mirror of https://gitee.com/openkylin/linux.git
1051 lines
26 KiB
C
1051 lines
26 KiB
C
/*
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* wm831x-dcdc.c -- DC-DC buck convertor 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/regulator/machine.h>
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#include <linux/gpio.h>
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#include <linux/slab.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_BUCKV_MAX_SELECTOR 0x68
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#define WM831X_BUCKP_MAX_SELECTOR 0x66
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#define WM831X_DCDC_MODE_FAST 0
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#define WM831X_DCDC_MODE_NORMAL 1
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#define WM831X_DCDC_MODE_IDLE 2
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#define WM831X_DCDC_MODE_STANDBY 3
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#define WM831X_DCDC_MAX_NAME 6
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/* Register offsets in control block */
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#define WM831X_DCDC_CONTROL_1 0
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#define WM831X_DCDC_CONTROL_2 1
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#define WM831X_DCDC_ON_CONFIG 2
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#define WM831X_DCDC_SLEEP_CONTROL 3
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#define WM831X_DCDC_DVS_CONTROL 4
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/*
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* Shared
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*/
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struct wm831x_dcdc {
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char name[WM831X_DCDC_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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int dvs_gpio;
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int dvs_gpio_state;
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int on_vsel;
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int dvs_vsel;
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};
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static int wm831x_dcdc_is_enabled(struct regulator_dev *rdev)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->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_DCDC_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_dcdc_enable(struct regulator_dev *rdev)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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int mask = 1 << rdev_get_id(rdev);
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return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, mask);
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}
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static int wm831x_dcdc_disable(struct regulator_dev *rdev)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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int mask = 1 << rdev_get_id(rdev);
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return wm831x_set_bits(wm831x, WM831X_DCDC_ENABLE, mask, 0);
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}
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static unsigned int wm831x_dcdc_get_mode(struct regulator_dev *rdev)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
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int val;
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val = wm831x_reg_read(wm831x, reg);
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if (val < 0)
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return val;
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val = (val & WM831X_DC1_ON_MODE_MASK) >> WM831X_DC1_ON_MODE_SHIFT;
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switch (val) {
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case WM831X_DCDC_MODE_FAST:
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return REGULATOR_MODE_FAST;
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case WM831X_DCDC_MODE_NORMAL:
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return REGULATOR_MODE_NORMAL;
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case WM831X_DCDC_MODE_STANDBY:
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return REGULATOR_MODE_STANDBY;
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case WM831X_DCDC_MODE_IDLE:
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return REGULATOR_MODE_IDLE;
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default:
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BUG();
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return -EINVAL;
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}
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}
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static int wm831x_dcdc_set_mode_int(struct wm831x *wm831x, int reg,
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unsigned int mode)
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{
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int val;
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switch (mode) {
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case REGULATOR_MODE_FAST:
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val = WM831X_DCDC_MODE_FAST;
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break;
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case REGULATOR_MODE_NORMAL:
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val = WM831X_DCDC_MODE_NORMAL;
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break;
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case REGULATOR_MODE_STANDBY:
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val = WM831X_DCDC_MODE_STANDBY;
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break;
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case REGULATOR_MODE_IDLE:
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val = WM831X_DCDC_MODE_IDLE;
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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 wm831x_set_bits(wm831x, reg, WM831X_DC1_ON_MODE_MASK,
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val << WM831X_DC1_ON_MODE_SHIFT);
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}
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static int wm831x_dcdc_set_mode(struct regulator_dev *rdev, unsigned int mode)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
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return wm831x_dcdc_set_mode_int(wm831x, reg, mode);
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}
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static int wm831x_dcdc_set_suspend_mode(struct regulator_dev *rdev,
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unsigned int mode)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
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return wm831x_dcdc_set_mode_int(wm831x, reg, mode);
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}
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static int wm831x_dcdc_get_status(struct regulator_dev *rdev)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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int ret;
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/* First, check for errors */
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ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
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if (ret < 0)
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return ret;
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if (ret & (1 << rdev_get_id(rdev))) {
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dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
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rdev_get_id(rdev) + 1);
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return REGULATOR_STATUS_ERROR;
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}
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/* DCDC1 and DCDC2 can additionally detect high voltage/current */
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if (rdev_get_id(rdev) < 2) {
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if (ret & (WM831X_DC1_OV_STS << rdev_get_id(rdev))) {
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dev_dbg(wm831x->dev, "DCDC%d over voltage\n",
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rdev_get_id(rdev) + 1);
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return REGULATOR_STATUS_ERROR;
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}
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if (ret & (WM831X_DC1_HC_STS << rdev_get_id(rdev))) {
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dev_dbg(wm831x->dev, "DCDC%d over current\n",
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rdev_get_id(rdev) + 1);
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return REGULATOR_STATUS_ERROR;
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}
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}
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/* Is the regulator on? */
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ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
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if (ret < 0)
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return ret;
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if (!(ret & (1 << rdev_get_id(rdev))))
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return REGULATOR_STATUS_OFF;
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/* TODO: When we handle hardware control modes so we can report the
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* current mode. */
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return REGULATOR_STATUS_ON;
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}
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static irqreturn_t wm831x_dcdc_uv_irq(int irq, void *data)
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{
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struct wm831x_dcdc *dcdc = data;
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regulator_notifier_call_chain(dcdc->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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static irqreturn_t wm831x_dcdc_oc_irq(int irq, void *data)
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{
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struct wm831x_dcdc *dcdc = data;
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regulator_notifier_call_chain(dcdc->regulator,
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REGULATOR_EVENT_OVER_CURRENT,
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NULL);
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return IRQ_HANDLED;
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}
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/*
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* BUCKV specifics
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*/
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static int wm831x_buckv_list_voltage(struct regulator_dev *rdev,
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unsigned selector)
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{
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if (selector <= 0x8)
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return 600000;
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if (selector <= WM831X_BUCKV_MAX_SELECTOR)
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return 600000 + ((selector - 0x8) * 12500);
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return -EINVAL;
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}
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static int wm831x_buckv_select_min_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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u16 vsel;
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if (min_uV < 600000)
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vsel = 0;
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else if (min_uV <= 1800000)
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vsel = ((min_uV - 600000) / 12500) + 8;
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else
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return -EINVAL;
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if (wm831x_buckv_list_voltage(rdev, vsel) > max_uV)
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return -EINVAL;
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return vsel;
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}
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static int wm831x_buckv_select_max_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV)
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{
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u16 vsel;
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if (max_uV < 600000 || max_uV > 1800000)
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return -EINVAL;
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vsel = ((max_uV - 600000) / 12500) + 8;
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if (wm831x_buckv_list_voltage(rdev, vsel) < min_uV ||
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wm831x_buckv_list_voltage(rdev, vsel) < max_uV)
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return -EINVAL;
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return vsel;
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}
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static int wm831x_buckv_set_dvs(struct regulator_dev *rdev, int state)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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if (state == dcdc->dvs_gpio_state)
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return 0;
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dcdc->dvs_gpio_state = state;
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gpio_set_value(dcdc->dvs_gpio, state);
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/* Should wait for DVS state change to be asserted if we have
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* a GPIO for it, for now assume the device is configured
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* for the fastest possible transition.
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*/
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return 0;
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}
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static int wm831x_buckv_set_voltage(struct regulator_dev *rdev,
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int min_uV, int max_uV, unsigned *selector)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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int on_reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
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int dvs_reg = dcdc->base + WM831X_DCDC_DVS_CONTROL;
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int vsel, ret;
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vsel = wm831x_buckv_select_min_voltage(rdev, min_uV, max_uV);
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if (vsel < 0)
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return vsel;
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*selector = vsel;
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/* If this value is already set then do a GPIO update if we can */
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if (dcdc->dvs_gpio && dcdc->on_vsel == vsel)
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return wm831x_buckv_set_dvs(rdev, 0);
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if (dcdc->dvs_gpio && dcdc->dvs_vsel == vsel)
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return wm831x_buckv_set_dvs(rdev, 1);
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/* Always set the ON status to the minimum voltage */
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ret = wm831x_set_bits(wm831x, on_reg, WM831X_DC1_ON_VSEL_MASK, vsel);
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if (ret < 0)
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return ret;
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dcdc->on_vsel = vsel;
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if (!dcdc->dvs_gpio)
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return ret;
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/* Kick the voltage transition now */
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ret = wm831x_buckv_set_dvs(rdev, 0);
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if (ret < 0)
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return ret;
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/* Set the high voltage as the DVS voltage. This is optimised
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* for CPUfreq usage, most processors will keep the maximum
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* voltage constant and lower the minimum with the frequency. */
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vsel = wm831x_buckv_select_max_voltage(rdev, min_uV, max_uV);
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if (vsel < 0) {
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/* This should never happen - at worst the same vsel
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* should be chosen */
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WARN_ON(vsel < 0);
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return 0;
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}
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/* Don't bother if it's the same VSEL we're already using */
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if (vsel == dcdc->on_vsel)
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return 0;
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ret = wm831x_set_bits(wm831x, dvs_reg, WM831X_DC1_DVS_VSEL_MASK, vsel);
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if (ret == 0)
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dcdc->dvs_vsel = vsel;
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else
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dev_warn(wm831x->dev, "Failed to set DCDC DVS VSEL: %d\n",
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ret);
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return 0;
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}
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static int wm831x_buckv_set_suspend_voltage(struct regulator_dev *rdev,
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int uV)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
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int vsel;
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vsel = wm831x_buckv_select_min_voltage(rdev, uV, uV);
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if (vsel < 0)
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return vsel;
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return wm831x_set_bits(wm831x, reg, WM831X_DC1_SLP_VSEL_MASK, vsel);
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}
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static int wm831x_buckv_get_voltage_sel(struct regulator_dev *rdev)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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if (dcdc->dvs_gpio && dcdc->dvs_gpio_state)
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return dcdc->dvs_vsel;
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else
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return dcdc->on_vsel;
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}
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/* Current limit options */
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static u16 wm831x_dcdc_ilim[] = {
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125, 250, 375, 500, 625, 750, 875, 1000
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};
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static int wm831x_buckv_set_current_limit(struct regulator_dev *rdev,
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int min_uA, int max_uA)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2;
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int i;
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for (i = 0; i < ARRAY_SIZE(wm831x_dcdc_ilim); i++) {
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if (max_uA <= wm831x_dcdc_ilim[i])
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break;
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}
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if (i == ARRAY_SIZE(wm831x_dcdc_ilim))
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return -EINVAL;
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return wm831x_set_bits(wm831x, reg, WM831X_DC1_HC_THR_MASK, i);
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}
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static int wm831x_buckv_get_current_limit(struct regulator_dev *rdev)
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{
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struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
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struct wm831x *wm831x = dcdc->wm831x;
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u16 reg = dcdc->base + WM831X_DCDC_CONTROL_2;
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int val;
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val = wm831x_reg_read(wm831x, reg);
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if (val < 0)
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return val;
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return wm831x_dcdc_ilim[val & WM831X_DC1_HC_THR_MASK];
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}
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static struct regulator_ops wm831x_buckv_ops = {
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.set_voltage = wm831x_buckv_set_voltage,
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.get_voltage_sel = wm831x_buckv_get_voltage_sel,
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.list_voltage = wm831x_buckv_list_voltage,
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.set_suspend_voltage = wm831x_buckv_set_suspend_voltage,
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.set_current_limit = wm831x_buckv_set_current_limit,
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.get_current_limit = wm831x_buckv_get_current_limit,
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.is_enabled = wm831x_dcdc_is_enabled,
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.enable = wm831x_dcdc_enable,
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.disable = wm831x_dcdc_disable,
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.get_status = wm831x_dcdc_get_status,
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.get_mode = wm831x_dcdc_get_mode,
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.set_mode = wm831x_dcdc_set_mode,
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.set_suspend_mode = wm831x_dcdc_set_suspend_mode,
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};
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/*
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* Set up DVS control. We just log errors since we can still run
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* (with reduced performance) if we fail.
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*/
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static __devinit void wm831x_buckv_dvs_init(struct wm831x_dcdc *dcdc,
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struct wm831x_buckv_pdata *pdata)
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{
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struct wm831x *wm831x = dcdc->wm831x;
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int ret;
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u16 ctrl;
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if (!pdata || !pdata->dvs_gpio)
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return;
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switch (pdata->dvs_control_src) {
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case 1:
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ctrl = 2 << WM831X_DC1_DVS_SRC_SHIFT;
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break;
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case 2:
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ctrl = 3 << WM831X_DC1_DVS_SRC_SHIFT;
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break;
|
|
default:
|
|
dev_err(wm831x->dev, "Invalid DVS control source %d for %s\n",
|
|
pdata->dvs_control_src, dcdc->name);
|
|
return;
|
|
}
|
|
|
|
ret = wm831x_set_bits(wm831x, dcdc->base + WM831X_DCDC_DVS_CONTROL,
|
|
WM831X_DC1_DVS_SRC_MASK, ctrl);
|
|
if (ret < 0) {
|
|
dev_err(wm831x->dev, "Failed to set %s DVS source: %d\n",
|
|
dcdc->name, ret);
|
|
return;
|
|
}
|
|
|
|
ret = gpio_request(pdata->dvs_gpio, "DCDC DVS");
|
|
if (ret < 0) {
|
|
dev_err(wm831x->dev, "Failed to get %s DVS GPIO: %d\n",
|
|
dcdc->name, ret);
|
|
return;
|
|
}
|
|
|
|
/* gpiolib won't let us read the GPIO status so pick the higher
|
|
* of the two existing voltages so we take it as platform data.
|
|
*/
|
|
dcdc->dvs_gpio_state = pdata->dvs_init_state;
|
|
|
|
ret = gpio_direction_output(pdata->dvs_gpio, dcdc->dvs_gpio_state);
|
|
if (ret < 0) {
|
|
dev_err(wm831x->dev, "Failed to enable %s DVS GPIO: %d\n",
|
|
dcdc->name, ret);
|
|
gpio_free(pdata->dvs_gpio);
|
|
return;
|
|
}
|
|
|
|
dcdc->dvs_gpio = pdata->dvs_gpio;
|
|
}
|
|
|
|
static __devinit int wm831x_buckv_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->dcdc);
|
|
struct wm831x_dcdc *dcdc;
|
|
struct resource *res;
|
|
int ret, irq;
|
|
|
|
dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
|
|
|
|
if (pdata == NULL || pdata->dcdc[id] == NULL)
|
|
return -ENODEV;
|
|
|
|
dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL);
|
|
if (dcdc == NULL) {
|
|
dev_err(&pdev->dev, "Unable to allocate private data\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dcdc->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;
|
|
}
|
|
dcdc->base = res->start;
|
|
|
|
snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
|
|
dcdc->desc.name = dcdc->name;
|
|
dcdc->desc.id = id;
|
|
dcdc->desc.type = REGULATOR_VOLTAGE;
|
|
dcdc->desc.n_voltages = WM831X_BUCKV_MAX_SELECTOR + 1;
|
|
dcdc->desc.ops = &wm831x_buckv_ops;
|
|
dcdc->desc.owner = THIS_MODULE;
|
|
|
|
ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG);
|
|
if (ret < 0) {
|
|
dev_err(wm831x->dev, "Failed to read ON VSEL: %d\n", ret);
|
|
goto err;
|
|
}
|
|
dcdc->on_vsel = ret & WM831X_DC1_ON_VSEL_MASK;
|
|
|
|
ret = wm831x_reg_read(wm831x, dcdc->base + WM831X_DCDC_ON_CONFIG);
|
|
if (ret < 0) {
|
|
dev_err(wm831x->dev, "Failed to read DVS VSEL: %d\n", ret);
|
|
goto err;
|
|
}
|
|
dcdc->dvs_vsel = ret & WM831X_DC1_DVS_VSEL_MASK;
|
|
|
|
if (pdata->dcdc[id])
|
|
wm831x_buckv_dvs_init(dcdc, pdata->dcdc[id]->driver_data);
|
|
|
|
dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
|
|
pdata->dcdc[id], dcdc);
|
|
if (IS_ERR(dcdc->regulator)) {
|
|
ret = PTR_ERR(dcdc->regulator);
|
|
dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
|
|
id + 1, ret);
|
|
goto err;
|
|
}
|
|
|
|
irq = platform_get_irq_byname(pdev, "UV");
|
|
ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
|
|
IRQF_TRIGGER_RISING, dcdc->name, dcdc);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
|
|
irq, ret);
|
|
goto err_regulator;
|
|
}
|
|
|
|
irq = platform_get_irq_byname(pdev, "HC");
|
|
ret = request_threaded_irq(irq, NULL, wm831x_dcdc_oc_irq,
|
|
IRQF_TRIGGER_RISING, dcdc->name, dcdc);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "Failed to request HC IRQ %d: %d\n",
|
|
irq, ret);
|
|
goto err_uv;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, dcdc);
|
|
|
|
return 0;
|
|
|
|
err_uv:
|
|
free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
|
|
err_regulator:
|
|
regulator_unregister(dcdc->regulator);
|
|
err:
|
|
if (dcdc->dvs_gpio)
|
|
gpio_free(dcdc->dvs_gpio);
|
|
kfree(dcdc);
|
|
return ret;
|
|
}
|
|
|
|
static __devexit int wm831x_buckv_remove(struct platform_device *pdev)
|
|
{
|
|
struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
|
|
struct wm831x *wm831x = dcdc->wm831x;
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
free_irq(platform_get_irq_byname(pdev, "HC"), dcdc);
|
|
free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
|
|
regulator_unregister(dcdc->regulator);
|
|
if (dcdc->dvs_gpio)
|
|
gpio_free(dcdc->dvs_gpio);
|
|
kfree(dcdc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver wm831x_buckv_driver = {
|
|
.probe = wm831x_buckv_probe,
|
|
.remove = __devexit_p(wm831x_buckv_remove),
|
|
.driver = {
|
|
.name = "wm831x-buckv",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* BUCKP specifics
|
|
*/
|
|
|
|
static int wm831x_buckp_list_voltage(struct regulator_dev *rdev,
|
|
unsigned selector)
|
|
{
|
|
if (selector <= WM831X_BUCKP_MAX_SELECTOR)
|
|
return 850000 + (selector * 25000);
|
|
else
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int wm831x_buckp_set_voltage_int(struct regulator_dev *rdev, int reg,
|
|
int min_uV, int max_uV, int *selector)
|
|
{
|
|
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
|
|
struct wm831x *wm831x = dcdc->wm831x;
|
|
u16 vsel;
|
|
|
|
if (min_uV <= 34000000)
|
|
vsel = (min_uV - 850000) / 25000;
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (wm831x_buckp_list_voltage(rdev, vsel) > max_uV)
|
|
return -EINVAL;
|
|
|
|
*selector = vsel;
|
|
|
|
return wm831x_set_bits(wm831x, reg, WM831X_DC3_ON_VSEL_MASK, vsel);
|
|
}
|
|
|
|
static int wm831x_buckp_set_voltage(struct regulator_dev *rdev,
|
|
int min_uV, int max_uV,
|
|
unsigned *selector)
|
|
{
|
|
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
|
|
u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
|
|
|
|
return wm831x_buckp_set_voltage_int(rdev, reg, min_uV, max_uV,
|
|
selector);
|
|
}
|
|
|
|
static int wm831x_buckp_set_suspend_voltage(struct regulator_dev *rdev,
|
|
int uV)
|
|
{
|
|
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
|
|
u16 reg = dcdc->base + WM831X_DCDC_SLEEP_CONTROL;
|
|
unsigned selector;
|
|
|
|
return wm831x_buckp_set_voltage_int(rdev, reg, uV, uV, &selector);
|
|
}
|
|
|
|
static int wm831x_buckp_get_voltage_sel(struct regulator_dev *rdev)
|
|
{
|
|
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
|
|
struct wm831x *wm831x = dcdc->wm831x;
|
|
u16 reg = dcdc->base + WM831X_DCDC_ON_CONFIG;
|
|
int val;
|
|
|
|
val = wm831x_reg_read(wm831x, reg);
|
|
if (val < 0)
|
|
return val;
|
|
|
|
return val & WM831X_DC3_ON_VSEL_MASK;
|
|
}
|
|
|
|
static struct regulator_ops wm831x_buckp_ops = {
|
|
.set_voltage = wm831x_buckp_set_voltage,
|
|
.get_voltage_sel = wm831x_buckp_get_voltage_sel,
|
|
.list_voltage = wm831x_buckp_list_voltage,
|
|
.set_suspend_voltage = wm831x_buckp_set_suspend_voltage,
|
|
|
|
.is_enabled = wm831x_dcdc_is_enabled,
|
|
.enable = wm831x_dcdc_enable,
|
|
.disable = wm831x_dcdc_disable,
|
|
.get_status = wm831x_dcdc_get_status,
|
|
.get_mode = wm831x_dcdc_get_mode,
|
|
.set_mode = wm831x_dcdc_set_mode,
|
|
.set_suspend_mode = wm831x_dcdc_set_suspend_mode,
|
|
};
|
|
|
|
static __devinit int wm831x_buckp_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->dcdc);
|
|
struct wm831x_dcdc *dcdc;
|
|
struct resource *res;
|
|
int ret, irq;
|
|
|
|
dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
|
|
|
|
if (pdata == NULL || pdata->dcdc[id] == NULL)
|
|
return -ENODEV;
|
|
|
|
dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL);
|
|
if (dcdc == NULL) {
|
|
dev_err(&pdev->dev, "Unable to allocate private data\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dcdc->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;
|
|
}
|
|
dcdc->base = res->start;
|
|
|
|
snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
|
|
dcdc->desc.name = dcdc->name;
|
|
dcdc->desc.id = id;
|
|
dcdc->desc.type = REGULATOR_VOLTAGE;
|
|
dcdc->desc.n_voltages = WM831X_BUCKP_MAX_SELECTOR + 1;
|
|
dcdc->desc.ops = &wm831x_buckp_ops;
|
|
dcdc->desc.owner = THIS_MODULE;
|
|
|
|
dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
|
|
pdata->dcdc[id], dcdc);
|
|
if (IS_ERR(dcdc->regulator)) {
|
|
ret = PTR_ERR(dcdc->regulator);
|
|
dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
|
|
id + 1, ret);
|
|
goto err;
|
|
}
|
|
|
|
irq = platform_get_irq_byname(pdev, "UV");
|
|
ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
|
|
IRQF_TRIGGER_RISING, dcdc->name, dcdc);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
|
|
irq, ret);
|
|
goto err_regulator;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, dcdc);
|
|
|
|
return 0;
|
|
|
|
err_regulator:
|
|
regulator_unregister(dcdc->regulator);
|
|
err:
|
|
kfree(dcdc);
|
|
return ret;
|
|
}
|
|
|
|
static __devexit int wm831x_buckp_remove(struct platform_device *pdev)
|
|
{
|
|
struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
|
|
struct wm831x *wm831x = dcdc->wm831x;
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
|
|
regulator_unregister(dcdc->regulator);
|
|
kfree(dcdc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver wm831x_buckp_driver = {
|
|
.probe = wm831x_buckp_probe,
|
|
.remove = __devexit_p(wm831x_buckp_remove),
|
|
.driver = {
|
|
.name = "wm831x-buckp",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* DCDC boost convertors
|
|
*/
|
|
|
|
static int wm831x_boostp_get_status(struct regulator_dev *rdev)
|
|
{
|
|
struct wm831x_dcdc *dcdc = rdev_get_drvdata(rdev);
|
|
struct wm831x *wm831x = dcdc->wm831x;
|
|
int ret;
|
|
|
|
/* First, check for errors */
|
|
ret = wm831x_reg_read(wm831x, WM831X_DCDC_UV_STATUS);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (ret & (1 << rdev_get_id(rdev))) {
|
|
dev_dbg(wm831x->dev, "DCDC%d under voltage\n",
|
|
rdev_get_id(rdev) + 1);
|
|
return REGULATOR_STATUS_ERROR;
|
|
}
|
|
|
|
/* Is the regulator on? */
|
|
ret = wm831x_reg_read(wm831x, WM831X_DCDC_STATUS);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret & (1 << rdev_get_id(rdev)))
|
|
return REGULATOR_STATUS_ON;
|
|
else
|
|
return REGULATOR_STATUS_OFF;
|
|
}
|
|
|
|
static struct regulator_ops wm831x_boostp_ops = {
|
|
.get_status = wm831x_boostp_get_status,
|
|
|
|
.is_enabled = wm831x_dcdc_is_enabled,
|
|
.enable = wm831x_dcdc_enable,
|
|
.disable = wm831x_dcdc_disable,
|
|
};
|
|
|
|
static __devinit int wm831x_boostp_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->dcdc);
|
|
struct wm831x_dcdc *dcdc;
|
|
struct resource *res;
|
|
int ret, irq;
|
|
|
|
dev_dbg(&pdev->dev, "Probing DCDC%d\n", id + 1);
|
|
|
|
if (pdata == NULL || pdata->dcdc[id] == NULL)
|
|
return -ENODEV;
|
|
|
|
dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL);
|
|
if (dcdc == NULL) {
|
|
dev_err(&pdev->dev, "Unable to allocate private data\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dcdc->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;
|
|
}
|
|
dcdc->base = res->start;
|
|
|
|
snprintf(dcdc->name, sizeof(dcdc->name), "DCDC%d", id + 1);
|
|
dcdc->desc.name = dcdc->name;
|
|
dcdc->desc.id = id;
|
|
dcdc->desc.type = REGULATOR_VOLTAGE;
|
|
dcdc->desc.ops = &wm831x_boostp_ops;
|
|
dcdc->desc.owner = THIS_MODULE;
|
|
|
|
dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
|
|
pdata->dcdc[id], dcdc);
|
|
if (IS_ERR(dcdc->regulator)) {
|
|
ret = PTR_ERR(dcdc->regulator);
|
|
dev_err(wm831x->dev, "Failed to register DCDC%d: %d\n",
|
|
id + 1, ret);
|
|
goto err;
|
|
}
|
|
|
|
irq = platform_get_irq_byname(pdev, "UV");
|
|
ret = request_threaded_irq(irq, NULL, wm831x_dcdc_uv_irq,
|
|
IRQF_TRIGGER_RISING, dcdc->name,
|
|
dcdc);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "Failed to request UV IRQ %d: %d\n",
|
|
irq, ret);
|
|
goto err_regulator;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, dcdc);
|
|
|
|
return 0;
|
|
|
|
err_regulator:
|
|
regulator_unregister(dcdc->regulator);
|
|
err:
|
|
kfree(dcdc);
|
|
return ret;
|
|
}
|
|
|
|
static __devexit int wm831x_boostp_remove(struct platform_device *pdev)
|
|
{
|
|
struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
free_irq(platform_get_irq_byname(pdev, "UV"), dcdc);
|
|
regulator_unregister(dcdc->regulator);
|
|
kfree(dcdc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver wm831x_boostp_driver = {
|
|
.probe = wm831x_boostp_probe,
|
|
.remove = __devexit_p(wm831x_boostp_remove),
|
|
.driver = {
|
|
.name = "wm831x-boostp",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* External Power Enable
|
|
*
|
|
* These aren't actually DCDCs but look like them in hardware so share
|
|
* code.
|
|
*/
|
|
|
|
#define WM831X_EPE_BASE 6
|
|
|
|
static struct regulator_ops wm831x_epe_ops = {
|
|
.is_enabled = wm831x_dcdc_is_enabled,
|
|
.enable = wm831x_dcdc_enable,
|
|
.disable = wm831x_dcdc_disable,
|
|
.get_status = wm831x_dcdc_get_status,
|
|
};
|
|
|
|
static __devinit int wm831x_epe_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->epe);
|
|
struct wm831x_dcdc *dcdc;
|
|
int ret;
|
|
|
|
dev_dbg(&pdev->dev, "Probing EPE%d\n", id + 1);
|
|
|
|
if (pdata == NULL || pdata->epe[id] == NULL)
|
|
return -ENODEV;
|
|
|
|
dcdc = kzalloc(sizeof(struct wm831x_dcdc), GFP_KERNEL);
|
|
if (dcdc == NULL) {
|
|
dev_err(&pdev->dev, "Unable to allocate private data\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dcdc->wm831x = wm831x;
|
|
|
|
/* For current parts this is correct; probably need to revisit
|
|
* in future.
|
|
*/
|
|
snprintf(dcdc->name, sizeof(dcdc->name), "EPE%d", id + 1);
|
|
dcdc->desc.name = dcdc->name;
|
|
dcdc->desc.id = id + WM831X_EPE_BASE; /* Offset in DCDC registers */
|
|
dcdc->desc.ops = &wm831x_epe_ops;
|
|
dcdc->desc.type = REGULATOR_VOLTAGE;
|
|
dcdc->desc.owner = THIS_MODULE;
|
|
|
|
dcdc->regulator = regulator_register(&dcdc->desc, &pdev->dev,
|
|
pdata->epe[id], dcdc);
|
|
if (IS_ERR(dcdc->regulator)) {
|
|
ret = PTR_ERR(dcdc->regulator);
|
|
dev_err(wm831x->dev, "Failed to register EPE%d: %d\n",
|
|
id + 1, ret);
|
|
goto err;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, dcdc);
|
|
|
|
return 0;
|
|
|
|
err:
|
|
kfree(dcdc);
|
|
return ret;
|
|
}
|
|
|
|
static __devexit int wm831x_epe_remove(struct platform_device *pdev)
|
|
{
|
|
struct wm831x_dcdc *dcdc = platform_get_drvdata(pdev);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
regulator_unregister(dcdc->regulator);
|
|
kfree(dcdc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver wm831x_epe_driver = {
|
|
.probe = wm831x_epe_probe,
|
|
.remove = __devexit_p(wm831x_epe_remove),
|
|
.driver = {
|
|
.name = "wm831x-epe",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init wm831x_dcdc_init(void)
|
|
{
|
|
int ret;
|
|
ret = platform_driver_register(&wm831x_buckv_driver);
|
|
if (ret != 0)
|
|
pr_err("Failed to register WM831x BUCKV driver: %d\n", ret);
|
|
|
|
ret = platform_driver_register(&wm831x_buckp_driver);
|
|
if (ret != 0)
|
|
pr_err("Failed to register WM831x BUCKP driver: %d\n", ret);
|
|
|
|
ret = platform_driver_register(&wm831x_boostp_driver);
|
|
if (ret != 0)
|
|
pr_err("Failed to register WM831x BOOST driver: %d\n", ret);
|
|
|
|
ret = platform_driver_register(&wm831x_epe_driver);
|
|
if (ret != 0)
|
|
pr_err("Failed to register WM831x EPE driver: %d\n", ret);
|
|
|
|
return 0;
|
|
}
|
|
subsys_initcall(wm831x_dcdc_init);
|
|
|
|
static void __exit wm831x_dcdc_exit(void)
|
|
{
|
|
platform_driver_unregister(&wm831x_epe_driver);
|
|
platform_driver_unregister(&wm831x_boostp_driver);
|
|
platform_driver_unregister(&wm831x_buckp_driver);
|
|
platform_driver_unregister(&wm831x_buckv_driver);
|
|
}
|
|
module_exit(wm831x_dcdc_exit);
|
|
|
|
/* Module information */
|
|
MODULE_AUTHOR("Mark Brown");
|
|
MODULE_DESCRIPTION("WM831x DC-DC convertor driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:wm831x-buckv");
|
|
MODULE_ALIAS("platform:wm831x-buckp");
|