netdev - [PATCH] net: mvmdio: get and enable optional clock

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1365332988-9053-1-git-send-email-sebastian.hesselbarth@gmail.com>
Date:	Sun,  7 Apr 2013 13:09:47 +0200
From:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
To:	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	Florian Fainelli <florian@...nwrt.org>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] net: mvmdio: get and enable optional clock

Marvell mdio driver uses internal registers that can be clock gated on
some SoCs. This patch just adds optional clock handling, to allow to pass
and enable the corresponding clock.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
---
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Florian Fainelli <florian@...nwrt.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/net/ethernet/marvell/mvmdio.c |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c
index 7b5158f..e2f6626 100644
--- a/drivers/net/ethernet/marvell/mvmdio.c
+++ b/drivers/net/ethernet/marvell/mvmdio.c
@@ -28,6 +28,7 @@
 #include <linux/platform_device.h>
 #include <linux/delay.h>
 #include <linux/io.h>
+#include <linux/clk.h>
 #include <linux/of_mdio.h>
 #include <linux/sched.h>
 #include <linux/wait.h>
@@ -46,6 +47,7 @@
 struct orion_mdio_dev {
 	struct mutex lock;
 	void __iomem *regs;
+	struct clk *clk;
 	/*
 	 * If we have access to the error interrupt pin (which is
 	 * somewhat misnamed as it not only reflects internal errors
@@ -230,6 +232,10 @@ static int orion_mdio_probe(struct platform_device *pdev)
 
 	init_waitqueue_head(&dev->smi_busy_wait);
 
+	dev->clk = devm_clk_get(&pdev->dev, NULL);
+	if (!IS_ERR(dev->clk))
+		clk_prepare_enable(dev->clk);
+
 	dev->err_interrupt = platform_get_irq(pdev, 0);
 	if (dev->err_interrupt != -ENXIO) {
 		ret = devm_request_irq(&pdev->dev, dev->err_interrupt,
@@ -258,6 +264,8 @@ static int orion_mdio_probe(struct platform_device *pdev)
 	return 0;
 
 out_mdio:
+	if (!IS_ERR(dev->clk))
+		clk_disable_unprepare(dev->clk);
 	kfree(bus->irq);
 	mdiobus_free(bus);
 	return ret;
@@ -272,6 +280,9 @@ static int orion_mdio_remove(struct platform_device *pdev)
 	mdiobus_unregister(bus);
 	kfree(bus->irq);
 	mdiobus_free(bus);
+	if (!IS_ERR(dev->clk))
+		clk_disable_unprepare(dev->clk);
+
 	return 0;
 }
 
-- 
1.7.10.4

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html