From 72d996fc7a01c2e4d581a15db7d001e2799ffb29 Mon Sep 17 00:00:00 2001 From: Vivek Gautam Date: Fri, 21 Nov 2014 19:05:46 +0530 Subject: [PATCH] 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 Signed-off-by: Vivek Gautam Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/dwc3-exynos.c | 11 +++++++++++ 1 file changed, 11 insertions(+) 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); -- 2.30.2