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Sound: WM8994: Add FDT support to codec
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>
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2 changed files with 74 additions and 6 deletions
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@ -26,9 +26,11 @@
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#include <asm/io.h>
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#include <common.h>
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#include <div64.h>
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#include <fdtdec.h>
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#include <i2c.h>
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#include <i2s.h>
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#include <sound.h>
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#include <asm/arch/sound.h>
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#include "wm8994.h"
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#include "wm8994_registers.h"
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@ -77,6 +79,7 @@ static int bclk_divs[] = {
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static struct wm8994_priv g_wm8994_info;
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static unsigned char g_wm8994_i2c_dev_addr;
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static struct sound_codec_info g_codec_info;
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/*
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* Initialise I2C for wm 8994
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@ -747,13 +750,80 @@ err:
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return -1;
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}
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/*
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* Gets fdt values for wm8994 config parameters
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*
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* @param pcodec_info codec information structure
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* @param blob FDT blob
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* @return int value, 0 for success
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*/
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static int get_codec_values(struct sound_codec_info *pcodec_info,
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const void *blob)
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{
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int error = 0;
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#ifdef CONFIG_OF_CONTROL
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enum fdt_compat_id compat;
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int node;
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int parent;
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/* Get the node from FDT for codec */
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node = fdtdec_next_compatible(blob, 0, COMPAT_WOLFSON_WM8994_CODEC);
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if (node <= 0) {
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debug("EXYNOS_SOUND: No node for codec in device tree\n");
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debug("node = %d\n", node);
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return -1;
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}
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parent = fdt_parent_offset(blob, node);
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if (parent < 0) {
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debug("%s: Cannot find node parent\n", __func__);
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return -1;
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}
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compat = fdtdec_lookup(blob, parent);
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switch (compat) {
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case COMPAT_SAMSUNG_S3C2440_I2C:
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pcodec_info->i2c_bus = i2c_get_bus_num_fdt(parent);
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error |= pcodec_info->i2c_bus;
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debug("i2c bus = %d\n", pcodec_info->i2c_bus);
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pcodec_info->i2c_dev_addr = fdtdec_get_int(blob, node,
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"reg", 0);
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error |= pcodec_info->i2c_dev_addr;
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debug("i2c dev addr = %d\n", pcodec_info->i2c_dev_addr);
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break;
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default:
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debug("%s: Unknown compat id %d\n", __func__, compat);
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return -1;
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}
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#else
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pcodec_info->i2c_bus = AUDIO_I2C_BUS;
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pcodec_info->i2c_dev_addr = AUDIO_I2C_REG;
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debug("i2c dev addr = %d\n", pcodec_info->i2c_dev_addr);
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#endif
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pcodec_info->codec_type = CODEC_WM_8994;
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if (error == -1) {
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debug("fail to get wm8994 codec node properties\n");
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return -1;
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}
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return 0;
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}
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/*wm8994 Device Initialisation */
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int wm8994_init(struct sound_codec_info *pcodec_info,
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enum en_audio_interface aif_id,
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int wm8994_init(const void *blob, enum en_audio_interface aif_id,
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int sampling_rate, int mclk_freq,
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int bits_per_sample, unsigned int channels)
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{
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int ret = 0;
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struct sound_codec_info *pcodec_info = &g_codec_info;
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/* Get the codec Values */
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if (get_codec_values(pcodec_info, blob) < 0) {
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debug("FDT Codec values failed\n");
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return -1;
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}
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/* shift the device address by 1 for 7 bit addressing */
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g_wm8994_i2c_dev_addr = pcodec_info->i2c_dev_addr;
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@ -69,8 +69,7 @@ enum wm8994_type {
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/*
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* intialise wm8994 sound codec device for the given configuration
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*
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* @param pcodec_info pointer value of the sound codec info structure
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* parsed from device tree
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* @param blob FDT node for codec values
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* @param aif_id enum value of codec interface port in which
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* soc i2s is connected
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* @param sampling_rate Sampling rate ranges between from 8khz to 96khz
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@ -80,8 +79,7 @@ enum wm8994_type {
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*
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* @returns -1 for error and 0 Success.
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*/
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int wm8994_init(struct sound_codec_info *pcodec_info,
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enum en_audio_interface aif_id,
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int wm8994_init(const void *blob, enum en_audio_interface aif_id,
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int sampling_rate, int mclk_freq,
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int bits_per_sample, unsigned int channels);
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#endif /*__WM8994_H__ */
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