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Subject[PATCH v3 2/3] ASoC: s3c24xx-i2s: pass DMA channels as platform data
Date
This is a minor cleanup to make the s3c2412-i2s and s3c24xx-i2s
drivers independent of the mach/dma.h header file and to allow
removing the dependency on the specific dmaengine driver in the
next patch.

As a side not, only the s3c24xx-i2s driver seems to still be
used, while the definition of the s3c2412-i2s platform device was
removed in commit 6d259a25b56d ("ARM: SAMSUNG: use static
declaration when it is not used in other files") after it had
never been referenced since its introduction in f0fba2ad1b6b
("ASoC: multi-component - ASoC Multi-Component Support").

Apparently it should have been used by mach-jive.c, but that
never happened. My patch at this point leaves the current state
unchanged, we can decide whether to fix or delete the jive
driver and s3c2412-i2s another time.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
v3: fix typo in s3c24xx-i2s.c
v2: check for NULL pdata

diff --git a/arch/arm/plat-samsung/devs.c b/arch/arm/plat-samsung/devs.c
index 9c03b0e83bd5..1c2582f4b587 100644
--- a/arch/arm/plat-samsung/devs.c
+++ b/arch/arm/plat-samsung/devs.c
@@ -571,6 +571,11 @@ static struct resource s3c_iis_resource[] = {
[0] = DEFINE_RES_MEM(S3C24XX_PA_IIS, S3C24XX_SZ_IIS),
};

+static struct s3c_audio_pdata s3c_iis_platdata = {
+ .dma_playback = (void *)DMACH_I2S_OUT,
+ .dma_capture = (void *)DMACH_I2S_IN,
+};
+
struct platform_device s3c_device_iis = {
.name = "s3c24xx-iis",
.id = -1,
@@ -579,6 +584,7 @@ struct platform_device s3c_device_iis = {
.dev = {
.dma_mask = &samsung_device_dma_mask,
.coherent_dma_mask = DMA_BIT_MASK(32),
+ .platform_data = &s3c_iis_platdata,
}
};
#endif /* CONFIG_PLAT_S3C24XX */
diff --git a/sound/soc/samsung/s3c2412-i2s.c b/sound/soc/samsung/s3c2412-i2s.c
index 77d27c85a32a..105317f523f2 100644
--- a/sound/soc/samsung/s3c2412-i2s.c
+++ b/sound/soc/samsung/s3c2412-i2s.c
@@ -33,14 +33,14 @@
#include "regs-i2s-v2.h"
#include "s3c2412-i2s.h"

+#include <linux/platform_data/asoc-s3c.h>
+
static struct s3c_dma_params s3c2412_i2s_pcm_stereo_out = {
- .slave = (void *)(uintptr_t)DMACH_I2S_OUT,
.ch_name = "tx",
.dma_size = 4,
};

static struct s3c_dma_params s3c2412_i2s_pcm_stereo_in = {
- .slave = (void *)(uintptr_t)DMACH_I2S_IN,
.ch_name = "rx",
.dma_size = 4,
};
@@ -152,6 +152,12 @@ static int s3c2412_iis_dev_probe(struct platform_device *pdev)
{
int ret = 0;
struct resource *res;
+ struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev);
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "missing platform data");
+ return -ENXIO;
+ }

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
s3c2412_i2s.regs = devm_ioremap_resource(&pdev->dev, res);
@@ -159,7 +165,9 @@ static int s3c2412_iis_dev_probe(struct platform_device *pdev)
return PTR_ERR(s3c2412_i2s.regs);

s3c2412_i2s_pcm_stereo_out.dma_addr = res->start + S3C2412_IISTXD;
+ s3c2412_i2s_pcm_stereo_out.slave = pdata->dma_playback;
s3c2412_i2s_pcm_stereo_in.dma_addr = res->start + S3C2412_IISRXD;
+ s3c2412_i2s_pcm_stereo_in.slave = pdata->dma_capture;

ret = s3c_i2sv2_register_component(&pdev->dev, -1,
&s3c2412_i2s_component,
diff --git a/sound/soc/samsung/s3c24xx-i2s.c b/sound/soc/samsung/s3c24xx-i2s.c
index 9da3a77ea2c7..9e6a5bc012e3 100644
--- a/sound/soc/samsung/s3c24xx-i2s.c
+++ b/sound/soc/samsung/s3c24xx-i2s.c
@@ -31,14 +31,14 @@
#include "dma.h"
#include "s3c24xx-i2s.h"

+#include <linux/platform_data/asoc-s3c.h>
+
static struct s3c_dma_params s3c24xx_i2s_pcm_stereo_out = {
- .slave = (void *)(uintptr_t)DMACH_I2S_OUT,
.ch_name = "tx",
.dma_size = 2,
};

static struct s3c_dma_params s3c24xx_i2s_pcm_stereo_in = {
- .slave = (void *)(uintptr_t)DMACH_I2S_IN,
.ch_name = "rx",
.dma_size = 2,
};
@@ -454,6 +454,12 @@ static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
{
int ret = 0;
struct resource *res;
+ struct s3c_audio_pdata *pdata = dev_get_platdata(&pdev->dev);
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "missing platform data");
+ return -ENXIO;
+ }

res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
@@ -465,7 +471,9 @@ static int s3c24xx_iis_dev_probe(struct platform_device *pdev)
return PTR_ERR(s3c24xx_i2s.regs);

s3c24xx_i2s_pcm_stereo_out.dma_addr = res->start + S3C2410_IISFIFO;
+ s3c24xx_i2s_pcm_stereo_out.slave = pdata->dma_playback;
s3c24xx_i2s_pcm_stereo_in.dma_addr = res->start + S3C2410_IISFIFO;
+ s3c24xx_i2s_pcm_stereo_in.slave = pdata->dma_capture;

ret = devm_snd_soc_register_component(&pdev->dev,
&s3c24xx_i2s_component, &s3c24xx_i2s_dai, 1);


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