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phy: nop-phy: Enable reset-gpios support

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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>
This commit is contained in:
Adam Ford
2022-01-29 07:27:47 -06:00
committed by Tom Rini
parent 07c79dd5fd
commit 3970c82a60
1 changed files with 42 additions and 3 deletions
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45
drivers/phy/nop-phy.c
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@@ -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) = {