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676 lines
16 KiB
676 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// FAN53555 Fairchild Digitally Programmable TinyBuck Regulator Driver. |
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// |
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// Supported Part Numbers: |
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// FAN53555UC00X/01X/03X/04X/05X |
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// |
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// Copyright (c) 2012 Marvell Technology Ltd. |
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// Yunfan Zhang <[email protected]> |
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#include <linux/module.h> |
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#include <linux/param.h> |
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#include <linux/err.h> |
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#include <linux/platform_device.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/machine.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/of_device.h> |
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#include <linux/i2c.h> |
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#include <linux/slab.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/fan53555.h> |
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/* Voltage setting */ |
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#define FAN53555_VSEL0 0x00 |
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#define FAN53555_VSEL1 0x01 |
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#define TCS4525_VSEL0 0x11 |
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#define TCS4525_VSEL1 0x10 |
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#define TCS4525_TIME 0x13 |
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#define TCS4525_COMMAND 0x14 |
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/* Control register */ |
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#define FAN53555_CONTROL 0x02 |
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/* IC Type */ |
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#define FAN53555_ID1 0x03 |
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/* IC mask version */ |
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#define FAN53555_ID2 0x04 |
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/* Monitor register */ |
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#define FAN53555_MONITOR 0x05 |
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/* VSEL bit definitions */ |
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#define VSEL_BUCK_EN (1 << 7) |
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#define VSEL_MODE (1 << 6) |
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/* Chip ID and Verison */ |
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#define DIE_ID 0x0F /* ID1 */ |
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#define DIE_REV 0x0F /* ID2 */ |
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/* Control bit definitions */ |
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#define CTL_OUTPUT_DISCHG (1 << 7) |
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#define CTL_SLEW_MASK (0x7 << 4) |
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#define CTL_SLEW_SHIFT 4 |
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#define CTL_RESET (1 << 2) |
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#define CTL_MODE_VSEL0_MODE BIT(0) |
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#define CTL_MODE_VSEL1_MODE BIT(1) |
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#define FAN53555_NVOLTAGES 64 /* Numbers of voltages */ |
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#define FAN53526_NVOLTAGES 128 |
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#define TCS_VSEL0_MODE (1 << 7) |
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#define TCS_VSEL1_MODE (1 << 6) |
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#define TCS_SLEW_SHIFT 3 |
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#define TCS_SLEW_MASK (0x3 < 3) |
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enum fan53555_vendor { |
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FAN53526_VENDOR_FAIRCHILD = 0, |
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FAN53555_VENDOR_FAIRCHILD, |
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FAN53555_VENDOR_SILERGY, |
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FAN53526_VENDOR_TCS, |
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}; |
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enum { |
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FAN53526_CHIP_ID_01 = 1, |
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}; |
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enum { |
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FAN53526_CHIP_REV_08 = 8, |
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}; |
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/* IC Type */ |
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enum { |
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FAN53555_CHIP_ID_00 = 0, |
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FAN53555_CHIP_ID_01, |
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FAN53555_CHIP_ID_02, |
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FAN53555_CHIP_ID_03, |
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FAN53555_CHIP_ID_04, |
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FAN53555_CHIP_ID_05, |
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FAN53555_CHIP_ID_08 = 8, |
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}; |
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enum { |
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TCS4525_CHIP_ID_12 = 12, |
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}; |
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enum { |
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TCS4526_CHIP_ID_00 = 0, |
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}; |
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/* IC mask revision */ |
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enum { |
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FAN53555_CHIP_REV_00 = 0x3, |
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FAN53555_CHIP_REV_13 = 0xf, |
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}; |
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enum { |
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SILERGY_SYR82X = 8, |
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SILERGY_SYR83X = 9, |
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}; |
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struct fan53555_device_info { |
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enum fan53555_vendor vendor; |
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struct device *dev; |
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struct regulator_desc desc; |
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struct regulator_init_data *regulator; |
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/* IC Type and Rev */ |
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int chip_id; |
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int chip_rev; |
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/* Voltage setting register */ |
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unsigned int vol_reg; |
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unsigned int sleep_reg; |
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/* Voltage range and step(linear) */ |
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unsigned int vsel_min; |
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unsigned int vsel_step; |
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unsigned int vsel_count; |
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/* Mode */ |
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unsigned int mode_reg; |
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unsigned int mode_mask; |
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/* Sleep voltage cache */ |
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unsigned int sleep_vol_cache; |
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/* Slew rate */ |
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unsigned int slew_reg; |
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unsigned int slew_mask; |
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const unsigned int *ramp_delay_table; |
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unsigned int n_ramp_values; |
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unsigned int slew_rate; |
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}; |
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static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV) |
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{ |
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struct fan53555_device_info *di = rdev_get_drvdata(rdev); |
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int ret; |
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if (di->sleep_vol_cache == uV) |
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return 0; |
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ret = regulator_map_voltage_linear(rdev, uV, uV); |
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if (ret < 0) |
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return ret; |
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ret = regmap_update_bits(rdev->regmap, di->sleep_reg, |
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di->desc.vsel_mask, ret); |
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if (ret < 0) |
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return ret; |
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/* Cache the sleep voltage setting. |
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* Might not be the real voltage which is rounded */ |
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di->sleep_vol_cache = uV; |
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return 0; |
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} |
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static int fan53555_set_suspend_enable(struct regulator_dev *rdev) |
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{ |
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struct fan53555_device_info *di = rdev_get_drvdata(rdev); |
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return regmap_update_bits(rdev->regmap, di->sleep_reg, |
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VSEL_BUCK_EN, VSEL_BUCK_EN); |
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} |
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static int fan53555_set_suspend_disable(struct regulator_dev *rdev) |
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{ |
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struct fan53555_device_info *di = rdev_get_drvdata(rdev); |
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return regmap_update_bits(rdev->regmap, di->sleep_reg, |
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VSEL_BUCK_EN, 0); |
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} |
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static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode) |
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{ |
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struct fan53555_device_info *di = rdev_get_drvdata(rdev); |
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switch (mode) { |
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case REGULATOR_MODE_FAST: |
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regmap_update_bits(rdev->regmap, di->mode_reg, |
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di->mode_mask, di->mode_mask); |
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break; |
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case REGULATOR_MODE_NORMAL: |
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regmap_update_bits(rdev->regmap, di->vol_reg, di->mode_mask, 0); |
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break; |
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default: |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static unsigned int fan53555_get_mode(struct regulator_dev *rdev) |
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{ |
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struct fan53555_device_info *di = rdev_get_drvdata(rdev); |
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unsigned int val; |
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int ret = 0; |
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ret = regmap_read(rdev->regmap, di->mode_reg, &val); |
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if (ret < 0) |
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return ret; |
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if (val & di->mode_mask) |
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return REGULATOR_MODE_FAST; |
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else |
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return REGULATOR_MODE_NORMAL; |
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} |
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static const unsigned int slew_rates[] = { |
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64000, |
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32000, |
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16000, |
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8000, |
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4000, |
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2000, |
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1000, |
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500, |
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}; |
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static const unsigned int tcs_slew_rates[] = { |
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18700, |
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9300, |
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4600, |
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2300, |
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}; |
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static const struct regulator_ops fan53555_regulator_ops = { |
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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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.set_voltage_time_sel = regulator_set_voltage_time_sel, |
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.map_voltage = regulator_map_voltage_linear, |
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.list_voltage = regulator_list_voltage_linear, |
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.set_suspend_voltage = fan53555_set_suspend_voltage, |
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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_mode = fan53555_set_mode, |
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.get_mode = fan53555_get_mode, |
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.set_ramp_delay = regulator_set_ramp_delay_regmap, |
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.set_suspend_enable = fan53555_set_suspend_enable, |
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.set_suspend_disable = fan53555_set_suspend_disable, |
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}; |
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static int fan53526_voltages_setup_fairchild(struct fan53555_device_info *di) |
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{ |
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/* Init voltage range and step */ |
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switch (di->chip_id) { |
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case FAN53526_CHIP_ID_01: |
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switch (di->chip_rev) { |
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case FAN53526_CHIP_REV_08: |
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di->vsel_min = 600000; |
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di->vsel_step = 6250; |
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break; |
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default: |
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dev_err(di->dev, |
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"Chip ID %d with rev %d not supported!\n", |
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di->chip_id, di->chip_rev); |
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return -EINVAL; |
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} |
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break; |
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default: |
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dev_err(di->dev, |
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"Chip ID %d not supported!\n", di->chip_id); |
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return -EINVAL; |
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} |
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di->slew_reg = FAN53555_CONTROL; |
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di->slew_mask = CTL_SLEW_MASK; |
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di->ramp_delay_table = slew_rates; |
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di->n_ramp_values = ARRAY_SIZE(slew_rates); |
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di->vsel_count = FAN53526_NVOLTAGES; |
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return 0; |
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} |
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static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di) |
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{ |
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/* Init voltage range and step */ |
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switch (di->chip_id) { |
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case FAN53555_CHIP_ID_00: |
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switch (di->chip_rev) { |
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case FAN53555_CHIP_REV_00: |
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di->vsel_min = 600000; |
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di->vsel_step = 10000; |
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break; |
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case FAN53555_CHIP_REV_13: |
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di->vsel_min = 800000; |
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di->vsel_step = 10000; |
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break; |
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default: |
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dev_err(di->dev, |
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"Chip ID %d with rev %d not supported!\n", |
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di->chip_id, di->chip_rev); |
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return -EINVAL; |
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} |
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break; |
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case FAN53555_CHIP_ID_01: |
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case FAN53555_CHIP_ID_03: |
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case FAN53555_CHIP_ID_05: |
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case FAN53555_CHIP_ID_08: |
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di->vsel_min = 600000; |
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di->vsel_step = 10000; |
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break; |
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case FAN53555_CHIP_ID_04: |
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di->vsel_min = 603000; |
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di->vsel_step = 12826; |
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break; |
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default: |
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dev_err(di->dev, |
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"Chip ID %d not supported!\n", di->chip_id); |
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return -EINVAL; |
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} |
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di->slew_reg = FAN53555_CONTROL; |
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di->slew_mask = CTL_SLEW_MASK; |
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di->ramp_delay_table = slew_rates; |
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di->n_ramp_values = ARRAY_SIZE(slew_rates); |
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di->vsel_count = FAN53555_NVOLTAGES; |
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return 0; |
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} |
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static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di) |
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{ |
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/* Init voltage range and step */ |
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switch (di->chip_id) { |
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case SILERGY_SYR82X: |
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case SILERGY_SYR83X: |
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di->vsel_min = 712500; |
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di->vsel_step = 12500; |
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break; |
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default: |
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dev_err(di->dev, |
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"Chip ID %d not supported!\n", di->chip_id); |
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return -EINVAL; |
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} |
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di->slew_reg = FAN53555_CONTROL; |
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di->slew_mask = CTL_SLEW_MASK; |
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di->ramp_delay_table = slew_rates; |
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di->n_ramp_values = ARRAY_SIZE(slew_rates); |
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di->vsel_count = FAN53555_NVOLTAGES; |
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return 0; |
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} |
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static int fan53526_voltages_setup_tcs(struct fan53555_device_info *di) |
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{ |
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switch (di->chip_id) { |
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case TCS4525_CHIP_ID_12: |
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case TCS4526_CHIP_ID_00: |
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di->slew_reg = TCS4525_TIME; |
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di->slew_mask = TCS_SLEW_MASK; |
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di->ramp_delay_table = tcs_slew_rates; |
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di->n_ramp_values = ARRAY_SIZE(tcs_slew_rates); |
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/* Init voltage range and step */ |
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di->vsel_min = 600000; |
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di->vsel_step = 6250; |
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di->vsel_count = FAN53526_NVOLTAGES; |
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break; |
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default: |
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dev_err(di->dev, "Chip ID %d not supported!\n", di->chip_id); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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/* For 00,01,03,05 options: |
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* VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V. |
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* For 04 option: |
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* VOUT = 0.603V + NSELx * 12.826mV, from 0.603 to 1.411V. |
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* */ |
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static int fan53555_device_setup(struct fan53555_device_info *di, |
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struct fan53555_platform_data *pdata) |
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{ |
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int ret = 0; |
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/* Setup voltage control register */ |
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switch (di->vendor) { |
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case FAN53526_VENDOR_FAIRCHILD: |
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case FAN53555_VENDOR_FAIRCHILD: |
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case FAN53555_VENDOR_SILERGY: |
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switch (pdata->sleep_vsel_id) { |
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case FAN53555_VSEL_ID_0: |
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di->sleep_reg = FAN53555_VSEL0; |
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di->vol_reg = FAN53555_VSEL1; |
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break; |
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case FAN53555_VSEL_ID_1: |
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di->sleep_reg = FAN53555_VSEL1; |
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di->vol_reg = FAN53555_VSEL0; |
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break; |
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default: |
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dev_err(di->dev, "Invalid VSEL ID!\n"); |
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return -EINVAL; |
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} |
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break; |
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case FAN53526_VENDOR_TCS: |
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switch (pdata->sleep_vsel_id) { |
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case FAN53555_VSEL_ID_0: |
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di->sleep_reg = TCS4525_VSEL0; |
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di->vol_reg = TCS4525_VSEL1; |
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break; |
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case FAN53555_VSEL_ID_1: |
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di->sleep_reg = TCS4525_VSEL1; |
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di->vol_reg = TCS4525_VSEL0; |
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break; |
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default: |
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dev_err(di->dev, "Invalid VSEL ID!\n"); |
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return -EINVAL; |
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} |
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break; |
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default: |
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dev_err(di->dev, "vendor %d not supported!\n", di->vendor); |
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return -EINVAL; |
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} |
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/* Setup mode control register */ |
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switch (di->vendor) { |
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case FAN53526_VENDOR_FAIRCHILD: |
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di->mode_reg = FAN53555_CONTROL; |
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switch (pdata->sleep_vsel_id) { |
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case FAN53555_VSEL_ID_0: |
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di->mode_mask = CTL_MODE_VSEL1_MODE; |
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break; |
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case FAN53555_VSEL_ID_1: |
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di->mode_mask = CTL_MODE_VSEL0_MODE; |
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break; |
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} |
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break; |
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case FAN53555_VENDOR_FAIRCHILD: |
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case FAN53555_VENDOR_SILERGY: |
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di->mode_reg = di->vol_reg; |
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di->mode_mask = VSEL_MODE; |
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break; |
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case FAN53526_VENDOR_TCS: |
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di->mode_reg = TCS4525_COMMAND; |
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switch (pdata->sleep_vsel_id) { |
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case FAN53555_VSEL_ID_0: |
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di->mode_mask = TCS_VSEL1_MODE; |
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break; |
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case FAN53555_VSEL_ID_1: |
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di->mode_mask = TCS_VSEL0_MODE; |
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break; |
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} |
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break; |
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default: |
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dev_err(di->dev, "vendor %d not supported!\n", di->vendor); |
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return -EINVAL; |
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} |
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/* Setup voltage range */ |
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switch (di->vendor) { |
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case FAN53526_VENDOR_FAIRCHILD: |
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ret = fan53526_voltages_setup_fairchild(di); |
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break; |
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case FAN53555_VENDOR_FAIRCHILD: |
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ret = fan53555_voltages_setup_fairchild(di); |
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break; |
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case FAN53555_VENDOR_SILERGY: |
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ret = fan53555_voltages_setup_silergy(di); |
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break; |
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case FAN53526_VENDOR_TCS: |
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ret = fan53526_voltages_setup_tcs(di); |
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break; |
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default: |
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dev_err(di->dev, "vendor %d not supported!\n", di->vendor); |
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return -EINVAL; |
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} |
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return ret; |
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} |
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static int fan53555_regulator_register(struct fan53555_device_info *di, |
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struct regulator_config *config) |
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{ |
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struct regulator_desc *rdesc = &di->desc; |
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struct regulator_dev *rdev; |
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rdesc->name = "fan53555-reg"; |
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rdesc->supply_name = "vin"; |
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rdesc->ops = &fan53555_regulator_ops; |
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rdesc->type = REGULATOR_VOLTAGE; |
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rdesc->n_voltages = di->vsel_count; |
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rdesc->enable_reg = di->vol_reg; |
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rdesc->enable_mask = VSEL_BUCK_EN; |
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rdesc->min_uV = di->vsel_min; |
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rdesc->uV_step = di->vsel_step; |
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rdesc->vsel_reg = di->vol_reg; |
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rdesc->vsel_mask = di->vsel_count - 1; |
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rdesc->ramp_reg = di->slew_reg; |
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rdesc->ramp_mask = di->slew_mask; |
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rdesc->ramp_delay_table = di->ramp_delay_table; |
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rdesc->n_ramp_values = di->n_ramp_values; |
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rdesc->owner = THIS_MODULE; |
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rdev = devm_regulator_register(di->dev, &di->desc, config); |
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return PTR_ERR_OR_ZERO(rdev); |
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} |
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static const struct regmap_config fan53555_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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}; |
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static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev, |
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struct device_node *np, |
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const struct regulator_desc *desc) |
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{ |
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struct fan53555_platform_data *pdata; |
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int ret; |
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u32 tmp; |
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pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); |
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if (!pdata) |
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return NULL; |
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pdata->regulator = of_get_regulator_init_data(dev, np, desc); |
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ret = of_property_read_u32(np, "fcs,suspend-voltage-selector", |
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&tmp); |
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if (!ret) |
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pdata->sleep_vsel_id = tmp; |
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return pdata; |
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} |
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static const struct of_device_id __maybe_unused fan53555_dt_ids[] = { |
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{ |
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.compatible = "fcs,fan53526", |
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.data = (void *)FAN53526_VENDOR_FAIRCHILD, |
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}, { |
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.compatible = "fcs,fan53555", |
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.data = (void *)FAN53555_VENDOR_FAIRCHILD |
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}, { |
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.compatible = "silergy,syr827", |
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.data = (void *)FAN53555_VENDOR_SILERGY, |
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}, { |
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.compatible = "silergy,syr828", |
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.data = (void *)FAN53555_VENDOR_SILERGY, |
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}, { |
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.compatible = "tcs,tcs4525", |
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.data = (void *)FAN53526_VENDOR_TCS |
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}, { |
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.compatible = "tcs,tcs4526", |
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.data = (void *)FAN53526_VENDOR_TCS |
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}, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, fan53555_dt_ids); |
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|
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static int fan53555_regulator_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct device_node *np = client->dev.of_node; |
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struct fan53555_device_info *di; |
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struct fan53555_platform_data *pdata; |
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struct regulator_config config = { }; |
|
struct regmap *regmap; |
|
unsigned int val; |
|
int ret; |
|
|
|
di = devm_kzalloc(&client->dev, sizeof(struct fan53555_device_info), |
|
GFP_KERNEL); |
|
if (!di) |
|
return -ENOMEM; |
|
|
|
pdata = dev_get_platdata(&client->dev); |
|
if (!pdata) |
|
pdata = fan53555_parse_dt(&client->dev, np, &di->desc); |
|
|
|
if (!pdata || !pdata->regulator) { |
|
dev_err(&client->dev, "Platform data not found!\n"); |
|
return -ENODEV; |
|
} |
|
|
|
di->regulator = pdata->regulator; |
|
if (client->dev.of_node) { |
|
di->vendor = |
|
(unsigned long)of_device_get_match_data(&client->dev); |
|
} else { |
|
/* if no ramp constraint set, get the pdata ramp_delay */ |
|
if (!di->regulator->constraints.ramp_delay) { |
|
if (pdata->slew_rate >= ARRAY_SIZE(slew_rates)) { |
|
dev_err(&client->dev, "Invalid slew_rate\n"); |
|
return -EINVAL; |
|
} |
|
|
|
di->regulator->constraints.ramp_delay |
|
= slew_rates[pdata->slew_rate]; |
|
} |
|
|
|
di->vendor = id->driver_data; |
|
} |
|
|
|
regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config); |
|
if (IS_ERR(regmap)) { |
|
dev_err(&client->dev, "Failed to allocate regmap!\n"); |
|
return PTR_ERR(regmap); |
|
} |
|
di->dev = &client->dev; |
|
i2c_set_clientdata(client, di); |
|
/* Get chip ID */ |
|
ret = regmap_read(regmap, FAN53555_ID1, &val); |
|
if (ret < 0) { |
|
dev_err(&client->dev, "Failed to get chip ID!\n"); |
|
return ret; |
|
} |
|
di->chip_id = val & DIE_ID; |
|
/* Get chip revision */ |
|
ret = regmap_read(regmap, FAN53555_ID2, &val); |
|
if (ret < 0) { |
|
dev_err(&client->dev, "Failed to get chip Rev!\n"); |
|
return ret; |
|
} |
|
di->chip_rev = val & DIE_REV; |
|
dev_info(&client->dev, "FAN53555 Option[%d] Rev[%d] Detected!\n", |
|
di->chip_id, di->chip_rev); |
|
/* Device init */ |
|
ret = fan53555_device_setup(di, pdata); |
|
if (ret < 0) { |
|
dev_err(&client->dev, "Failed to setup device!\n"); |
|
return ret; |
|
} |
|
/* Register regulator */ |
|
config.dev = di->dev; |
|
config.init_data = di->regulator; |
|
config.regmap = regmap; |
|
config.driver_data = di; |
|
config.of_node = np; |
|
|
|
ret = fan53555_regulator_register(di, &config); |
|
if (ret < 0) |
|
dev_err(&client->dev, "Failed to register regulator!\n"); |
|
return ret; |
|
|
|
} |
|
|
|
static const struct i2c_device_id fan53555_id[] = { |
|
{ |
|
.name = "fan53526", |
|
.driver_data = FAN53526_VENDOR_FAIRCHILD |
|
}, { |
|
.name = "fan53555", |
|
.driver_data = FAN53555_VENDOR_FAIRCHILD |
|
}, { |
|
.name = "syr827", |
|
.driver_data = FAN53555_VENDOR_SILERGY |
|
}, { |
|
.name = "syr828", |
|
.driver_data = FAN53555_VENDOR_SILERGY |
|
}, { |
|
.name = "tcs4525", |
|
.driver_data = FAN53526_VENDOR_TCS |
|
}, { |
|
.name = "tcs4526", |
|
.driver_data = FAN53526_VENDOR_TCS |
|
}, |
|
{ }, |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, fan53555_id); |
|
|
|
static struct i2c_driver fan53555_regulator_driver = { |
|
.driver = { |
|
.name = "fan53555-regulator", |
|
.of_match_table = of_match_ptr(fan53555_dt_ids), |
|
}, |
|
.probe = fan53555_regulator_probe, |
|
.id_table = fan53555_id, |
|
}; |
|
|
|
module_i2c_driver(fan53555_regulator_driver); |
|
|
|
MODULE_AUTHOR("Yunfan Zhang <[email protected]>"); |
|
MODULE_DESCRIPTION("FAN53555 regulator driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|