676 lines
16 KiB
C
676 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
//
|
|
// wm831x-ldo.c -- LDO driver for the WM831x series
|
|
//
|
|
// Copyright 2009 Wolfson Microelectronics PLC.
|
|
//
|
|
// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
|
|
|
|
#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 9
|
|
|
|
#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];
|
|
char supply_name[WM831X_LDO_MAX_NAME];
|
|
struct regulator_desc desc;
|
|
int base;
|
|
struct wm831x *wm831x;
|
|
struct regulator_dev *regulator;
|
|
};
|
|
|
|
/*
|
|
* Shared
|
|
*/
|
|
|
|
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
|
|
*/
|
|
|
|
static const struct linear_range wm831x_gp_ldo_ranges[] = {
|
|
REGULATOR_LINEAR_RANGE(900000, 0, 14, 50000),
|
|
REGULATOR_LINEAR_RANGE(1700000, 15, 31, 100000),
|
|
};
|
|
|
|
static int wm831x_gp_ldo_set_suspend_voltage(struct regulator_dev *rdev,
|
|
int uV)
|
|
{
|
|
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
|
|
struct wm831x *wm831x = ldo->wm831x;
|
|
int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
|
|
|
|
sel = regulator_map_voltage_linear_range(rdev, uV, uV);
|
|
if (sel < 0)
|
|
return sel;
|
|
|
|
return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, sel);
|
|
}
|
|
|
|
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 < 0)
|
|
return ret;
|
|
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 const struct regulator_ops wm831x_gp_ldo_ops = {
|
|
.list_voltage = regulator_list_voltage_linear_range,
|
|
.map_voltage = regulator_map_voltage_linear_range,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
.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,
|
|
.get_bypass = regulator_get_bypass_regmap,
|
|
.set_bypass = regulator_set_bypass_regmap,
|
|
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
};
|
|
|
|
static int wm831x_gp_ldo_probe(struct platform_device *pdev)
|
|
{
|
|
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
|
|
struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
|
|
struct regulator_config config = { };
|
|
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);
|
|
|
|
ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
|
|
if (!ldo)
|
|
return -ENOMEM;
|
|
|
|
ldo->wm831x = wm831x;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_REG, 0);
|
|
if (res == NULL) {
|
|
dev_err(&pdev->dev, "No REG 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;
|
|
|
|
snprintf(ldo->supply_name, sizeof(ldo->supply_name),
|
|
"LDO%dVDD", id + 1);
|
|
ldo->desc.supply_name = ldo->supply_name;
|
|
|
|
ldo->desc.id = id;
|
|
ldo->desc.type = REGULATOR_VOLTAGE;
|
|
ldo->desc.n_voltages = 32;
|
|
ldo->desc.ops = &wm831x_gp_ldo_ops;
|
|
ldo->desc.owner = THIS_MODULE;
|
|
ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
|
|
ldo->desc.vsel_mask = WM831X_LDO1_ON_VSEL_MASK;
|
|
ldo->desc.enable_reg = WM831X_LDO_ENABLE;
|
|
ldo->desc.enable_mask = 1 << id;
|
|
ldo->desc.bypass_reg = ldo->base;
|
|
ldo->desc.bypass_mask = WM831X_LDO1_SWI;
|
|
ldo->desc.linear_ranges = wm831x_gp_ldo_ranges;
|
|
ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_gp_ldo_ranges);
|
|
|
|
config.dev = pdev->dev.parent;
|
|
if (pdata)
|
|
config.init_data = pdata->ldo[id];
|
|
config.driver_data = ldo;
|
|
config.regmap = wm831x->regmap;
|
|
|
|
ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
|
|
&config);
|
|
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 = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
|
|
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
|
|
wm831x_ldo_uv_irq,
|
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
|
|
ldo->name,
|
|
ldo);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
|
|
irq, ret);
|
|
goto err;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, ldo);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver wm831x_gp_ldo_driver = {
|
|
.probe = wm831x_gp_ldo_probe,
|
|
.driver = {
|
|
.name = "wm831x-ldo",
|
|
},
|
|
};
|
|
|
|
/*
|
|
* Analogue LDOs
|
|
*/
|
|
|
|
static const struct linear_range wm831x_aldo_ranges[] = {
|
|
REGULATOR_LINEAR_RANGE(1000000, 0, 12, 50000),
|
|
REGULATOR_LINEAR_RANGE(1700000, 13, 31, 100000),
|
|
};
|
|
|
|
static int wm831x_aldo_set_suspend_voltage(struct regulator_dev *rdev,
|
|
int uV)
|
|
{
|
|
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
|
|
struct wm831x *wm831x = ldo->wm831x;
|
|
int sel, reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
|
|
|
|
sel = regulator_map_voltage_linear_range(rdev, uV, uV);
|
|
if (sel < 0)
|
|
return sel;
|
|
|
|
return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, sel);
|
|
}
|
|
|
|
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 < 0)
|
|
return ret;
|
|
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 const struct regulator_ops wm831x_aldo_ops = {
|
|
.list_voltage = regulator_list_voltage_linear_range,
|
|
.map_voltage = regulator_map_voltage_linear_range,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
.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,
|
|
.set_bypass = regulator_set_bypass_regmap,
|
|
.get_bypass = regulator_get_bypass_regmap,
|
|
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
};
|
|
|
|
static int wm831x_aldo_probe(struct platform_device *pdev)
|
|
{
|
|
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
|
|
struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
|
|
struct regulator_config config = { };
|
|
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);
|
|
|
|
ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
|
|
if (!ldo)
|
|
return -ENOMEM;
|
|
|
|
ldo->wm831x = wm831x;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_REG, 0);
|
|
if (res == NULL) {
|
|
dev_err(&pdev->dev, "No REG 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;
|
|
|
|
snprintf(ldo->supply_name, sizeof(ldo->supply_name),
|
|
"LDO%dVDD", id + 1);
|
|
ldo->desc.supply_name = ldo->supply_name;
|
|
|
|
ldo->desc.id = id;
|
|
ldo->desc.type = REGULATOR_VOLTAGE;
|
|
ldo->desc.n_voltages = 32;
|
|
ldo->desc.linear_ranges = wm831x_aldo_ranges;
|
|
ldo->desc.n_linear_ranges = ARRAY_SIZE(wm831x_aldo_ranges);
|
|
ldo->desc.ops = &wm831x_aldo_ops;
|
|
ldo->desc.owner = THIS_MODULE;
|
|
ldo->desc.vsel_reg = ldo->base + WM831X_LDO_ON_CONTROL;
|
|
ldo->desc.vsel_mask = WM831X_LDO7_ON_VSEL_MASK;
|
|
ldo->desc.enable_reg = WM831X_LDO_ENABLE;
|
|
ldo->desc.enable_mask = 1 << id;
|
|
ldo->desc.bypass_reg = ldo->base;
|
|
ldo->desc.bypass_mask = WM831X_LDO7_SWI;
|
|
|
|
config.dev = pdev->dev.parent;
|
|
if (pdata)
|
|
config.init_data = pdata->ldo[id];
|
|
config.driver_data = ldo;
|
|
config.regmap = wm831x->regmap;
|
|
|
|
ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
|
|
&config);
|
|
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 = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "UV"));
|
|
ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
|
|
wm831x_ldo_uv_irq,
|
|
IRQF_TRIGGER_RISING | IRQF_ONESHOT,
|
|
ldo->name, ldo);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
|
|
irq, ret);
|
|
goto err;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, ldo);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static struct platform_driver wm831x_aldo_driver = {
|
|
.probe = wm831x_aldo_probe,
|
|
.driver = {
|
|
.name = "wm831x-aldo",
|
|
},
|
|
};
|
|
|
|
/*
|
|
* Alive LDO
|
|
*/
|
|
|
|
#define WM831X_ALIVE_LDO_MAX_SELECTOR 0xf
|
|
|
|
static int wm831x_alive_ldo_set_suspend_voltage(struct regulator_dev *rdev,
|
|
int uV)
|
|
{
|
|
struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
|
|
struct wm831x *wm831x = ldo->wm831x;
|
|
int sel, reg = ldo->base + WM831X_ALIVE_LDO_SLEEP_CONTROL;
|
|
|
|
sel = regulator_map_voltage_linear(rdev, uV, uV);
|
|
if (sel < 0)
|
|
return sel;
|
|
|
|
return wm831x_set_bits(wm831x, reg, WM831X_LDO11_ON_VSEL_MASK, sel);
|
|
}
|
|
|
|
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 const struct regulator_ops wm831x_alive_ldo_ops = {
|
|
.list_voltage = regulator_list_voltage_linear,
|
|
.map_voltage = regulator_map_voltage_linear,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
.set_suspend_voltage = wm831x_alive_ldo_set_suspend_voltage,
|
|
.get_status = wm831x_alive_ldo_get_status,
|
|
|
|
.is_enabled = regulator_is_enabled_regmap,
|
|
.enable = regulator_enable_regmap,
|
|
.disable = regulator_disable_regmap,
|
|
};
|
|
|
|
static int wm831x_alive_ldo_probe(struct platform_device *pdev)
|
|
{
|
|
struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
|
|
struct wm831x_pdata *pdata = dev_get_platdata(wm831x->dev);
|
|
struct regulator_config config = { };
|
|
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);
|
|
|
|
ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ldo), GFP_KERNEL);
|
|
if (!ldo)
|
|
return -ENOMEM;
|
|
|
|
ldo->wm831x = wm831x;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_REG, 0);
|
|
if (res == NULL) {
|
|
dev_err(&pdev->dev, "No REG 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;
|
|
|
|
snprintf(ldo->supply_name, sizeof(ldo->supply_name),
|
|
"LDO%dVDD", id + 1);
|
|
ldo->desc.supply_name = ldo->supply_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->desc.vsel_reg = ldo->base + WM831X_ALIVE_LDO_ON_CONTROL;
|
|
ldo->desc.vsel_mask = WM831X_LDO11_ON_VSEL_MASK;
|
|
ldo->desc.enable_reg = WM831X_LDO_ENABLE;
|
|
ldo->desc.enable_mask = 1 << id;
|
|
ldo->desc.min_uV = 800000;
|
|
ldo->desc.uV_step = 50000;
|
|
ldo->desc.enable_time = 1000;
|
|
|
|
config.dev = pdev->dev.parent;
|
|
if (pdata)
|
|
config.init_data = pdata->ldo[id];
|
|
config.driver_data = ldo;
|
|
config.regmap = wm831x->regmap;
|
|
|
|
ldo->regulator = devm_regulator_register(&pdev->dev, &ldo->desc,
|
|
&config);
|
|
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 struct platform_driver wm831x_alive_ldo_driver = {
|
|
.probe = wm831x_alive_ldo_probe,
|
|
.driver = {
|
|
.name = "wm831x-alive-ldo",
|
|
},
|
|
};
|
|
|
|
static struct platform_driver * const drivers[] = {
|
|
&wm831x_gp_ldo_driver,
|
|
&wm831x_aldo_driver,
|
|
&wm831x_alive_ldo_driver,
|
|
};
|
|
|
|
static int __init wm831x_ldo_init(void)
|
|
{
|
|
return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
|
|
}
|
|
subsys_initcall(wm831x_ldo_init);
|
|
|
|
static void __exit wm831x_ldo_exit(void)
|
|
{
|
|
platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
|
|
}
|
|
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");
|