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authorPeter Ujfalusi <peter.ujfalusi@ti.com>2016-05-18 16:46:36 +0300
committerMark Brown <broonie@kernel.org>2016-05-30 16:19:17 +0100
commit65aca64d05b5eaa5ce15e18b458a8d338ddbd478 (patch)
tree542ac7ca09adcc1acf2fb533bd8f7520cfe93816 /sound/soc/omap
parent4a5c83744feb7608422e6c23fa4cce85569b678c (diff)
downloadlinux-65aca64d05b5eaa5ce15e18b458a8d338ddbd478.tar.bz2
ASoC: omap-mcpdm: Add support for pdmclk clock handling
McPDM module receives it's functional clock from external source. This clock is the pdmclk provided by the twl6040 audio IC. If the clock is not available all register accesses to McPDM fails and the module is not operational. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/omap')
-rw-r--r--sound/soc/omap/omap-mcpdm.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/sound/soc/omap/omap-mcpdm.c b/sound/soc/omap/omap-mcpdm.c
index 74d6e6fdcfd0..e7cdc51fd806 100644
--- a/sound/soc/omap/omap-mcpdm.c
+++ b/sound/soc/omap/omap-mcpdm.c
@@ -31,6 +31,7 @@
#include <linux/err.h>
#include <linux/io.h>
#include <linux/irq.h>
+#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <linux/of_device.h>
@@ -54,6 +55,7 @@ struct omap_mcpdm {
unsigned long phys_base;
void __iomem *io_base;
int irq;
+ struct clk *pdmclk;
struct mutex mutex;
@@ -388,6 +390,7 @@ static int omap_mcpdm_probe(struct snd_soc_dai *dai)
struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
int ret;
+ clk_prepare_enable(mcpdm->pdmclk);
pm_runtime_enable(mcpdm->dev);
/* Disable lines while request is ongoing */
@@ -422,6 +425,7 @@ static int omap_mcpdm_remove(struct snd_soc_dai *dai)
pm_runtime_disable(mcpdm->dev);
+ clk_disable_unprepare(mcpdm->pdmclk);
return 0;
}
@@ -441,6 +445,8 @@ static int omap_mcpdm_suspend(struct snd_soc_dai *dai)
mcpdm->pm_active_count++;
}
+ clk_disable_unprepare(mcpdm->pdmclk);
+
return 0;
}
@@ -448,6 +454,8 @@ static int omap_mcpdm_resume(struct snd_soc_dai *dai)
{
struct omap_mcpdm *mcpdm = snd_soc_dai_get_drvdata(dai);
+ clk_prepare_enable(mcpdm->pdmclk);
+
if (mcpdm->pm_active_count) {
while (mcpdm->pm_active_count--)
pm_runtime_get_sync(mcpdm->dev);
@@ -541,6 +549,15 @@ static int asoc_mcpdm_probe(struct platform_device *pdev)
mcpdm->dev = &pdev->dev;
+ mcpdm->pdmclk = devm_clk_get(&pdev->dev, "pdmclk");
+ if (IS_ERR(mcpdm->pdmclk)) {
+ if (PTR_ERR(mcpdm->pdmclk) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ dev_warn(&pdev->dev, "Error getting pdmclk (%ld)!\n",
+ PTR_ERR(mcpdm->pdmclk));
+ mcpdm->pdmclk = NULL;
+ }
+
ret = devm_snd_soc_register_component(&pdev->dev,
&omap_mcpdm_component,
&omap_mcpdm_dai, 1);