Commit 9351ab8b authored by ChiYuan Huang's avatar ChiYuan Huang Committed by Mark Brown

regulator: rt4831: Adds support for Richtek RT4831 DSV regulator

Adds support for Richtek RT4831 DSV Regulator
Signed-off-by: default avatarChiYuan Huang <cy_huang@richtek.com>
Link: https://lore.kernel.org/r/1608217244-314-6-git-send-email-u0084500@gmail.comSigned-off-by: default avatarMark Brown <broonie@kernel.org>
parent 934b05e8
...@@ -969,6 +969,16 @@ config REGULATOR_RT4801 ...@@ -969,6 +969,16 @@ config REGULATOR_RT4801
This adds support for voltage regulators in Richtek RT4801 Display Bias IC. This adds support for voltage regulators in Richtek RT4801 Display Bias IC.
The device supports two regulators (DSVP/DSVN). The device supports two regulators (DSVP/DSVN).
config REGULATOR_RT4831
tristate "Richtek RT4831 DSV Regulators"
depends on MFD_RT4831
help
This adds support for voltage regulators in Richtek RT4831.
There are three regulators (VLCM/DSVP/DSVN).
VLCM is a virtual voltage input for DSVP/DSVN inside IC.
And DSVP/DSVN is the real Vout range from 4V to 6.5V.
It's common used to provide the power for the display panel.
config REGULATOR_RT5033 config REGULATOR_RT5033
tristate "Richtek RT5033 Regulators" tristate "Richtek RT5033 Regulators"
depends on MFD_RT5033 depends on MFD_RT5033
......
...@@ -118,6 +118,7 @@ obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o ...@@ -118,6 +118,7 @@ obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o
obj-$(CONFIG_REGULATOR_RN5T618) += rn5t618-regulator.o obj-$(CONFIG_REGULATOR_RN5T618) += rn5t618-regulator.o
obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o
obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o
obj-$(CONFIG_REGULATOR_RT4831) += rt4831-regulator.o
obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o
obj-$(CONFIG_REGULATOR_RTMV20) += rtmv20-regulator.o obj-$(CONFIG_REGULATOR_RTMV20) += rtmv20-regulator.o
obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
......
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/driver.h>
enum {
DSV_OUT_VLCM = 0,
DSV_OUT_VPOS,
DSV_OUT_VNEG,
DSV_OUT_MAX
};
#define RT4831_REG_DSVEN 0x09
#define RT4831_REG_VLCM 0x0c
#define RT4831_REG_VPOS 0x0d
#define RT4831_REG_VNEG 0x0e
#define RT4831_REG_FLAGS 0x0f
#define RT4831_VOLT_MASK GENMASK(5, 0)
#define RT4831_DSVMODE_SHIFT 5
#define RT4831_DSVMODE_MASK GENMASK(7, 5)
#define RT4831_POSADEN_MASK BIT(4)
#define RT4831_NEGADEN_MASK BIT(3)
#define RT4831_POSEN_MASK BIT(2)
#define RT4831_NEGEN_MASK BIT(1)
#define RT4831_OTP_MASK BIT(6)
#define RT4831_LCMOVP_MASK BIT(5)
#define RT4831_VPOSSCP_MASK BIT(3)
#define RT4831_VNEGSCP_MASK BIT(2)
#define DSV_MODE_NORMAL (0x4 << RT4831_DSVMODE_SHIFT)
#define DSV_MODE_BYPASS (0x6 << RT4831_DSVMODE_SHIFT)
#define STEP_UV 50000
#define VLCM_MIN_UV 4000000
#define VLCM_MAX_UV 7150000
#define VLCM_N_VOLTAGES ((VLCM_MAX_UV - VLCM_MIN_UV) / STEP_UV + 1)
#define VPN_MIN_UV 4000000
#define VPN_MAX_UV 6500000
#define VPN_N_VOLTAGES ((VPN_MAX_UV - VPN_MIN_UV) / STEP_UV + 1)
static int rt4831_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
{
struct regmap *regmap = rdev_get_regmap(rdev);
int rid = rdev_get_id(rdev);
unsigned int val, events = 0;
int ret;
ret = regmap_read(regmap, RT4831_REG_FLAGS, &val);
if (ret)
return ret;
if (val & RT4831_OTP_MASK)
events |= REGULATOR_ERROR_OVER_TEMP;
if (rid == DSV_OUT_VLCM && (val & RT4831_LCMOVP_MASK))
events |= REGULATOR_ERROR_OVER_CURRENT;
if (rid == DSV_OUT_VPOS && (val & RT4831_VPOSSCP_MASK))
events |= REGULATOR_ERROR_OVER_CURRENT;
if (rid == DSV_OUT_VNEG && (val & RT4831_VNEGSCP_MASK))
events |= REGULATOR_ERROR_OVER_CURRENT;
*flags = events;
return 0;
}
static const struct regulator_ops rt4831_dsvlcm_ops = {
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_bypass = regulator_set_bypass_regmap,
.get_bypass = regulator_get_bypass_regmap,
.get_error_flags = rt4831_get_error_flags,
};
static const struct regulator_ops rt4831_dsvpn_ops = {
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_active_discharge = regulator_set_active_discharge_regmap,
.get_error_flags = rt4831_get_error_flags,
};
static const struct regulator_desc rt4831_regulator_descs[] = {
{
.name = "DSVLCM",
.ops = &rt4831_dsvlcm_ops,
.of_match = of_match_ptr("DSVLCM"),
.regulators_node = of_match_ptr("regulators"),
.type = REGULATOR_VOLTAGE,
.id = DSV_OUT_VLCM,
.n_voltages = VLCM_N_VOLTAGES,
.min_uV = VLCM_MIN_UV,
.uV_step = STEP_UV,
.vsel_reg = RT4831_REG_VLCM,
.vsel_mask = RT4831_VOLT_MASK,
.bypass_reg = RT4831_REG_DSVEN,
.bypass_val_on = DSV_MODE_BYPASS,
.bypass_val_off = DSV_MODE_NORMAL,
},
{
.name = "DSVP",
.ops = &rt4831_dsvpn_ops,
.of_match = of_match_ptr("DSVP"),
.regulators_node = of_match_ptr("regulators"),
.type = REGULATOR_VOLTAGE,
.id = DSV_OUT_VPOS,
.n_voltages = VPN_N_VOLTAGES,
.min_uV = VPN_MIN_UV,
.uV_step = STEP_UV,
.vsel_reg = RT4831_REG_VPOS,
.vsel_mask = RT4831_VOLT_MASK,
.enable_reg = RT4831_REG_DSVEN,
.enable_mask = RT4831_POSEN_MASK,
.active_discharge_reg = RT4831_REG_DSVEN,
.active_discharge_mask = RT4831_POSADEN_MASK,
},
{
.name = "DSVN",
.ops = &rt4831_dsvpn_ops,
.of_match = of_match_ptr("DSVN"),
.regulators_node = of_match_ptr("regulators"),
.type = REGULATOR_VOLTAGE,
.id = DSV_OUT_VNEG,
.n_voltages = VPN_N_VOLTAGES,
.min_uV = VPN_MIN_UV,
.uV_step = STEP_UV,
.vsel_reg = RT4831_REG_VNEG,
.vsel_mask = RT4831_VOLT_MASK,
.enable_reg = RT4831_REG_DSVEN,
.enable_mask = RT4831_NEGEN_MASK,
.active_discharge_reg = RT4831_REG_DSVEN,
.active_discharge_mask = RT4831_NEGADEN_MASK,
}
};
static int rt4831_regulator_probe(struct platform_device *pdev)
{
struct regmap *regmap;
struct regulator_dev *rdev;
struct regulator_config config = {};
int i, ret;
regmap = dev_get_regmap(pdev->dev.parent, NULL);
if (IS_ERR(regmap)) {
dev_err(&pdev->dev, "Failed to init regmap\n");
return PTR_ERR(regmap);
}
/* Configure DSV mode to normal by default */
ret = regmap_update_bits(regmap, RT4831_REG_DSVEN, RT4831_DSVMODE_MASK, DSV_MODE_NORMAL);
if (ret) {
dev_err(&pdev->dev, "Failed to configure dsv mode to normal\n");
return ret;
}
config.dev = pdev->dev.parent;
config.regmap = regmap;
for (i = 0; i < DSV_OUT_MAX; i++) {
rdev = devm_regulator_register(&pdev->dev, rt4831_regulator_descs + i, &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "Failed to register %d regulator\n", i);
return PTR_ERR(rdev);
}
}
return 0;
}
static const struct platform_device_id rt4831_regulator_match[] = {
{ "rt4831-regulator", 0 },
{}
};
MODULE_DEVICE_TABLE(platform, rt4831_regulator_match);
static struct platform_driver rt4831_regulator_driver = {
.driver = {
.name = "rt4831-regulator",
},
.id_table = rt4831_regulator_match,
.probe = rt4831_regulator_probe,
};
module_platform_driver(rt4831_regulator_driver);
MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
MODULE_LICENSE("GPL v2");
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