diff options
Diffstat (limited to 'drivers/regulator/wm831x-ldo.c')
| -rw-r--r-- | drivers/regulator/wm831x-ldo.c | 852 |
1 files changed, 852 insertions, 0 deletions
diff --git a/drivers/regulator/wm831x-ldo.c b/drivers/regulator/wm831x-ldo.c new file mode 100644 index 00000000000..bb61aede480 --- /dev/null +++ b/drivers/regulator/wm831x-ldo.c @@ -0,0 +1,852 @@ +/* + * wm831x-ldo.c -- LDO driver for the WM831x series + * + * Copyright 2009 Wolfson Microelectronics PLC. + * + * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/init.h> +#include <linux/bitops.h> +#include <linux/err.h> +#include <linux/i2c.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> + +#include <linux/mfd/wm831x/core.h> +#include <linux/mfd/wm831x/regulator.h> +#include <linux/mfd/wm831x/pdata.h> + +#define WM831X_LDO_MAX_NAME 6 + +#define WM831X_LDO_CONTROL 0 +#define WM831X_LDO_ON_CONTROL 1 +#define WM831X_LDO_SLEEP_CONTROL 2 + +#define WM831X_ALIVE_LDO_ON_CONTROL 0 +#define WM831X_ALIVE_LDO_SLEEP_CONTROL 1 + +struct wm831x_ldo { + char name[WM831X_LDO_MAX_NAME]; + struct regulator_desc desc; + int base; + struct wm831x *wm831x; + struct regulator_dev *regulator; +}; + +/* + * Shared + */ + +static int wm831x_ldo_is_enabled(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int mask = 1 << rdev_get_id(rdev); + int reg; + + reg = wm831x_reg_read(wm831x, WM831X_LDO_ENABLE); + if (reg < 0) + return reg; + + if (reg & mask) + return 1; + else + return 0; +} + +static int wm831x_ldo_enable(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int mask = 1 << rdev_get_id(rdev); + + return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, mask); +} + +static int wm831x_ldo_disable(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int mask = 1 << rdev_get_id(rdev); + + return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, 0); +} + +static irqreturn_t wm831x_ldo_uv_irq(int irq, void *data) +{ + struct wm831x_ldo *ldo = data; + + regulator_notifier_call_chain(ldo->regulator, + REGULATOR_EVENT_UNDER_VOLTAGE, + NULL); + + return IRQ_HANDLED; +} + +/* + * General purpose LDOs + */ + +#define WM831X_GP_LDO_SELECTOR_LOW 0xe +#define WM831X_GP_LDO_MAX_SELECTOR 0x1f + +static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev, + unsigned int selector) +{ + /* 0.9-1.6V in 50mV steps */ + if (selector <= WM831X_GP_LDO_SELECTOR_LOW) + return 900000 + (selector * 50000); + /* 1.7-3.3V in 50mV steps */ + if (selector <= WM831X_GP_LDO_MAX_SELECTOR) + return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW) + * 100000); + return -EINVAL; +} + +static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg, + int min_uV, int max_uV) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int vsel, ret; + + if (min_uV < 900000) + vsel = 0; + else if (min_uV < 1700000) + vsel = ((min_uV - 900000) / 50000); + else + vsel = ((min_uV - 1700000) / 100000) + + WM831X_GP_LDO_SELECTOR_LOW + 1; + + ret = wm831x_gp_ldo_list_voltage(rdev, vsel); + if (ret < 0) + return ret; + if (ret < min_uV || ret > max_uV) + return -EINVAL; + + return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel); +} + +static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + int reg = ldo->base + WM831X_LDO_ON_CONTROL; + + return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV); +} + +static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev, + int uV) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; + + return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV); +} + +static int wm831x_gp_ldo_get_voltage(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int reg = ldo->base + WM831X_LDO_ON_CONTROL; + int ret; + + ret = wm831x_reg_read(wm831x, reg); + if (ret < 0) + return ret; + + ret &= WM831X_LDO1_ON_VSEL_MASK; + + return wm831x_gp_ldo_list_voltage(rdev, ret); +} + +static unsigned int wm831x_gp_ldo_get_mode(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; + int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; + unsigned int ret; + + ret = wm831x_reg_read(wm831x, on_reg); + if (ret < 0) + return 0; + + if (!(ret & WM831X_LDO1_ON_MODE)) + return REGULATOR_MODE_NORMAL; + + ret = wm831x_reg_read(wm831x, ctrl_reg); + if (ret < 0) + return 0; + + if (ret & WM831X_LDO1_LP_MODE) + return REGULATOR_MODE_STANDBY; + else + return REGULATOR_MODE_IDLE; +} + +static int wm831x_gp_ldo_set_mode(struct regulator_dev *rdev, + unsigned int mode) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; + int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; + int ret; + + + switch (mode) { + case REGULATOR_MODE_NORMAL: + ret = wm831x_set_bits(wm831x, on_reg, + WM831X_LDO1_ON_MODE, 0); + if (ret < 0) + return ret; + break; + + case REGULATOR_MODE_IDLE: + ret = wm831x_set_bits(wm831x, ctrl_reg, + WM831X_LDO1_LP_MODE, + WM831X_LDO1_LP_MODE); + if (ret < 0) + return ret; + + ret = wm831x_set_bits(wm831x, on_reg, + WM831X_LDO1_ON_MODE, + WM831X_LDO1_ON_MODE); + if (ret < 0) + return ret; + + case REGULATOR_MODE_STANDBY: + ret = wm831x_set_bits(wm831x, ctrl_reg, + WM831X_LDO1_LP_MODE, 0); + if (ret < 0) + return ret; + + ret = wm831x_set_bits(wm831x, on_reg, + WM831X_LDO1_ON_MODE, + WM831X_LDO1_ON_MODE); + if (ret < 0) + return ret; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int wm831x_gp_ldo_get_status(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int mask = 1 << rdev_get_id(rdev); + int ret; + + /* Is the regulator on? */ + ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); + if (ret < 0) + return ret; + if (!(ret & mask)) + return REGULATOR_STATUS_OFF; + + /* Is it reporting under voltage? */ + ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); + if (ret & mask) + return REGULATOR_STATUS_ERROR; + + ret = wm831x_gp_ldo_get_mode(rdev); + if (ret < 0) + return ret; + else + return regulator_mode_to_status(ret); +} + +static unsigned int wm831x_gp_ldo_get_optimum_mode(struct regulator_dev *rdev, + int input_uV, + int output_uV, int load_uA) +{ + if (load_uA < 20000) + return REGULATOR_MODE_STANDBY; + if (load_uA < 50000) + return REGULATOR_MODE_IDLE; + return REGULATOR_MODE_NORMAL; +} + + +static struct regulator_ops wm831x_gp_ldo_ops = { + .list_voltage = wm831x_gp_ldo_list_voltage, + .get_voltage = wm831x_gp_ldo_get_voltage, + .set_voltage = wm831x_gp_ldo_set_voltage, + .set_suspend_voltage = wm831x_gp_ldo_set_suspend_voltage, + .get_mode = wm831x_gp_ldo_get_mode, + .set_mode = wm831x_gp_ldo_set_mode, + .get_status = wm831x_gp_ldo_get_status, + .get_optimum_mode = wm831x_gp_ldo_get_optimum_mode, + + .is_enabled = wm831x_ldo_is_enabled, + .enable = wm831x_ldo_enable, + .disable = wm831x_ldo_disable, +}; + +static __devinit int wm831x_gp_ldo_probe(struct platform_device *pdev) +{ + struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); + struct wm831x_pdata *pdata = wm831x->dev->platform_data; + int id = pdev->id % ARRAY_SIZE(pdata->ldo); + struct wm831x_ldo *ldo; + struct resource *res; + int ret, irq; + + dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); + + if (pdata == NULL || pdata->ldo[id] == NULL) + return -ENODEV; + + ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); + if (ldo == NULL) { + dev_err(&pdev->dev, "Unable to allocate private data\n"); + return -ENOMEM; + } + + ldo->wm831x = wm831x; + + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (res == NULL) { + dev_err(&pdev->dev, "No I/O resource\n"); + ret = -EINVAL; + goto err; + } + ldo->base = res->start; + + snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); + ldo->desc.name = ldo->name; + ldo->desc.id = id; + ldo->desc.type = REGULATOR_VOLTAGE; + ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1; + ldo->desc.ops = &wm831x_gp_ldo_ops; + ldo->desc.owner = THIS_MODULE; + + ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, + pdata->ldo[id], ldo); + if (IS_ERR(ldo->regulator)) { + ret = PTR_ERR(ldo->regulator); + dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", + id + 1, ret); + goto err; + } + + irq = platform_get_irq_byname(pdev, "UV"); + ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, + IRQF_TRIGGER_RISING, ldo->name, + ldo); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", + irq, ret); + goto err_regulator; + } + + platform_set_drvdata(pdev, ldo); + + return 0; + +err_regulator: + regulator_unregister(ldo->regulator); +err: + kfree(ldo); + return ret; +} + +static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev) +{ + struct wm831x_ldo *ldo = platform_get_drvdata(pdev); + struct wm831x *wm831x = ldo->wm831x; + + wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); + regulator_unregister(ldo->regulator); + kfree(ldo); + + return 0; +} + +static struct platform_driver wm831x_gp_ldo_driver = { + .probe = wm831x_gp_ldo_probe, + .remove = __devexit_p(wm831x_gp_ldo_remove), + .driver = { + .name = "wm831x-ldo", + }, +}; + +/* + * Analogue LDOs + */ + + +#define WM831X_ALDO_SELECTOR_LOW 0xc +#define WM831X_ALDO_MAX_SELECTOR 0x1f + +static int wm831x_aldo_list_voltage(struct regulator_dev *rdev, + unsigned int selector) +{ + /* 1-1.6V in 50mV steps */ + if (selector <= WM831X_ALDO_SELECTOR_LOW) + return 1000000 + (selector * 50000); + /* 1.7-3.5V in 50mV steps */ + if (selector <= WM831X_ALDO_MAX_SELECTOR) + return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW) + * 100000); + return -EINVAL; +} + +static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg, + int min_uV, int max_uV) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int vsel, ret; + + if (min_uV < 1000000) + vsel = 0; + else if (min_uV < 1700000) + vsel = ((min_uV - 1000000) / 50000); + else + vsel = ((min_uV - 1700000) / 100000) + + WM831X_ALDO_SELECTOR_LOW + 1; + + ret = wm831x_aldo_list_voltage(rdev, vsel); + if (ret < 0) + return ret; + if (ret < min_uV || ret > max_uV) + return -EINVAL; + + return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel); +} + +static int wm831x_aldo_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + int reg = ldo->base + WM831X_LDO_ON_CONTROL; + + return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV); +} + +static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev, + int uV) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL; + + return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV); +} + +static int wm831x_aldo_get_voltage(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int reg = ldo->base + WM831X_LDO_ON_CONTROL; + int ret; + + ret = wm831x_reg_read(wm831x, reg); + if (ret < 0) + return ret; + + ret &= WM831X_LDO7_ON_VSEL_MASK; + + return wm831x_aldo_list_voltage(rdev, ret); +} + +static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; + unsigned int ret; + + ret = wm831x_reg_read(wm831x, on_reg); + if (ret < 0) + return 0; + + if (ret & WM831X_LDO7_ON_MODE) + return REGULATOR_MODE_IDLE; + else + return REGULATOR_MODE_NORMAL; +} + +static int wm831x_aldo_set_mode(struct regulator_dev *rdev, + unsigned int mode) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int ctrl_reg = ldo->base + WM831X_LDO_CONTROL; + int on_reg = ldo->base + WM831X_LDO_ON_CONTROL; + int ret; + + + switch (mode) { + case REGULATOR_MODE_NORMAL: + ret = wm831x_set_bits(wm831x, on_reg, + WM831X_LDO7_ON_MODE, 0); + if (ret < 0) + return ret; + break; + + case REGULATOR_MODE_IDLE: + ret = wm831x_set_bits(wm831x, ctrl_reg, + WM831X_LDO7_ON_MODE, + WM831X_LDO7_ON_MODE); + if (ret < 0) + return ret; + break; + + default: + return -EINVAL; + } + + return 0; +} + +static int wm831x_aldo_get_status(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int mask = 1 << rdev_get_id(rdev); + int ret; + + /* Is the regulator on? */ + ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); + if (ret < 0) + return ret; + if (!(ret & mask)) + return REGULATOR_STATUS_OFF; + + /* Is it reporting under voltage? */ + ret = wm831x_reg_read(wm831x, WM831X_LDO_UV_STATUS); + if (ret & mask) + return REGULATOR_STATUS_ERROR; + + ret = wm831x_aldo_get_mode(rdev); + if (ret < 0) + return ret; + else + return regulator_mode_to_status(ret); +} + +static struct regulator_ops wm831x_aldo_ops = { + .list_voltage = wm831x_aldo_list_voltage, + .get_voltage = wm831x_aldo_get_voltage, + .set_voltage = wm831x_aldo_set_voltage, + .set_suspend_voltage = wm831x_aldo_set_suspend_voltage, + .get_mode = wm831x_aldo_get_mode, + .set_mode = wm831x_aldo_set_mode, + .get_status = wm831x_aldo_get_status, + + .is_enabled = wm831x_ldo_is_enabled, + .enable = wm831x_ldo_enable, + .disable = wm831x_ldo_disable, +}; + +static __devinit int wm831x_aldo_probe(struct platform_device *pdev) +{ + struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); + struct wm831x_pdata *pdata = wm831x->dev->platform_data; + int id = pdev->id % ARRAY_SIZE(pdata->ldo); + struct wm831x_ldo *ldo; + struct resource *res; + int ret, irq; + + dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); + + if (pdata == NULL || pdata->ldo[id] == NULL) + return -ENODEV; + + ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); + if (ldo == NULL) { + dev_err(&pdev->dev, "Unable to allocate private data\n"); + return -ENOMEM; + } + + ldo->wm831x = wm831x; + + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (res == NULL) { + dev_err(&pdev->dev, "No I/O resource\n"); + ret = -EINVAL; + goto err; + } + ldo->base = res->start; + + snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); + ldo->desc.name = ldo->name; + ldo->desc.id = id; + ldo->desc.type = REGULATOR_VOLTAGE; + ldo->desc.n_voltages = WM831X_ALDO_MAX_SELECTOR + 1; + ldo->desc.ops = &wm831x_aldo_ops; + ldo->desc.owner = THIS_MODULE; + + ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, + pdata->ldo[id], ldo); + if (IS_ERR(ldo->regulator)) { + ret = PTR_ERR(ldo->regulator); + dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", + id + 1, ret); + goto err; + } + + irq = platform_get_irq_byname(pdev, "UV"); + ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq, + IRQF_TRIGGER_RISING, ldo->name, + ldo); + if (ret != 0) { + dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n", + irq, ret); + goto err_regulator; + } + + platform_set_drvdata(pdev, ldo); + + return 0; + +err_regulator: + regulator_unregister(ldo->regulator); +err: + kfree(ldo); + return ret; +} + +static __devexit int wm831x_aldo_remove(struct platform_device *pdev) +{ + struct wm831x_ldo *ldo = platform_get_drvdata(pdev); + struct wm831x *wm831x = ldo->wm831x; + + wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo); + regulator_unregister(ldo->regulator); + kfree(ldo); + + return 0; +} + +static struct platform_driver wm831x_aldo_driver = { + .probe = wm831x_aldo_probe, + .remove = __devexit_p(wm831x_aldo_remove), + .driver = { + .name = "wm831x-aldo", + }, +}; + +/* + * Alive LDO + */ + +#define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf + +static int wm831x_alive_ldo_list_voltage(struct regulator_dev *rdev, + unsigned int selector) +{ + /* 0.8-1.55V in 50mV steps */ + if (selector <= WM831X_ALIVE_LDO_MAX_SELECTOR) + return 800000 + (selector * 50000); + return -EINVAL; +} + +static int wm831x_alive_ldo_set_voltage_int(struct regulator_dev *rdev, + int reg, + int min_uV, int max_uV) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int vsel, ret; + + vsel = (min_uV - 800000) / 50000; + + ret = wm831x_alive_ldo_list_voltage(rdev, vsel); + if (ret < 0) + return ret; + if (ret < min_uV || ret > max_uV) + return -EINVAL; + + return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, vsel); +} + +static int wm831x_alive_ldo_set_voltage(struct regulator_dev *rdev, + int min_uV, int max_uV) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; + + return wm831x_alive_ldo_set_voltage_int(rdev, reg, min_uV, max_uV); +} + +static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev, + int uV) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + int reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL; + + return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV); +} + +static int wm831x_alive_ldo_get_voltage(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL; + int ret; + + ret = wm831x_reg_read(wm831x, reg); + if (ret < 0) + return ret; + + ret &= WM831X_LDO11_ON_VSEL_MASK; + + return wm831x_alive_ldo_list_voltage(rdev, ret); +} + +static int wm831x_alive_ldo_get_status(struct regulator_dev *rdev) +{ + struct wm831x_ldo *ldo = rdev_get_drvdata(rdev); + struct wm831x *wm831x = ldo->wm831x; + int mask = 1 << rdev_get_id(rdev); + int ret; + + /* Is the regulator on? */ + ret = wm831x_reg_read(wm831x, WM831X_LDO_STATUS); + if (ret < 0) + return ret; + if (ret & mask) + return REGULATOR_STATUS_ON; + else + return REGULATOR_STATUS_OFF; +} + +static struct regulator_ops wm831x_alive_ldo_ops = { + .list_voltage = wm831x_alive_ldo_list_voltage, + .get_voltage = wm831x_alive_ldo_get_voltage, + .set_voltage = wm831x_alive_ldo_set_voltage, + .set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage, + .get_status = wm831x_alive_ldo_get_status, + + .is_enabled = wm831x_ldo_is_enabled, + .enable = wm831x_ldo_enable, + .disable = wm831x_ldo_disable, +}; + +static __devinit int wm831x_alive_ldo_probe(struct platform_device *pdev) +{ + struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); + struct wm831x_pdata *pdata = wm831x->dev->platform_data; + int id = pdev->id % ARRAY_SIZE(pdata->ldo); + struct wm831x_ldo *ldo; + struct resource *res; + int ret; + + dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1); + + if (pdata == NULL || pdata->ldo[id] == NULL) + return -ENODEV; + + ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL); + if (ldo == NULL) { + dev_err(&pdev->dev, "Unable to allocate private data\n"); + return -ENOMEM; + } + + ldo->wm831x = wm831x; + + res = platform_get_resource(pdev, IORESOURCE_IO, 0); + if (res == NULL) { + dev_err(&pdev->dev, "No I/O resource\n"); + ret = -EINVAL; + goto err; + } + ldo->base = res->start; + + snprintf(ldo->name, sizeof(ldo->name), "LDO%d", id + 1); + ldo->desc.name = ldo->name; + ldo->desc.id = id; + ldo->desc.type = REGULATOR_VOLTAGE; + ldo->desc.n_voltages = WM831X_ALIVE_LDO_MAX_SELECTOR + 1; + ldo->desc.ops = &wm831x_alive_ldo_ops; + ldo->desc.owner = THIS_MODULE; + + ldo->regulator = regulator_register(&ldo->desc, &pdev->dev, + pdata->ldo[id], ldo); + if (IS_ERR(ldo->regulator)) { + ret = PTR_ERR(ldo->regulator); + dev_err(wm831x->dev, "Failed to register LDO%d: %d\n", + id + 1, ret); + goto err; + } + + platform_set_drvdata(pdev, ldo); + + return 0; + +err: + kfree(ldo); + return ret; +} + +static __devexit int wm831x_alive_ldo_remove(struct platform_device *pdev) +{ + struct wm831x_ldo *ldo = platform_get_drvdata(pdev); + + regulator_unregister(ldo->regulator); + kfree(ldo); + + return 0; +} + +static struct platform_driver wm831x_alive_ldo_driver = { + .probe = wm831x_alive_ldo_probe, + .remove = __devexit_p(wm831x_alive_ldo_remove), + .driver = { + .name = "wm831x-alive-ldo", + }, +}; + +static int __init wm831x_ldo_init(void) +{ + int ret; + + ret = platform_driver_register(&wm831x_gp_ldo_driver); + if (ret != 0) + pr_err("Failed to register WM831x GP LDO driver: %d\n", ret); + + ret = platform_driver_register(&wm831x_aldo_driver); + if (ret != 0) + pr_err("Failed to register WM831x ALDO driver: %d\n", ret); + + ret = platform_driver_register(&wm831x_alive_ldo_driver); + if (ret != 0) + pr_err("Failed to register WM831x alive LDO driver: %d\n", + ret); + + return 0; +} +subsys_initcall(wm831x_ldo_init); + +static void __exit wm831x_ldo_exit(void) +{ + platform_driver_unregister(&wm831x_alive_ldo_driver); + platform_driver_unregister(&wm831x_aldo_driver); + platform_driver_unregister(&wm831x_gp_ldo_driver); +} +module_exit(wm831x_ldo_exit); + +/* Module information */ +MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); +MODULE_DESCRIPTION("WM831x LDO driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:wm831x-ldo"); +MODULE_ALIAS("platform:wm831x-aldo"); +MODULE_ALIAS("platform:wm831x-aliveldo"); |