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 (file)
--- 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 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;

diff --git a/drivers/sound/wm8994.h b/drivers/sound/wm8994.h
index a8f0de1..a1e8335 100644 (file)
--- a/drivers/sound/wm8994.h
+++ b/drivers/sound/wm8994.h
@@ -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__ */