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regulator: rt6160: Add support for Richtek RT6160
Add support for Richtek RT6160 voltage regulator. It can provide up to 3A output current within the adjustable voltage from 2025mV to 5200mV. It integrate a buckboost converter to support wide input voltage range from 2200mV to 5500mV. Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> Link: https://lore.kernel.org/r/1622611906-2403-2-git-send-email-u0084500@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
ChiYuan Huang
Mark Brown
parent
bce18e52c8
commit
de20b747c5
@ -1020,6 +1020,17 @@ config REGULATOR_RT5033
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RT5033 PMIC. The device supports multiple regulators like
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current source, LDO and Buck.
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config REGULATOR_RT6160
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tristate "Richtek RT6160 BuckBoost voltage regulator"
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depends on I2C
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select REGMAP_I2C
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help
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This adds support for voltage regulator in Richtek RT6160.
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This device automatically change voltage output mode from
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Buck or Boost. The mode transistion depend on the input source voltage.
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The wide output range is from 2025mV to 5200mV and can be used on most
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common application scenario.
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config REGULATOR_RTMV20
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tristate "RTMV20 Laser Diode Regulator"
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depends on I2C
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@ -123,6 +123,7 @@ obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o
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obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o
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obj-$(CONFIG_REGULATOR_RT4831) += rt4831-regulator.o
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obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o
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obj-$(CONFIG_REGULATOR_RT6160) += rt6160-regulator.o
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obj-$(CONFIG_REGULATOR_RTMV20) += rtmv20-regulator.o
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obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
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obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
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332
drivers/regulator/rt6160-regulator.c
Normal file
332
drivers/regulator/rt6160-regulator.c
Normal file
@ -0,0 +1,332 @@
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// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/property.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/of_regulator.h>
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#define RT6160_MODE_AUTO 0
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#define RT6160_MODE_FPWM 1
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#define RT6160_REG_CNTL 0x01
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#define RT6160_REG_STATUS 0x02
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#define RT6160_REG_DEVID 0x03
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#define RT6160_REG_VSELL 0x04
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#define RT6160_REG_VSELH 0x05
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#define RT6160_NUM_REGS (RT6160_REG_VSELH + 1)
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#define RT6160_FPWM_MASK BIT(3)
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#define RT6160_RAMPRATE_MASK GENMASK(1, 0)
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#define RT6160_VID_MASK GENMASK(7, 4)
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#define RT6160_VSEL_MASK GENMASK(6, 0)
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#define RT6160_HDSTAT_MASK BIT(4)
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#define RT6160_UVSTAT_MASK BIT(3)
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#define RT6160_OCSTAT_MASK BIT(2)
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#define RT6160_TSDSTAT_MASK BIT(1)
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#define RT6160_PGSTAT_MASK BIT(0)
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#define RT6160_VENDOR_ID 0xA0
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#define RT6160_VOUT_MINUV 2025000
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#define RT6160_VOUT_MAXUV 5200000
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#define RT6160_VOUT_STPUV 25000
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#define RT6160_N_VOUTS ((RT6160_VOUT_MAXUV - RT6160_VOUT_MINUV) / RT6160_VOUT_STPUV + 1)
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#define RT6160_I2CRDY_TIMEUS 100
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struct rt6160_priv {
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struct regulator_desc desc;
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struct gpio_desc *enable_gpio;
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struct regmap *regmap;
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bool vsel_active_low;
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bool enable_state;
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};
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static int rt6160_enable(struct regulator_dev *rdev)
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{
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struct rt6160_priv *priv = rdev_get_drvdata(rdev);
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if (!priv->enable_gpio)
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return 0;
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gpiod_set_value_cansleep(priv->enable_gpio, 1);
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priv->enable_state = true;
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usleep_range(RT6160_I2CRDY_TIMEUS, RT6160_I2CRDY_TIMEUS + 100);
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regcache_cache_only(priv->regmap, false);
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return regcache_sync(priv->regmap);
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}
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static int rt6160_disable(struct regulator_dev *rdev)
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{
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struct rt6160_priv *priv = rdev_get_drvdata(rdev);
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if (!priv->enable_gpio)
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return -EINVAL;
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/* Mark regcache as dirty and cache only before HW disabled */
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regcache_cache_only(priv->regmap, true);
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regcache_mark_dirty(priv->regmap);
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priv->enable_state = false;
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gpiod_set_value_cansleep(priv->enable_gpio, 0);
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return 0;
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}
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static int rt6160_is_enabled(struct regulator_dev *rdev)
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{
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struct rt6160_priv *priv = rdev_get_drvdata(rdev);
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return priv->enable_state ? 1 : 0;
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}
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static int rt6160_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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unsigned int mode_val;
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switch (mode) {
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case REGULATOR_MODE_FAST:
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mode_val = RT6160_FPWM_MASK;
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break;
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case REGULATOR_MODE_NORMAL:
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mode_val = 0;
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break;
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default:
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dev_err(&rdev->dev, "mode not supported\n");
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return -EINVAL;
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}
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return regmap_update_bits(regmap, RT6160_REG_CNTL, RT6160_FPWM_MASK, mode_val);
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}
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static unsigned int rt6160_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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unsigned int val;
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int ret;
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ret = regmap_read(regmap, RT6160_REG_CNTL, &val);
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if (ret)
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return ret;
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if (val & RT6160_FPWM_MASK)
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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 rt6160_set_suspend_voltage(struct regulator_dev *rdev, int uV)
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{
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struct rt6160_priv *priv = rdev_get_drvdata(rdev);
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struct regmap *regmap = rdev_get_regmap(rdev);
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unsigned int reg = RT6160_REG_VSELH;
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int vsel;
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vsel = regulator_map_voltage_linear(rdev, uV, uV);
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if (vsel < 0)
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return vsel;
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if (priv->vsel_active_low)
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reg = RT6160_REG_VSELL;
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return regmap_update_bits(regmap, reg, RT6160_VSEL_MASK, vsel);
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}
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static int rt6160_set_ramp_delay(struct regulator_dev *rdev, int target)
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{
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struct regmap *regmap = rdev_get_regmap(rdev);
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const int ramp_tables[] = { 1000, 2500, 5000, 10000 };
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unsigned int i, sel;
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/* Find closest larger or equal */
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for (i = 0; i < ARRAY_SIZE(ramp_tables); i++) {
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sel = i;
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/* If ramp delay is equal to 0, directly set ramp speed to fastest */
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if (target == 0) {
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sel = ARRAY_SIZE(ramp_tables) - 1;
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break;
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}
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if (target <= ramp_tables[i])
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break;
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}
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sel <<= ffs(RT6160_RAMPRATE_MASK) - 1;
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return regmap_update_bits(regmap, RT6160_REG_CNTL, RT6160_RAMPRATE_MASK, sel);
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}
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static int rt6160_get_error_flags(struct regulator_dev *rdev, unsigned int *flags)
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{
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struct regmap *regmap = rdev_get_regmap(rdev);
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unsigned int val, events = 0;
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int ret;
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ret = regmap_read(regmap, RT6160_REG_STATUS, &val);
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if (ret)
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return ret;
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if (val & (RT6160_HDSTAT_MASK | RT6160_TSDSTAT_MASK))
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events |= REGULATOR_ERROR_OVER_TEMP;
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if (val & RT6160_UVSTAT_MASK)
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events |= REGULATOR_ERROR_UNDER_VOLTAGE;
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if (val & RT6160_OCSTAT_MASK)
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events |= REGULATOR_ERROR_OVER_CURRENT;
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if (val & RT6160_PGSTAT_MASK)
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events |= REGULATOR_ERROR_FAIL;
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*flags = events;
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return 0;
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}
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static const struct regulator_ops rt6160_regulator_ops = {
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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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.enable = rt6160_enable,
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.disable = rt6160_disable,
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.is_enabled = rt6160_is_enabled,
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.set_mode = rt6160_set_mode,
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.get_mode = rt6160_get_mode,
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.set_suspend_voltage = rt6160_set_suspend_voltage,
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.set_ramp_delay = rt6160_set_ramp_delay,
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.get_error_flags = rt6160_get_error_flags,
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};
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static unsigned int rt6160_of_map_mode(unsigned int mode)
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{
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switch (mode) {
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case RT6160_MODE_FPWM:
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return REGULATOR_MODE_FAST;
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case RT6160_MODE_AUTO:
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return REGULATOR_MODE_NORMAL;
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}
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return REGULATOR_MODE_INVALID;
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}
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static bool rt6160_is_accessible_reg(struct device *dev, unsigned int reg)
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{
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if (reg >= RT6160_REG_CNTL && reg <= RT6160_REG_VSELH)
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return true;
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return false;
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}
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static bool rt6160_is_volatile_reg(struct device *dev, unsigned int reg)
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{
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if (reg == RT6160_REG_STATUS)
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return true;
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return false;
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}
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static const struct regmap_config rt6160_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = RT6160_REG_VSELH,
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.num_reg_defaults_raw = RT6160_NUM_REGS,
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.cache_type = REGCACHE_FLAT,
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.writeable_reg = rt6160_is_accessible_reg,
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.readable_reg = rt6160_is_accessible_reg,
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.volatile_reg = rt6160_is_volatile_reg,
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};
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static int rt6160_probe(struct i2c_client *i2c)
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{
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struct rt6160_priv *priv;
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struct regulator_config regulator_cfg = {};
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struct regulator_dev *rdev;
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unsigned int devid;
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int ret;
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priv = devm_kzalloc(&i2c->dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->vsel_active_low = device_property_present(&i2c->dev, "richtek,vsel-active-low");
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priv->enable_gpio = devm_gpiod_get_optional(&i2c->dev, "enable", GPIOD_OUT_HIGH);
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if (IS_ERR(priv->enable_gpio)) {
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dev_err(&i2c->dev, "Failed to get 'enable' gpio\n");
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return PTR_ERR(priv->enable_gpio);
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}
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priv->enable_state = true;
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usleep_range(RT6160_I2CRDY_TIMEUS, RT6160_I2CRDY_TIMEUS + 100);
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priv->regmap = devm_regmap_init_i2c(i2c, &rt6160_regmap_config);
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if (IS_ERR(priv->regmap)) {
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ret = PTR_ERR(priv->regmap);
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dev_err(&i2c->dev, "Failed to init regmap (%d)\n", ret);
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return ret;
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}
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ret = regmap_read(priv->regmap, RT6160_REG_DEVID, &devid);
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if (ret)
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return ret;
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if ((devid & RT6160_VID_MASK) != RT6160_VENDOR_ID) {
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dev_err(&i2c->dev, "VID not correct [0x%02x]\n", devid);
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return -ENODEV;
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}
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priv->desc.name = "rt6160-buckboost";
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priv->desc.type = REGULATOR_VOLTAGE;
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priv->desc.owner = THIS_MODULE;
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priv->desc.min_uV = RT6160_VOUT_MINUV;
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priv->desc.uV_step = RT6160_VOUT_STPUV;
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priv->desc.vsel_reg = RT6160_REG_VSELH;
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priv->desc.vsel_mask = RT6160_VSEL_MASK;
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priv->desc.n_voltages = RT6160_N_VOUTS;
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priv->desc.of_map_mode = rt6160_of_map_mode;
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priv->desc.ops = &rt6160_regulator_ops;
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if (priv->vsel_active_low)
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priv->desc.vsel_reg = RT6160_REG_VSELL;
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regulator_cfg.dev = &i2c->dev;
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regulator_cfg.of_node = i2c->dev.of_node;
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regulator_cfg.regmap = priv->regmap;
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regulator_cfg.driver_data = priv;
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regulator_cfg.init_data = of_get_regulator_init_data(&i2c->dev, i2c->dev.of_node,
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&priv->desc);
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rdev = devm_regulator_register(&i2c->dev, &priv->desc, ®ulator_cfg);
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if (IS_ERR(rdev)) {
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dev_err(&i2c->dev, "Failed to register regulator\n");
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return PTR_ERR(rdev);
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}
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return 0;
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}
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static const struct of_device_id __maybe_unused rt6160_of_match_table[] = {
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{ .compatible = "richtek,rt6160", },
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{}
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};
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MODULE_DEVICE_TABLE(of, rt6160_of_match_table);
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static struct i2c_driver rt6160_driver = {
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.driver = {
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.name = "rt6160",
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.of_match_table = rt6160_of_match_table,
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},
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.probe_new = rt6160_probe,
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};
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module_i2c_driver(rt6160_driver);
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MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
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MODULE_LICENSE("GPL v2");
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