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authorStephen Warren <swarren@nvidia.com>2011-11-29 18:36:48 -0700
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-11-30 09:38:13 +0000
commitbf55499e6ee927e047feed85349365481289bd75 (patch)
tree1a66f9005fffdeb8669c7af55375cd91b9a01a75 /sound/soc/tegra
parentb00adf76a6fa492c39f8225fc42debc01bbbdc1d (diff)
ASoC: Tegra I2S: Add device tree binding
Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/tegra')
-rw-r--r--sound/soc/tegra/tegra_i2s.c27
1 files changed, 22 insertions, 5 deletions
diff --git a/sound/soc/tegra/tegra_i2s.c b/sound/soc/tegra/tegra_i2s.c
index ca4d0c0a913e..33509de52540 100644
--- a/sound/soc/tegra/tegra_i2s.c
+++ b/sound/soc/tegra/tegra_i2s.c
@@ -36,6 +36,7 @@
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/io.h>
+#include <linux/of.h>
#include <mach/iomap.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -331,6 +332,8 @@ static __devinit int tegra_i2s_platform_probe(struct platform_device *pdev)
{
struct tegra_i2s * i2s;
struct resource *mem, *memregion, *dmareq;
+ u32 of_dma[2];
+ u32 dma_ch;
int ret;
i2s = devm_kzalloc(&pdev->dev, sizeof(struct tegra_i2s), GFP_KERNEL);
@@ -360,9 +363,16 @@ static __devinit int tegra_i2s_platform_probe(struct platform_device *pdev)
dmareq = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!dmareq) {
- dev_err(&pdev->dev, "No DMA resource\n");
- ret = -ENODEV;
- goto err_clk_put;
+ if (of_property_read_u32_array(pdev->dev.of_node,
+ "nvidia,dma-request-selector",
+ of_dma, 2) < 0) {
+ dev_err(&pdev->dev, "No DMA resource\n");
+ ret = -ENODEV;
+ goto err_clk_put;
+ }
+ dma_ch = of_dma[1];
+ } else {
+ dma_ch = dmareq->start;
}
memregion = devm_request_mem_region(&pdev->dev, mem->start,
@@ -383,12 +393,12 @@ static __devinit int tegra_i2s_platform_probe(struct platform_device *pdev)
i2s->capture_dma_data.addr = mem->start + TEGRA_I2S_FIFO2;
i2s->capture_dma_data.wrap = 4;
i2s->capture_dma_data.width = 32;
- i2s->capture_dma_data.req_sel = dmareq->start;
+ i2s->capture_dma_data.req_sel = dma_ch;
i2s->playback_dma_data.addr = mem->start + TEGRA_I2S_FIFO1;
i2s->playback_dma_data.wrap = 4;
i2s->playback_dma_data.width = 32;
- i2s->playback_dma_data.req_sel = dmareq->start;
+ i2s->playback_dma_data.req_sel = dma_ch;
i2s->reg_ctrl = TEGRA_I2S_CTRL_FIFO_FORMAT_PACKED;
@@ -422,10 +432,16 @@ static int __devexit tegra_i2s_platform_remove(struct platform_device *pdev)
return 0;
}
+static const struct of_device_id tegra_i2s_of_match[] __devinitconst = {
+ { .compatible = "nvidia,tegra20-i2s", },
+ {},
+};
+
static struct platform_driver tegra_i2s_driver = {
.driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
+ .of_match_table = tegra_i2s_of_match,
},
.probe = tegra_i2s_platform_probe,
.remove = __devexit_p(tegra_i2s_platform_remove),
@@ -436,3 +452,4 @@ MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
MODULE_DESCRIPTION("Tegra I2S ASoC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_DEVICE_TABLE(of, tegra_i2s_of_match);