path: root/drivers/mfd/arizona-core.c

/*
 * Arizona core driver
 *
 * Copyright 2012 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/regulator/machine.h>
#include <linux/slab.h>

#include <linux/mfd/arizona/core.h>
#include <linux/mfd/arizona/registers.h>

#include "arizona.h"

static const char *wm5102_core_supplies[] = {
	"AVDD",
	"DBVDD1",
};

int arizona_clk32k_enable(struct arizona *arizona)
{
	int ret = 0;

	mutex_lock(&arizona->clk_lock);

	arizona->clk32k_ref++;

	if (arizona->clk32k_ref == 1) {
		switch (arizona->pdata.clk32k_src) {
		case ARIZONA_32KZ_MCLK1:
			ret = pm_runtime_get_sync(arizona->dev);
			if (ret != 0)
				goto out;
			break;
		}

		ret = regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
					 ARIZONA_CLK_32K_ENA,
					 ARIZONA_CLK_32K_ENA);
	}

out:
	if (ret != 0)
		arizona->clk32k_ref--;

	mutex_unlock(&arizona->clk_lock);

	return ret;
}
EXPORT_SYMBOL_GPL(arizona_clk32k_enable);

int arizona_clk32k_disable(struct arizona *arizona)
{
	int ret = 0;

	mutex_lock(&arizona->clk_lock);

	BUG_ON(arizona->clk32k_ref <= 0);

	arizona->clk32k_ref--;

	if (arizona->clk32k_ref == 0) {
		regmap_update_bits(arizona->regmap, ARIZONA_CLOCK_32K_1,
				   ARIZONA_CLK_32K_ENA, 0);

		switch (arizona->pdata.clk32k_src) {
		case ARIZONA_32KZ_MCLK1:
			pm_runtime_put_sync(arizona->dev);
			break;
		}
	}

	mutex_unlock(&arizona->clk_lock);

	return ret;
}
EXPORT_SYMBOL_GPL(arizona_clk32k_disable);

static irqreturn_t arizona_clkgen_err(int irq, void *data)
{
	struct arizona *arizona = data;

	dev_err(arizona->dev, "CLKGEN error\n");

	return IRQ_HANDLED;
}

static irqreturn_t arizona_underclocked(int irq, void *data)
{
	struct arizona *arizona = data;
	unsigned int val;
	int ret;

	ret = regmap_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_8,
			  &val);
	if (ret != 0) {
		dev_err(arizona->dev, "Failed to read underclock status: %d\n",
			ret);
		return IRQ_NONE;
	}

	if (val & ARIZONA_AIF3_UNDERCLOCKED_STS)
		dev_err(arizona->dev, "AIF3 underclocked\n");
	if (val & ARIZONA_AIF2_UNDERCLOCKED_STS)
		dev_err(arizona->dev, "AIF2 underclocked\n");
	if (val & ARIZONA_AIF1_UNDERCLOCKED_STS)
		dev_err(arizona->dev, "AIF1 underclocked\n");
	if (val & ARIZONA_ISRC2_UNDERCLOCKED_STS)
		dev_err(arizona->dev, "ISRC2 underclocked\n");
	if (val & ARIZONA_ISRC1_UNDERCLOCKED_STS)
		dev_err(arizona->dev, "ISRC1 underclocked\n");
	if (val & ARIZONA_FX_UNDERCLOCKED_STS)
		dev_err(arizona->dev, "FX underclocked\n");
	if (val & ARIZONA_ASRC_UNDERCLOCKED_STS)
		dev_err(arizona->dev, "ASRC underclocked\n");
	if (val & ARIZONA_DAC_UNDERCLOCKED_STS)
		dev_err(arizona->dev, "DAC underclocked\n");
	if (val & ARIZONA_ADC_UNDERCLOCKED_STS)
		dev_err(arizona->dev, "ADC underclocked\n");
	if (val & ARIZONA_MIXER_UNDERCLOCKED_STS)
		dev_err(arizona->dev, "Mixer dropped sample\n");

	return IRQ_HANDLED;
}

static irqreturn_t arizona_overclocked(int irq, void *data)
{
	struct arizona *arizona = data;
	unsigned int val[2];
	int ret;
	
	ret = regmap_bulk_read(arizona->regmap, ARIZONA_INTERRUPT_RAW_STATUS_6,
			       &val[0], 2);
	if (ret != 0) {
		dev_err(arizona->dev</