR_TEMP2, 0 } >>> +}; >>> + >>> +static int tegra_soctherm_probe(struct platform_device *pdev) >>> +{ >>> + struct tegra_soctherm *tegra; >>> + struct thermal_zone_device *tz; >>> + struct tsensor_shared_calibration shared_calib; >>> + struct resource *res; >>> + unsigned int i; >>> + int err; >>> + >>> + const struct tegra_tsensor *tsensors = t124_tsensors; >>> + >>> + tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); >>> + if (!tegra) >>> + return -ENOMEM; >>> + >>> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); >>> + tegra->regs = devm_ioremap_resource(&pdev->dev, res); >>> + if (IS_ERR(tegra->regs)) >>> + return PTR_ERR(tegra->regs); >>> + >>> + tegra->reset = devm_reset_control_get(&pdev->dev, "soctherm"); >>> + if (IS_ERR(tegra->reset)) { >>> + dev_err(&pdev->dev, "can't get soctherm reset\n"); >>> + return PTR_ERR(tegra->reset); >>> + } >>> + >>> + tegra->clock_tsensor = devm_clk_get(&pdev->dev, "tsensor"); >>> + if (IS_ERR(tegra->clock_tsensor)) { >>> + dev_err(&pdev->dev, "can't get tsensor clock\n"); >>> + return PTR_ERR(tegra->clock_tsensor); >>> + } >>> + >>> + tegra->clock_soctherm = devm_clk_get(&pdev->dev, "soctherm"); >>> + if (IS_ERR(tegra->clock_soctherm)) { >>> + dev_err(&pdev->dev, "can't get soctherm clock\n"); >>> + return PTR_ERR(tegra->clock_soctherm); >>> + } >>> + >>> + reset_control_assert(tegra->reset); >>> + >>> + err = clk_prepare_enable(tegra->clock_soctherm); >>> + if (err) >>> + return err; >>> + >>> + err = clk_prepare_enable(tegra->clock_tsensor); >>> + if (err) { >>> + clk_disable_unprepare(tegra->clock_soctherm); >>> + return err; >>> + } >>> + >>> + reset_control_deassert(tegra->reset); >>> + >>> + /* Initialize raw sensors */ >>> + >>> + err = calculate_shared_calibration(&shared_calib); >>> + if (err) >>> + goto disable_clocks; >>> + >>> + for (i = 0; i < ARRAY_SIZE(t124_tsensors); ++i) { >>> + err = enable_tsensor(tegra, tsensors + i, &shared_calib); >>> + if (err) >>> + goto disable_clocks; >>> + } >>> + >>> + writel(SENSOR_PDIV_T124, tegra->regs + SENSOR_PDIV); >>> + writel(SENSOR_HOTSPOT_OFF_T124, tegra->regs + SENSOR_HOTSPOT_OFF); >>> + >>> + /* Initialize thermctl sensors */ >>> + >>> + for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) { >>> + struct tegra_thermctl_zone *zone = >>> + devm_kzalloc(&pdev->dev, sizeof(*zone), GFP_KERNEL); >>> + if (!zone) { >>> + err = -ENOMEM; >>> + goto unregister_tzs; >>> + } >>> + >>> + zone->reg = tegra->regs + t124_thermctl_temp_zones[i].offset; >>> + zone->shift = t124_thermctl_temp_zones[i].shift; >>> + >>> + tz = thermal_zone_of_sensor_register(&pdev->dev, i, zone, >>> + tegra_thermctl_get_temp, >>> + NULL); >>> + if (IS_ERR(tz)) { >>> + err = PTR_ERR(tz); >>> + dev_err(&pdev->dev, "failed to register sensor: %d\n", >>> + err); >>> + goto unregister_tzs; >>> + } >>> + >>> + tegra->thermctl_tzs[i] = tz; >>> + } >>> + >>> + return 0; >>> + >>> +unregister_tzs: >>> + while (i--) >>> + thermal_zone_of_sensor_unregister(&pdev->dev, >>> + tegra->thermctl_tzs[i]); >>> + >>> +disable_clocks: >>> + clk_disable_unprepare(tegra->clock_tsensor); >>> + clk_disable_unprepare(tegra->clock_soctherm); >>> + >>> + return err; >>> +} >>> + >>> +static int tegra_soctherm_remove(struct platform_device *pdev) >>> +{ >>> + struct tegra_soctherm *tegra = platform_get_drvdata(pdev); >>> + unsigned int i; >>> + >>> + for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) { >>> + thermal_zone_of_sensor_unregister(&pdev->dev, >>> + tegra->thermctl_tzs[i]); >>> + } >>> + >>> + clk_disable_unprepare(tegra->clock_tsensor); >>> + clk_disable_unprepare(tegra->clock_soctherm); >>> + >>> + return 0; >>> +} >>> + >>> +static struct platform_driver tegra_soctherm_driver = { >>> + .probe = tegra_soctherm_probe, >>> + .remove = tegra_soctherm_remove, >>> + .driver = { >>> + .name = "tegra-soctherm", >>> + .of_match_table = tegra_soctherm_of_match, >>> + }, >>> +}; >>> +module_platform_driver(tegra_soctherm_driver); >>> + >>> +MODULE_AUTHOR("Mikko Perttunen <mperttunen@nvidia.com>"); >>> +MODULE_DESCRIPTION("NVIDIA Tegra SOCTHERM thermal management driver"); >>> +MODULE_LICENSE("GPL v2"); >>> >> -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 693208e..fd9d049 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -175,6 +175,16 @@ config ARMADA_THERMAL Enable this option if you want to have support for thermal management controller present in Armada 370 and Armada XP SoC. +config TEGRA_SOCTHERM + tristate "Tegra SOCTHERM thermal management" + depends on ARCH_TEGRA + help + Enable this option for integrated thermal management support on NVIDIA + Tegra124 systems-on-chip. The driver supports four thermal zones + (CPU, GPU, MEM, PLLX). Cooling devices can be bound to the thermal + zones to manage temperatures. This option is also required for the + emergency thermal reset (thermtrip) feature to function. + config DB8500_CPUFREQ_COOLING tristate "DB8500 cpufreq cooling" depends on ARCH_U8500 diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 31e232f..f0b94d5 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -33,3 +33,4 @@ obj-$(CONFIG_INTEL_SOC_DTS_THERMAL) += intel_soc_dts_thermal.o obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/ obj-$(CONFIG_ACPI_INT3403_THERMAL) += int3403_thermal.o obj-$(CONFIG_ST_THERMAL) += st/ +obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o diff --git a/drivers/thermal/tegra_soctherm.c b/drivers/thermal/tegra_soctherm.c new file mode 100644 index 0000000..70f7e9e --- /dev/null +++ b/drivers/thermal/tegra_soctherm.c @@ -0,0 +1,473 @@ +/* + * Copyright (c) 2014, NVIDIA CORPORATION. All rights reserved. + * + * Author: + * Mikko Perttunen <mperttunen@nvidia.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that 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/bitops.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/reset.h> +#include <linux/thermal.h> + +#include <soc/tegra/fuse.h> + +#define SENSOR_CONFIG0 0 +#define SENSOR_CONFIG0_STOP BIT(0) +#define SENSOR_CONFIG0_TALL_SHIFT 8 +#define SENSOR_CONFIG0_TCALC_OVER BIT(4) +#define SENSOR_CONFIG0_OVER BIT(3) +#define SENSOR_CONFIG0_CPTR_OVER BIT(2) + +#define SENSOR_CONFIG1 4 +#define SENSOR_CONFIG1_TSAMPLE_SHIFT 0 +#define SENSOR_CONFIG1_TIDDQ_EN_SHIFT 15 +#define SENSOR_CONFIG1_TEN_COUNT_SHIFT 24 +#define SENSOR_CONFIG1_TEMP_ENABLE BIT(31) + +#define SENSOR_CONFIG2 8 +#define SENSOR_CONFIG2_THERMA_SHIFT 16 +#define SENSOR_CONFIG2_THERMB_SHIFT 0 + +#define SENSOR_PDIV 0x1c0 +#define SENSOR_PDIV_T124 0x8888 +#define SENSOR_HOTSPOT_OFF 0x1c4 +#define SENSOR_HOTSPOT_OFF_T124 0x00060600 +#define SENSOR_TEMP1 0x1c8 +#define SENSOR_TEMP2 0x1cc + +#define SENSOR_TEMP_MASK 0xffff +#define READBACK_VALUE_MASK 0xff00 +#define READBACK_VALUE_SHIFT 8 +#define READBACK_ADD_HALF BIT(7) +#define READBACK_NEGATE BIT(1) + +#define FUSE_TSENSOR8_CALIB 0x180 +#define FUSE_SPARE_REALIGNMENT_REG_0 0x1fc + +#define FUSE_TSENSOR_CALIB_CP_TS_BASE_MASK 0x1fff +#define FUSE_TSENSOR_CALIB_FT_TS_BASE_MASK (0x1fff << 13) +#define FUSE_TSENSOR_CALIB_FT_TS_BASE_SHIFT 13 + +#define FUSE_TSENSOR8_CALIB_CP_TS_BASE_MASK 0x3ff +#define FUSE_TSENSOR8_CALIB_FT_TS_BASE_MASK (0x7ff << 10) +#define FUSE_TSENSOR8_CALIB_FT_TS_BASE_SHIFT 10 + +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_CP_MASK 0x3f +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_MASK (0x1f << 21) +#define FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_SHIFT 21 + +#define NOMINAL_CALIB_FT_T124 105 +#define NOMINAL_CALIB_CP_T124 25 + +struct tegra_tsensor_configuration { + u32 tall, tsample, tiddq_en, ten_count, pdiv, tsample_ate, pdiv_ate; +}; + +struct tegra_tsensor { + const struct tegra_tsensor_configuration *config; + u32 base, calib_fuse_offset; + /* Correction values used to modify values read from calibration fuses */ + s32 fuse_corr_alpha, fuse_corr_beta; +}; + +struct tegra_thermctl_zone { + void __iomem *reg; + unsigned int shift; +}; + +static const struct tegra_tsensor_configuration t124_tsensor_config = { + .tall = 16300, + .tsample = 120, + .tiddq_en = 1, + .ten_count = 1, + .pdiv = 8, + .tsample_ate = 480, + .pdiv_ate = 8 +}; + +static const struct tegra_tsensor t124_tsensors[] = { + { + .config = &t124_tsensor_config, + .base = 0xc0, + .calib_fuse_offset = 0x098, + .fuse_corr_alpha = 1135400, + .fuse_corr_beta = -6266900, + }, + { + .config = &t124_tsensor_config, + .base = 0xe0, + .calib_fuse_offset = 0x084, + .fuse_corr_alpha = 1122220, + .fuse_corr_beta = -5700700, + }, + { + .config = &t124_tsensor_config, + .base = 0x100, + .calib_fuse_offset = 0x088, + .fuse_corr_alpha = 1127000, + .fuse_corr_beta = -6768200, + }, + { + .config = &t124_tsensor_config, + .base = 0x120, + .calib_fuse_offset = 0x12c, + .fuse_corr_alpha = 1110900, + .fuse_corr_beta = -6232000, + }, + { + .config = &t124_tsensor_config, + .base = 0x140, + .calib_fuse_offset = 0x158, + .fuse_corr_alpha = 1122300, + .fuse_corr_beta = -5936400, + }, + { + .config = &t124_tsensor_config, + .base = 0x160, + .calib_fuse_offset = 0x15c, + .fuse_corr_alpha = 1145700, + .fuse_corr_beta = -7124600, + }, + { + .config = &t124_tsensor_config, + .base = 0x180, + .calib_fuse_offset = 0x154, + .fuse_corr_alpha = 1120100, + .fuse_corr_beta = -6000500, + }, + { + .config = &t124_tsensor_config, + .base = 0x1a0, + .calib_fuse_offset = 0x160, + .fuse_corr_alpha = 1106500, + .fuse_corr_beta = -6729300, + }, +}; + +struct tegra_soctherm { + struct reset_control *reset; + struct clk *clock_tsensor; + struct clk *clock_soctherm; + void __iomem *regs; + + struct thermal_zone_device *thermctl_tzs[4]; +}; + +struct tsensor_shared_calibration { + u32 base_cp, base_ft; + u32 actual_temp_cp, actual_temp_ft; +}; + +static int calculate_shared_calibration(struct tsensor_shared_calibration *r) +{ + u32 val, shifted_cp, shifted_ft; + int err; + + err = tegra_fuse_readl(FUSE_TSENSOR8_CALIB, &val); + if (err) + return err; + r->base_cp = val & FUSE_TSENSOR8_CALIB_CP_TS_BASE_MASK; + r->base_ft = (val & FUSE_TSENSOR8_CALIB_FT_TS_BASE_MASK) + >> FUSE_TSENSOR8_CALIB_FT_TS_BASE_SHIFT; + val = ((val & FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_MASK) + >> FUSE_SPARE_REALIGNMENT_REG_SHIFT_FT_SHIFT); + shifted_ft = sign_extend32(val, 4); + + err = tegra_fuse_readl(FUSE_SPARE_REALIGNMENT_REG_0, &val); + if (err) + return err; + shifted_cp = sign_extend32(val, 5); + + r->actual_temp_cp = 2 * NOMINAL_CALIB_CP_T124 + shifted_cp; + r->actual_temp_ft = 2 * NOMINAL_CALIB_FT_T124 + shifted_ft; + + return 0; +} + +static s64 div64_s64_precise(s64 a, s64 b) +{ + s64 r, al; + + /* Scale up for increased precision division */ + al = a << 16; + + r = div64_s64(al * 2 + 1, 2 * b); + return r >> 16; +} + +static int +calculate_tsensor_calibration(const struct tegra_tsensor *sensor, + const struct tsensor_shared_calibration *shared, + u32 *calib) +{ + u32 val; + s32 actual_tsensor_ft, actual_tsensor_cp, delta_sens, delta_temp, + mult, div; + s16 therma, thermb; + s64 tmp; + int err; + + err = tegra_fuse_readl(sensor->calib_fuse_offset, &val); + if (err) + return err; + + actual_tsensor_cp = (shared->base_cp * 64) + sign_extend32(val, 12); + val = (val & FUSE_TSENSOR_CALIB_FT_TS_BASE_MASK) + >> FUSE_TSENSOR_CALIB_FT_TS_BASE_SHIFT; + actual_tsensor_ft = (shared->base_ft * 32) + sign_extend32(val, 12); + + delta_sens = actual_tsensor_ft - actual_tsensor_cp; + delta_temp = shared->actual_temp_ft - shared->actual_temp_cp; + + mult = sensor->config->pdiv * sensor->config->tsample_ate; + div = sensor->config->tsample * sensor->config->pdiv_ate; + + therma = div64_s64_precise((s64) delta_temp * (1LL << 13) * mult, + (s64) delta_sens * div); + + tmp = (s64)actual_tsensor_ft * shared->actual_temp_cp - + (s64)actual_tsensor_cp * shared->actual_temp_ft; + thermb = div64_s64_precise(tmp, (s64)delta_sens); + + therma = div64_s64_precise((s64)therma * sensor->fuse_corr_alpha, + (s64)1000000LL); + thermb = div64_s64_precise((s64)thermb * sensor->fuse_corr_alpha + + sensor->fuse_corr_beta, (s64)1000000LL); + + *calib = ((u16)therma << SENSOR_CONFIG2_THERMA_SHIFT) | + ((u16)thermb << SENSOR_CONFIG2_THERMB_SHIFT); + + return 0; +} + +static int enable_tsensor(struct tegra_soctherm *tegra, + const struct tegra_tsensor *sensor, + const struct tsensor_shared_calibration *shared) +{ + void __iomem *base = tegra->regs + sensor->base; + unsigned int val; + u32 calib; + int err; + + err = calculate_tsensor_calibration(sensor, shared, &calib); + if (err) + return err; + + val = sensor->config->tall << SENSOR_CONFIG0_TALL_SHIFT; + writel(val, base + SENSOR_CONFIG0); + + val = (sensor->config->tsample - 1) << SENSOR_CONFIG1_TSAMPLE_SHIFT; + val |= sensor->config->tiddq_en << SENSOR_CONFIG1_TIDDQ_EN_SHIFT; + val |= sensor->config->ten_count << SENSOR_CONFIG1_TEN_COUNT_SHIFT; + val |= SENSOR_CONFIG1_TEMP_ENABLE; + writel(val, base + SENSOR_CONFIG1); + + writel(calib, base + SENSOR_CONFIG2); + + return 0; +} + +/* + * Translate from soctherm readback format to millicelsius. + * The soctherm readback format in bits is as follows: + * TTTTTTTT H______N + * where T's contain the temperature in Celsius, + * H denotes an addition of 0.5 Celsius and N denotes negation + * of the final value. + */ +static long translate_temp(u16 val) +{ + long t; + + t = ((val & READBACK_VALUE_MASK) >> READBACK_VALUE_SHIFT) * 1000; + if (val & READBACK_ADD_HALF) + t += 500; + if (val & READBACK_NEGATE) + t *= -1; + + return t; +} + +static int tegra_thermctl_get_temp(void *data, long *out_temp) +{ + struct tegra_thermctl_zone *zone = data; + u32 val; + + val = (readl(zone->reg) >> zone->shift) & SENSOR_TEMP_MASK; + *out_temp = translate_temp(val); + + return 0; +} + +static const struct of_device_id tegra_soctherm_of_match[] = { + { .compatible = "nvidia,tegra124-soctherm" }, + { }, +}; +MODULE_DEVICE_TABLE(of, tegra_soctherm_of_match); + +struct thermctl_zone_desc { + unsigned int offset; + unsigned int shift; +}; + +static const struct thermctl_zone_desc t124_thermctl_temp_zones[] = { + { SENSOR_TEMP1, 16 }, + { SENSOR_TEMP2, 16 }, + { SENSOR_TEMP1, 0 }, + { SENSOR_TEMP2, 0 } +}; + +static int tegra_soctherm_probe(struct platform_device *pdev) +{ + struct tegra_soctherm *tegra; + struct thermal_zone_device *tz; + struct tsensor_shared_calibration shared_calib; + struct resource *res; + unsigned int i; + int err; + + const struct tegra_tsensor *tsensors = t124_tsensors; + + tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL); + if (!tegra) + return -ENOMEM; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + tegra->regs = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(tegra->regs)) + return PTR_ERR(tegra->regs); + + tegra->reset = devm_reset_control_get(&pdev->dev, "soctherm"); + if (IS_ERR(tegra->reset)) { + dev_err(&pdev->dev, "can't get soctherm reset\n"); + return PTR_ERR(tegra->reset); + } + + tegra->clock_tsensor = devm_clk_get(&pdev->dev, "tsensor"); + if (IS_ERR(tegra->clock_tsensor)) { + dev_err(&pdev->dev, "can't get tsensor clock\n"); + return PTR_ERR(tegra->clock_tsensor); + } + + tegra->clock_soctherm = devm_clk_get(&pdev->dev, "soctherm"); + if (IS_ERR(tegra->clock_soctherm)) { + dev_err(&pdev->dev, "can't get soctherm clock\n"); + return PTR_ERR(tegra->clock_soctherm); + } + + reset_control_assert(tegra->reset); + + err = clk_prepare_enable(tegra->clock_soctherm); + if (err) + return err; + + err = clk_prepare_enable(tegra->clock_tsensor); + if (err) { + clk_disable_unprepare(tegra->clock_soctherm); + return err; + } + + reset_control_deassert(tegra->reset); + + /* Initialize raw sensors */ + + err = calculate_shared_calibration(&shared_calib); + if (err) + goto disable_clocks; + + for (i = 0; i < ARRAY_SIZE(t124_tsensors); ++i) { + err = enable_tsensor(tegra, tsensors + i, &shared_calib); + if (err) + goto disable_clocks; + } + + writel(SENSOR_PDIV_T124, tegra->regs + SENSOR_PDIV); + writel(SENSOR_HOTSPOT_OFF_T124, tegra->regs + SENSOR_HOTSPOT_OFF); + + /* Initialize thermctl sensors */ + + for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) { + struct tegra_thermctl_zone *zone = + devm_kzalloc(&pdev->dev, sizeof(*zone), GFP_KERNEL); + if (!zone) { + err = -ENOMEM; + goto unregister_tzs; + } + + zone->reg = tegra->regs + t124_thermctl_temp_zones[i].offset; + zone->shift = t124_thermctl_temp_zones[i].shift; + + tz = thermal_zone_of_sensor_register(&pdev->dev, i, zone, + tegra_thermctl_get_temp, + NULL); + if (IS_ERR(tz)) { + err = PTR_ERR(tz); + dev_err(&pdev->dev, "failed to register sensor: %d\n", + err); + goto unregister_tzs; + } + + tegra->thermctl_tzs[i] = tz; + } + + return 0; + +unregister_tzs: + while (i--) + thermal_zone_of_sensor_unregister(&pdev->dev, + tegra->thermctl_tzs[i]); + +disable_clocks: + clk_disable_unprepare(tegra->clock_tsensor); + clk_disable_unprepare(tegra->clock_soctherm); + + return err; +} + +static int tegra_soctherm_remove(struct platform_device *pdev) +{ + struct tegra_soctherm *tegra = platform_get_drvdata(pdev); + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(tegra->thermctl_tzs); ++i) { + thermal_zone_of_sensor_unregister(&pdev->dev, + tegra->thermctl_tzs[i]); + } + + clk_disable_unprepare(tegra->clock_tsensor); + clk_disable_unprepare(tegra->clock_soctherm); + + return 0; +} + +static struct platform_driver tegra_soctherm_driver = { + .probe = tegra_soctherm_probe, + .remove = tegra_soctherm_remove, + .driver = { + .name = "tegra-soctherm", + .of_match_table = tegra_soctherm_of_match, + }, +}; +module_platform_driver(tegra_soctherm_driver); + +MODULE_AUTHOR("Mikko Perttunen <mperttunen@nvidia.com>"); +MODULE_DESCRIPTION("NVIDIA Tegra SOCTHERM thermal management driver"); +MODULE_LICENSE("GPL v2");