diff options
| author | Vivek Gautam <gautam.vivek@samsung.com> | 2014-11-21 19:05:46 +0530 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-11-21 09:06:43 -0600 |
| commit | 72d996fc7a01c2e4d581a15db7d001e2799ffb29 (patch) | |
| tree | befa43b8232d147fba1703864ce2842ad729695e /drivers/usb/dwc3 | |
| parent | c1a3acaadde7eb260f4fd4ec87cb87d3ffeed979 (diff) | |
usb: dwc3: exynos: Add provision for suspend clock
DWC3 controller on Exynos SoC series have separate control for
suspend clock which replaces pipe3_rx_pclk as clock source to
a small part of DWC3 core that operates when SS PHY is in its
lowest power state (P3) in states SS.disabled and U3.
Suggested-by: Anton Tikhomirov <av.tikhomirov@samsung.com>
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/dwc3')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-exynos.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c index 14f85a08a4cf..a1782d86a226 100644 --- a/drivers/usb/dwc3/dwc3-exynos.c +++ b/drivers/usb/dwc3/dwc3-exynos.c @@ -34,6 +34,8 @@ struct dwc3_exynos { struct device *dev; struct clk *clk; + struct clk *susp_clk; + struct regulator *vdd33; struct regulator *vdd10; }; @@ -140,6 +142,13 @@ static int dwc3_exynos_probe(struct platform_device *pdev) } clk_prepare_enable(exynos->clk); + exynos->susp_clk = devm_clk_get(dev, "usbdrd30_susp_clk"); + if (IS_ERR(exynos->susp_clk)) { + dev_dbg(dev, "no suspend clk specified\n"); + exynos->susp_clk = NULL; + } + clk_prepare_enable(exynos->susp_clk); + exynos->vdd33 = devm_regulator_get(dev, "vdd33"); if (IS_ERR(exynos->vdd33)) { ret = PTR_ERR(exynos->vdd33); @@ -181,6 +190,7 @@ err4: err3: regulator_disable(exynos->vdd33); err2: + clk_disable_unprepare(exynos->susp_clk); clk_disable_unprepare(exynos->clk); return ret; } @@ -193,6 +203,7 @@ static int dwc3_exynos_remove(struct platform_device *pdev) platform_device_unregister(exynos->usb2_phy); platform_device_unregister(exynos->usb3_phy); + clk_disable_unprepare(exynos->susp_clk); clk_disable_unprepare(exynos->clk); regulator_disable(exynos->vdd33); |