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ASoC: fsl: enable ssi clock in probe function 

For power saving, most IMX platform initilization code turns off
modules' clock, and expects driver turn on clock as needed.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Shawn Guo 2012-03-29 10:53:41 +08:00 committed by Mark Brown
parent 01651babb6
commit 95cd98f9a6
1 changed files with 22 additions and 2 deletions
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24
sound/soc/fsl/fsl_ssi.c
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@ -14,6 +14,7 @@
#include <linux/io.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/slab.h>
@ -119,6 +120,7 @@ struct fsl_ssi_private {
bool new_binding;
bool ssi_on_imx;
struct clk *clk;
struct platform_device *imx_pcm_pdev;
struct imx_pcm_dma_params dma_params_tx;
struct imx_pcm_dma_params dma_params_rx;
@ -722,6 +724,15 @@ static int __devinit fsl_ssi_probe(struct platform_device *pdev)
if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx21-ssi")) {
u32 dma_events[2];
ssi_private->ssi_on_imx = true;
ssi_private->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(ssi_private->clk)) {
ret = PTR_ERR(ssi_private->clk);
dev_err(&pdev->dev, "could not get clock: %d\n", ret);
goto error_irq;
}
clk_prepare_enable(ssi_private->clk);
/*
* We have burstsize be "fifo_depth - 2" to match the SSI
* watermark setting in fsl_ssi_startup().
@ -742,7 +753,7 @@ static int __devinit fsl_ssi_probe(struct platform_device *pdev)
"fsl,ssi-dma-events", dma_events, 2);
if (ret) {
dev_err(&pdev->dev, "could not get dma events\n");
goto error_irq;
goto error_clk;
}
ssi_private->dma_params_tx.dma = dma_events[0];
ssi_private->dma_params_rx.dma = dma_events[1];
@ -830,6 +841,12 @@ error_dev:
dev_set_drvdata(&pdev->dev, NULL);
device_remove_file(&pdev->dev, dev_attr);
error_clk:
if (ssi_private->ssi_on_imx) {
clk_disable_unprepare(ssi_private->clk);
clk_put(ssi_private->clk);
}
error_irq:
free_irq(ssi_private->irq, ssi_private);
@ -851,8 +868,11 @@ static int fsl_ssi_remove(struct platform_device *pdev)
if (!ssi_private->new_binding)
platform_device_unregister(ssi_private->pdev);
if (ssi_private->ssi_on_imx)
if (ssi_private->ssi_on_imx) {
platform_device_unregister(ssi_private->imx_pcm_pdev);
clk_disable_unprepare(ssi_private->clk);
clk_put(ssi_private->clk);
}
snd_soc_unregister_dai(&pdev->dev);
device_remove_file(&pdev->dev, &ssi_private->dev_attr);