forked from Minki/linux
regulator: rt4831: Adds support for Richtek RT4831 DSV regulator
Adds support for Richtek RT4831 DSV Regulator Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> Link: https://lore.kernel.org/r/1608217244-314-6-git-send-email-u0084500@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
ChiYuan Huang
Mark Brown
parent
934b05e818
commit
9351ab8b0c
@ -969,6 +969,16 @@ config REGULATOR_RT4801
|
||||
This adds support for voltage regulators in Richtek RT4801 Display Bias IC.
|
||||
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
|
||||
tristate "Richtek RT5033 Regulators"
|
||||
depends on MFD_RT5033
|
||||
|
||||
@ -118,6 +118,7 @@ obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o
|
||||
obj-$(CONFIG_REGULATOR_RN5T618) += rn5t618-regulator.o
|
||||
obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o
|
||||
obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o
|
||||
obj-$(CONFIG_REGULATOR_RT4831) += rt4831-regulator.o
|
||||
obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o
|
||||
obj-$(CONFIG_REGULATOR_RTMV20) += rtmv20-regulator.o
|
||||
obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
|
||||
|
||||
198
drivers/regulator/rt4831-regulator.c
Normal file
198
drivers/regulator/rt4831-regulator.c
Normal file
@ -0,0 +1,198 @@
|
||||
// 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");
|
||||
Loading…
Reference in New Issue
Block a user