Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753510AbaJGKTv (ORCPT ); Tue, 7 Oct 2014 06:19:51 -0400 Received: from mail-pd0-f176.google.com ([209.85.192.176]:57152 "EHLO mail-pd0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753328AbaJGKTp (ORCPT ); Tue, 7 Oct 2014 06:19:45 -0400 From: Vivek Gautam To: linux-usb@vger.kernel.org Cc: linux-samsung-soc@vger.kernel.org, linux-omap@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, gregkh@linuxfoundation.org, balbi@ti.com, kgene.kim@samsung.com, mark.rutland@arm.com, pawel.moll@arm.com, robh+dt@kernel.org, kishon@ti.com, Vivek Gautam Subject: [PATCH v2 1/4] dwc3: exynos: Add support for SCLK present on Exynos7 Date: Tue, 7 Oct 2014 15:49:33 +0530 Message-Id: <1412677176-3850-2-git-send-email-gautam.vivek@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1412677176-3850-1-git-send-email-gautam.vivek@samsung.com> References: <1412677176-3850-1-git-send-email-gautam.vivek@samsung.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Exynos7 also has a separate special gate clock going to the IP apart from the usual AHB clock. So add support for the same. Signed-off-by: Vivek Gautam --- drivers/usb/dwc3/dwc3-exynos.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c index 3951a65..7dc6a98 100644 --- a/drivers/usb/dwc3/dwc3-exynos.c +++ b/drivers/usb/dwc3/dwc3-exynos.c @@ -35,6 +35,7 @@ struct dwc3_exynos { struct device *dev; struct clk *clk; + struct clk *sclk; struct regulator *vdd33; struct regulator *vdd10; }; @@ -139,10 +140,21 @@ static int dwc3_exynos_probe(struct platform_device *pdev) return -EINVAL; } + /* + * Exynos7 has a special gate clock going to this IP, + * which in earlier SoCs was probably concealed. + */ + exynos->sclk = devm_clk_get(dev, "usbdrd30_sclk"); + if (IS_ERR(exynos->sclk)) { + dev_info(dev, "no sclk specified\n"); + exynos->sclk = NULL; + } + exynos->dev = dev; exynos->clk = clk; clk_prepare_enable(exynos->clk); + clk_prepare_enable(exynos->sclk); exynos->vdd33 = devm_regulator_get(dev, "vdd33"); if (IS_ERR(exynos->vdd33)) { @@ -185,6 +197,7 @@ err4: err3: regulator_disable(exynos->vdd33); err2: + clk_disable_unprepare(exynos->sclk); clk_disable_unprepare(clk); return ret; } @@ -197,6 +210,7 @@ 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->sclk); clk_disable_unprepare(exynos->clk); regulator_disable(exynos->vdd33); @@ -218,6 +232,7 @@ static int dwc3_exynos_suspend(struct device *dev) { struct dwc3_exynos *exynos = dev_get_drvdata(dev); + clk_disable(exynos->sclk); clk_disable(exynos->clk); regulator_disable(exynos->vdd33); @@ -243,6 +258,7 @@ static int dwc3_exynos_resume(struct device *dev) } clk_enable(exynos->clk); + clk_enable(exynos->sclk); /* runtime set active to reflect active state. */ pm_runtime_disable(dev); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/