diff options
| author | Vikas Sajjan <vikas.sajjan@linaro.org> | 2012-10-16 13:45:38 +0400 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-03-18 13:17:03 +0400 |
| commit | 0646caf754aa3ce55ef978d7f4a3e3d0aab7a187 (patch) | |
| tree | 8e6ffd401266aeba46624f219af93c8c98e79ed6 /drivers/usb/dwc3 | |
| parent | f3e117f4437af5a2d1b72ae0fa1890dbf9bca72f (diff) | |
| download | linux-0646caf754aa3ce55ef978d7f4a3e3d0aab7a187.tar.xz | |
usb: dwc3: exynos: add basic suspend/resume support
Adds suspend and resume callbacks to exynos dwc3 driver as part of
power management support.
This change does gating of dwc3 clock during suspend/resume cycles.
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Vikas C Sajjan <vikas.sajjan@linaro.org>
CC: Doug Anderson <dianders@chromium.org>
Tested-by: Vivek Gautam <gautam.vivek@samsung.com>
[ balbi@ti.com : refreshed to current linus/master ]
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-exynos.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c index b082bec7343e..e12e45248862 100644 --- a/drivers/usb/dwc3/dwc3-exynos.c +++ b/drivers/usb/dwc3/dwc3-exynos.c @@ -187,12 +187,46 @@ static const struct of_device_id exynos_dwc3_match[] = { MODULE_DEVICE_TABLE(of, exynos_dwc3_match); #endif +#ifdef CONFIG_PM +static int dwc3_exynos_suspend(struct device *dev) +{ + struct dwc3_exynos *exynos = dev_get_drvdata(dev); + + clk_disable(exynos->clk); + + return 0; +} + +static int dwc3_exynos_resume(struct device *dev) +{ + struct dwc3_exynos *exynos = dev_get_drvdata(dev); + + clk_enable(exynos->clk); + + /* runtime set active to reflect active state. */ + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + return 0; +} + +static const struct dev_pm_ops dwc3_exynos_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(dwc3_exynos_suspend, dwc3_exynos_resume) +}; + +#define DEV_PM_OPS (&dwc3_exynos_dev_pm_ops) +#else +#define DEV_PM_OPS NULL +#endif /* CONFIG_PM */ + static struct platform_driver dwc3_exynos_driver = { .probe = dwc3_exynos_probe, .remove = dwc3_exynos_remove, .driver = { .name = "exynos-dwc3", .of_match_table = of_match_ptr(exynos_dwc3_match), + .pm = DEV_PM_OPS, }, }; |