ASoC: Add platform data for WM1250 EV1 GPIOs (213eb0fb) · Commits · 戴 / test

include/sound/wm1250-ev1.h

0 → 100644

+27 −0

Original line number	Diff line number	Diff line
		/*
		* linux/sound/wm1250-ev1.h - Platform data for WM1250-EV1
		*
		* Copyright 2011 Wolfson Microelectronics. PLC.
		*
		* 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.
		*/

		#ifndef __LINUX_SND_WM1250_EV1_H
		#define __LINUX_SND_WM1250_EV1_H

		#define WM1250_EV1_NUM_GPIOS 5

		#define WM1250_EV1_GPIO_CLK_ENA 0
		#define WM1250_EV1_GPIO_CLK_SEL0 1
		#define WM1250_EV1_GPIO_CLK_SEL1 2
		#define WM1250_EV1_GPIO_OSR 3
		#define WM1250_EV1_GPIO_MASTER 4


		struct wm1250_ev1_pdata {
		int gpios[WM1250_EV1_NUM_GPIOS];
		};

		#endif

sound/soc/codecs/wm1250-ev1.c

+118 −3

Original line number	Diff line number	Diff line
		@@ -12,10 +12,59 @@

		#include <linux/init.h>
		#include <linux/module.h>
		#include <linux/slab.h>
		#include <linux/i2c.h>
		#include <linux/gpio.h>

		#include <sound/soc.h>
		#include <sound/soc-dapm.h>
		#include <sound/wm1250-ev1.h>

		static const char *wm1250_gpio_names[WM1250_EV1_NUM_GPIOS] = {
		"WM1250 CLK_ENA",
		"WM1250 CLK_SEL0",
		"WM1250 CLK_SEL1",
		"WM1250 OSR",
		"WM1250 MASTER",
		};

		struct wm1250_priv {
		struct gpio gpios[WM1250_EV1_NUM_GPIOS];
		};

		static int wm1250_ev1_set_bias_level(struct snd_soc_codec *codec,
		enum snd_soc_bias_level level)
		{
		struct wm1250_priv *wm1250 = dev_get_drvdata(codec->dev);
		int ena;

		if (wm1250)
		ena = wm1250->gpios[WM1250_EV1_GPIO_CLK_ENA].gpio;
		else
		ena = -1;

		switch (level) {
		case SND_SOC_BIAS_ON:
		break;

		case SND_SOC_BIAS_PREPARE:
		break;

		case SND_SOC_BIAS_STANDBY:
		if (ena >= 0)
		gpio_set_value_cansleep(ena, 1);
		break;

		case SND_SOC_BIAS_OFF:
		if (ena >= 0)
		gpio_set_value_cansleep(ena, 0);
		break;
		}

		codec->dapm.bias_level = level;

		return 0;
		}

		static const struct snd_soc_dapm_widget wm1250_ev1_dapm_widgets[] = {
		SND_SOC_DAPM_ADC("ADC", "wm1250-ev1 Capture", SND_SOC_NOPM, 0, 0),
		@@ -53,12 +102,66 @@ static struct snd_soc_codec_driver soc_codec_dev_wm1250_ev1 = {
		.num_dapm_widgets = ARRAY_SIZE(wm1250_ev1_dapm_widgets),
		.dapm_routes = wm1250_ev1_dapm_routes,
		.num_dapm_routes = ARRAY_SIZE(wm1250_ev1_dapm_routes),

		.set_bias_level = wm1250_ev1_set_bias_level,
		};

		static int __devinit wm1250_ev1_pdata(struct i2c_client *i2c)
		{
		struct wm1250_ev1_pdata *pdata = dev_get_platdata(&i2c->dev);
		struct wm1250_priv *wm1250;
		int i, ret;

		if (!pdata)
		return 0;

		wm1250 = kzalloc(sizeof(*wm1250), GFP_KERNEL);
		if (!wm1250) {
		dev_err(&i2c->dev, "Unable to allocate private data\n");
		ret = -ENOMEM;
		goto err;
		}

		for (i = 0; i < ARRAY_SIZE(wm1250->gpios); i++) {
		wm1250->gpios[i].gpio = pdata->gpios[i];
		wm1250->gpios[i].label = wm1250_gpio_names[i];
		wm1250->gpios[i].flags = GPIOF_OUT_INIT_LOW;
		}
		wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL0].flags = GPIOF_OUT_INIT_HIGH;
		wm1250->gpios[WM1250_EV1_GPIO_CLK_SEL1].flags = GPIOF_OUT_INIT_HIGH;

		ret = gpio_request_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
		if (ret != 0) {
		dev_err(&i2c->dev, "Failed to get GPIOs: %d\n", ret);
		goto err_alloc;
		}

		dev_set_drvdata(&i2c->dev, wm1250);

		return ret;

		err_alloc:
		kfree(wm1250);
		err:
		return ret;
		}

		static void wm1250_ev1_free(struct i2c_client *i2c)
		{
		struct wm1250_priv *wm1250 = dev_get_drvdata(&i2c->dev);

		if (wm1250) {
		gpio_free_array(wm1250->gpios, ARRAY_SIZE(wm1250->gpios));
		kfree(wm1250);
		}
		}

		static int __devinit wm1250_ev1_probe(struct i2c_client *i2c,
		const struct i2c_device_id *i2c_id)
		{
		int id, board, rev;
		int id, board, rev, ret;

		dev_set_drvdata(&i2c->dev, NULL);

		board = i2c_smbus_read_byte_data(i2c, 0);
		if (board < 0) {
		@@ -76,13 +179,25 @@ static int __devinit wm1250_ev1_probe(struct i2c_client *i2c,

		dev_info(&i2c->dev, "revision %d\n", rev + 1);

		return snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1,
		ret = wm1250_ev1_pdata(i2c);
		if (ret != 0)
		return ret;

		ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm1250_ev1,
		&wm1250_ev1_dai, 1);
		if (ret != 0) {
		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
		wm1250_ev1_free(i2c);
		return ret;
		}

		return 0;
		}

		static int __devexit wm1250_ev1_remove(struct i2c_client *i2c)
		{
		snd_soc_unregister_codec(&i2c->dev);
		wm1250_ev1_free(i2c);

		return 0;
		}

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