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| author | Adam Ford <aford173@gmail.com> | 2022-01-29 07:27:47 -0600 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2022-02-11 09:00:48 -0500 |
| commit | d1fbb9afd2d6b1e5e309cd4500ed1f2d61cf8ddf (patch) | |
| tree | f8f5055315a74b3ee333bec2a28e6b8943db9b7f | |
| parent | acfc4a6e933970bf706c4b3b3b316b8f599ae2ab (diff) | |
| download | u-boot-d1fbb9afd2d6b1e5e309cd4500ed1f2d61cf8ddf.zip u-boot-d1fbb9afd2d6b1e5e309cd4500ed1f2d61cf8ddf.tar.gz u-boot-d1fbb9afd2d6b1e5e309cd4500ed1f2d61cf8ddf.tar.bz2 | |
phy: nop-phy: Enable reset-gpios support
Some usb-nop-xceiv devices use a gpio take them out
of reset. Add a reset function to put them into that
state. This is similar to how Linux handles the
usb-nop-xceiv driver.
Signed-off-by: Adam Ford <aford173@gmail.com>
| -rw-r--r-- | drivers/phy/nop-phy.c | 45 |
1 files changed, 42 insertions, 3 deletions
diff --git a/drivers/phy/nop-phy.c b/drivers/phy/nop-phy.c index 9f12ebc..b08eedd 100644 --- a/drivers/phy/nop-phy.c +++ b/drivers/phy/nop-phy.c @@ -10,25 +10,54 @@ #include <dm/device.h> #include <dm/device_compat.h> #include <generic-phy.h> +#include <asm-generic/gpio.h> struct nop_phy_priv { struct clk_bulk bulk; +#if CONFIG_IS_ENABLED(DM_GPIO) + struct gpio_desc reset_gpio; +#endif }; +#if CONFIG_IS_ENABLED(DM_GPIO) +static int nop_phy_reset(struct phy *phy) +{ + struct nop_phy_priv *priv = dev_get_priv(phy->dev); + + /* Return if there is no gpio since it's optional */ + if (!dm_gpio_is_valid(&priv->reset_gpio)) + return 0; + + return dm_gpio_set_value(&priv->reset_gpio, false); +} +#endif + static int nop_phy_init(struct phy *phy) { struct nop_phy_priv *priv = dev_get_priv(phy->dev); + int ret = 0; - if (CONFIG_IS_ENABLED(CLK)) - return clk_enable_bulk(&priv->bulk); + if (CONFIG_IS_ENABLED(CLK)) { + ret = clk_enable_bulk(&priv->bulk); + if (ret) + return ret; + } +#if CONFIG_IS_ENABLED(DM_GPIO) + ret = nop_phy_reset(phy); + if (ret) { + if (CONFIG_IS_ENABLED(CLK)) + clk_disable_bulk(&priv->bulk); + return ret; + } +#endif return 0; } static int nop_phy_probe(struct udevice *dev) { struct nop_phy_priv *priv = dev_get_priv(dev); - int ret; + int ret = 0; if (CONFIG_IS_ENABLED(CLK)) { ret = clk_get_bulk(dev, &priv->bulk); @@ -37,6 +66,13 @@ static int nop_phy_probe(struct udevice *dev) return ret; } } +#if CONFIG_IS_ENABLED(DM_GPIO) + ret = gpio_request_by_name(dev, "reset-gpios", 0, + &priv->reset_gpio, + GPIOD_IS_OUT); +#endif + if (ret != -ENOENT) + return ret; return 0; } @@ -49,6 +85,9 @@ static const struct udevice_id nop_phy_ids[] = { static struct phy_ops nop_phy_ops = { .init = nop_phy_init, +#if CONFIG_IS_ENABLED(DM_GPIO) + .reset = nop_phy_reset, +#endif }; U_BOOT_DRIVER(nop_phy) = { |