linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Vivek Gautam <gautam.vivek@samsung.com>
To: linux-usb@vger.kernel.org
Cc: devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org,
	gregkh@linuxfoundation.org, balbi@ti.com, kishon@ti.com,
	kgene.kim@samsung.com, Vivek Gautam <gautam.vivek@samsung.com>
Subject: [PATCH 1/5] usb: dwc3: exynos: Add support for SCLK present on Exynos7
Date: Thu, 28 Aug 2014 13:31:56 +0530	[thread overview]
Message-ID: <1409212920-28526-2-git-send-email-gautam.vivek@samsung.com> (raw)
In-Reply-To: <1409212920-28526-1-git-send-email-gautam.vivek@samsung.com>

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 <gautam.vivek@samsung.com>
---
 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 f9fb8ad..bab6395 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;
 };
@@ -141,10 +142,17 @@ static int dwc3_exynos_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
+	/* Exynos7 has a special gate clock going to this IP */
+	exynos->sclk = devm_clk_get(dev, "usbdrd30_sclk");
+	if (IS_ERR(exynos->sclk))
+		dev_warn(dev, "couldn't get sclk\n");
+
 	exynos->dev	= dev;
 	exynos->clk	= clk;
 
 	clk_prepare_enable(exynos->clk);
+	if (!IS_ERR(exynos->sclk))
+		clk_prepare_enable(exynos->sclk);
 
 	exynos->vdd33 = devm_regulator_get(dev, "vdd33");
 	if (IS_ERR(exynos->vdd33)) {
@@ -187,6 +195,8 @@ err4:
 err3:
 	regulator_disable(exynos->vdd33);
 err2:
+	if (!IS_ERR(exynos->sclk))
+		clk_disable_unprepare(exynos->sclk);
 	clk_disable_unprepare(clk);
 	return ret;
 }
@@ -199,6 +209,8 @@ static int dwc3_exynos_remove(struct platform_device *pdev)
 	platform_device_unregister(exynos->usb2_phy);
 	platform_device_unregister(exynos->usb3_phy);
 
+	if (!IS_ERR(exynos->sclk))
+		clk_disable_unprepare(exynos->sclk);
 	clk_disable_unprepare(exynos->clk);
 
 	regulator_disable(exynos->vdd33);
@@ -220,6 +232,8 @@ static int dwc3_exynos_suspend(struct device *dev)
 {
 	struct dwc3_exynos *exynos = dev_get_drvdata(dev);
 
+	if (!IS_ERR(exynos->sclk))
+		clk_disable(exynos->sclk);
 	clk_disable(exynos->clk);
 
 	regulator_disable(exynos->vdd33);
@@ -245,6 +259,8 @@ static int dwc3_exynos_resume(struct device *dev)
 	}
 
 	clk_enable(exynos->clk);
+	if (!IS_ERR(exynos->sclk))
+		clk_enable(exynos->sclk);
 
 	/* runtime set active to reflect active state. */
 	pm_runtime_disable(dev);
-- 
1.7.10.4


  reply	other threads:[~2014-08-28  8:02 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-28  8:01 [PATCH 0/5] usb: dwc3/phy-exynos5-usbdrd: Extend support to Exynos7 Vivek Gautam
2014-08-28  8:01 ` Vivek Gautam [this message]
2014-08-28 18:48   ` [PATCH 1/5] usb: dwc3: exynos: Add support for SCLK present on Exynos7 Mark Rutland
2014-09-02 10:39     ` Vivek Gautam
2014-09-02 11:01       ` Mark Rutland
2014-09-02 14:35       ` Felipe Balbi
2014-08-28  8:01 ` [PATCH 2/5] phy: exynos5-usbdrd: Add pipe-clk and utmi-clk support Vivek Gautam
2014-08-28 18:50   ` Mark Rutland
2014-08-28  8:01 ` [PATCH 3/5] phy: exynos5-usbdrd: Add facility for VBUS-BOOST-5V supply Vivek Gautam
2014-08-28 19:16   ` Felipe Balbi
2014-09-01  7:57     ` Vivek Gautam
2014-08-28  8:01 ` [PATCH 4/5] usb: dwc3: Adding Kconfig dependency for Exynos7 Vivek Gautam
2014-08-28 19:28   ` Felipe Balbi
2014-09-03  3:53     ` Vivek Gautam
2014-08-28  8:02 ` [PATCH 5/5] phy: exynos5-usbdrd: " Vivek Gautam
2014-08-28 15:06   ` Daniele Forsi
2014-09-01  8:00     ` Vivek Gautam
2014-09-02 14:37       ` Felipe Balbi
2014-09-03  4:02         ` Vivek Gautam
2014-09-03 14:46           ` Felipe Balbi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1409212920-28526-2-git-send-email-gautam.vivek@samsung.com \
    --to=gautam.vivek@samsung.com \
    --cc=balbi@ti.com \
    --cc=devicetree@vger.kernel.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=kgene.kim@samsung.com \
    --cc=kishon@ti.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-omap@vger.kernel.org \
    --cc=linux-samsung-soc@vger.kernel.org \
    --cc=linux-usb@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).