If an ethernet PHY can be reset by a GPIO, it can be specified in DT. Add a binding and code to parse it, request the GPIO and take the PHY out of reset.
Signed-off-by: Guennadi Liakhovetski <[email protected]> Cc: [email protected] Cc: [email protected] --- Documentation/devicetree/bindings/net/sh_ether.txt | 2 ++ drivers/net/ethernet/renesas/sh_eth.c | 9 ++++++++- 2 files changed, 10 insertions(+), 1 deletions(-) diff --git a/Documentation/devicetree/bindings/net/sh_ether.txt b/Documentation/devicetree/bindings/net/sh_ether.txt index c11e45d..edaf683 100644 --- a/Documentation/devicetree/bindings/net/sh_ether.txt +++ b/Documentation/devicetree/bindings/net/sh_ether.txt @@ -12,6 +12,7 @@ Required properties: - interrupts: Interrupt mapping for the sh_eth interrupt sources (vector id). - phy-mode: String, operation mode of the PHY interface. +- phy-reset-gpios: PHY reset GPIO tuple - sh-eth,edmac-endian: String, endian of sh_eth dmac. - sh-eth,register-type: String, register type of sh_eth. Please select "gigabit", "fast-sh4" or @@ -37,6 +38,7 @@ Example (armadillo800eva): reg = <0xe9a00000 0x800>, <0xe9a01800 0x800>; interrupts = <0x500>; phy-mode = "mii"; + phy-reset-gpios = <&gpio 18 0>; sh-eth,edmac-endian = "little"; sh-eth,register-type = "gigabit"; sh-eth,phy-id = <0>; diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index 1f64848..06035a2 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -20,6 +20,7 @@ * the file called "COPYING". */ +#include <linux/gpio.h> #include <linux/init.h> #include <linux/module.h> #include <linux/kernel.h> @@ -33,6 +34,7 @@ #include <linux/netdevice.h> #include <linux/of.h> #include <linux/of_device.h> +#include <linux/of_gpio.h> #include <linux/of_platform.h> #include <linux/of_address.h> #include <linux/of_irq.h> @@ -2376,10 +2378,11 @@ sh_eth_of_get_register_type(struct device_node *np) static struct sh_eth_plat_data * sh_eth_parse_dt(struct device *dev, struct net_device *ndev) { - int ret; + int ret, gpio; const char *of_str; struct device_node *np = dev->of_node; struct sh_eth_plat_data *pdata; + enum of_gpio_flags flags; pdata = devm_kzalloc(dev, sizeof(struct sh_eth_plat_data), GFP_KERNEL); @@ -2420,6 +2423,10 @@ sh_eth_parse_dt(struct device *dev, struct net_device *ndev) else pdata->needs_init = 0; + gpio = of_get_named_gpio_flags(np, "phy-reset-gpios", 0, &flags); + if (gpio_is_valid(gpio) && !devm_gpio_request(dev, gpio, NULL)) + gpio_direction_output(gpio, !!(flags & OF_GPIO_ACTIVE_LOW)); + #ifdef CONFIG_OF_NET if (!is_valid_ether_addr(ndev->dev_addr)) { const char *macaddr = of_get_mac_address(np); -- 1.7.2.5 _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
