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360 lines
9.2 KiB
360 lines
9.2 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Voltage regulation driver for active-semi ACT8945A PMIC |
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* |
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* Copyright (C) 2015 Atmel Corporation |
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* |
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* Author: Wenyou Yang <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.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/machine.h> |
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#include <dt-bindings/regulator/active-semi,8945a-regulator.h> |
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/** |
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* ACT8945A Global Register Map. |
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*/ |
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#define ACT8945A_SYS_MODE 0x00 |
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#define ACT8945A_SYS_CTRL 0x01 |
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#define ACT8945A_SYS_UNLK_REGS 0x0b |
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#define ACT8945A_DCDC1_VSET1 0x20 |
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#define ACT8945A_DCDC1_VSET2 0x21 |
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#define ACT8945A_DCDC1_CTRL 0x22 |
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#define ACT8945A_DCDC1_SUS 0x24 |
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#define ACT8945A_DCDC2_VSET1 0x30 |
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#define ACT8945A_DCDC2_VSET2 0x31 |
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#define ACT8945A_DCDC2_CTRL 0x32 |
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#define ACT8945A_DCDC2_SUS 0x34 |
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#define ACT8945A_DCDC3_VSET1 0x40 |
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#define ACT8945A_DCDC3_VSET2 0x41 |
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#define ACT8945A_DCDC3_CTRL 0x42 |
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#define ACT8945A_DCDC3_SUS 0x44 |
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#define ACT8945A_LDO1_VSET 0x50 |
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#define ACT8945A_LDO1_CTRL 0x51 |
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#define ACT8945A_LDO1_SUS 0x52 |
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#define ACT8945A_LDO2_VSET 0x54 |
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#define ACT8945A_LDO2_CTRL 0x55 |
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#define ACT8945A_LDO2_SUS 0x56 |
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#define ACT8945A_LDO3_VSET 0x60 |
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#define ACT8945A_LDO3_CTRL 0x61 |
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#define ACT8945A_LDO3_SUS 0x62 |
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#define ACT8945A_LDO4_VSET 0x64 |
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#define ACT8945A_LDO4_CTRL 0x65 |
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#define ACT8945A_LDO4_SUS 0x66 |
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/** |
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* Field Definitions. |
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*/ |
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#define ACT8945A_ENA 0x80 /* ON - [7] */ |
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#define ACT8945A_VSEL_MASK 0x3F /* VSET - [5:0] */ |
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/** |
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* ACT8945A Voltage Number |
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*/ |
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#define ACT8945A_VOLTAGE_NUM 64 |
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enum { |
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ACT8945A_ID_DCDC1, |
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ACT8945A_ID_DCDC2, |
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ACT8945A_ID_DCDC3, |
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ACT8945A_ID_LDO1, |
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ACT8945A_ID_LDO2, |
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ACT8945A_ID_LDO3, |
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ACT8945A_ID_LDO4, |
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ACT8945A_ID_MAX, |
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}; |
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struct act8945a_pmic { |
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struct regmap *regmap; |
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u32 op_mode[ACT8945A_ID_MAX]; |
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}; |
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static const struct linear_range act8945a_voltage_ranges[] = { |
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REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000), |
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REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000), |
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REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), |
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}; |
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static int act8945a_set_suspend_state(struct regulator_dev *rdev, bool enable) |
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{ |
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struct regmap *regmap = rdev->regmap; |
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int id = rdev_get_id(rdev); |
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int reg, val; |
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switch (id) { |
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case ACT8945A_ID_DCDC1: |
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reg = ACT8945A_DCDC1_SUS; |
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val = 0xa8; |
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break; |
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case ACT8945A_ID_DCDC2: |
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reg = ACT8945A_DCDC2_SUS; |
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val = 0xa8; |
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break; |
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case ACT8945A_ID_DCDC3: |
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reg = ACT8945A_DCDC3_SUS; |
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val = 0xa8; |
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break; |
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case ACT8945A_ID_LDO1: |
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reg = ACT8945A_LDO1_SUS; |
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val = 0xe8; |
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break; |
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case ACT8945A_ID_LDO2: |
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reg = ACT8945A_LDO2_SUS; |
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val = 0xe8; |
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break; |
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case ACT8945A_ID_LDO3: |
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reg = ACT8945A_LDO3_SUS; |
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val = 0xe8; |
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break; |
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case ACT8945A_ID_LDO4: |
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reg = ACT8945A_LDO4_SUS; |
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val = 0xe8; |
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break; |
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default: |
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return -EINVAL; |
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} |
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if (enable) |
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val |= BIT(4); |
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/* |
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* Ask the PMIC to enable/disable this output when entering hibernate |
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* mode. |
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*/ |
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return regmap_write(regmap, reg, val); |
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} |
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static int act8945a_set_suspend_enable(struct regulator_dev *rdev) |
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{ |
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return act8945a_set_suspend_state(rdev, true); |
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} |
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static int act8945a_set_suspend_disable(struct regulator_dev *rdev) |
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{ |
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return act8945a_set_suspend_state(rdev, false); |
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} |
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static unsigned int act8945a_of_map_mode(unsigned int mode) |
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{ |
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switch (mode) { |
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case ACT8945A_REGULATOR_MODE_FIXED: |
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case ACT8945A_REGULATOR_MODE_NORMAL: |
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return REGULATOR_MODE_NORMAL; |
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case ACT8945A_REGULATOR_MODE_LOWPOWER: |
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return REGULATOR_MODE_STANDBY; |
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default: |
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return REGULATOR_MODE_INVALID; |
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} |
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} |
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static int act8945a_set_mode(struct regulator_dev *rdev, unsigned int mode) |
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{ |
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struct act8945a_pmic *act8945a = rdev_get_drvdata(rdev); |
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struct regmap *regmap = rdev->regmap; |
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int id = rdev_get_id(rdev); |
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int reg, ret, val = 0; |
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switch (id) { |
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case ACT8945A_ID_DCDC1: |
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reg = ACT8945A_DCDC1_CTRL; |
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break; |
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case ACT8945A_ID_DCDC2: |
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reg = ACT8945A_DCDC2_CTRL; |
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break; |
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case ACT8945A_ID_DCDC3: |
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reg = ACT8945A_DCDC3_CTRL; |
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break; |
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case ACT8945A_ID_LDO1: |
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reg = ACT8945A_LDO1_CTRL; |
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break; |
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case ACT8945A_ID_LDO2: |
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reg = ACT8945A_LDO2_CTRL; |
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break; |
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case ACT8945A_ID_LDO3: |
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reg = ACT8945A_LDO3_CTRL; |
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break; |
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case ACT8945A_ID_LDO4: |
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reg = ACT8945A_LDO4_CTRL; |
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break; |
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default: |
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return -EINVAL; |
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} |
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switch (mode) { |
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case REGULATOR_MODE_STANDBY: |
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if (id > ACT8945A_ID_DCDC3) |
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val = BIT(5); |
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break; |
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case REGULATOR_MODE_NORMAL: |
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if (id <= ACT8945A_ID_DCDC3) |
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val = BIT(5); |
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break; |
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default: |
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return -EINVAL; |
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} |
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ret = regmap_update_bits(regmap, reg, BIT(5), val); |
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if (ret) |
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return ret; |
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act8945a->op_mode[id] = mode; |
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return 0; |
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} |
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static unsigned int act8945a_get_mode(struct regulator_dev *rdev) |
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{ |
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struct act8945a_pmic *act8945a = rdev_get_drvdata(rdev); |
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int id = rdev_get_id(rdev); |
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if (id < ACT8945A_ID_DCDC1 || id >= ACT8945A_ID_MAX) |
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return -EINVAL; |
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return act8945a->op_mode[id]; |
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} |
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static const struct regulator_ops act8945a_ops = { |
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.list_voltage = regulator_list_voltage_linear_range, |
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.map_voltage = regulator_map_voltage_linear_range, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.set_mode = act8945a_set_mode, |
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.get_mode = act8945a_get_mode, |
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.is_enabled = regulator_is_enabled_regmap, |
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.set_suspend_enable = act8945a_set_suspend_enable, |
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.set_suspend_disable = act8945a_set_suspend_disable, |
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}; |
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#define ACT89xx_REG(_name, _family, _id, _vsel_reg, _supply) \ |
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[_family##_ID_##_id] = { \ |
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.name = _name, \ |
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.supply_name = _supply, \ |
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.of_match = of_match_ptr("REG_"#_id), \ |
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.of_map_mode = act8945a_of_map_mode, \ |
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.regulators_node = of_match_ptr("regulators"), \ |
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.id = _family##_ID_##_id, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.ops = &act8945a_ops, \ |
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.n_voltages = ACT8945A_VOLTAGE_NUM, \ |
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.linear_ranges = act8945a_voltage_ranges, \ |
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.n_linear_ranges = ARRAY_SIZE(act8945a_voltage_ranges), \ |
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.vsel_reg = _family##_##_id##_##_vsel_reg, \ |
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.vsel_mask = ACT8945A_VSEL_MASK, \ |
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.enable_reg = _family##_##_id##_CTRL, \ |
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.enable_mask = ACT8945A_ENA, \ |
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.owner = THIS_MODULE, \ |
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} |
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static const struct regulator_desc act8945a_regulators[] = { |
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ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET1, "vp1"), |
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ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET1, "vp2"), |
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ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET1, "vp3"), |
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ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"), |
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ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"), |
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ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"), |
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ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"), |
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}; |
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static const struct regulator_desc act8945a_alt_regulators[] = { |
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ACT89xx_REG("DCDC_REG1", ACT8945A, DCDC1, VSET2, "vp1"), |
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ACT89xx_REG("DCDC_REG2", ACT8945A, DCDC2, VSET2, "vp2"), |
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ACT89xx_REG("DCDC_REG3", ACT8945A, DCDC3, VSET2, "vp3"), |
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ACT89xx_REG("LDO_REG1", ACT8945A, LDO1, VSET, "inl45"), |
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ACT89xx_REG("LDO_REG2", ACT8945A, LDO2, VSET, "inl45"), |
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ACT89xx_REG("LDO_REG3", ACT8945A, LDO3, VSET, "inl67"), |
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ACT89xx_REG("LDO_REG4", ACT8945A, LDO4, VSET, "inl67"), |
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}; |
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static int act8945a_pmic_probe(struct platform_device *pdev) |
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{ |
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struct regulator_config config = { }; |
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const struct regulator_desc *regulators; |
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struct act8945a_pmic *act8945a; |
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struct regulator_dev *rdev; |
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int i, num_regulators; |
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bool voltage_select; |
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act8945a = devm_kzalloc(&pdev->dev, sizeof(*act8945a), GFP_KERNEL); |
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if (!act8945a) |
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return -ENOMEM; |
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act8945a->regmap = dev_get_regmap(pdev->dev.parent, NULL); |
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if (!act8945a->regmap) { |
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dev_err(&pdev->dev, |
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"could not retrieve regmap from parent device\n"); |
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return -EINVAL; |
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} |
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voltage_select = of_property_read_bool(pdev->dev.parent->of_node, |
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"active-semi,vsel-high"); |
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if (voltage_select) { |
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regulators = act8945a_alt_regulators; |
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num_regulators = ARRAY_SIZE(act8945a_alt_regulators); |
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} else { |
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regulators = act8945a_regulators; |
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num_regulators = ARRAY_SIZE(act8945a_regulators); |
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} |
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config.dev = &pdev->dev; |
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config.dev->of_node = pdev->dev.parent->of_node; |
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config.driver_data = act8945a; |
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for (i = 0; i < num_regulators; i++) { |
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rdev = devm_regulator_register(&pdev->dev, ®ulators[i], |
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&config); |
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if (IS_ERR(rdev)) { |
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dev_err(&pdev->dev, |
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"failed to register %s regulator\n", |
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regulators[i].name); |
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return PTR_ERR(rdev); |
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} |
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} |
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platform_set_drvdata(pdev, act8945a); |
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/* Unlock expert registers. */ |
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return regmap_write(act8945a->regmap, ACT8945A_SYS_UNLK_REGS, 0xef); |
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} |
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static int __maybe_unused act8945a_suspend(struct device *pdev) |
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{ |
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struct act8945a_pmic *act8945a = dev_get_drvdata(pdev); |
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/* |
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* Ask the PMIC to enter the suspend mode on the next PWRHLD |
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* transition. |
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*/ |
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return regmap_write(act8945a->regmap, ACT8945A_SYS_CTRL, 0x42); |
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} |
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static SIMPLE_DEV_PM_OPS(act8945a_pm, act8945a_suspend, NULL); |
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static void act8945a_pmic_shutdown(struct platform_device *pdev) |
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{ |
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struct act8945a_pmic *act8945a = platform_get_drvdata(pdev); |
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/* |
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* Ask the PMIC to shutdown everything on the next PWRHLD transition. |
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*/ |
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regmap_write(act8945a->regmap, ACT8945A_SYS_CTRL, 0x0); |
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} |
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static struct platform_driver act8945a_pmic_driver = { |
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.driver = { |
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.name = "act8945a-regulator", |
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.pm = &act8945a_pm, |
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}, |
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.probe = act8945a_pmic_probe, |
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.shutdown = act8945a_pmic_shutdown, |
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}; |
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module_platform_driver(act8945a_pmic_driver); |
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MODULE_DESCRIPTION("Active-semi ACT8945A voltage regulator driver"); |
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MODULE_AUTHOR("Wenyou Yang <[email protected]>"); |
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MODULE_LICENSE("GPL");
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