The designware eqos DT binding has support for specifying reset GPIOs. Add support for them.
Signed-off-by: Sascha Hauer <[email protected]> --- drivers/net/designware_eqos.c | 33 +++++++++++++++++++++++++++++++++ drivers/of/of_gpio.c | 7 +++++++ 2 files changed, 40 insertions(+) diff --git a/drivers/net/designware_eqos.c b/drivers/net/designware_eqos.c index d2baaeaf63..0321024169 100644 --- a/drivers/net/designware_eqos.c +++ b/drivers/net/designware_eqos.c @@ -8,9 +8,11 @@ #include <common.h> #include <init.h> +#include <gpio.h> #include <dma.h> #include <net.h> #include <of_net.h> +#include <of_gpio.h> #include <linux/iopoll.h> #include <linux/time.h> #include <linux/sizes.h> @@ -189,6 +191,33 @@ struct eqos_desc { #define MII_BUSY (1 << 0) +static int eqos_phy_reset(struct device_d *dev, struct eqos *eqos) +{ + int phy_reset; + int ret; + u32 delays[3] = { 0, 0, 0 }; + + phy_reset = of_get_named_gpio(dev->device_node, "snps,reset-gpio", 0); + + if (!gpio_is_valid(phy_reset)) + return 0; + + ret = gpio_request(phy_reset, "phy-reset"); + if (ret) + return ret; + + of_property_read_u32_array(dev->device_node, + "snps,reset-delays-us", + delays, ARRAY_SIZE(delays)); + + gpio_direction_active(phy_reset, 0); + udelay(delays[1]); + gpio_set_active(phy_reset, 1); + udelay(delays[2]); + + return 0; +} + static int eqos_mdio_wait_idle(struct eqos *eqos) { u32 idle; @@ -843,6 +872,10 @@ int eqos_probe(struct device_d *dev, const struct eqos_ops *ops, void *priv) if (ret) return ret; + ret = eqos_phy_reset(dev, eqos); + if (ret) + return ret; + ret = mdiobus_register(miibus); if (ret) return ret; diff --git a/drivers/of/of_gpio.c b/drivers/of/of_gpio.c index 7cbeeaf69e..e1cafdc848 100644 --- a/drivers/of/of_gpio.c +++ b/drivers/of/of_gpio.c @@ -35,6 +35,13 @@ static void of_gpio_flags_quirks(struct device_node *np, if (active_low) *flags |= OF_GPIO_ACTIVE_LOW; } + + /* Legacy handling of stmmac's active-low PHY reset line */ + if (IS_ENABLED(CONFIG_DRIVER_NET_DESIGNWARE_EQOS) && + !strcmp(propname, "snps,reset-gpio") && + of_property_read_bool(np, "snps,reset-active-low")) + *flags |= OF_GPIO_ACTIVE_LOW; + } /** -- 2.29.2 _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
