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usb: musb: da8xx: Add support of suspend / resume

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Implement PM methods specifics for da8xx glue.
The only thing to do is to power off the phy.
As the registers are in retention during suspend,
there is no need to save them.

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexandre Bailon 2017-02-01 21:30:18 -06:00 committed by Greg Kroah-Hartman
parent ca7c1d5094
commit 71f5a0ad9e
1 changed files with 29 additions and 0 deletions
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29
drivers/usb/musb/da8xx.c
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@ -573,6 +573,34 @@ static int da8xx_remove(struct platform_device *pdev)
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int da8xx_suspend(struct device *dev)
{
int ret;
struct da8xx_glue *glue = dev_get_drvdata(dev);
ret = phy_power_off(glue->phy);
if (ret)
return ret;
clk_disable_unprepare(glue->clk);
return 0;
}
static int da8xx_resume(struct device *dev)
{
int ret;
struct da8xx_glue *glue = dev_get_drvdata(dev);
ret = clk_prepare_enable(glue->clk);
if (ret)
return ret;
return phy_power_on(glue->phy);
}
#endif
static SIMPLE_DEV_PM_OPS(da8xx_pm_ops, da8xx_suspend, da8xx_resume);
#ifdef CONFIG_OF
static const struct of_device_id da8xx_id_table[] = {
{
@ -588,6 +616,7 @@ static struct platform_driver da8xx_driver = {
.remove = da8xx_remove,
.driver = {
.name = "musb-da8xx",
.pm = &da8xx_pm_ops,
.of_match_table = of_match_ptr(da8xx_id_table),
},
};