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Commit 3d604da1 authored by Sebastian Hesselbarth's avatar Sebastian Hesselbarth Committed by David S. Miller
Browse files

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: default avatarSebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: default avatarFlorian Fainelli <florian@openwrt.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d5b40921

drivers/net/ethernet/marvell/mvmdio.c

+11 −0
Original line number Diff line number Diff line
@@ -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;

}