853 lines
20 KiB
C
853 lines
20 KiB
C
/*
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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 <broonie@opensource.wolfsonmicro.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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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/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 6
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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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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 int wm831x_ldo_is_enabled(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 reg;
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reg = wm831x_reg_read(wm831x, WM831X_LDO_ENABLE);
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if (reg < 0)
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return reg;
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if (reg & mask)
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return 1;
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else
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return 0;
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}
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static int wm831x_ldo_enable(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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return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, mask);
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}
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static int wm831x_ldo_disable(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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return wm831x_set_bits(wm831x, WM831X_LDO_ENABLE, mask, 0);
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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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#define WM831X_GP_LDO_SELECTOR_LOW 0xe
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#define WM831X_GP_LDO_MAX_SELECTOR 0x1f
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static int wm831x_gp_ldo_list_voltage(struct regulator_dev *rdev,
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unsigned int selector)
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{
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/* 0.9-1.6V in 50mV steps */
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if (selector <= WM831X_GP_LDO_SELECTOR_LOW)
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return 900000 + (selector * 50000);
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/* 1.7-3.3V in 50mV steps */
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if (selector <= WM831X_GP_LDO_MAX_SELECTOR)
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return 1600000 + ((selector - WM831X_GP_LDO_SELECTOR_LOW)
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* 100000);
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return -EINVAL;
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}
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static int wm831x_gp_ldo_set_voltage_int(struct regulator_dev *rdev, int reg,
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int min_uV, int max_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 vsel, ret;
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if (min_uV < 900000)
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vsel = 0;
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else if (min_uV < 1700000)
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vsel = ((min_uV - 900000) / 50000);
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else
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vsel = ((min_uV - 1700000) / 100000)
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+ WM831X_GP_LDO_SELECTOR_LOW + 1;
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ret = wm831x_gp_ldo_list_voltage(rdev, vsel);
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if (ret < 0)
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return ret;
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if (ret < min_uV || ret > max_uV)
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return -EINVAL;
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return wm831x_set_bits(wm831x, reg, WM831X_LDO1_ON_VSEL_MASK, vsel);
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}
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static int wm831x_gp_ldo_set_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
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int reg = ldo->base + WM831X_LDO_ON_CONTROL;
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return wm831x_gp_ldo_set_voltage_int(rdev, reg, min_uV, max_uV);
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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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int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
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return wm831x_gp_ldo_set_voltage_int(rdev, reg, uV, uV);
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}
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static int wm831x_gp_ldo_get_voltage(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 reg = ldo->base + WM831X_LDO_ON_CONTROL;
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int ret;
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ret = wm831x_reg_read(wm831x, reg);
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if (ret < 0)
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return ret;
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ret &= WM831X_LDO1_ON_VSEL_MASK;
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return wm831x_gp_ldo_list_voltage(rdev, ret);
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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,
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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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case REGULATOR_MODE_STANDBY:
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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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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 & 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 struct regulator_ops wm831x_gp_ldo_ops = {
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.list_voltage = wm831x_gp_ldo_list_voltage,
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.get_voltage = wm831x_gp_ldo_get_voltage,
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.set_voltage = wm831x_gp_ldo_set_voltage,
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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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.is_enabled = wm831x_ldo_is_enabled,
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.enable = wm831x_ldo_enable,
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.disable = wm831x_ldo_disable,
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};
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static __devinit 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 = wm831x->dev->platform_data;
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int id = pdev->id % ARRAY_SIZE(pdata->ldo);
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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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dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
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if (pdata == NULL || pdata->ldo[id] == NULL)
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return -ENODEV;
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ldo = kzalloc(sizeof(struct wm831x_ldo), GFP_KERNEL);
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if (ldo == NULL) {
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dev_err(&pdev->dev, "Unable to allocate private data\n");
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return -ENOMEM;
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}
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ldo->wm831x = wm831x;
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (res == NULL) {
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dev_err(&pdev->dev, "No I/O 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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ldo->desc.id = id;
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ldo->desc.type = REGULATOR_VOLTAGE;
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ldo->desc.n_voltages = WM831X_GP_LDO_MAX_SELECTOR + 1;
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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->regulator = regulator_register(&ldo->desc, &pdev->dev,
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pdata->ldo[id], ldo);
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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 = platform_get_irq_byname(pdev, "UV");
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ret = wm831x_request_irq(wm831x, irq, wm831x_ldo_uv_irq,
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IRQF_TRIGGER_RISING, 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_regulator;
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}
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platform_set_drvdata(pdev, ldo);
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return 0;
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err_regulator:
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regulator_unregister(ldo->regulator);
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err:
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kfree(ldo);
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return ret;
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}
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static __devexit int wm831x_gp_ldo_remove(struct platform_device *pdev)
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{
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struct wm831x_ldo *ldo = platform_get_drvdata(pdev);
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struct wm831x *wm831x = ldo->wm831x;
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wm831x_free_irq(wm831x, platform_get_irq_byname(pdev, "UV"), ldo);
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regulator_unregister(ldo->regulator);
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kfree(ldo);
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return 0;
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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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.remove = __devexit_p(wm831x_gp_ldo_remove),
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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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#define WM831X_ALDO_SELECTOR_LOW 0xc
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#define WM831X_ALDO_MAX_SELECTOR 0x1f
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static int wm831x_aldo_list_voltage(struct regulator_dev *rdev,
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unsigned int selector)
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{
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/* 1-1.6V in 50mV steps */
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if (selector <= WM831X_ALDO_SELECTOR_LOW)
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return 1000000 + (selector * 50000);
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/* 1.7-3.5V in 50mV steps */
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if (selector <= WM831X_ALDO_MAX_SELECTOR)
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return 1600000 + ((selector - WM831X_ALDO_SELECTOR_LOW)
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* 100000);
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return -EINVAL;
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}
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static int wm831x_aldo_set_voltage_int(struct regulator_dev *rdev, int reg,
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int min_uV, int max_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 vsel, ret;
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if (min_uV < 1000000)
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vsel = 0;
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else if (min_uV < 1700000)
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vsel = ((min_uV - 1000000) / 50000);
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else
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vsel = ((min_uV - 1700000) / 100000)
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+ WM831X_ALDO_SELECTOR_LOW + 1;
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ret = wm831x_aldo_list_voltage(rdev, vsel);
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if (ret < 0)
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return ret;
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if (ret < min_uV || ret > max_uV)
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return -EINVAL;
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return wm831x_set_bits(wm831x, reg, WM831X_LDO7_ON_VSEL_MASK, vsel);
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}
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static int wm831x_aldo_set_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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struct wm831x_ldo *ldo = rdev_get_drvdata(rdev);
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int reg = ldo->base + WM831X_LDO_ON_CONTROL;
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return wm831x_aldo_set_voltage_int(rdev, reg, min_uV, max_uV);
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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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int reg = ldo->base + WM831X_LDO_SLEEP_CONTROL;
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return wm831x_aldo_set_voltage_int(rdev, reg, uV, uV);
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}
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static int wm831x_aldo_get_voltage(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 reg = ldo->base + WM831X_LDO_ON_CONTROL;
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int ret;
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ret = wm831x_reg_read(wm831x, reg);
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if (ret < 0)
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return ret;
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ret &= WM831X_LDO7_ON_VSEL_MASK;
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return wm831x_aldo_list_voltage(rdev, ret);
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}
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static unsigned int wm831x_aldo_get_mode(struct regulator_dev *rdev)
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{
|
|
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 = 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");
|