| Message ID | 1408350762-15520-2-git-send-email-javier.martinez@collabora.co.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Aug 18, 2014 at 10:32:41AM +0200, Javier Martinez Canillas wrote: > The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout > (LDO) regulators. This patch adds support for all these regulators > found on the MAX77802 PMIC and is based on a driver added by Simon > Glass to the Chrome OS kernel 3.8 tree. Applied, thanks.
On Mon, Aug 18, 2014 at 2:02 PM, Javier Martinez Canillas <javier.martinez@collabora.co.uk> wrote: > The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout > (LDO) regulators. This patch adds support for all these regulators > found on the MAX77802 PMIC and is based on a driver added by Simon > Glass to the Chrome OS kernel 3.8 tree. > > Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> > Tested-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> > --- > > Changes since v7: > - Remove DVS support since that can be added as a follow up. > > Changes since v6: None > > Changes since v5: > - Take out the mfd changes from v4 that were squashed by mistake. > Suggested by Lee Jones. > > Changes since v4: None > > Changes since v3: > - Set the supply_name for regulators to lookup their parent supply node. > Suggested by Mark Brown. > - Change Exyno5 for Exynos5420/Exynos5800 in regulator driver Kconfig. > Suggested by Doug Anderson. > --- > drivers/regulator/Kconfig | 9 + > drivers/regulator/Makefile | 1 + > drivers/regulator/max77802.c | 578 +++++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 588 insertions(+) > create mode 100644 drivers/regulator/max77802.c > > diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig > index 2dc8289..8134a99 100644 > --- a/drivers/regulator/Kconfig > +++ b/drivers/regulator/Kconfig > @@ -387,6 +387,15 @@ config REGULATOR_MAX77693 > and one current regulator 'CHARGER'. This is suitable for > Exynos-4x12 chips. > > +config REGULATOR_MAX77802 > + tristate "Maxim 77802 regulator" > + depends on MFD_MAX77686 > + help > + This driver controls a Maxim 77802 regulator > + via I2C bus. The provided regulator is suitable for > + Exynos5420/Exynos5800 SoCs to control various voltages. > + It includes support for control of voltage and ramp speed. > + > config REGULATOR_MC13XXX_CORE > tristate > > diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile > index aa4a6aa..b4ec6c8 100644 > --- a/drivers/regulator/Makefile > +++ b/drivers/regulator/Makefile > @@ -52,6 +52,7 @@ obj-$(CONFIG_REGULATOR_MAX8997) += max8997.o > obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o > obj-$(CONFIG_REGULATOR_MAX77686) += max77686.o > obj-$(CONFIG_REGULATOR_MAX77693) += max77693.o > +obj-$(CONFIG_REGULATOR_MAX77802) += max77802.o > obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o > obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o > obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o > diff --git a/drivers/regulator/max77802.c b/drivers/regulator/max77802.c > new file mode 100644 > index 0000000..5f022f8 > --- /dev/null > +++ b/drivers/regulator/max77802.c > @@ -0,0 +1,578 @@ > +/* > + * max77802.c - Regulator driver for the Maxim 77802 > + * > + * Copyright (C) 2013-2014 Google, Inc > + * Simon Glass <sjg@chromium.org> > + * > + * Copyright (C) 2012 Samsung Electronics > + * Chiwoong Byun <woong.byun@smasung.com> > + * Jonghwa Lee <jonghwa3.lee@samsung.com> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + * > + * 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. > + * > + * This driver is based on max8997.c > + */ > + > +#include <linux/kernel.h> > +#include <linux/bug.h> > +#include <linux/err.h> > +#include <linux/gpio.h> > +#include <linux/slab.h> > +#include <linux/gpio/consumer.h> > +#include <linux/platform_device.h> > +#include <linux/regulator/driver.h> > +#include <linux/regulator/machine.h> > +#include <linux/regulator/of_regulator.h> > +#include <linux/mfd/max77686.h> > +#include <linux/mfd/max77686-private.h> > + > +/* Default ramp delay in case it is not manually set */ > +#define MAX77802_RAMP_DELAY 100000 /* uV/us */ > + > +#define MAX77802_OPMODE_SHIFT_LDO 6 > +#define MAX77802_OPMODE_BUCK234_SHIFT 4 > +#define MAX77802_OPMODE_MASK 0x3 > + > +#define MAX77802_VSEL_MASK 0x3F > +#define MAX77802_DVS_VSEL_MASK 0xFF > + > +#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0 > +#define MAX77802_RAMP_RATE_SHIFT_2BIT 6 > +#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0 > +#define MAX77802_RAMP_RATE_SHIFT_4BIT 4 > + > +/* MAX77802 has two register formats: 2-bit and 4-bit */ > +static const unsigned int ramp_table_77802_2bit[] = { > + 12500, > + 25000, > + 50000, > + 100000, > +}; > + > +static unsigned int ramp_table_77802_4bit[] = { > + 1000, 2000, 3030, 4000, > + 5000, 5880, 7140, 8330, > + 9090, 10000, 11110, 12500, > + 16670, 25000, 50000, 100000, > +}; > + > +struct max77802_regulator_prv { > + int num_regulators; > + struct regulator_dev *rdev[MAX77802_REG_MAX]; > + unsigned int opmode[MAX77802_REG_MAX]; > +}; > + > +static int max77802_get_opmode_shift(int id) > +{ > + if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 && > + id <= MAX77802_BUCK10)) > + return 0; > + > + if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4) > + return MAX77802_OPMODE_BUCK234_SHIFT; > + > + if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35) > + return MAX77802_OPMODE_SHIFT_LDO; > + > + return -EINVAL; > +} > + > +/* > + * Some BUCKS supports Normal[ON/OFF] mode during suspend > + * > + * BUCK 1, 6, 2-4, 5, 7-10 (all) > + * > + * The other mode (0x02) will make PWRREQ switch between normal > + * and low power. > + */ > +static int max77802_buck_set_suspend_disable(struct regulator_dev *rdev) > +{ > + unsigned int val = MAX77802_OPMODE_STANDBY; > + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); > + int id = rdev_get_id(rdev); > + int shift = max77802_get_opmode_shift(id); > + > + max77802->opmode[id] = val; > + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, > + rdev->desc->enable_mask, val << shift); > +} > + > +/* > + * Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state > + * (Enable Control Logic1 by PWRREQ) > + * > + * LDOs 2, 4-19, 22-35. > + * > + */ > +static int max77802_ldo_set_suspend_mode_logic1(struct regulator_dev *rdev, > + unsigned int mode) > +{ > + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); > + int id = rdev_get_id(rdev); > + unsigned int val; > + int shift = max77802_get_opmode_shift(id); > + > + switch (mode) { > + case REGULATOR_MODE_IDLE: /* ON in LP Mode */ > + val = MAX77802_OPMODE_LP; > + break; > + case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ > + val = MAX77802_OPMODE_NORMAL; > + break; > + case REGULATOR_MODE_STANDBY: /* ON/OFF by PWRREQ */ > + val = MAX77802_OPMODE_STANDBY; > + break; > + default: > + dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", > + rdev->desc->name, mode); > + return -EINVAL; > + } > + > + max77802->opmode[rdev_get_id(rdev)] = val; > + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, > + rdev->desc->enable_mask, val << shift); > +} > + > +/* > + * Mode 1 (Output[ON/OFF] by PWRREQ) is not supported on some LDOs > + * (Enable Control Logic2 by PWRREQ) > + * > + * LDOs 1, 20, 21, and 3, > + * > + */ > +static int max77802_ldo_set_suspend_mode_logic2(struct regulator_dev *rdev, > + unsigned int mode) > +{ > + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); > + int id = rdev_get_id(rdev); > + unsigned int val; > + int shift = max77802_get_opmode_shift(id); > + > + switch (mode) { > + case REGULATOR_MODE_IDLE: /* ON in LP Mode */ > + val = MAX77802_OPMODE_LP; > + break; > + case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ > + val = MAX77802_OPMODE_NORMAL; > + break; > + default: > + dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", > + rdev->desc->name, mode); > + return -EINVAL; > + } > + > + max77802->opmode[rdev_get_id(rdev)] = val; > + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, > + rdev->desc->enable_mask, val << shift); > +} > + > +static int max77802_enable(struct regulator_dev *rdev) > +{ > + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); > + int id = rdev_get_id(rdev); > + int shift = max77802_get_opmode_shift(id); > + > + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, > + rdev->desc->enable_mask, > + max77802->opmode[id] << shift); > +} > + > +static int max77802_find_ramp_value(struct regulator_dev *rdev, > + const unsigned int limits[], int size, > + unsigned int ramp_delay) > +{ > + int i; > + > + for (i = 0; i < size; i++) { > + if (ramp_delay <= limits[i]) > + return i; > + } > + > + /* Use maximum value for no ramp control */ > + dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n", > + rdev->desc->name, ramp_delay); > + return size - 1; > +} > + > +/* Used for BUCKs 2-4 */ > +static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev, > + int ramp_delay) > +{ > + int id = rdev_get_id(rdev); > + unsigned int ramp_value; > + > + if (id > MAX77802_BUCK4) { > + dev_warn(&rdev->dev, > + "%s: regulator: ramp delay not supported\n", > + rdev->desc->name); > + return -EINVAL; > + } > + ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit, > + ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay); > + > + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, > + MAX77802_RAMP_RATE_MASK_2BIT, > + ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT); > +} > + > +/* For BUCK1, 6 */ > +static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev, > + int ramp_delay) > +{ > + unsigned int ramp_value; > + > + ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit, > + ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay); > + > + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, > + MAX77802_RAMP_RATE_MASK_4BIT, > + ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT); > +} > + > +/* > + * LDOs 2, 4-19, 22-35 > + */ > +static struct regulator_ops max77802_ldo_ops_logic1 = { > + .list_voltage = regulator_list_voltage_linear, > + .map_voltage = regulator_map_voltage_linear, > + .is_enabled = regulator_is_enabled_regmap, > + .enable = max77802_enable, > + .disable = regulator_disable_regmap, > + .get_voltage_sel = regulator_get_voltage_sel_regmap, > + .set_voltage_sel = regulator_set_voltage_sel_regmap, > + .set_voltage_time_sel = regulator_set_voltage_time_sel, > + .set_suspend_mode = max77802_ldo_set_suspend_mode_logic1, > +}; > + > +/* > + * LDOs 1, 20, 21, 3 > + */ > +static struct regulator_ops max77802_ldo_ops_logic2 = { > + .list_voltage = regulator_list_voltage_linear, > + .map_voltage = regulator_map_voltage_linear, > + .is_enabled = regulator_is_enabled_regmap, > + .enable = max77802_enable, > + .disable = regulator_disable_regmap, > + .get_voltage_sel = regulator_get_voltage_sel_regmap, > + .set_voltage_sel = regulator_set_voltage_sel_regmap, > + .set_voltage_time_sel = regulator_set_voltage_time_sel, > + .set_suspend_mode = max77802_ldo_set_suspend_mode_logic2, > +}; > + > +/* BUCKS 1, 6 */ > +static struct regulator_ops max77802_buck_16_dvs_ops = { > + .list_voltage = regulator_list_voltage_linear, > + .map_voltage = regulator_map_voltage_linear, > + .is_enabled = regulator_is_enabled_regmap, > + .enable = max77802_enable, > + .disable = regulator_disable_regmap, > + .get_voltage_sel = regulator_get_voltage_sel_regmap, > + .set_voltage_sel = regulator_set_voltage_sel_regmap, > + .set_voltage_time_sel = regulator_set_voltage_time_sel, > + .set_ramp_delay = max77802_set_ramp_delay_4bit, > + .set_suspend_disable = max77802_buck_set_suspend_disable, > +}; > + > +/* BUCKs 2-4, 5, 7-10 */ > +static struct regulator_ops max77802_buck_dvs_ops = { > + .list_voltage = regulator_list_voltage_linear, > + .map_voltage = regulator_map_voltage_linear, > + .is_enabled = regulator_is_enabled_regmap, > + .enable = max77802_enable, > + .disable = regulator_disable_regmap, > + .get_voltage_sel = regulator_get_voltage_sel_regmap, > + .set_voltage_sel = regulator_set_voltage_sel_regmap, > + .set_voltage_time_sel = regulator_set_voltage_time_sel, > + .set_ramp_delay = max77802_set_ramp_delay_2bit, > + .set_suspend_disable = max77802_buck_set_suspend_disable, > +}; > + > +/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */ > +#define regulator_77802_desc_p_ldo(num, supply, log) { \ > + .name = "LDO"#num, \ > + .id = MAX77802_LDO##num, \ > + .supply_name = "inl"#supply, \ > + .ops = &max77802_ldo_ops_logic##log, \ > + .type = REGULATOR_VOLTAGE, \ > + .owner = THIS_MODULE, \ > + .min_uV = 800000, \ > + .uV_step = 50000, \ > + .ramp_delay = MAX77802_RAMP_DELAY, \ > + .n_voltages = 1 << 6, \ > + .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ > + .vsel_mask = MAX77802_VSEL_MASK, \ > + .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ > + .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ > +} > + > +/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */ > +#define regulator_77802_desc_n_ldo(num, supply, log) { \ > + .name = "LDO"#num, \ > + .id = MAX77802_LDO##num, \ > + .supply_name = "inl"#supply, \ > + .ops = &max77802_ldo_ops_logic##log, \ > + .type = REGULATOR_VOLTAGE, \ > + .owner = THIS_MODULE, \ > + .min_uV = 800000, \ > + .uV_step = 25000, \ > + .ramp_delay = MAX77802_RAMP_DELAY, \ > + .n_voltages = 1 << 6, \ > + .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ > + .vsel_mask = MAX77802_VSEL_MASK, \ > + .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ > + .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ > +} > + > +/* BUCKs 1, 6 */ > +#define regulator_77802_desc_16_buck(num) { \ > + .name = "BUCK"#num, \ > + .id = MAX77802_BUCK##num, \ > + .supply_name = "inb"#num, \ > + .ops = &max77802_buck_16_dvs_ops, \ > + .type = REGULATOR_VOLTAGE, \ > + .owner = THIS_MODULE, \ > + .min_uV = 612500, \ > + .uV_step = 6250, \ > + .ramp_delay = MAX77802_RAMP_DELAY, \ > + .n_voltages = 1 << 8, \ > + .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ > + .vsel_mask = MAX77802_DVS_VSEL_MASK, \ > + .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \ > + .enable_mask = MAX77802_OPMODE_MASK, \ > +} > + > +/* BUCKS 2-4 */ > +#define regulator_77802_desc_234_buck(num) { \ > + .name = "BUCK"#num, \ > + .id = MAX77802_BUCK##num, \ > + .supply_name = "inb"#num, \ > + .ops = &max77802_buck_dvs_ops, \ > + .type = REGULATOR_VOLTAGE, \ > + .owner = THIS_MODULE, \ > + .min_uV = 600000, \ > + .uV_step = 6250, \ > + .ramp_delay = MAX77802_RAMP_DELAY, \ > + .n_voltages = 0x91, \ > + .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ > + .vsel_mask = MAX77802_DVS_VSEL_MASK, \ > + .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ > + .enable_mask = MAX77802_OPMODE_MASK << \ > + MAX77802_OPMODE_BUCK234_SHIFT, \ > +} > + > +/* BUCK 5 */ > +#define regulator_77802_desc_buck5(num) { \ > + .name = "BUCK"#num, \ > + .id = MAX77802_BUCK##num, \ > + .supply_name = "inb"#num, \ > + .ops = &max77802_buck_dvs_ops, \ > + .type = REGULATOR_VOLTAGE, \ > + .owner = THIS_MODULE, \ > + .min_uV = 750000, \ > + .uV_step = 50000, \ > + .ramp_delay = MAX77802_RAMP_DELAY, \ > + .n_voltages = 1 << 6, \ > + .vsel_reg = MAX77802_REG_BUCK5OUT, \ > + .vsel_mask = MAX77802_VSEL_MASK, \ > + .enable_reg = MAX77802_REG_BUCK5CTRL, \ > + .enable_mask = MAX77802_OPMODE_MASK, \ > +} > + > +/* BUCKs 7-10 */ > +#define regulator_77802_desc_buck7_10(num) { \ > + .name = "BUCK"#num, \ > + .id = MAX77802_BUCK##num, \ > + .supply_name = "inb"#num, \ > + .ops = &max77802_buck_dvs_ops, \ > + .type = REGULATOR_VOLTAGE, \ > + .owner = THIS_MODULE, \ > + .min_uV = 750000, \ > + .uV_step = 50000, \ > + .ramp_delay = MAX77802_RAMP_DELAY, \ > + .n_voltages = 1 << 6, \ > + .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \ > + .vsel_mask = MAX77802_VSEL_MASK, \ > + .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \ > + .enable_mask = MAX77802_OPMODE_MASK, \ > +} > + > +static struct regulator_desc regulators[] = { > + regulator_77802_desc_16_buck(1), > + regulator_77802_desc_234_buck(2), > + regulator_77802_desc_234_buck(3), > + regulator_77802_desc_234_buck(4), > + regulator_77802_desc_buck5(5), > + regulator_77802_desc_16_buck(6), > + regulator_77802_desc_buck7_10(7), > + regulator_77802_desc_buck7_10(8), > + regulator_77802_desc_buck7_10(9), > + regulator_77802_desc_buck7_10(10), > + regulator_77802_desc_n_ldo(1, 10, 2), > + regulator_77802_desc_n_ldo(2, 10, 1), > + regulator_77802_desc_p_ldo(3, 3, 2), > + regulator_77802_desc_p_ldo(4, 6, 1), > + regulator_77802_desc_p_ldo(5, 3, 1), > + regulator_77802_desc_p_ldo(6, 3, 1), > + regulator_77802_desc_p_ldo(7, 3, 1), > + regulator_77802_desc_n_ldo(8, 1, 1), > + regulator_77802_desc_p_ldo(9, 5, 1), > + regulator_77802_desc_p_ldo(10, 4, 1), > + regulator_77802_desc_p_ldo(11, 4, 1), > + regulator_77802_desc_p_ldo(12, 9, 1), > + regulator_77802_desc_p_ldo(13, 4, 1), > + regulator_77802_desc_p_ldo(14, 4, 1), > + regulator_77802_desc_n_ldo(15, 1, 1), > + regulator_77802_desc_n_ldo(17, 2, 1), > + regulator_77802_desc_p_ldo(18, 7, 1), > + regulator_77802_desc_p_ldo(19, 5, 1), > + regulator_77802_desc_p_ldo(20, 7, 2), > + regulator_77802_desc_p_ldo(21, 6, 2), > + regulator_77802_desc_p_ldo(23, 9, 1), > + regulator_77802_desc_p_ldo(24, 6, 1), > + regulator_77802_desc_p_ldo(25, 9, 1), > + regulator_77802_desc_p_ldo(26, 9, 1), > + regulator_77802_desc_n_ldo(27, 2, 1), > + regulator_77802_desc_p_ldo(28, 7, 1), > + regulator_77802_desc_p_ldo(29, 7, 1), > + regulator_77802_desc_n_ldo(30, 2, 1), > + regulator_77802_desc_p_ldo(32, 9, 1), > + regulator_77802_desc_p_ldo(33, 6, 1), > + regulator_77802_desc_p_ldo(34, 9, 1), > + regulator_77802_desc_n_ldo(35, 2, 1), > +}; > + > +#ifdef CONFIG_OF > +static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, > + struct max77686_platform_data *pdata) > +{ > + struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); > + struct device_node *pmic_np, *regulators_np; > + struct max77686_regulator_data *rdata; > + struct of_regulator_match rmatch; > + unsigned int i; > + > + pmic_np = iodev->dev->of_node; > + regulators_np = of_get_child_by_name(pmic_np, "regulators"); > + if (!regulators_np) { > + dev_err(&pdev->dev, "could not find regulators sub-node\n"); > + return -EINVAL; > + } > + > + pdata->num_regulators = ARRAY_SIZE(regulators); > + rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) * > + pdata->num_regulators, GFP_KERNEL); > + if (!rdata) { > + of_node_put(regulators_np); > + return -ENOMEM; > + } > + > + for (i = 0; i < pdata->num_regulators; i++) { > + rmatch.name = regulators[i].name; > + rmatch.init_data = NULL; > + rmatch.of_node = NULL; > + if (of_regulator_match(&pdev->dev, regulators_np, &rmatch, > + 1) != 1) { > + dev_warn(&pdev->dev, "No matching regulator for '%s'\n", > + rmatch.name); > + continue; > + } > + rdata[i].initdata = rmatch.init_data; > + rdata[i].of_node = rmatch.of_node; > + rdata[i].id = regulators[i].id; > + } > + > + pdata->regulators = rdata; > + of_node_put(regulators_np); > + > + return 0; > +} > +#else > +static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, > + struct max77686_platform_data *pdata) > +{ > + return 0; > +} > +#endif /* CONFIG_OF */ > + > +static int max77802_pmic_probe(struct platform_device *pdev) > +{ > + struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); > + struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev); > + struct max77802_regulator_prv *max77802; > + int i, ret = 0, val; > + struct regulator_config config = { }; > + > + /* This is allocated by the MFD driver */ > + if (!pdata) { > + dev_err(&pdev->dev, "no platform data found for regulator\n"); > + return -ENODEV; > + } > + > + max77802 = devm_kzalloc(&pdev->dev, > + sizeof(struct max77802_regulator_prv), > + GFP_KERNEL); > + if (!max77802) > + return -ENOMEM; > + > + if (iodev->dev->of_node) { > + ret = max77802_pmic_dt_parse_pdata(pdev, pdata); > + if (ret) > + return ret; > + } > + > + config.dev = iodev->dev; > + config.regmap = iodev->regmap; > + config.driver_data = max77802; > + platform_set_drvdata(pdev, max77802); > + > + for (i = 0; i < MAX77802_REG_MAX; i++) { > + struct regulator_dev *rdev; > + int id = pdata->regulators[i].id; > + int shift = max77802_get_opmode_shift(id); > + > + config.init_data = pdata->regulators[i].initdata; > + config.of_node = pdata->regulators[i].of_node; > + > + ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); > + max77802->opmode[id] = val >> shift & MAX77802_OPMODE_MASK; I have been using this patch series for adding UHS support for dw_mmc driver. During reboot testing I came across an issue where card detection fails due to vqmmc regulator not getting enabled. On debugging further, I found that PMIC driver is reading the operating mode during probe and reusing it in the enable function. With the UHS patches vqmmc regulator gets disabled during POWER_OFF and if we do warm reboot, an incorrect operating mode(OFF) is read. This leads to the vqmmc regulator staying disabled. I have referred to 77686 driver and observed that they are handling this a little differently. With the following change in the driver above issue is resolved: - ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); - max77802->opmode[id] = val >> shift & MAX77802_OPMODE_MASK; + max77802->opmode[i] = regulators[i].enable_mask >> shift; Please have a look and let me know, if there is any better way of handling this. > + > + rdev = devm_regulator_register(&pdev->dev, > + ®ulators[i], &config); > + if (IS_ERR(rdev)) { > + dev_err(&pdev->dev, > + "regulator init failed for %d\n", i); > + return PTR_ERR(rdev); > + } > + } > + > + return 0; > +} > + > +static const struct platform_device_id max77802_pmic_id[] = { > + {"max77802-pmic", 0}, > + { }, > +}; > +MODULE_DEVICE_TABLE(platform, max77802_pmic_id); > + > +static struct platform_driver max77802_pmic_driver = { > + .driver = { > + .name = "max77802-pmic", > + .owner = THIS_MODULE, > + }, > + .probe = max77802_pmic_probe, > + .id_table = max77802_pmic_id, > +}; > + > +module_platform_driver(max77802_pmic_driver); > + > +MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver"); > +MODULE_AUTHOR("Simon Glass <sjg@chromium.org>"); > +MODULE_LICENSE("GPL"); > -- > 2.0.1 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hello Yuvaraj, On 08/22/2014 08:01 AM, Yuvaraj Cd wrote: >> + >> +static int max77802_pmic_probe(struct platform_device *pdev) >> +{ >> + struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); >> + struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev); >> + struct max77802_regulator_prv *max77802; >> + int i, ret = 0, val; >> + struct regulator_config config = { }; >> + >> + /* This is allocated by the MFD driver */ >> + if (!pdata) { >> + dev_err(&pdev->dev, "no platform data found for regulator\n"); >> + return -ENODEV; >> + } >> + >> + max77802 = devm_kzalloc(&pdev->dev, >> + sizeof(struct max77802_regulator_prv), >> + GFP_KERNEL); >> + if (!max77802) >> + return -ENOMEM; >> + >> + if (iodev->dev->of_node) { >> + ret = max77802_pmic_dt_parse_pdata(pdev, pdata); >> + if (ret) >> + return ret; >> + } >> + >> + config.dev = iodev->dev; >> + config.regmap = iodev->regmap; >> + config.driver_data = max77802; >> + platform_set_drvdata(pdev, max77802); >> + >> + for (i = 0; i < MAX77802_REG_MAX; i++) { >> + struct regulator_dev *rdev; >> + int id = pdata->regulators[i].id; >> + int shift = max77802_get_opmode_shift(id); >> + >> + config.init_data = pdata->regulators[i].initdata; >> + config.of_node = pdata->regulators[i].of_node; >> + >> + ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); >> + max77802->opmode[id] = val >> shift & MAX77802_OPMODE_MASK; > > I have been using this patch series for adding UHS support for dw_mmc > driver. During reboot testing I came across an issue where card > detection fails due to vqmmc regulator not getting enabled. On > debugging further, I found that PMIC driver is reading the operating > mode during probe and reusing it in the enable function. With the UHS > patches vqmmc regulator gets disabled during POWER_OFF and if we do > warm reboot, an incorrect operating mode(OFF) is read. This leads to > the vqmmc regulator staying disabled. I have referred to 77686 driver > and observed that they are handling this a little differently. With > the following change in the driver above issue is resolved: > > - ret = regmap_read(iodev->regmap, > regulators[i].enable_reg, &val); > - max77802->opmode[id] = val >> shift & MAX77802_OPMODE_MASK; > + max77802->opmode[i] = regulators[i].enable_mask >> shift; > I don't think this change is correct it its current form since .enable_mask is initialized to MAX77802_OPMODE_MASK << shift so this is actually setting the opmode to MAX77802_OPMODE_MASK. Now, MAX77802_OPMODE_MASK has the same value than MAX77802_OPMODE_NORMAL so what you are really doing here is initializing the opmode to MAX77802_OPMODE_NORMAL. > Please have a look and let me know, if there is any better way of handling this. > The first versions of this driver did in fact set the opmode to MAX77802_OPMODE_NORMAL on probe but Mark asked me to read it from the hardware instead [0]. I was indeed worried at the time that something like this could happen on a warm reset [1]. Mark, any opinions on how this should be solved will be highly appreciated. Best regards, Javier [0]: https://lkml.org/lkml/2014/6/16/576 [1]: https://lkml.org/lkml/2014/6/17/174 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Aug 22, 2014 at 02:15:46PM +0200, Javier Martinez Canillas wrote:
> Mark, any opinions on how this should be solved will be highly appreciated.
If someone could tell me what "this" is that'd help...
Hello Mark, On 08/22/2014 04:45 PM, Mark Brown wrote: > On Fri, Aug 22, 2014 at 02:15:46PM +0200, Javier Martinez Canillas wrote: > >> Mark, any opinions on how this should be solved will be highly appreciated. > > If someone could tell me what "this" is that'd help... > Sorry for not being clear on that regard. By "this" I meant the problem reported by Yuvaraj. The regulators operating mode is read from the hardware registers on probe as you suggested but that means that if the regulator is disabled and the machine rebooted (warm reset) the opmode reported by the hardware is MAX77802_OPMODE_OFF. The problem is that one of these regulators is used as the vqmmc-supply (VCCQ/VDD_IO) so the mmc host controller driver disables it on MMC_POWER_OFF. Now AFAIK (Yuvaraj can correct me what I got wrong) this shouldn't be an issue since on card detection, the vqmmc supply should be enabled again but on Exynos the built-in card detect line is on the same power rail as vqmmc. That means that disabling the regulator prevents card insertions to be detected. This does not happen on the downstream Chrome OS kernel because the max77802 regulator driver has some ad-hoc DT bindings were you can define the operating mode to be set on probe. For this particular regulator is MAX77802_OPMODE_STANDBY. Yuvaraj solution was to set the operating mode to MAX77802_OPMODE_NORMAL on probe() which was what I did on a previous version of the driver but you explained to me that it was not safe to do that. That's why I'm asking for suggestions. Thanks a lot and best regards, Javier -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Fri, Aug 22, 2014 at 07:53:19PM +0200, Javier Martinez Canillas wrote: > On 08/22/2014 04:45 PM, Mark Brown wrote: > > On Fri, Aug 22, 2014 at 02:15:46PM +0200, Javier Martinez Canillas wrote: > >> Mark, any opinions on how this should be solved will be highly appreciated. > > If someone could tell me what "this" is that'd help... > Sorry for not being clear on that regard. By "this" I meant the problem > reported by Yuvaraj. That mail was rather lengthy and seemed to be discussing several issues. > The problem is that one of these regulators is used as the vqmmc-supply > (VCCQ/VDD_IO) so the mmc host controller driver disables it on > MMC_POWER_OFF. Now AFAIK (Yuvaraj can correct me what I got wrong) this > shouldn't be an issue since on card detection, the vqmmc supply should be > enabled again but on Exynos the built-in card detect line is on the same > power rail as vqmmc. That means that disabling the regulator prevents card > insertions to be detected. If the MMC host controller needs a supply enabling in order to do card detection and it's supposed to be doing card detection I'd expect it to be enabling that supply. Why is it not doing that?
Hello Mark, On 08/22/2014 08:30 PM, Mark Brown wrote: > >> The problem is that one of these regulators is used as the vqmmc-supply >> (VCCQ/VDD_IO) so the mmc host controller driver disables it on >> MMC_POWER_OFF. Now AFAIK (Yuvaraj can correct me what I got wrong) this >> shouldn't be an issue since on card detection, the vqmmc supply should be >> enabled again but on Exynos the built-in card detect line is on the same >> power rail as vqmmc. That means that disabling the regulator prevents card >> insertions to be detected. > > If the MMC host controller needs a supply enabling in order to do card > detection and it's supposed to be doing card detection I'd expect it to > be enabling that supply. Why is it not doing that? > Good question. I'm not that familiar with the dw_mmc host controller nor its driver implementation so I'll let Yuvaraj or Doug to answer that. Best regards, Javier -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Hi, On Fri, Aug 22, 2014 at 3:02 PM, Javier Martinez Canillas <javier.martinez@collabora.co.uk> wrote: > Hello Mark, > > On 08/22/2014 08:30 PM, Mark Brown wrote: >> >>> The problem is that one of these regulators is used as the vqmmc-supply >>> (VCCQ/VDD_IO) so the mmc host controller driver disables it on >>> MMC_POWER_OFF. Now AFAIK (Yuvaraj can correct me what I got wrong) this >>> shouldn't be an issue since on card detection, the vqmmc supply should be >>> enabled again but on Exynos the built-in card detect line is on the same >>> power rail as vqmmc. That means that disabling the regulator prevents card >>> insertions to be detected. >> >> If the MMC host controller needs a supply enabling in order to do card >> detection and it's supposed to be doing card detection I'd expect it to >> be enabling that supply. Why is it not doing that? >> > > Good question. I'm not that familiar with the dw_mmc host controller nor > its driver implementation so I'll let Yuvaraj or Doug to answer that. I haven't seen the issue that Yuvaraj is reporting (but I also haven't picked up all of the relevant patches and tried to reproduce), so I'm going to have to leave it to Yuvaraj to answer. As far as I know the dw_mmc driver ought to be enabling vqmmc when it needs it. Perhaps there's a bug in your patch series that adds vqmmc support to dw_mmc? -Doug -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Sat, Aug 23, 2014 at 3:45 AM, Doug Anderson <dianders@chromium.org> wrote: > Hi, > > On Fri, Aug 22, 2014 at 3:02 PM, Javier Martinez Canillas > <javier.martinez@collabora.co.uk> wrote: >> Hello Mark, >> >> On 08/22/2014 08:30 PM, Mark Brown wrote: >>> >>>> The problem is that one of these regulators is used as the vqmmc-supply >>>> (VCCQ/VDD_IO) so the mmc host controller driver disables it on >>>> MMC_POWER_OFF. Now AFAIK (Yuvaraj can correct me what I got wrong) this >>>> shouldn't be an issue since on card detection, the vqmmc supply should be >>>> enabled again but on Exynos the built-in card detect line is on the same >>>> power rail as vqmmc. That means that disabling the regulator prevents card >>>> insertions to be detected. >>> >>> If the MMC host controller needs a supply enabling in order to do card >>> detection and it's supposed to be doing card detection I'd expect it to >>> be enabling that supply. Why is it not doing that? >>> >> >> Good question. I'm not that familiar with the dw_mmc host controller nor >> its driver implementation so I'll let Yuvaraj or Doug to answer that. Well,here it goes! 1. Power ON the board LDO4CTRL1[7:6] 11b 2. dw_mmc driver enable the vqmmc. 3. checks for UHS support, complete the voltage switching t0 1.8V 4. Does warm reset by reboot command. 5. mmc core calls mmc_set_ios() with MMC_POWER_OFF. 6. dw_mmc driver cut-off the regulator with LDO4CTRL1[7:6] is 00b 7.dw_mmc driver enable the vqmmc. But after step 7 also, LD4CTRL[7:6] is 00b. > > I haven't seen the issue that Yuvaraj is reporting (but I also haven't > picked up all of the relevant patches and tried to reproduce), so I'm > going to have to leave it to Yuvaraj to answer. static int max77802_enable(struct regulator_dev *rdev) { struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); int shift = max77802_get_opmode_shift(id); return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,rdev->desc->enable_mask,max77802->opmode[id] << shift); } I think in the above code snippet, the "val" is what we got it during the probe.We always write that value for enabling this regulator(which is LDO4CTRL1[7:6] 00b after warm reset) which is not correct according the MAX77802 manual. > > As far as I know the dw_mmc driver ought to be enabling vqmmc when it > needs it. Perhaps there's a bug in your patch series that adds vqmmc > support to dw_mmc? > > -Doug -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" 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/regulator/Kconfig b/drivers/regulator/Kconfig index 2dc8289..8134a99 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -387,6 +387,15 @@ config REGULATOR_MAX77693 and one current regulator 'CHARGER'. This is suitable for Exynos-4x12 chips. +config REGULATOR_MAX77802 + tristate "Maxim 77802 regulator" + depends on MFD_MAX77686 + help + This driver controls a Maxim 77802 regulator + via I2C bus. The provided regulator is suitable for + Exynos5420/Exynos5800 SoCs to control various voltages. + It includes support for control of voltage and ramp speed. + config REGULATOR_MC13XXX_CORE tristate diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index aa4a6aa..b4ec6c8 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -52,6 +52,7 @@ obj-$(CONFIG_REGULATOR_MAX8997) += max8997.o obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o obj-$(CONFIG_REGULATOR_MAX77686) += max77686.o obj-$(CONFIG_REGULATOR_MAX77693) += max77693.o +obj-$(CONFIG_REGULATOR_MAX77802) += max77802.o obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o obj-$(CONFIG_REGULATOR_MC13XXX_CORE) += mc13xxx-regulator-core.o diff --git a/drivers/regulator/max77802.c b/drivers/regulator/max77802.c new file mode 100644 index 0000000..5f022f8 --- /dev/null +++ b/drivers/regulator/max77802.c @@ -0,0 +1,578 @@ +/* + * max77802.c - Regulator driver for the Maxim 77802 + * + * Copyright (C) 2013-2014 Google, Inc + * Simon Glass <sjg@chromium.org> + * + * Copyright (C) 2012 Samsung Electronics + * Chiwoong Byun <woong.byun@smasung.com> + * Jonghwa Lee <jonghwa3.lee@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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. + * + * This driver is based on max8997.c + */ + +#include <linux/kernel.h> +#include <linux/bug.h> +#include <linux/err.h> +#include <linux/gpio.h> +#include <linux/slab.h> +#include <linux/gpio/consumer.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/of_regulator.h> +#include <linux/mfd/max77686.h> +#include <linux/mfd/max77686-private.h> + +/* Default ramp delay in case it is not manually set */ +#define MAX77802_RAMP_DELAY 100000 /* uV/us */ + +#define MAX77802_OPMODE_SHIFT_LDO 6 +#define MAX77802_OPMODE_BUCK234_SHIFT 4 +#define MAX77802_OPMODE_MASK 0x3 + +#define MAX77802_VSEL_MASK 0x3F +#define MAX77802_DVS_VSEL_MASK 0xFF + +#define MAX77802_RAMP_RATE_MASK_2BIT 0xC0 +#define MAX77802_RAMP_RATE_SHIFT_2BIT 6 +#define MAX77802_RAMP_RATE_MASK_4BIT 0xF0 +#define MAX77802_RAMP_RATE_SHIFT_4BIT 4 + +/* MAX77802 has two register formats: 2-bit and 4-bit */ +static const unsigned int ramp_table_77802_2bit[] = { + 12500, + 25000, + 50000, + 100000, +}; + +static unsigned int ramp_table_77802_4bit[] = { + 1000, 2000, 3030, 4000, + 5000, 5880, 7140, 8330, + 9090, 10000, 11110, 12500, + 16670, 25000, 50000, 100000, +}; + +struct max77802_regulator_prv { + int num_regulators; + struct regulator_dev *rdev[MAX77802_REG_MAX]; + unsigned int opmode[MAX77802_REG_MAX]; +}; + +static int max77802_get_opmode_shift(int id) +{ + if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 && + id <= MAX77802_BUCK10)) + return 0; + + if (id >= MAX77802_BUCK2 && id <= MAX77802_BUCK4) + return MAX77802_OPMODE_BUCK234_SHIFT; + + if (id >= MAX77802_LDO1 && id <= MAX77802_LDO35) + return MAX77802_OPMODE_SHIFT_LDO; + + return -EINVAL; +} + +/* + * Some BUCKS supports Normal[ON/OFF] mode during suspend + * + * BUCK 1, 6, 2-4, 5, 7-10 (all) + * + * The other mode (0x02) will make PWRREQ switch between normal + * and low power. + */ +static int max77802_buck_set_suspend_disable(struct regulator_dev *rdev) +{ + unsigned int val = MAX77802_OPMODE_STANDBY; + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + int shift = max77802_get_opmode_shift(id); + + max77802->opmode[id] = val; + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, val << shift); +} + +/* + * Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state + * (Enable Control Logic1 by PWRREQ) + * + * LDOs 2, 4-19, 22-35. + * + */ +static int max77802_ldo_set_suspend_mode_logic1(struct regulator_dev *rdev, + unsigned int mode) +{ + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + unsigned int val; + int shift = max77802_get_opmode_shift(id); + + switch (mode) { + case REGULATOR_MODE_IDLE: /* ON in LP Mode */ + val = MAX77802_OPMODE_LP; + break; + case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ + val = MAX77802_OPMODE_NORMAL; + break; + case REGULATOR_MODE_STANDBY: /* ON/OFF by PWRREQ */ + val = MAX77802_OPMODE_STANDBY; + break; + default: + dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", + rdev->desc->name, mode); + return -EINVAL; + } + + max77802->opmode[rdev_get_id(rdev)] = val; + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, val << shift); +} + +/* + * Mode 1 (Output[ON/OFF] by PWRREQ) is not supported on some LDOs + * (Enable Control Logic2 by PWRREQ) + * + * LDOs 1, 20, 21, and 3, + * + */ +static int max77802_ldo_set_suspend_mode_logic2(struct regulator_dev *rdev, + unsigned int mode) +{ + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + unsigned int val; + int shift = max77802_get_opmode_shift(id); + + switch (mode) { + case REGULATOR_MODE_IDLE: /* ON in LP Mode */ + val = MAX77802_OPMODE_LP; + break; + case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ + val = MAX77802_OPMODE_NORMAL; + break; + default: + dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n", + rdev->desc->name, mode); + return -EINVAL; + } + + max77802->opmode[rdev_get_id(rdev)] = val; + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, val << shift); +} + +static int max77802_enable(struct regulator_dev *rdev) +{ + struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev); + int id = rdev_get_id(rdev); + int shift = max77802_get_opmode_shift(id); + + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + rdev->desc->enable_mask, + max77802->opmode[id] << shift); +} + +static int max77802_find_ramp_value(struct regulator_dev *rdev, + const unsigned int limits[], int size, + unsigned int ramp_delay) +{ + int i; + + for (i = 0; i < size; i++) { + if (ramp_delay <= limits[i]) + return i; + } + + /* Use maximum value for no ramp control */ + dev_warn(&rdev->dev, "%s: ramp_delay: %d not supported, setting 100000\n", + rdev->desc->name, ramp_delay); + return size - 1; +} + +/* Used for BUCKs 2-4 */ +static int max77802_set_ramp_delay_2bit(struct regulator_dev *rdev, + int ramp_delay) +{ + int id = rdev_get_id(rdev); + unsigned int ramp_value; + + if (id > MAX77802_BUCK4) { + dev_warn(&rdev->dev, + "%s: regulator: ramp delay not supported\n", + rdev->desc->name); + return -EINVAL; + } + ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_2bit, + ARRAY_SIZE(ramp_table_77802_2bit), ramp_delay); + + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + MAX77802_RAMP_RATE_MASK_2BIT, + ramp_value << MAX77802_RAMP_RATE_SHIFT_2BIT); +} + +/* For BUCK1, 6 */ +static int max77802_set_ramp_delay_4bit(struct regulator_dev *rdev, + int ramp_delay) +{ + unsigned int ramp_value; + + ramp_value = max77802_find_ramp_value(rdev, ramp_table_77802_4bit, + ARRAY_SIZE(ramp_table_77802_4bit), ramp_delay); + + return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, + MAX77802_RAMP_RATE_MASK_4BIT, + ramp_value << MAX77802_RAMP_RATE_SHIFT_4BIT); +} + +/* + * LDOs 2, 4-19, 22-35 + */ +static struct regulator_ops max77802_ldo_ops_logic1 = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = max77802_enable, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_suspend_mode = max77802_ldo_set_suspend_mode_logic1, +}; + +/* + * LDOs 1, 20, 21, 3 + */ +static struct regulator_ops max77802_ldo_ops_logic2 = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = max77802_enable, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_suspend_mode = max77802_ldo_set_suspend_mode_logic2, +}; + +/* BUCKS 1, 6 */ +static struct regulator_ops max77802_buck_16_dvs_ops = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = max77802_enable, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_ramp_delay = max77802_set_ramp_delay_4bit, + .set_suspend_disable = max77802_buck_set_suspend_disable, +}; + +/* BUCKs 2-4, 5, 7-10 */ +static struct regulator_ops max77802_buck_dvs_ops = { + .list_voltage = regulator_list_voltage_linear, + .map_voltage = regulator_map_voltage_linear, + .is_enabled = regulator_is_enabled_regmap, + .enable = max77802_enable, + .disable = regulator_disable_regmap, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .set_voltage_time_sel = regulator_set_voltage_time_sel, + .set_ramp_delay = max77802_set_ramp_delay_2bit, + .set_suspend_disable = max77802_buck_set_suspend_disable, +}; + +/* LDOs 3-7, 9-14, 18-26, 28, 29, 32-34 */ +#define regulator_77802_desc_p_ldo(num, supply, log) { \ + .name = "LDO"#num, \ + .id = MAX77802_LDO##num, \ + .supply_name = "inl"#supply, \ + .ops = &max77802_ldo_ops_logic##log, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 800000, \ + .uV_step = 50000, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 1 << 6, \ + .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ + .vsel_mask = MAX77802_VSEL_MASK, \ + .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ + .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ +} + +/* LDOs 1, 2, 8, 15, 17, 27, 30, 35 */ +#define regulator_77802_desc_n_ldo(num, supply, log) { \ + .name = "LDO"#num, \ + .id = MAX77802_LDO##num, \ + .supply_name = "inl"#supply, \ + .ops = &max77802_ldo_ops_logic##log, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 800000, \ + .uV_step = 25000, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 1 << 6, \ + .vsel_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ + .vsel_mask = MAX77802_VSEL_MASK, \ + .enable_reg = MAX77802_REG_LDO1CTRL1 + num - 1, \ + .enable_mask = MAX77802_OPMODE_MASK << MAX77802_OPMODE_SHIFT_LDO, \ +} + +/* BUCKs 1, 6 */ +#define regulator_77802_desc_16_buck(num) { \ + .name = "BUCK"#num, \ + .id = MAX77802_BUCK##num, \ + .supply_name = "inb"#num, \ + .ops = &max77802_buck_16_dvs_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 612500, \ + .uV_step = 6250, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 1 << 8, \ + .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ + .vsel_mask = MAX77802_DVS_VSEL_MASK, \ + .enable_reg = MAX77802_REG_BUCK ## num ## CTRL, \ + .enable_mask = MAX77802_OPMODE_MASK, \ +} + +/* BUCKS 2-4 */ +#define regulator_77802_desc_234_buck(num) { \ + .name = "BUCK"#num, \ + .id = MAX77802_BUCK##num, \ + .supply_name = "inb"#num, \ + .ops = &max77802_buck_dvs_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 600000, \ + .uV_step = 6250, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 0x91, \ + .vsel_reg = MAX77802_REG_BUCK ## num ## DVS1, \ + .vsel_mask = MAX77802_DVS_VSEL_MASK, \ + .enable_reg = MAX77802_REG_BUCK ## num ## CTRL1, \ + .enable_mask = MAX77802_OPMODE_MASK << \ + MAX77802_OPMODE_BUCK234_SHIFT, \ +} + +/* BUCK 5 */ +#define regulator_77802_desc_buck5(num) { \ + .name = "BUCK"#num, \ + .id = MAX77802_BUCK##num, \ + .supply_name = "inb"#num, \ + .ops = &max77802_buck_dvs_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 750000, \ + .uV_step = 50000, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 1 << 6, \ + .vsel_reg = MAX77802_REG_BUCK5OUT, \ + .vsel_mask = MAX77802_VSEL_MASK, \ + .enable_reg = MAX77802_REG_BUCK5CTRL, \ + .enable_mask = MAX77802_OPMODE_MASK, \ +} + +/* BUCKs 7-10 */ +#define regulator_77802_desc_buck7_10(num) { \ + .name = "BUCK"#num, \ + .id = MAX77802_BUCK##num, \ + .supply_name = "inb"#num, \ + .ops = &max77802_buck_dvs_ops, \ + .type = REGULATOR_VOLTAGE, \ + .owner = THIS_MODULE, \ + .min_uV = 750000, \ + .uV_step = 50000, \ + .ramp_delay = MAX77802_RAMP_DELAY, \ + .n_voltages = 1 << 6, \ + .vsel_reg = MAX77802_REG_BUCK7OUT + (num - 7) * 3, \ + .vsel_mask = MAX77802_VSEL_MASK, \ + .enable_reg = MAX77802_REG_BUCK7CTRL + (num - 7) * 3, \ + .enable_mask = MAX77802_OPMODE_MASK, \ +} + +static struct regulator_desc regulators[] = { + regulator_77802_desc_16_buck(1), + regulator_77802_desc_234_buck(2), + regulator_77802_desc_234_buck(3), + regulator_77802_desc_234_buck(4), + regulator_77802_desc_buck5(5), + regulator_77802_desc_16_buck(6), + regulator_77802_desc_buck7_10(7), + regulator_77802_desc_buck7_10(8), + regulator_77802_desc_buck7_10(9), + regulator_77802_desc_buck7_10(10), + regulator_77802_desc_n_ldo(1, 10, 2), + regulator_77802_desc_n_ldo(2, 10, 1), + regulator_77802_desc_p_ldo(3, 3, 2), + regulator_77802_desc_p_ldo(4, 6, 1), + regulator_77802_desc_p_ldo(5, 3, 1), + regulator_77802_desc_p_ldo(6, 3, 1), + regulator_77802_desc_p_ldo(7, 3, 1), + regulator_77802_desc_n_ldo(8, 1, 1), + regulator_77802_desc_p_ldo(9, 5, 1), + regulator_77802_desc_p_ldo(10, 4, 1), + regulator_77802_desc_p_ldo(11, 4, 1), + regulator_77802_desc_p_ldo(12, 9, 1), + regulator_77802_desc_p_ldo(13, 4, 1), + regulator_77802_desc_p_ldo(14, 4, 1), + regulator_77802_desc_n_ldo(15, 1, 1), + regulator_77802_desc_n_ldo(17, 2, 1), + regulator_77802_desc_p_ldo(18, 7, 1), + regulator_77802_desc_p_ldo(19, 5, 1), + regulator_77802_desc_p_ldo(20, 7, 2), + regulator_77802_desc_p_ldo(21, 6, 2), + regulator_77802_desc_p_ldo(23, 9, 1), + regulator_77802_desc_p_ldo(24, 6, 1), + regulator_77802_desc_p_ldo(25, 9, 1), + regulator_77802_desc_p_ldo(26, 9, 1), + regulator_77802_desc_n_ldo(27, 2, 1), + regulator_77802_desc_p_ldo(28, 7, 1), + regulator_77802_desc_p_ldo(29, 7, 1), + regulator_77802_desc_n_ldo(30, 2, 1), + regulator_77802_desc_p_ldo(32, 9, 1), + regulator_77802_desc_p_ldo(33, 6, 1), + regulator_77802_desc_p_ldo(34, 9, 1), + regulator_77802_desc_n_ldo(35, 2, 1), +}; + +#ifdef CONFIG_OF +static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, + struct max77686_platform_data *pdata) +{ + struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); + struct device_node *pmic_np, *regulators_np; + struct max77686_regulator_data *rdata; + struct of_regulator_match rmatch; + unsigned int i; + + pmic_np = iodev->dev->of_node; + regulators_np = of_get_child_by_name(pmic_np, "regulators"); + if (!regulators_np) { + dev_err(&pdev->dev, "could not find regulators sub-node\n"); + return -EINVAL; + } + + pdata->num_regulators = ARRAY_SIZE(regulators); + rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) * + pdata->num_regulators, GFP_KERNEL); + if (!rdata) { + of_node_put(regulators_np); + return -ENOMEM; + } + + for (i = 0; i < pdata->num_regulators; i++) { + rmatch.name = regulators[i].name; + rmatch.init_data = NULL; + rmatch.of_node = NULL; + if (of_regulator_match(&pdev->dev, regulators_np, &rmatch, + 1) != 1) { + dev_warn(&pdev->dev, "No matching regulator for '%s'\n", + rmatch.name); + continue; + } + rdata[i].initdata = rmatch.init_data; + rdata[i].of_node = rmatch.of_node; + rdata[i].id = regulators[i].id; + } + + pdata->regulators = rdata; + of_node_put(regulators_np); + + return 0; +} +#else +static int max77802_pmic_dt_parse_pdata(struct platform_device *pdev, + struct max77686_platform_data *pdata) +{ + return 0; +} +#endif /* CONFIG_OF */ + +static int max77802_pmic_probe(struct platform_device *pdev) +{ + struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); + struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev); + struct max77802_regulator_prv *max77802; + int i, ret = 0, val; + struct regulator_config config = { }; + + /* This is allocated by the MFD driver */ + if (!pdata) { + dev_err(&pdev->dev, "no platform data found for regulator\n"); + return -ENODEV; + } + + max77802 = devm_kzalloc(&pdev->dev, + sizeof(struct max77802_regulator_prv), + GFP_KERNEL); + if (!max77802) + return -ENOMEM; + + if (iodev->dev->of_node) { + ret = max77802_pmic_dt_parse_pdata(pdev, pdata); + if (ret) + return ret; + } + + config.dev = iodev->dev; + config.regmap = iodev->regmap; + config.driver_data = max77802; + platform_set_drvdata(pdev, max77802); + + for (i = 0; i < MAX77802_REG_MAX; i++) { + struct regulator_dev *rdev; + int id = pdata->regulators[i].id; + int shift = max77802_get_opmode_shift(id); + + config.init_data = pdata->regulators[i].initdata; + config.of_node = pdata->regulators[i].of_node; + + ret = regmap_read(iodev->regmap, regulators[i].enable_reg, &val); + max77802->opmode[id] = val >> shift & MAX77802_OPMODE_MASK; + + rdev = devm_regulator_register(&pdev->dev, + ®ulators[i], &config); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, + "regulator init failed for %d\n", i); + return PTR_ERR(rdev); + } + } + + return 0; +} + +static const struct platform_device_id max77802_pmic_id[] = { + {"max77802-pmic", 0}, + { }, +}; +MODULE_DEVICE_TABLE(platform, max77802_pmic_id); + +static struct platform_driver max77802_pmic_driver = { + .driver = { + .name = "max77802-pmic", + .owner = THIS_MODULE, + }, + .probe = max77802_pmic_probe, + .id_table = max77802_pmic_id, +}; + +module_platform_driver(max77802_pmic_driver); + +MODULE_DESCRIPTION("MAXIM 77802 Regulator Driver"); +MODULE_AUTHOR("Simon Glass <sjg@chromium.org>"); +MODULE_LICENSE("GPL");