diff options
| author | Adam Ford <aford173@gmail.com> | 2022-01-29 16:27:47 +0300 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2022-02-11 19:29:23 +0300 |
| commit | 3970c82a60857b72afcb676697caf9c979dab946 (patch) | |
| tree | 72ec1fdc61954af03dc1710374785f3931f763bb /drivers/phy/nop-phy.c | |
| parent | 07c79dd5fdeaefb39c9e7a97f3b66de63109a18d (diff) | |
| download | u-boot-3970c82a60857b72afcb676697caf9c979dab946.tar.xz | |
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>
Diffstat (limited to 'drivers/phy/nop-phy.c')
| -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 9f12ebc062..b08eedd4d4 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) = { |