421 lines
12 KiB
C
421 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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#include <linux/bits.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#define RT5120_REG_PGSTAT 0x03
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#define RT5120_REG_CH1VID 0x06
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#define RT5120_REG_CH1SLPVID 0x07
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#define RT5120_REG_ENABLE 0x08
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#define RT5120_REG_MODECTL 0x09
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#define RT5120_REG_UVOVPROT 0x0A
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#define RT5120_REG_SLPCTL 0x0C
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#define RT5120_REG_INTSTAT 0x1E
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#define RT5120_REG_DISCHG 0x1F
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#define RT5120_OUTPG_MASK(rid) BIT(rid + 1)
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#define RT5120_OUTUV_MASK(rid) BIT(rid + 9)
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#define RT5120_OUTOV_MASK(rid) BIT(rid + 16)
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#define RT5120_CH1VID_MASK GENMASK(6, 0)
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#define RT5120_RIDEN_MASK(rid) BIT(rid + 1)
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#define RT5120_RADEN_MASK(rid) BIT(rid)
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#define RT5120_FPWM_MASK(rid) BIT(rid + 1)
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#define RT5120_UVHICCUP_MASK BIT(1)
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#define RT5120_OVHICCUP_MASK BIT(0)
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#define RT5120_HOTDIE_MASK BIT(1)
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#define RT5120_BUCK1_MINUV 600000
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#define RT5120_BUCK1_MAXUV 1393750
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#define RT5120_BUCK1_STEPUV 6250
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#define RT5120_BUCK1_NUM_VOLT 0x80
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#define RT5120_AUTO_MODE 0
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#define RT5120_FPWM_MODE 1
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enum {
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RT5120_REGULATOR_BUCK1 = 0,
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RT5120_REGULATOR_BUCK2,
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RT5120_REGULATOR_BUCK3,
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RT5120_REGULATOR_BUCK4,
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RT5120_REGULATOR_LDO,
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RT5120_REGULATOR_EXTEN,
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RT5120_MAX_REGULATOR
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};
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struct rt5120_priv {
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struct device *dev;
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struct regmap *regmap;
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struct regulator_desc rdesc[RT5120_MAX_REGULATOR];
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};
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static int rt5120_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
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{
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struct regmap *regmap = rdev_get_regmap(rdev);
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int rid = rdev_get_id(rdev);
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unsigned int mask = RT5120_FPWM_MASK(rid), val;
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switch (mode) {
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case REGULATOR_MODE_NORMAL:
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val = 0;
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break;
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case REGULATOR_MODE_FAST:
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val = RT5120_FPWM_MASK(rid);
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break;
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default:
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return -EINVAL;
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}
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return regmap_update_bits(regmap, RT5120_REG_MODECTL, mask, val);
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}
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static unsigned int rt5120_buck_get_mode(struct regulator_dev *rdev)
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{
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struct regmap *regmap = rdev_get_regmap(rdev);
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int ret, rid = rdev_get_id(rdev);
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unsigned int val;
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ret = regmap_read(regmap, RT5120_REG_MODECTL, &val);
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if (ret)
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return REGULATOR_MODE_INVALID;
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if (val & RT5120_FPWM_MASK(rid))
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return REGULATOR_MODE_FAST;
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return REGULATOR_MODE_NORMAL;
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}
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static int rt5120_regulator_get_error_flags(struct regulator_dev *rdev,
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unsigned int *flags)
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{
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struct regmap *regmap = rdev_get_regmap(rdev);
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unsigned int stat, hd_stat, cur_flags = 0;
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int rid = rdev_get_id(rdev), ret;
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/*
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* reg 0x03/0x04/0x05 to indicate PG/UV/OV
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* use block read to descrease I/O xfer time
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*/
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ret = regmap_raw_read(regmap, RT5120_REG_PGSTAT, &stat, 3);
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if (ret)
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return ret;
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ret = regmap_read(regmap, RT5120_REG_INTSTAT, &hd_stat);
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if (ret)
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return ret;
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if (!(stat & RT5120_OUTPG_MASK(rid))) {
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if (stat & RT5120_OUTUV_MASK(rid))
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cur_flags |= REGULATOR_ERROR_UNDER_VOLTAGE;
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if (stat & RT5120_OUTOV_MASK(rid))
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cur_flags |= REGULATOR_ERROR_REGULATION_OUT;
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}
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if (hd_stat & RT5120_HOTDIE_MASK)
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cur_flags |= REGULATOR_ERROR_OVER_TEMP;
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*flags = cur_flags;
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return 0;
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}
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static int rt5120_buck1_set_suspend_voltage(struct regulator_dev *rdev, int uV)
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{
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struct regmap *regmap = rdev_get_regmap(rdev);
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int sel;
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if (uV < RT5120_BUCK1_MINUV || uV > RT5120_BUCK1_MAXUV)
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return -EINVAL;
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sel = (uV - RT5120_BUCK1_MINUV) / RT5120_BUCK1_STEPUV;
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return regmap_write(regmap, RT5120_REG_CH1SLPVID, sel);
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}
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static int rt5120_regulator_set_suspend_enable(struct regulator_dev *rdev)
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{
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struct regmap *regmap = rdev_get_regmap(rdev);
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int rid = rdev_get_id(rdev);
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unsigned int mask = RT5120_RIDEN_MASK(rid);
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return regmap_update_bits(regmap, RT5120_REG_SLPCTL, mask, mask);
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}
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static int rt5120_regulator_set_suspend_disable(struct regulator_dev *rdev)
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{
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struct regmap *regmap = rdev_get_regmap(rdev);
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int rid = rdev_get_id(rdev);
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unsigned int mask = RT5120_RIDEN_MASK(rid);
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return regmap_update_bits(regmap, RT5120_REG_SLPCTL, mask, 0);
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}
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static const struct regulator_ops rt5120_buck1_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.list_voltage = regulator_list_voltage_linear,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_active_discharge = regulator_set_active_discharge_regmap,
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.set_mode = rt5120_buck_set_mode,
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.get_mode = rt5120_buck_get_mode,
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.get_error_flags = rt5120_regulator_get_error_flags,
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.set_suspend_voltage = rt5120_buck1_set_suspend_voltage,
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.set_suspend_enable = rt5120_regulator_set_suspend_enable,
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.set_suspend_disable = rt5120_regulator_set_suspend_disable,
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};
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static const struct regulator_ops rt5120_buck234_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.set_active_discharge = regulator_set_active_discharge_regmap,
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.set_mode = rt5120_buck_set_mode,
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.get_mode = rt5120_buck_get_mode,
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.get_error_flags = rt5120_regulator_get_error_flags,
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.set_suspend_enable = rt5120_regulator_set_suspend_enable,
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.set_suspend_disable = rt5120_regulator_set_suspend_disable,
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};
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static const struct regulator_ops rt5120_ldo_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.set_active_discharge = regulator_set_active_discharge_regmap,
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.get_error_flags = rt5120_regulator_get_error_flags,
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.set_suspend_enable = rt5120_regulator_set_suspend_enable,
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.set_suspend_disable = rt5120_regulator_set_suspend_disable,
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};
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static const struct regulator_ops rt5120_exten_ops = {
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.set_suspend_enable = rt5120_regulator_set_suspend_enable,
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.set_suspend_disable = rt5120_regulator_set_suspend_disable,
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};
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static unsigned int rt5120_buck_of_map_mode(unsigned int mode)
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{
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switch (mode) {
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case RT5120_AUTO_MODE:
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return REGULATOR_MODE_NORMAL;
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case RT5120_FPWM_MODE:
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return REGULATOR_MODE_FAST;
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default:
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return REGULATOR_MODE_INVALID;
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}
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}
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static void rt5120_fillin_regulator_desc(struct regulator_desc *desc, int rid)
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{
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static const char * const name[] = {
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"buck1", "buck2", "buck3", "buck4", "ldo", "exten" };
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static const char * const sname[] = {
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"vin1", "vin2", "vin3", "vin4", "vinldo", NULL };
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/* Common regulator property */
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desc->name = name[rid];
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desc->supply_name = sname[rid];
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desc->owner = THIS_MODULE;
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desc->type = REGULATOR_VOLTAGE;
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desc->id = rid;
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desc->enable_reg = RT5120_REG_ENABLE;
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desc->enable_mask = RT5120_RIDEN_MASK(rid);
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desc->active_discharge_reg = RT5120_REG_DISCHG;
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desc->active_discharge_mask = RT5120_RADEN_MASK(rid);
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desc->active_discharge_on = RT5120_RADEN_MASK(rid);
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/* Config n_voltages to 1 for all*/
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desc->n_voltages = 1;
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/* Only buck support mode change */
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if (rid >= RT5120_REGULATOR_BUCK1 && rid <= RT5120_REGULATOR_BUCK4)
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desc->of_map_mode = rt5120_buck_of_map_mode;
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/* RID specific property init */
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switch (rid) {
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case RT5120_REGULATOR_BUCK1:
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/* Only buck1 support voltage change by I2C */
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desc->n_voltages = RT5120_BUCK1_NUM_VOLT;
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desc->min_uV = RT5120_BUCK1_MINUV;
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desc->uV_step = RT5120_BUCK1_STEPUV;
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desc->vsel_reg = RT5120_REG_CH1VID,
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desc->vsel_mask = RT5120_CH1VID_MASK,
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desc->ops = &rt5120_buck1_ops;
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break;
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case RT5120_REGULATOR_BUCK2 ... RT5120_REGULATOR_BUCK4:
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desc->ops = &rt5120_buck234_ops;
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break;
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case RT5120_REGULATOR_LDO:
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desc->ops = &rt5120_ldo_ops;
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break;
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default:
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desc->ops = &rt5120_exten_ops;
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}
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}
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static int rt5120_of_parse_cb(struct rt5120_priv *priv, int rid,
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struct of_regulator_match *match)
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{
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struct regulator_desc *desc = priv->rdesc + rid;
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struct regulator_init_data *init_data = match->init_data;
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if (!init_data || rid == RT5120_REGULATOR_BUCK1)
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return 0;
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if (init_data->constraints.min_uV != init_data->constraints.max_uV) {
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dev_err(priv->dev, "Variable voltage for fixed regulator\n");
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return -EINVAL;
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}
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desc->fixed_uV = init_data->constraints.min_uV;
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return 0;
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}
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static struct of_regulator_match rt5120_regu_match[RT5120_MAX_REGULATOR] = {
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[RT5120_REGULATOR_BUCK1] = { .name = "buck1", },
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[RT5120_REGULATOR_BUCK2] = { .name = "buck2", },
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[RT5120_REGULATOR_BUCK3] = { .name = "buck3", },
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[RT5120_REGULATOR_BUCK4] = { .name = "buck4", },
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[RT5120_REGULATOR_LDO] = { .name = "ldo", },
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[RT5120_REGULATOR_EXTEN] = { .name = "exten", }
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};
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static int rt5120_parse_regulator_dt_data(struct rt5120_priv *priv)
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{
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struct device *dev = priv->dev->parent;
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struct device_node *reg_node;
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int i, ret;
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for (i = 0; i < RT5120_MAX_REGULATOR; i++) {
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rt5120_fillin_regulator_desc(priv->rdesc + i, i);
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rt5120_regu_match[i].desc = priv->rdesc + i;
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}
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reg_node = of_get_child_by_name(dev->of_node, "regulators");
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if (!reg_node) {
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dev_err(priv->dev, "Couldn't find 'regulators' node\n");
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return -ENODEV;
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}
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ret = of_regulator_match(priv->dev, reg_node, rt5120_regu_match,
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ARRAY_SIZE(rt5120_regu_match));
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of_node_put(reg_node);
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if (ret < 0) {
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dev_err(priv->dev,
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"Error parsing regulator init data (%d)\n", ret);
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return ret;
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}
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for (i = 0; i < RT5120_MAX_REGULATOR; i++) {
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ret = rt5120_of_parse_cb(priv, i, rt5120_regu_match + i);
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if (ret) {
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dev_err(priv->dev, "Failed in [%d] of_passe_cb\n", i);
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return ret;
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}
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}
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return 0;
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}
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static int rt5120_device_property_init(struct rt5120_priv *priv)
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{
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struct device *dev = priv->dev->parent;
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struct device_node *np = dev->of_node;
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bool prot_enable;
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unsigned int prot_enable_val = 0;
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/* Assign UV/OV HW protection behavior */
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prot_enable = of_property_read_bool(np,
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|
|
"richtek,enable-undervolt-hiccup");
|
||
|
|
if (prot_enable)
|
||
|
|
prot_enable_val |= RT5120_UVHICCUP_MASK;
|
||
|
|
|
||
|
|
prot_enable = of_property_read_bool(np,
|
||
|
|
"richtek,enable-overvolt-hiccup");
|
||
|
|
if (prot_enable)
|
||
|
|
prot_enable_val |= RT5120_OVHICCUP_MASK;
|
||
|
|
|
||
|
|
return regmap_update_bits(priv->regmap, RT5120_REG_UVOVPROT,
|
||
|
|
RT5120_UVHICCUP_MASK | RT5120_OVHICCUP_MASK,
|
||
|
|
prot_enable_val);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int rt5120_regulator_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct rt5120_priv *priv;
|
||
|
|
struct regulator_dev *rdev;
|
||
|
|
struct regulator_config config = {};
|
||
|
|
int i, ret;
|
||
|
|
|
||
|
|
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
|
||
|
|
if (!priv)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
priv->dev = &pdev->dev;
|
||
|
|
|
||
|
|
priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
|
||
|
|
if (!priv->regmap) {
|
||
|
|
dev_err(&pdev->dev, "Failed to init regmap\n");
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = rt5120_device_property_init(priv);
|
||
|
|
if (ret) {
|
||
|
|
dev_err(&pdev->dev, "Failed to do property init\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = rt5120_parse_regulator_dt_data(priv);
|
||
|
|
if (ret) {
|
||
|
|
dev_err(&pdev->dev, "Failed to parse dt data\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
config.dev = &pdev->dev;
|
||
|
|
config.regmap = priv->regmap;
|
||
|
|
|
||
|
|
for (i = 0; i < RT5120_MAX_REGULATOR; i++) {
|
||
|
|
config.of_node = rt5120_regu_match[i].of_node;
|
||
|
|
config.init_data = rt5120_regu_match[i].init_data;
|
||
|
|
|
||
|
|
rdev = devm_regulator_register(&pdev->dev, priv->rdesc + i,
|
||
|
|
&config);
|
||
|
|
if (IS_ERR(rdev)) {
|
||
|
|
dev_err(&pdev->dev,
|
||
|
|
"Failed to register regulator [%d]\n", i);
|
||
|
|
return PTR_ERR(rdev);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct platform_device_id rt5120_regulator_dev_table[] = {
|
||
|
|
{ "rt5120-regulator", 0 },
|
||
|
|
{}
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(platform, rt5120_regulator_dev_table);
|
||
|
|
|
||
|
|
static struct platform_driver rt5120_regulator_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = "rt5120-regulator",
|
||
|
|
},
|
||
|
|
.id_table = rt5120_regulator_dev_table,
|
||
|
|
.probe = rt5120_regulator_probe,
|
||
|
|
};
|
||
|
|
module_platform_driver(rt5120_regulator_driver);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
|
||
|
|
MODULE_DESCRIPTION("Richtek RT5120 regulator driver");
|
||
|
|
MODULE_LICENSE("GPL v2");
|