renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-19 10:44:14 +08:00
Code

net: fec: add phy-reset-duration for device tree probe

Browse Source 
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: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shawn Guo 2012-06-27 03:45:24 +00:00 committed by David S. Miller
parent c9040af264
commit a3caad0a16
2 changed files with 11 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/devicetree/bindings/net/fsl-fec.txt
View File

@ -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:

8
drivers/net/ethernet/freescale/fec.c
View File

@ -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 */