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usb: gadget: tegra: Enable emc clock while usb is connected

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Change-Id: Icb94c516a580e29b42b1899e622c9b91f8701dd2
Signed-off-by: Benoit Goby <benoit@android.com>
This commit is contained in:
Benoit Goby
2011-01-20 15:42:52 -08:00
parent 1df24cc5cf
commit 66eaaf9564
1 changed files with 19 additions and 0 deletions
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19
drivers/usb/gadget/fsl_tegra_udc.c
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@@ -15,6 +15,7 @@
static struct tegra_usb_phy *phy;
static struct clk *udc_clk;
static struct clk *emc_clk;
static void *udc_base;
int fsl_udc_clk_init(struct platform_device *pdev)
@@ -33,6 +34,16 @@ int fsl_udc_clk_init(struct platform_device *pdev)
clk_enable(udc_clk);
emc_clk = clk_get(&pdev->dev, "emc");
if (IS_ERR(emc_clk)) {
dev_err(&pdev->dev, "Can't get emc clock\n");
err = PTR_ERR(emc_clk);
goto err_emc;
}
clk_enable(emc_clk);
clk_set_rate(emc_clk, 240000000);
/* we have to remap the registers ourselves as fsl_udc does not
* export them for us.
*/
@@ -65,6 +76,9 @@ int fsl_udc_clk_init(struct platform_device *pdev)
err1:
iounmap(udc_base);
err0:
clk_disable(emc_clk);
clk_put(emc_clk);
err_emc:
clk_disable(udc_clk);
clk_put(udc_clk);
return err;
@@ -82,16 +96,21 @@ void fsl_udc_clk_release(void)
clk_disable(udc_clk);
clk_put(udc_clk);
clk_disable(emc_clk);
clk_put(emc_clk);
}
void fsl_udc_clk_suspend(void)
{
tegra_usb_phy_power_off(phy);
clk_disable(udc_clk);
clk_disable(emc_clk);
}
void fsl_udc_clk_resume(void)
{
clk_enable(emc_clk);
clk_enable(udc_clk);
tegra_usb_phy_power_on(phy);
}