zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/regulator/wm831x-ldo.c b/ap/os/linux/linux-3.4.x/drivers/regulator/wm831x-ldo.c
new file mode 100644
index 0000000..641e9f6
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/regulator/wm831x-ldo.c
@@ -0,0 +1,883 @@
+/*
+ * 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;
+ struct wm831x_ldo *ldo;
+ struct resource *res;
+ int ret, irq;
+
+ if (pdata && pdata->wm831x_num)
+ id = (pdata->wm831x_num * 10) + 1;
+ else
+ id = 0;
+ id = pdev->id - id;
+
+ dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
+
+ if (pdata == NULL || pdata->ldo[id] == NULL)
+ return -ENODEV;
+
+ ldo = devm_kzalloc(&pdev->dev, 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, NULL);
+ 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:
+ 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);
+
+ 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 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, on_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;
+ struct wm831x_ldo *ldo;
+ struct resource *res;
+ int ret, irq;
+
+ if (pdata && pdata->wm831x_num)
+ id = (pdata->wm831x_num * 10) + 1;
+ else
+ id = 0;
+ id = pdev->id - id;
+
+ dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
+
+ if (pdata == NULL || pdata->ldo[id] == NULL)
+ return -ENODEV;
+
+ ldo = devm_kzalloc(&pdev->dev, 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, NULL);
+ 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:
+ 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);
+
+ 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;
+ struct wm831x_ldo *ldo;
+ struct resource *res;
+ int ret;
+
+ if (pdata && pdata->wm831x_num)
+ id = (pdata->wm831x_num * 10) + 1;
+ else
+ id = 0;
+ id = pdev->id - id;
+
+
+ dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
+
+ if (pdata == NULL || pdata->ldo[id] == NULL)
+ return -ENODEV;
+
+ ldo = devm_kzalloc(&pdev->dev, 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, NULL);
+ 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:
+ 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);
+
+ 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");