[PATCH] ASoC: samsung-i2s: Add 192kHz config option
From: Richard Fitzgerald
Date: Mon Nov 17 2014 - 05:59:23 EST
Adds QUIRK_SUPPORTS_192KHZ to allow 192kHz rate
to be selected for hardware that supports it.
Signed-off-by: Richard Fitzgerald <rf@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
.../devicetree/bindings/sound/samsung-i2s.txt | 2 ++
include/linux/platform_data/asoc-s3c.h | 1 +
sound/soc/samsung/i2s.c | 8 ++++++++
3 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/samsung-i2s.txt b/Documentation/devicetree/bindings/sound/samsung-i2s.txt
index d188296..c3f3950 100644
--- a/Documentation/devicetree/bindings/sound/samsung-i2s.txt
+++ b/Documentation/devicetree/bindings/sound/samsung-i2s.txt
@@ -40,6 +40,8 @@ Optional SoC Specific Properties:
sub system(used in secondary sound source).
- pinctrl-0: Should specify pin control groups used for this controller.
- pinctrl-names: Should contain only one value - "default".
+- samsung,supports-192khz: specify this (without a value) if you want to allow
+ 192000 sample rate over the I2S link.
Example:
diff --git a/include/linux/platform_data/asoc-s3c.h b/include/linux/platform_data/asoc-s3c.h
index 5e0bc77..6d0702d 100644
--- a/include/linux/platform_data/asoc-s3c.h
+++ b/include/linux/platform_data/asoc-s3c.h
@@ -28,6 +28,7 @@ struct samsung_i2s {
#define QUIRK_NEED_RSTCLR (1 << 3)
#define QUIRK_SUPPORTS_TDM (1 << 4)
#define QUIRK_SUPPORTS_IDMA (1 << 5)
+#define QUIRK_SUPPORTS_192KHZ (1 << 6)
/* Quirks of the I2S controller */
u32 quirks;
dma_addr_t idma_addr;
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index 947352d..f688e89 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -1219,6 +1219,9 @@ static int samsung_i2s_probe(struct platform_device *pdev)
"specified");
}
}
+
+ if (of_find_property(np, "samsung,supports-192khz", NULL))
+ quirks |= QUIRK_SUPPORTS_192KHZ;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -1247,6 +1250,11 @@ static int samsung_i2s_probe(struct platform_device *pdev)
if (quirks & QUIRK_PRI_6CHAN)
pri_dai->i2s_dai_drv.playback.channels_max = 6;
+ if (quirks & QUIRK_SUPPORTS_192KHZ) {
+ pri_dai->i2s_dai_drv.playback.rates |= SNDRV_PCM_RATE_192000;
+ pri_dai->i2s_dai_drv.capture.rates |= SNDRV_PCM_RATE_192000;
+ }
+
if (quirks & QUIRK_SEC_DAI) {
sec_dai = i2s_alloc_dai(pdev, true);
if (!sec_dai) {
--
1.7.2.5
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