ASoC: Add platform data for WM1250 EV1 GPIOs
The WM1250 EV1 has some GPIOs which can be used to control the behaviour at runtime. Request them all if supplied and add a set_bias_level() function to start and stop the clocks. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown
parent
85a843c50f
commit
213eb0fb1e
|
|
@ -0,0 +1,27 @@
|
|||
/*
|
||||
* 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
|
||||
|
|
@ -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,
|
||||
&wm1250_ev1_dai, 1);
|
||||
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;
|
||||
}
|
||||
|
|
|
|||
Reference in New Issue