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authorFabio Estevam <fabio.estevam@nxp.com>2016-05-04 19:33:59 -0300
committerMark Brown <broonie@kernel.org>2016-05-05 16:44:22 +0100
commit4d2458507d0b465c62ae80f3e81b8c008ec96b05 (patch)
tree8cee8aa3c236270a174063cc5cdd95f8a94808fc /sound
parent1593af62b694b3638edf577e3b763fa1a4ca3d76 (diff)
downloadlinux-stericsson-4d2458507d0b465c62ae80f3e81b8c008ec96b05.tar.gz
ASoC: fsl_sai: Allow setting the SAI MCLK direction
On mx6ul the General Purpose Register 1 (GPR1) contains the following bits for configuring the direction of the SAI MCLKs: SAI1_MCLK_DIR, SAI2_MCLK_DIR, SAI3_MCLK_DIR Introduce the "fsl,sai-mclk-direction-output" optional property to allow configuring the SAI_MCLK outputs. Tested on a imx6ul-evk board. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Acked-by: Nicolin Chen <nicoleotsuka@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/fsl/fsl_sai.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index d8b673f7c577..2147994ab46f 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -21,6 +21,8 @@
#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
#include "fsl_sai.h"
#include "imx-pcm.h"
@@ -786,10 +788,12 @@ static int fsl_sai_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct fsl_sai *sai;
+ struct regmap *gpr;
struct resource *res;
void __iomem *base;
char tmp[8];
int irq, ret, i;
+ int index;
sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
if (!sai)
@@ -878,6 +882,22 @@ static int fsl_sai_probe(struct platform_device *pdev)
fsl_sai_dai.symmetric_samplebits = 0;
}
+ if (of_find_property(np, "fsl,sai-mclk-direction-output", NULL) &&
+ of_device_is_compatible(pdev->dev.of_node, "fsl,imx6ul-sai")) {
+ gpr = syscon_regmap_lookup_by_compatible("fsl,imx6ul-iomuxc-gpr");
+ if (IS_ERR(gpr)) {
+ dev_err(&pdev->dev, "cannot find iomuxc registers\n");
+ return PTR_ERR(gpr);
+ }
+
+ index = of_alias_get_id(np, "sai");
+ if (index < 0)
+ return index;
+
+ regmap_update_bits(gpr, IOMUXC_GPR1, MCLK_DIR(index),
+ MCLK_DIR(index));
+ }
+
sai->dma_params_rx.addr = res->start + FSL_SAI_RDR;
sai->dma_params_tx.addr = res->start + FSL_SAI_TDR;
sai->dma_params_rx.maxburst = FSL_SAI_MAXBURST_RX;