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>
diff --git a/drivers/sound/wm8994.c b/drivers/sound/wm8994.c
index 293903a..3b673b4 100644
--- a/drivers/sound/wm8994.c
+++ b/drivers/sound/wm8994.c
@@ -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 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 @@
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;