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373 lines
10 KiB
373 lines
10 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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#include <linux/bitops.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/of.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/driver.h> |
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enum { |
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RTQ2134_IDX_BUCK1 = 0, |
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RTQ2134_IDX_BUCK2, |
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RTQ2134_IDX_BUCK3, |
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RTQ2134_IDX_MAX |
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}; |
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#define RTQ2134_AUTO_MODE 0 |
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#define RTQ2134_FCCM_MODE 1 |
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#define RTQ2134_BUCK_DVS0_CTRL 0 |
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#define RTQ2134_BUCK_VSEL_CTRL 2 |
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#define RTQ2134_REG_IO_CHIPNAME 0x01 |
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#define RTQ2134_REG_FLT_RECORDTEMP 0x13 |
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#define RTQ2134_REG_FLT_RECORDBUCK(_id) (0x14 + (_id)) |
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#define RTQ2134_REG_FLT_BUCKCTRL(_id) (0x37 + (_id)) |
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#define RTQ2134_REG_BUCK1_CFG0 0x42 |
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#define RTQ2134_REG_BUCK1_DVS0CFG1 0x48 |
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#define RTQ2134_REG_BUCK1_DVS0CFG0 0x49 |
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#define RTQ2134_REG_BUCK1_DVS1CFG1 0x4A |
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#define RTQ2134_REG_BUCK1_DVS1CFG0 0x4B |
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#define RTQ2134_REG_BUCK1_DVSCFG 0x52 |
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#define RTQ2134_REG_BUCK1_RSPCFG 0x54 |
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#define RTQ2134_REG_BUCK2_CFG0 0x5F |
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#define RTQ2134_REG_BUCK2_DVS0CFG1 0x62 |
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#define RTQ2134_REG_BUCK2_DVS0CFG0 0x63 |
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#define RTQ2134_REG_BUCK2_DVS1CFG1 0x64 |
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#define RTQ2134_REG_BUCK2_DVS1CFG0 0x65 |
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#define RTQ2134_REG_BUCK2_DVSCFG 0x6C |
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#define RTQ2134_REG_BUCK2_RSPCFG 0x6E |
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#define RTQ2134_REG_BUCK3_CFG0 0x79 |
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#define RTQ2134_REG_BUCK3_DVS0CFG1 0x7C |
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#define RTQ2134_REG_BUCK3_DVS0CFG0 0x7D |
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#define RTQ2134_REG_BUCK3_DVS1CFG1 0x7E |
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#define RTQ2134_REG_BUCK3_DVS1CFG0 0x7F |
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#define RTQ2134_REG_BUCK3_DVSCFG 0x86 |
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#define RTQ2134_REG_BUCK3_RSPCFG 0x88 |
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#define RTQ2134_REG_BUCK3_SLEWCTRL 0x89 |
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#define RTQ2134_VOUT_MAXNUM 256 |
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#define RTQ2134_VOUT_MASK 0xFF |
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#define RTQ2134_VOUTEN_MASK BIT(0) |
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#define RTQ2134_ACTDISCHG_MASK BIT(0) |
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#define RTQ2134_RSPUP_MASK GENMASK(6, 4) |
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#define RTQ2134_FCCM_MASK BIT(5) |
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#define RTQ2134_UVHICCUP_MASK BIT(3) |
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#define RTQ2134_BUCKDVS_CTRL_MASK GENMASK(1, 0) |
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#define RTQ2134_CHIPOT_MASK BIT(2) |
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#define RTQ2134_BUCKOV_MASK BIT(5) |
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#define RTQ2134_BUCKUV_MASK BIT(4) |
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struct rtq2134_regulator_desc { |
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struct regulator_desc desc; |
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/* Extension for proprietary register and mask */ |
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unsigned int mode_reg; |
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unsigned int mode_mask; |
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unsigned int suspend_enable_reg; |
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unsigned int suspend_enable_mask; |
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unsigned int suspend_vsel_reg; |
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unsigned int suspend_vsel_mask; |
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unsigned int suspend_mode_reg; |
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unsigned int suspend_mode_mask; |
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unsigned int dvs_ctrl_reg; |
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}; |
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static int rtq2134_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) |
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{ |
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struct rtq2134_regulator_desc *desc = |
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(struct rtq2134_regulator_desc *)rdev->desc; |
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unsigned int val; |
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if (mode == REGULATOR_MODE_NORMAL) |
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val = RTQ2134_AUTO_MODE; |
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else if (mode == REGULATOR_MODE_FAST) |
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val = RTQ2134_FCCM_MODE; |
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else |
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return -EINVAL; |
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val <<= ffs(desc->mode_mask) - 1; |
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return regmap_update_bits(rdev->regmap, desc->mode_reg, desc->mode_mask, |
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val); |
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} |
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static unsigned int rtq2134_buck_get_mode(struct regulator_dev *rdev) |
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{ |
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struct rtq2134_regulator_desc *desc = |
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(struct rtq2134_regulator_desc *)rdev->desc; |
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unsigned int mode; |
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int ret; |
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ret = regmap_read(rdev->regmap, desc->mode_reg, &mode); |
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if (ret) |
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return ret; |
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if (mode & desc->mode_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 rtq2134_buck_set_suspend_voltage(struct regulator_dev *rdev, int uV) |
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{ |
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struct rtq2134_regulator_desc *desc = |
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(struct rtq2134_regulator_desc *)rdev->desc; |
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int sel; |
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sel = regulator_map_voltage_linear_range(rdev, uV, uV); |
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if (sel < 0) |
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return sel; |
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sel <<= ffs(desc->suspend_vsel_mask) - 1; |
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return regmap_update_bits(rdev->regmap, desc->suspend_vsel_reg, |
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desc->suspend_vsel_mask, sel); |
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} |
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static int rtq2134_buck_set_suspend_enable(struct regulator_dev *rdev) |
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{ |
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struct rtq2134_regulator_desc *desc = |
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(struct rtq2134_regulator_desc *)rdev->desc; |
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unsigned int val = desc->suspend_enable_mask; |
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return regmap_update_bits(rdev->regmap, desc->suspend_enable_reg, |
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desc->suspend_enable_mask, val); |
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} |
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static int rtq2134_buck_set_suspend_disable(struct regulator_dev *rdev) |
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{ |
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struct rtq2134_regulator_desc *desc = |
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(struct rtq2134_regulator_desc *)rdev->desc; |
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return regmap_update_bits(rdev->regmap, desc->suspend_enable_reg, |
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desc->suspend_enable_mask, 0); |
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} |
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static int rtq2134_buck_set_suspend_mode(struct regulator_dev *rdev, |
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unsigned int mode) |
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{ |
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struct rtq2134_regulator_desc *desc = |
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(struct rtq2134_regulator_desc *)rdev->desc; |
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unsigned int val; |
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if (mode == REGULATOR_MODE_NORMAL) |
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val = RTQ2134_AUTO_MODE; |
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else if (mode == REGULATOR_MODE_FAST) |
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val = RTQ2134_FCCM_MODE; |
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else |
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return -EINVAL; |
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val <<= ffs(desc->suspend_mode_mask) - 1; |
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return regmap_update_bits(rdev->regmap, desc->suspend_mode_reg, |
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desc->suspend_mode_mask, val); |
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} |
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static int rtq2134_buck_get_error_flags(struct regulator_dev *rdev, |
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unsigned int *flags) |
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{ |
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int rid = rdev_get_id(rdev); |
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unsigned int chip_error, buck_error, events = 0; |
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int ret; |
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ret = regmap_read(rdev->regmap, RTQ2134_REG_FLT_RECORDTEMP, |
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&chip_error); |
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if (ret) { |
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dev_err(&rdev->dev, "Failed to get chip error flag\n"); |
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return ret; |
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} |
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ret = regmap_read(rdev->regmap, RTQ2134_REG_FLT_RECORDBUCK(rid), |
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&buck_error); |
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if (ret) { |
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dev_err(&rdev->dev, "Failed to get buck error flag\n"); |
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return ret; |
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} |
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if (chip_error & RTQ2134_CHIPOT_MASK) |
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events |= REGULATOR_ERROR_OVER_TEMP; |
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if (buck_error & RTQ2134_BUCKUV_MASK) |
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events |= REGULATOR_ERROR_UNDER_VOLTAGE; |
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if (buck_error & RTQ2134_BUCKOV_MASK) |
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events |= REGULATOR_ERROR_REGULATION_OUT; |
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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 rtq2134_buck_ops = { |
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.list_voltage = regulator_list_voltage_linear_range, |
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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 = 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_ramp_delay = regulator_set_ramp_delay_regmap, |
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.set_mode = rtq2134_buck_set_mode, |
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.get_mode = rtq2134_buck_get_mode, |
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.set_suspend_voltage = rtq2134_buck_set_suspend_voltage, |
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.set_suspend_enable = rtq2134_buck_set_suspend_enable, |
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.set_suspend_disable = rtq2134_buck_set_suspend_disable, |
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.set_suspend_mode = rtq2134_buck_set_suspend_mode, |
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.get_error_flags = rtq2134_buck_get_error_flags, |
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}; |
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static const struct linear_range rtq2134_buck_vout_ranges[] = { |
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REGULATOR_LINEAR_RANGE(300000, 0, 200, 5000), |
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REGULATOR_LINEAR_RANGE(1310000, 201, 255, 10000) |
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}; |
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static unsigned int rtq2134_buck_of_map_mode(unsigned int mode) |
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{ |
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switch (mode) { |
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case RTQ2134_AUTO_MODE: |
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return REGULATOR_MODE_NORMAL; |
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case RTQ2134_FCCM_MODE: |
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return REGULATOR_MODE_FAST; |
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} |
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return REGULATOR_MODE_INVALID; |
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} |
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static int rtq2134_buck_of_parse_cb(struct device_node *np, |
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const struct regulator_desc *desc, |
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struct regulator_config *cfg) |
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{ |
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struct rtq2134_regulator_desc *rdesc = |
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(struct rtq2134_regulator_desc *)desc; |
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int rid = desc->id; |
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bool uv_shutdown, vsel_dvs; |
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unsigned int val; |
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int ret; |
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vsel_dvs = of_property_read_bool(np, "richtek,use-vsel-dvs"); |
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if (vsel_dvs) |
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val = RTQ2134_BUCK_VSEL_CTRL; |
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else |
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val = RTQ2134_BUCK_DVS0_CTRL; |
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ret = regmap_update_bits(cfg->regmap, rdesc->dvs_ctrl_reg, |
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RTQ2134_BUCKDVS_CTRL_MASK, val); |
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if (ret) |
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return ret; |
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uv_shutdown = of_property_read_bool(np, "richtek,uv-shutdown"); |
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if (uv_shutdown) |
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val = 0; |
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else |
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val = RTQ2134_UVHICCUP_MASK; |
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return regmap_update_bits(cfg->regmap, RTQ2134_REG_FLT_BUCKCTRL(rid), |
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RTQ2134_UVHICCUP_MASK, val); |
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} |
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static const unsigned int rtq2134_buck_ramp_delay_table[] = { |
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0, 16000, 0, 8000, 4000, 2000, 1000, 500 |
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}; |
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#define RTQ2134_BUCK_DESC(_id) { \ |
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.desc = { \ |
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.name = "rtq2134_buck" #_id, \ |
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.of_match = of_match_ptr("buck" #_id), \ |
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.regulators_node = of_match_ptr("regulators"), \ |
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.id = RTQ2134_IDX_BUCK##_id, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.owner = THIS_MODULE, \ |
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.ops = &rtq2134_buck_ops, \ |
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.n_voltages = RTQ2134_VOUT_MAXNUM, \ |
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.linear_ranges = rtq2134_buck_vout_ranges, \ |
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.n_linear_ranges = ARRAY_SIZE(rtq2134_buck_vout_ranges), \ |
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.vsel_reg = RTQ2134_REG_BUCK##_id##_DVS0CFG1, \ |
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.vsel_mask = RTQ2134_VOUT_MASK, \ |
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.enable_reg = RTQ2134_REG_BUCK##_id##_DVS0CFG0, \ |
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.enable_mask = RTQ2134_VOUTEN_MASK, \ |
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.active_discharge_reg = RTQ2134_REG_BUCK##_id##_CFG0, \ |
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.active_discharge_mask = RTQ2134_ACTDISCHG_MASK, \ |
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.ramp_reg = RTQ2134_REG_BUCK##_id##_RSPCFG, \ |
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.ramp_mask = RTQ2134_RSPUP_MASK, \ |
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.ramp_delay_table = rtq2134_buck_ramp_delay_table, \ |
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.n_ramp_values = ARRAY_SIZE(rtq2134_buck_ramp_delay_table), \ |
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.of_map_mode = rtq2134_buck_of_map_mode, \ |
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.of_parse_cb = rtq2134_buck_of_parse_cb, \ |
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}, \ |
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.mode_reg = RTQ2134_REG_BUCK##_id##_DVS0CFG0, \ |
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.mode_mask = RTQ2134_FCCM_MASK, \ |
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.suspend_mode_reg = RTQ2134_REG_BUCK##_id##_DVS1CFG0, \ |
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.suspend_mode_mask = RTQ2134_FCCM_MASK, \ |
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.suspend_enable_reg = RTQ2134_REG_BUCK##_id##_DVS1CFG0, \ |
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.suspend_enable_mask = RTQ2134_VOUTEN_MASK, \ |
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.suspend_vsel_reg = RTQ2134_REG_BUCK##_id##_DVS1CFG1, \ |
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.suspend_vsel_mask = RTQ2134_VOUT_MASK, \ |
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.dvs_ctrl_reg = RTQ2134_REG_BUCK##_id##_DVSCFG, \ |
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} |
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static const struct rtq2134_regulator_desc rtq2134_regulator_descs[] = { |
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RTQ2134_BUCK_DESC(1), |
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RTQ2134_BUCK_DESC(2), |
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RTQ2134_BUCK_DESC(3) |
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}; |
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static bool rtq2134_is_accissible_reg(struct device *dev, unsigned int reg) |
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{ |
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if (reg >= RTQ2134_REG_IO_CHIPNAME && reg <= RTQ2134_REG_BUCK3_SLEWCTRL) |
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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 rtq2134_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.max_register = RTQ2134_REG_BUCK3_SLEWCTRL, |
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.readable_reg = rtq2134_is_accissible_reg, |
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.writeable_reg = rtq2134_is_accissible_reg, |
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}; |
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static int rtq2134_probe(struct i2c_client *i2c) |
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{ |
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struct regmap *regmap; |
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struct regulator_dev *rdev; |
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struct regulator_config regulator_cfg = {}; |
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int i; |
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regmap = devm_regmap_init_i2c(i2c, &rtq2134_regmap_config); |
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if (IS_ERR(regmap)) { |
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dev_err(&i2c->dev, "Failed to allocate regmap\n"); |
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return PTR_ERR(regmap); |
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} |
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regulator_cfg.dev = &i2c->dev; |
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regulator_cfg.regmap = regmap; |
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for (i = 0; i < ARRAY_SIZE(rtq2134_regulator_descs); i++) { |
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rdev = devm_regulator_register(&i2c->dev, |
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&rtq2134_regulator_descs[i].desc, |
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®ulator_cfg); |
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if (IS_ERR(rdev)) { |
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dev_err(&i2c->dev, "Failed to init %d regulator\n", i); |
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return PTR_ERR(rdev); |
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} |
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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 rtq2134_device_tables[] = { |
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{ .compatible = "richtek,rtq2134", }, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(of, rtq2134_device_tables); |
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static struct i2c_driver rtq2134_driver = { |
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.driver = { |
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.name = "rtq2134", |
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.of_match_table = rtq2134_device_tables, |
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}, |
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.probe_new = rtq2134_probe, |
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}; |
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module_i2c_driver(rtq2134_driver); |
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MODULE_AUTHOR("ChiYuan Huang <[email protected]>"); |
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MODULE_DESCRIPTION("Richtek RTQ2134 Regulator Driver"); |
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MODULE_LICENSE("GPL v2");
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