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Commit a3caad0a authored by Shawn Guo's avatar Shawn Guo Committed by David S. Miller
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net: fec: add phy-reset-duration for device tree probe 



Different boards may require different phy reset duration.  Add property
phy-reset-duration for device tree probe, so that the boards that need
a longer reset duration can specify it in their device tree.

Signed-off-by: default avatarShawn Guo <shawn.guo@linaro.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c9040af2

Documentation/devicetree/bindings/net/fsl-fec.txt

+4 −0
Original line number Diff line number Diff line
@@ -11,6 +11,10 @@ Required properties: 
Optional properties:

- local-mac-address : 6 bytes, mac address

- phy-reset-gpios : Should specify the gpio for phy reset

- phy-reset-duration : Reset duration in milliseconds.  Should present

  only if property "phy-reset-gpios" is available.  Missing the property

  will have the duration be 1 millisecond.  Numbers greater than 1000 are

  invalid and 1 millisecond will be used instead.



Example:

drivers/net/ethernet/freescale/fec.c

+7 −1
Original line number Diff line number Diff line
@@ -1507,11 +1507,17 @@ static int __devinit fec_get_phy_mode_dt(struct platform_device *pdev) 
static void __devinit fec_reset_phy(struct platform_device *pdev)

{

	int err, phy_reset;

	int msec = 1;

	struct device_node *np = pdev->dev.of_node;



	if (!np)

		return;



	of_property_read_u32(np, "phy-reset-duration", &msec);

	/* A sane reset duration should not be longer than 1s */

	if (msec > 1000)

		msec = 1;



	phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);

	err = devm_gpio_request_one(&pdev->dev, phy_reset,

				    GPIOF_OUT_INIT_LOW, "phy-reset");
@@ -1519,7 +1525,7 @@ static void __devinit fec_reset_phy(struct platform_device *pdev) 
		pr_debug("FEC: failed to get gpio phy-reset: %d\n", err);

		return;

	}

	msleep(1);

	msleep(msec);

	gpio_set_value(phy_reset, 1);

}

#else /* CONFIG_OF */