diff options
Diffstat (limited to 'drivers/net/phy/phy.c')
| -rw-r--r-- | drivers/net/phy/phy.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 9cec04a0c94..270176cfe62 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -18,6 +18,8 @@ #include <phy.h> #include <errno.h> #include <asm/global_data.h> +#include <asm-generic/gpio.h> +#include <dm/device_compat.h> #include <dm/of_extra.h> #include <linux/bitops.h> #include <linux/delay.h> @@ -769,6 +771,59 @@ int miiphy_reset(const char *devname, unsigned char addr) return phy_reset(phydev); } +#if CONFIG_IS_ENABLED(DM_GPIO) && CONFIG_IS_ENABLED(OF_REAL) && \ + !IS_ENABLED(CONFIG_DM_ETH_PHY) +int phy_gpio_reset(struct udevice *dev) +{ + struct ofnode_phandle_args phandle_args; + struct gpio_desc gpio; + u32 assert, deassert; + ofnode node; + int ret; + + ret = dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0, + &phandle_args); + /* No PHY handle is OK */ + if (ret) + return 0; + + node = phandle_args.node; + if (!ofnode_valid(node)) + return -EINVAL; + + ret = gpio_request_by_name_nodev(node, "reset-gpios", 0, &gpio, + GPIOD_IS_OUT | GPIOD_ACTIVE_LOW); + /* No PHY reset GPIO is OK */ + if (ret) + return 0; + + assert = ofnode_read_u32_default(node, "reset-assert-us", 20000); + deassert = ofnode_read_u32_default(node, "reset-deassert-us", 1000); + ret = dm_gpio_set_value(&gpio, 1); + if (ret) { + dev_err(dev, "Failed assert gpio, err: %d\n", ret); + return ret; + } + + udelay(assert); + + ret = dm_gpio_set_value(&gpio, 0); + if (ret) { + dev_err(dev, "Failed deassert gpio, err: %d\n", ret); + return ret; + } + + udelay(deassert); + + return 0; +} +#else +int phy_gpio_reset(struct udevice *dev) +{ + return 0; +} +#endif + struct phy_device *phy_find_by_mask(struct mii_dev *bus, uint phy_mask) { /* Reset the bus */ |