/drivers/regulator/wm831x-ldo.c
https://bitbucket.org/slukk/jb-tsm-kernel-4.2 · C · 873 lines · 676 code · 162 blank · 35 comment · 89 complexity · 93bee46efdad3d8b09379539a2c63516 MD5 · raw file
- /*
- * 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/slab.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,
- unsigned *selector)
- {
- 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;
- *selector = vsel;
- 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,
- unsigned *selector)
- {
- 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,
- selector);
- }
- 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;
- unsigned int selector;
- return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
- }
- static int wm831x_gp_ldo_get_voltage_sel(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 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;
- int ret;
- ret = wm831x_reg_read(wm831x, on_reg);
- if (ret < 0)
- return ret;
- if (!(ret & WM831X_LDO1_ON_MODE))
- return REGULATOR_MODE_NORMAL;
- ret = wm831x_reg_read(wm831x, ctrl_reg);
- if (ret < 0)
- return ret;
- 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, 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;
- case REGULATOR_MODE_STANDBY:
- 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;
- 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_sel = wm831x_gp_ldo_get_voltage_sel,
- .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 = request_threaded_irq(irq, NULL, 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);
- platform_set_drvdata(pdev, NULL);
- free_irq(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",
- .owner = THIS_MODULE,
- },
- };
- /*
- * 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,
- unsigned *selector)
- {
- 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;
- *selector = vsel;
- 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, unsigned *selector)
- {
- 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,
- selector);
- }
- 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;
- unsigned int selector;
- return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV, &selector);
- }
- static int wm831x_aldo_get_voltage_sel(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 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;
- 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_sel = wm831x_aldo_get_voltage_sel,
- .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 = request_threaded_irq(irq, NULL, 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);
- free_irq(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",
- .owner = THIS_MODULE,
- },
- };
- /*
- * 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,
- unsigned *selector)
- {
- 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;
- *selector = vsel;
- 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,
- unsigned *selector)
- {
- 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,
- selector);
- }
- 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;
- unsigned selector;
- return wm831x_alive_ldo_set_voltage_int(rdev, reg, uV, uV, &selector);
- }
- static int wm831x_alive_ldo_get_voltage_sel(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 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_sel = wm831x_alive_ldo_get_voltage_sel,
- .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",
- .owner = THIS_MODULE,
- },
- };
- 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");