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Sound: WM8994: Add FDT support to codec

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This patch adds FDT support to the codec.

Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Rajeshwari Shinde 2012-12-26 20:03:18 +00:00 • committed by Minkyu Kang
parent f482310c6d
commit 6647c7ac8e
2 changed files with 74 additions and 6 deletions
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74
drivers/sound/wm8994.c
View file

@ -26,9 +26,11 @@
#include <asm/io.h>
#include <common.h>
#include <div64.h>
#include <fdtdec.h>
#include <i2c.h>
#include <i2s.h>
#include <sound.h>
#include <asm/arch/sound.h>
#include "wm8994.h"
#include "wm8994_registers.h"
@ -77,6 +79,7 @@ static int bclk_divs[] = {
static struct wm8994_priv g_wm8994_info;
static unsigned char g_wm8994_i2c_dev_addr;
static struct sound_codec_info g_codec_info;
/*
* Initialise I2C for wm 8994
@ -747,13 +750,80 @@ err:
return -1;
}
/*
* Gets fdt values for wm8994 config parameters
*
* @param pcodec_info codec information structure
* @param blob FDT blob
* @return int value, 0 for success
*/
static int get_codec_values(struct sound_codec_info *pcodec_info,
const void *blob)
{
int error = 0;
#ifdef CONFIG_OF_CONTROL
enum fdt_compat_id compat;
int node;
int parent;
/* Get the node from FDT for codec */
node = fdtdec_next_compatible(blob, 0, COMPAT_WOLFSON_WM8994_CODEC);
if (node <= 0) {
debug("EXYNOS_SOUND: No node for codec in device tree\n");
debug("node = %d\n", node);
return -1;
}
parent = fdt_parent_offset(blob, node);
if (parent < 0) {
debug("%s: Cannot find node parent\n", __func__);
return -1;
}
compat = fdtdec_lookup(blob, parent);
switch (compat) {
case COMPAT_SAMSUNG_S3C2440_I2C:
pcodec_info->i2c_bus = i2c_get_bus_num_fdt(parent);
error |= pcodec_info->i2c_bus;
debug("i2c bus = %d\n", pcodec_info->i2c_bus);
pcodec_info->i2c_dev_addr = fdtdec_get_int(blob, node,
"reg", 0);
error |= pcodec_info->i2c_dev_addr;
debug("i2c dev addr = %d\n", pcodec_info->i2c_dev_addr);
break;
default:
debug("%s: Unknown compat id %d\n", __func__, compat);
return -1;
}
#else
pcodec_info->i2c_bus = AUDIO_I2C_BUS;
pcodec_info->i2c_dev_addr = AUDIO_I2C_REG;
debug("i2c dev addr = %d\n", pcodec_info->i2c_dev_addr);
#endif
pcodec_info->codec_type = CODEC_WM_8994;
if (error == -1) {
debug("fail to get wm8994 codec node properties\n");
return -1;
}
return 0;
}
/*wm8994 Device Initialisation */
int wm8994_init(struct sound_codec_info *pcodec_info,
enum en_audio_interface aif_id,
int wm8994_init(const void *blob, enum en_audio_interface aif_id,
int sampling_rate, int mclk_freq,
int bits_per_sample, unsigned int channels)
{
int ret = 0;
struct sound_codec_info *pcodec_info = &g_codec_info;
/* Get the codec Values */
if (get_codec_values(pcodec_info, blob) < 0) {
debug("FDT Codec values failed\n");
return -1;
}
/* shift the device address by 1 for 7 bit addressing */
g_wm8994_i2c_dev_addr = pcodec_info->i2c_dev_addr;

6
drivers/sound/wm8994.h
View file

@ -69,8 +69,7 @@ enum wm8994_type {
/*
* intialise wm8994 sound codec device for the given configuration
*
* @param pcodec_info pointer value of the sound codec info structure
* parsed from device tree
* @param blob FDT node for codec values
* @param aif_id enum value of codec interface port in which
* soc i2s is connected
* @param sampling_rate Sampling rate ranges between from 8khz to 96khz
@ -80,8 +79,7 @@ enum wm8994_type {
*
* @returns -1 for error and 0 Success.
*/
int wm8994_init(struct sound_codec_info *pcodec_info,
enum en_audio_interface aif_id,
int wm8994_init(const void *blob, enum en_audio_interface aif_id,
int sampling_rate, int mclk_freq,
int bits_per_sample, unsigned int channels);
#endif /*__WM8994_H__ */