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net: fec: Add "phy-reset-active-low" property to DT 

We need that for a custom hardware that needs the reverse reset
sequence.

Signed-off-by: Bernhard Walle <bernhard@bwalle.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bernhard Walle 2016-02-08 21:21:13 +01:00 committed by David S. Miller
parent 12d6b91720
commit 64f10f6ebf
2 changed files with 9 additions and 2 deletions
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3
Documentation/devicetree/bindings/net/fsl-fec.txt
View File

@ -12,6 +12,9 @@ Optional properties:
only if property "phy-reset-gpios" is available. Missing the property only if property "phy-reset-gpios" is available. Missing the property
will have the duration be 1 millisecond. Numbers greater than 1000 are will have the duration be 1 millisecond. Numbers greater than 1000 are
invalid and 1 millisecond will be used instead. invalid and 1 millisecond will be used instead.
- phy-reset-active-low : If present then the reset sequence using the GPIO
specified in the "phy-reset-gpios" property is reversed (H=reset state,
L=operation state).
- phy-supply : regulator that powers the Ethernet PHY. - phy-supply : regulator that powers the Ethernet PHY.
- phy-handle : phandle to the PHY device connected to this device. - phy-handle : phandle to the PHY device connected to this device.
- fixed-link : Assume a fixed link. See fixed-link.txt in the same directory. - fixed-link : Assume a fixed link. See fixed-link.txt in the same directory.

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

@ -3191,6 +3191,7 @@ static int fec_enet_init(struct net_device *ndev)
static void fec_reset_phy(struct platform_device *pdev) static void fec_reset_phy(struct platform_device *pdev)
{ {
int err, phy_reset; int err, phy_reset;
bool active_low = false;
int msec = 1; int msec = 1;
struct device_node *np = pdev->dev.of_node; struct device_node *np = pdev->dev.of_node;
@ -3206,14 +3207,17 @@ static void fec_reset_phy(struct platform_device *pdev)
if (!gpio_is_valid(phy_reset)) if (!gpio_is_valid(phy_reset))
return; return;
active_low = of_property_read_bool(np, "phy-reset-active-low");
err = devm_gpio_request_one(&pdev->dev, phy_reset, err = devm_gpio_request_one(&pdev->dev, phy_reset,
GPIOF_OUT_INIT_LOW, "phy-reset"); active_low ? GPIOF_OUT_INIT_HIGH : GPIOF_OUT_INIT_LOW,
"phy-reset");
if (err) { if (err) {
dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", err); dev_err(&pdev->dev, "failed to get phy-reset-gpios: %d\n", err);
return; return;
} }
msleep(msec); msleep(msec);
gpio_set_value_cansleep(phy_reset, 1); gpio_set_value_cansleep(phy_reset, !active_low);
} }
#else /* CONFIG_OF */ #else /* CONFIG_OF */
static void fec_reset_phy(struct platform_device *pdev) static void fec_reset_phy(struct platform_device *pdev)