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675 lines
16 KiB
675 lines
16 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// wm831x-ldo.c -- LDO driver for the WM831x series |
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// |
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// Copyright 2009 Wolfson Microelectronics PLC. |
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// |
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// Author: Mark Brown <[email protected]> |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/init.h> |
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#include <linux/bitops.h> |
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#include <linux/err.h> |
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#include <linux/i2c.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/slab.h> |
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#include <linux/mfd/wm831x/core.h> |
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#include <linux/mfd/wm831x/regulator.h> |
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#include <linux/mfd/wm831x/pdata.h> |
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#define WM831X_LDO_MAX_NAME 9 |
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#define WM831X_LDO_CONTROL 0 |
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#define WM831X_LDO_ON_CONTROL 1 |
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#define WM831X_LDO_SLEEP_CONTROL 2 |
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#define WM831X_ALIVE_LDO_ON_CONTROL 0 |
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#define WM831X_ALIVE_LDO_SLEEP_CONTROL 1 |
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struct wm831x_ldo { |
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char name[WM831X_LDO_MAX_NAME]; |
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char supply_name[WM831X_LDO_MAX_NAME]; |
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struct regulator_desc desc; |
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int base; |
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struct wm831x *wm831x; |
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struct regulator_dev *regulator; |
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}; |
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/* |
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* Shared |
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*/ |
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static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data) |
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{ |
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struct wm831x_ldo *ldo = data; |
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regulator_notifier_call_chain(ldo->regulator, |
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REGULATOR_EVENT_UNDER_VOLTAGE, |
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NULL); |
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return IRQ_HANDLED; |
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} |
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/* |
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* General purpose LDOs |
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*/ |
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static const struct linear_range wm831x_gp_ldo_ranges[] = { |
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REGULATOR_LINEAR_RANGE(900000, 0, 14, 50000), |
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REGULATOR_LINEAR_RANGE(1700000, 15, 31, 100000), |
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}; |
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static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, |
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int uV) |
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{ |
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
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struct wm831x *wm831x = ldo->wm831x; |
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int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; |
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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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return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel); |
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} |
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static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev) |
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{ |
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
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struct wm831x *wm831x = ldo->wm831x; |
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int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; |
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int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
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int ret; |
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ret = wm831x_reg_read(wm831x, on_reg); |
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if (ret < 0) |
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return ret; |
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if (!(ret & WM831X_LDO1_ON_MODE)) |
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return REGULATOR_MODE_NORMAL; |
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ret = wm831x_reg_read(wm831x, ctrl_reg); |
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if (ret < 0) |
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return ret; |
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if (ret & WM831X_LDO1_LP_MODE) |
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return REGULATOR_MODE_STANDBY; |
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else |
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return REGULATOR_MODE_IDLE; |
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} |
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static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev, |
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unsigned int mode) |
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{ |
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
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struct wm831x *wm831x = ldo->wm831x; |
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int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; |
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int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
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int ret; |
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switch (mode) { |
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case REGULATOR_MODE_NORMAL: |
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ret = wm831x_set_bits(wm831x, on_reg, |
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WM831X_LDO1_ON_MODE, 0); |
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if (ret < 0) |
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return ret; |
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break; |
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case REGULATOR_MODE_IDLE: |
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ret = wm831x_set_bits(wm831x, ctrl_reg, |
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WM831X_LDO1_LP_MODE, 0); |
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if (ret < 0) |
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return ret; |
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ret = wm831x_set_bits(wm831x, on_reg, |
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WM831X_LDO1_ON_MODE, |
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WM831X_LDO1_ON_MODE); |
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if (ret < 0) |
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return ret; |
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break; |
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case REGULATOR_MODE_STANDBY: |
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ret = wm831x_set_bits(wm831x, ctrl_reg, |
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WM831X_LDO1_LP_MODE, |
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WM831X_LDO1_LP_MODE); |
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if (ret < 0) |
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return ret; |
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ret = wm831x_set_bits(wm831x, on_reg, |
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WM831X_LDO1_ON_MODE, |
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WM831X_LDO1_ON_MODE); |
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if (ret < 0) |
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return ret; |
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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 int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) |
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{ |
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
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struct wm831x *wm831x = ldo->wm831x; |
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int mask = 1 << rdev_get_id(rdev); |
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int ret; |
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/* Is the regulator on? */ |
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ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); |
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if (ret < 0) |
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return ret; |
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if (!(ret & mask)) |
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return REGULATOR_STATUS_OFF; |
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/* Is it reporting under voltage? */ |
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ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); |
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if (ret < 0) |
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return ret; |
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if (ret & mask) |
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return REGULATOR_STATUS_ERROR; |
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ret = wm831x_gp_ldo_get_mode(rdev); |
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if (ret < 0) |
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return ret; |
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else |
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return regulator_mode_to_status(ret); |
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} |
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static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, |
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int input_uV, |
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int output_uV, int load_uA) |
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{ |
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if (load_uA < 20000) |
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return REGULATOR_MODE_STANDBY; |
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if (load_uA < 50000) |
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return REGULATOR_MODE_IDLE; |
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return REGULATOR_MODE_NORMAL; |
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} |
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static const struct regulator_ops wm831x_gp_ldo_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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.set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, |
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.get_mode = wm831x_gp_ldo_get_mode, |
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.set_mode = wm831x_gp_ldo_set_mode, |
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.get_status = wm831x_gp_ldo_get_status, |
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.get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, |
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.get_bypass = regulator_get_bypass_regmap, |
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.set_bypass = regulator_set_bypass_regmap, |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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}; |
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static int wm831x_gp_ldo_probe(struct platform_device *pdev) |
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{ |
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struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
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struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); |
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struct regulator_config config = { }; |
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int id; |
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struct wm831x_ldo *ldo; |
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struct resource *res; |
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int ret, irq; |
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if (pdata && pdata->wm831x_num) |
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id = (pdata->wm831x_num * 10) + 1; |
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else |
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id = 0; |
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id = pdev->id - id; |
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dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
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ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
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if (!ldo) |
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return -ENOMEM; |
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ldo->wm831x = wm831x; |
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res = platform_get_resource(pdev, IORESOURCE_REG, 0); |
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if (res == NULL) { |
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dev_err(&pdev->dev, "No REG resource\n"); |
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ret = -EINVAL; |
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goto err; |
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} |
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ldo->base = res->start; |
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snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); |
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ldo->desc.name = ldo->name; |
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snprintf(ldo->supply_name, sizeof(ldo->supply_name), |
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"LDO%dVDD", id + 1); |
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ldo->desc.supply_name = ldo->supply_name; |
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ldo->desc.id = id; |
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ldo->desc.type = REGULATOR_VOLTAGE; |
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ldo->desc.n_voltages = 32; |
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ldo->desc.ops = &wm831x_gp_ldo_ops; |
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ldo->desc.owner = THIS_MODULE; |
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ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
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ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK; |
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ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
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ldo->desc.enable_mask = 1 << id; |
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ldo->desc.bypass_reg = ldo->base; |
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ldo->desc.bypass_mask = WM831X_LDO1_SWI; |
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ldo->desc.linear_ranges = wm831x_gp_ldo_ranges; |
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ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_gp_ldo_ranges); |
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config.dev = pdev->dev.parent; |
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if (pdata) |
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config.init_data = pdata->ldo[id]; |
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config.driver_data = ldo; |
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config.regmap = wm831x->regmap; |
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ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc, |
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&config); |
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if (IS_ERR(ldo->regulator)) { |
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ret = PTR_ERR(ldo->regulator); |
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dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", |
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id + 1, ret); |
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goto err; |
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} |
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irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
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ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
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wm831x_ldo_uv_irq, |
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IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
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ldo->name, |
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ldo); |
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if (ret != 0) { |
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dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", |
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irq, ret); |
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goto err; |
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} |
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platform_set_drvdata(pdev, ldo); |
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return 0; |
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err: |
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return ret; |
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} |
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static struct platform_driver wm831x_gp_ldo_driver = { |
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.probe = wm831x_gp_ldo_probe, |
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.driver = { |
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.name = "wm831x-ldo", |
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}, |
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}; |
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/* |
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* Analogue LDOs |
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*/ |
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static const struct linear_range wm831x_aldo_ranges[] = { |
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REGULATOR_LINEAR_RANGE(1000000, 0, 12, 50000), |
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REGULATOR_LINEAR_RANGE(1700000, 13, 31, 100000), |
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}; |
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static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, |
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int uV) |
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{ |
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
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struct wm831x *wm831x = ldo->wm831x; |
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int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; |
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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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return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel); |
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} |
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static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) |
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{ |
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
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struct wm831x *wm831x = ldo->wm831x; |
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int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
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int ret; |
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ret = wm831x_reg_read(wm831x, on_reg); |
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if (ret < 0) |
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return 0; |
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if (ret & WM831X_LDO7_ON_MODE) |
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return REGULATOR_MODE_IDLE; |
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else |
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return REGULATOR_MODE_NORMAL; |
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} |
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static int wm831x_aldo_set_mode(struct regulator_dev *rdev, |
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unsigned int mode) |
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{ |
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
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struct wm831x *wm831x = ldo->wm831x; |
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int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
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int ret; |
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switch (mode) { |
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case REGULATOR_MODE_NORMAL: |
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ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, 0); |
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if (ret < 0) |
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return ret; |
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break; |
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case REGULATOR_MODE_IDLE: |
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ret = wm831x_set_bits(wm831x, on_reg, WM831X_LDO7_ON_MODE, |
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WM831X_LDO7_ON_MODE); |
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if (ret < 0) |
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return ret; |
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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 int wm831x_aldo_get_status(struct regulator_dev *rdev) |
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{ |
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
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struct wm831x *wm831x = ldo->wm831x; |
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int mask = 1 << rdev_get_id(rdev); |
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int ret; |
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/* Is the regulator on? */ |
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ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); |
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if (ret < 0) |
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return ret; |
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if (!(ret & mask)) |
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return REGULATOR_STATUS_OFF; |
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/* Is it reporting under voltage? */ |
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ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); |
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if (ret < 0) |
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return ret; |
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if (ret & mask) |
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return REGULATOR_STATUS_ERROR; |
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ret = wm831x_aldo_get_mode(rdev); |
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if (ret < 0) |
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return ret; |
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else |
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return regulator_mode_to_status(ret); |
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} |
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static const struct regulator_ops wm831x_aldo_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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.set_suspend_voltage = wm831x_aldo_set_suspend_voltage, |
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.get_mode = wm831x_aldo_get_mode, |
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.set_mode = wm831x_aldo_set_mode, |
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.get_status = wm831x_aldo_get_status, |
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.set_bypass = regulator_set_bypass_regmap, |
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.get_bypass = regulator_get_bypass_regmap, |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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}; |
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static int wm831x_aldo_probe(struct platform_device *pdev) |
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{ |
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struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
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struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); |
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struct regulator_config config = { }; |
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int id; |
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struct wm831x_ldo *ldo; |
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struct resource *res; |
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int ret, irq; |
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if (pdata && pdata->wm831x_num) |
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id = (pdata->wm831x_num * 10) + 1; |
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else |
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id = 0; |
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id = pdev->id - id; |
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dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
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ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
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if (!ldo) |
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return -ENOMEM; |
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ldo->wm831x = wm831x; |
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res = platform_get_resource(pdev, IORESOURCE_REG, 0); |
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if (res == NULL) { |
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dev_err(&pdev->dev, "No REG resource\n"); |
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ret = -EINVAL; |
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goto err; |
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} |
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ldo->base = res->start; |
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snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); |
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ldo->desc.name = ldo->name; |
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snprintf(ldo->supply_name, sizeof(ldo->supply_name), |
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"LDO%dVDD", id + 1); |
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ldo->desc.supply_name = ldo->supply_name; |
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ldo->desc.id = id; |
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ldo->desc.type = REGULATOR_VOLTAGE; |
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ldo->desc.n_voltages = 32; |
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ldo->desc.linear_ranges = wm831x_aldo_ranges; |
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ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_aldo_ranges); |
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ldo->desc.ops = &wm831x_aldo_ops; |
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ldo->desc.owner = THIS_MODULE; |
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ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL; |
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ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK; |
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ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
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ldo->desc.enable_mask = 1 << id; |
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ldo->desc.bypass_reg = ldo->base; |
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ldo->desc.bypass_mask = WM831X_LDO7_SWI; |
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config.dev = pdev->dev.parent; |
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if (pdata) |
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config.init_data = pdata->ldo[id]; |
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config.driver_data = ldo; |
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config.regmap = wm831x->regmap; |
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ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc, |
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&config); |
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if (IS_ERR(ldo->regulator)) { |
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ret = PTR_ERR(ldo->regulator); |
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dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", |
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id + 1, ret); |
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goto err; |
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} |
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irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV")); |
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ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, |
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wm831x_ldo_uv_irq, |
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IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
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ldo->name, ldo); |
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if (ret != 0) { |
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dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", |
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irq, ret); |
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goto err; |
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} |
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platform_set_drvdata(pdev, ldo); |
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|
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return 0; |
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|
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err: |
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return ret; |
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} |
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|
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static struct platform_driver wm831x_aldo_driver = { |
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.probe = wm831x_aldo_probe, |
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.driver = { |
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.name = "wm831x-aldo", |
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}, |
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}; |
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|
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/* |
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* Alive LDO |
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*/ |
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#define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf |
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static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, |
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int uV) |
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{ |
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
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struct wm831x *wm831x = ldo->wm831x; |
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int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; |
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sel = regulator_map_voltage_linear(rdev, uV, uV); |
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if (sel < 0) |
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return sel; |
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return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel); |
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} |
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static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) |
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{ |
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); |
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struct wm831x *wm831x = ldo->wm831x; |
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int mask = 1 << rdev_get_id(rdev); |
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int ret; |
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/* Is the regulator on? */ |
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ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); |
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if (ret < 0) |
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return ret; |
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if (ret & mask) |
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return REGULATOR_STATUS_ON; |
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else |
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return REGULATOR_STATUS_OFF; |
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} |
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static const struct regulator_ops wm831x_alive_ldo_ops = { |
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.list_voltage = regulator_list_voltage_linear, |
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.map_voltage = regulator_map_voltage_linear, |
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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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.set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, |
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.get_status = wm831x_alive_ldo_get_status, |
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.is_enabled = regulator_is_enabled_regmap, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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}; |
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static int wm831x_alive_ldo_probe(struct platform_device *pdev) |
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{ |
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struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
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struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev); |
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struct regulator_config config = { }; |
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int id; |
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struct wm831x_ldo *ldo; |
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struct resource *res; |
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int ret; |
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if (pdata && pdata->wm831x_num) |
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id = (pdata->wm831x_num * 10) + 1; |
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else |
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id = 0; |
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id = pdev->id - id; |
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dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); |
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ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL); |
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if (!ldo) |
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return -ENOMEM; |
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ldo->wm831x = wm831x; |
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res = platform_get_resource(pdev, IORESOURCE_REG, 0); |
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if (res == NULL) { |
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dev_err(&pdev->dev, "No REG resource\n"); |
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ret = -EINVAL; |
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goto err; |
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} |
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ldo->base = res->start; |
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snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); |
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ldo->desc.name = ldo->name; |
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snprintf(ldo->supply_name, sizeof(ldo->supply_name), |
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"LDO%dVDD", id + 1); |
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ldo->desc.supply_name = ldo->supply_name; |
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ldo->desc.id = id; |
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ldo->desc.type = REGULATOR_VOLTAGE; |
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ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; |
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ldo->desc.ops = &wm831x_alive_ldo_ops; |
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ldo->desc.owner = THIS_MODULE; |
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ldo->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; |
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ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK; |
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ldo->desc.enable_reg = WM831X_LDO_ENABLE; |
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ldo->desc.enable_mask = 1 << id; |
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ldo->desc.min_uV = 800000; |
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ldo->desc.uV_step = 50000; |
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ldo->desc.enable_time = 1000; |
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config.dev = pdev->dev.parent; |
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if (pdata) |
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config.init_data = pdata->ldo[id]; |
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config.driver_data = ldo; |
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config.regmap = wm831x->regmap; |
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ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc, |
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&config); |
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if (IS_ERR(ldo->regulator)) { |
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ret = PTR_ERR(ldo->regulator); |
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dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", |
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id + 1, ret); |
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goto err; |
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} |
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platform_set_drvdata(pdev, ldo); |
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return 0; |
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err: |
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return ret; |
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} |
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static struct platform_driver wm831x_alive_ldo_driver = { |
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.probe = wm831x_alive_ldo_probe, |
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.driver = { |
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.name = "wm831x-alive-ldo", |
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}, |
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}; |
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static struct platform_driver * const drivers[] = { |
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&wm831x_gp_ldo_driver, |
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&wm831x_aldo_driver, |
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&wm831x_alive_ldo_driver, |
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}; |
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static int __init wm831x_ldo_init(void) |
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{ |
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return platform_register_drivers(drivers, ARRAY_SIZE(drivers)); |
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} |
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subsys_initcall(wm831x_ldo_init); |
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static void __exit wm831x_ldo_exit(void) |
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{ |
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platform_unregister_drivers(drivers, ARRAY_SIZE(drivers)); |
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} |
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module_exit(wm831x_ldo_exit); |
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/* Module information */ |
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MODULE_AUTHOR("Mark Brown <[email protected]>"); |
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MODULE_DESCRIPTION("WM831x LDO driver"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:wm831x-ldo"); |
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MODULE_ALIAS("platform:wm831x-aldo"); |
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MODULE_ALIAS("platform:wm831x-aliveldo");
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