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regulator: bd718x7: Split driver to common and bd718x7 specific parts

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Few ROHM PMICs allow setting the voltage states for different system states
like RUN, IDLE, SUSPEND and LPSR. States are then changed via SoC specific
mechanisms. bd718x7 driver implemented device-tree parsing functions for
these state specific voltages. The parsing functions can be re-used by
other ROHM chip drivers like bd71828. Split the generic functions from
bd718x7-regulator.c to rohm-regulator.c and export them for other modules
to use.

Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Matti Vaittinen 2020-01-20 15:44:45 +02:00 committed by Lee Jones
parent ae866dec74
commit 21b72156ed
5 changed files with 221 additions and 128 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/regulator/Kconfig
View File

@ -197,6 +197,7 @@ config REGULATOR_BD70528
config REGULATOR_BD718XX
tristate "ROHM BD71837 Power Regulator"
depends on MFD_ROHM_BD718XX
select REGULATOR_ROHM
help
This driver supports voltage regulators on ROHM BD71837 PMIC.
This will enable support for the software controllable buck
@ -790,6 +791,9 @@ config REGULATOR_RN5T618
Say y here to support the regulators found on Ricoh RN5T567,
RN5T618 or RC5T619 PMIC.
config REGULATOR_ROHM
tristate
config REGULATOR_RT5033
tristate "Richtek RT5033 Regulators"
depends on MFD_RT5033

1
drivers/regulator/Makefile
View File

@ -99,6 +99,7 @@ obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
obj-$(CONFIG_REGULATOR_RC5T583) += rc5t583-regulator.o
obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o
obj-$(CONFIG_REGULATOR_RN5T618) += rn5t618-regulator.o
obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o
obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o
obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o

183
drivers/regulator/bd718x7-regulator.c
View File

@ -318,6 +318,7 @@ struct reg_init {
};
struct bd718xx_regulator_data {
struct regulator_desc desc;
const struct rohm_dvs_config dvs;
const struct reg_init init;
const struct reg_init *additional_inits;
int additional_init_amnt;
@ -349,133 +350,15 @@ static const struct reg_init bd71837_ldo6_inits[] = {
},
};
#define NUM_DVS_BUCKS 4
struct of_dvs_setting {
const char *prop;
unsigned int reg;
};
static int set_dvs_levels(const struct of_dvs_setting *dvs,
struct device_node *np,
const struct regulator_desc *desc,
struct regmap *regmap)
{
int ret, i;
unsigned int uv;
ret = of_property_read_u32(np, dvs->prop, &uv);
if (ret) {
if (ret != -EINVAL)
return ret;
return 0;
}
for (i = 0; i < desc->n_voltages; i++) {
ret = regulator_desc_list_voltage_linear_range(desc, i);
if (ret < 0)
continue;
if (ret == uv) {
i <<= ffs(desc->vsel_mask) - 1;
ret = regmap_update_bits(regmap, dvs->reg,
DVS_BUCK_RUN_MASK, i);
break;
}
}
return ret;
}
static int buck4_set_hw_dvs_levels(struct device_node *np,
static int buck_set_hw_dvs_levels(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *cfg)
{
int ret, i;
const struct of_dvs_setting dvs[] = {
{
.prop = "rohm,dvs-run-voltage",
.reg = BD71837_REG_BUCK4_VOLT_RUN,
},
};
struct bd718xx_regulator_data *data;
for (i = 0; i < ARRAY_SIZE(dvs); i++) {
ret = set_dvs_levels(&dvs[i], np, desc, cfg->regmap);
if (ret)
break;
}
return ret;
}
static int buck3_set_hw_dvs_levels(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *cfg)
{
int ret, i;
const struct of_dvs_setting dvs[] = {
{
.prop = "rohm,dvs-run-voltage",
.reg = BD71837_REG_BUCK3_VOLT_RUN,
},
};
data = container_of(desc, struct bd718xx_regulator_data, desc);
for (i = 0; i < ARRAY_SIZE(dvs); i++) {
ret = set_dvs_levels(&dvs[i], np, desc, cfg->regmap);
if (ret)
break;
}
return ret;
}
static int buck2_set_hw_dvs_levels(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *cfg)
{
int ret, i;
const struct of_dvs_setting dvs[] = {
{
.prop = "rohm,dvs-run-voltage",
.reg = BD718XX_REG_BUCK2_VOLT_RUN,
},
{
.prop = "rohm,dvs-idle-voltage",
.reg = BD718XX_REG_BUCK2_VOLT_IDLE,
},
};
for (i = 0; i < ARRAY_SIZE(dvs); i++) {
ret = set_dvs_levels(&dvs[i], np, desc, cfg->regmap);
if (ret)
break;
}
return ret;
}
static int buck1_set_hw_dvs_levels(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *cfg)
{
int ret, i;
const struct of_dvs_setting dvs[] = {
{
.prop = "rohm,dvs-run-voltage",
.reg = BD718XX_REG_BUCK1_VOLT_RUN,
},
{
.prop = "rohm,dvs-idle-voltage",
.reg = BD718XX_REG_BUCK1_VOLT_IDLE,
},
{
.prop = "rohm,dvs-suspend-voltage",
.reg = BD718XX_REG_BUCK1_VOLT_SUSP,
},
};
for (i = 0; i < ARRAY_SIZE(dvs); i++) {
ret = set_dvs_levels(&dvs[i], np, desc, cfg->regmap);
if (ret)
break;
}
return ret;
return rohm_regulator_set_dvs_levels(&data->dvs, np, desc, cfg->regmap);
}
static const struct bd718xx_regulator_data bd71847_regulators[] = {
@ -496,7 +379,17 @@ static const struct bd718xx_regulator_data bd71847_regulators[] = {
.enable_reg = BD718XX_REG_BUCK1_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
.of_parse_cb = buck1_set_hw_dvs_levels,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
ROHM_DVS_LEVEL_SUSPEND,
.run_reg = BD718XX_REG_BUCK1_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
.idle_reg = BD718XX_REG_BUCK1_VOLT_IDLE,
.idle_mask = DVS_BUCK_RUN_MASK,
.suspend_reg = BD718XX_REG_BUCK1_VOLT_SUSP,
.suspend_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD718XX_REG_BUCK1_CTRL,
@ -520,7 +413,14 @@ static const struct bd718xx_regulator_data bd71847_regulators[] = {
.enable_reg = BD718XX_REG_BUCK2_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
.of_parse_cb = buck2_set_hw_dvs_levels,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE,
.run_reg = BD718XX_REG_BUCK2_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
.idle_reg = BD718XX_REG_BUCK2_VOLT_IDLE,
.idle_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD718XX_REG_BUCK2_CTRL,
@ -792,7 +692,17 @@ static const struct bd718xx_regulator_data bd71837_regulators[] = {
.enable_reg = BD718XX_REG_BUCK1_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
.of_parse_cb = buck1_set_hw_dvs_levels,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
ROHM_DVS_LEVEL_SUSPEND,
.run_reg = BD718XX_REG_BUCK1_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
.idle_reg = BD718XX_REG_BUCK1_VOLT_IDLE,
.idle_mask = DVS_BUCK_RUN_MASK,
.suspend_reg = BD718XX_REG_BUCK1_VOLT_SUSP,
.suspend_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD718XX_REG_BUCK1_CTRL,
@ -816,7 +726,14 @@ static const struct bd718xx_regulator_data bd71837_regulators[] = {
.enable_reg = BD718XX_REG_BUCK2_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
.of_parse_cb = buck2_set_hw_dvs_levels,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE,
.run_reg = BD718XX_REG_BUCK2_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
.idle_reg = BD718XX_REG_BUCK2_VOLT_IDLE,
.idle_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD718XX_REG_BUCK2_CTRL,
@ -840,7 +757,12 @@ static const struct bd718xx_regulator_data bd71837_regulators[] = {
.enable_reg = BD71837_REG_BUCK3_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
.of_parse_cb = buck3_set_hw_dvs_levels,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN,
.run_reg = BD71837_REG_BUCK3_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD71837_REG_BUCK3_CTRL,
@ -864,7 +786,12 @@ static const struct bd718xx_regulator_data bd71837_regulators[] = {
.enable_reg = BD71837_REG_BUCK4_CTRL,
.enable_mask = BD718XX_BUCK_EN,
.owner = THIS_MODULE,
.of_parse_cb = buck4_set_hw_dvs_levels,
.of_parse_cb = buck_set_hw_dvs_levels,
},
.dvs = {
.level_map = ROHM_DVS_LEVEL_RUN,
.run_reg = BD71837_REG_BUCK4_VOLT_RUN,
.run_mask = DVS_BUCK_RUN_MASK,
},
.init = {
.reg = BD71837_REG_BUCK4_CTRL,

95
drivers/regulator/rohm-regulator.c Normal file
View File

@ -0,0 +1,95 @@
// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2020 ROHM Semiconductors
#include <linux/errno.h>
#include <linux/mfd/rohm-generic.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
static int set_dvs_level(const struct regulator_desc *desc,
struct device_node *np, struct regmap *regmap,
char *prop, unsigned int reg, unsigned int mask,
unsigned int omask, unsigned int oreg)
{
int ret, i;
uint32_t uv;
ret = of_property_read_u32(np, prop, &uv);
if (ret) {
if (ret != -EINVAL)
return ret;
return 0;
}
if (uv == 0) {
if (omask)
return regmap_update_bits(regmap, oreg, omask, 0);
}
for (i = 0; i < desc->n_voltages; i++) {
ret = regulator_desc_list_voltage_linear_range(desc, i);
if (ret < 0)
continue;
if (ret == uv) {
i <<= ffs(desc->vsel_mask) - 1;
ret = regmap_update_bits(regmap, reg, mask, i);
if (omask && !ret)
ret = regmap_update_bits(regmap, oreg, omask,
omask);
break;
}
}
return ret;
}
int rohm_regulator_set_dvs_levels(const struct rohm_dvs_config *dvs,
struct device_node *np,
const struct regulator_desc *desc,
struct regmap *regmap)
{
int i, ret = 0;
char *prop;
unsigned int reg, mask, omask, oreg = desc->enable_reg;
for (i = 0; i < ROHM_DVS_LEVEL_MAX && !ret; i++) {
if (dvs->level_map & (1 << i)) {
switch (i + 1) {
case ROHM_DVS_LEVEL_RUN:
prop = "rohm,dvs-run-voltage";
reg = dvs->run_reg;
mask = dvs->run_mask;
omask = dvs->run_on_mask;
break;
case ROHM_DVS_LEVEL_IDLE:
prop = "rohm,dvs-idle-voltage";
reg = dvs->idle_reg;
mask = dvs->idle_mask;
omask = dvs->idle_on_mask;
break;
case ROHM_DVS_LEVEL_SUSPEND:
prop = "rohm,dvs-suspend-voltage";
reg = dvs->suspend_reg;
mask = dvs->suspend_mask;
omask = dvs->suspend_on_mask;
break;
case ROHM_DVS_LEVEL_LPSR:
prop = "rohm,dvs-lpsr-voltage";
reg = dvs->lpsr_reg;
mask = dvs->lpsr_mask;
omask = dvs->lpsr_on_mask;
break;
default:
return -EINVAL;
}
ret = set_dvs_level(desc, np, regmap, prop, reg, mask,
omask, oreg);
}
}
return ret;
}
EXPORT_SYMBOL(rohm_regulator_set_dvs_levels);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("Generic helpers for ROHM PMIC regulator drivers");

66
include/linux/mfd/rohm-generic.h
View File

@ -4,6 +4,9 @@
#ifndef __LINUX_MFD_ROHM_H__
#define __LINUX_MFD_ROHM_H__
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
enum rohm_chip_type {
ROHM_CHIP_TYPE_BD71837 = 0,
ROHM_CHIP_TYPE_BD71847,
@ -17,4 +20,67 @@ struct rohm_regmap_dev {
struct regmap *regmap;
};
enum {
ROHM_DVS_LEVEL_UNKNOWN,
ROHM_DVS_LEVEL_RUN,
ROHM_DVS_LEVEL_IDLE,
ROHM_DVS_LEVEL_SUSPEND,
ROHM_DVS_LEVEL_LPSR,
ROHM_DVS_LEVEL_MAX = ROHM_DVS_LEVEL_LPSR,
};
/**
* struct rohm_dvs_config - dynamic voltage scaling register descriptions
*
* @level_map: bitmap representing supported run-levels for this
* regulator
* @run_reg: register address for regulator config at 'run' state
* @run_mask: value mask for regulator voltages at 'run' state
* @run_on_mask: enable mask for regulator at 'run' state
* @idle_reg: register address for regulator config at 'idle' state
* @idle_mask: value mask for regulator voltages at 'idle' state
* @idle_on_mask: enable mask for regulator at 'idle' state
* @suspend_reg: register address for regulator config at 'suspend' state
* @suspend_mask: value mask for regulator voltages at 'suspend' state
* @suspend_on_mask: enable mask for regulator at 'suspend' state
* @lpsr_reg: register address for regulator config at 'lpsr' state
* @lpsr_mask: value mask for regulator voltages at 'lpsr' state
* @lpsr_on_mask: enable mask for regulator at 'lpsr' state
*
* Description of ROHM PMICs voltage configuration registers for different
* system states. This is used to correctly configure the PMIC at startup
* based on values read from DT.
*/
struct rohm_dvs_config {
uint64_t level_map;
unsigned int run_reg;
unsigned int run_mask;
unsigned int run_on_mask;
unsigned int idle_reg;
unsigned int idle_mask;
unsigned int idle_on_mask;
unsigned int suspend_reg;
unsigned int suspend_mask;
unsigned int suspend_on_mask;
unsigned int lpsr_reg;
unsigned int lpsr_mask;
unsigned int lpsr_on_mask;
};
#if IS_ENABLED(CONFIG_REGULATOR_ROHM)
int rohm_regulator_set_dvs_levels(const struct rohm_dvs_config *dvs,
struct device_node *np,
const struct regulator_desc *desc,
struct regmap *regmap);
#else
static inline int rohm_regulator_set_dvs_levels(const struct rohm_dvs_config *dvs,
struct device_node *np,
const struct regulator_desc *desc,
struct regmap *regmap)
{
return 0;
}
#endif
#endif