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phy: phy-imx8mq-usb: add vbus regulator support

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Add support for enabling and disabling vbus-supply regulator found
on several imx8mp boards in the usb3_phy0 and usb3_phy1 nodes.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
This commit is contained in:
Tim Harvey 2023-07-13 11:56:07 -07:00 committed by Marek Vasut
parent 9871b0e5d0
commit c90729c463
1 changed files with 36 additions and 3 deletions
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39
drivers/phy/phy-imx8mq-usb.c
View file

@ -14,6 +14,8 @@
#include <linux/delay.h>
#include <linux/err.h>
#include <clk.h>
#include <dm/device_compat.h>
#include <power/regulator.h>
#define PHY_CTRL0 0x0
#define PHY_CTRL0_REF_SSP_EN BIT(2)
@ -81,6 +83,7 @@ struct imx8mq_usb_phy {
#endif
void __iomem *base;
enum imx8mpq_phy_type type;
struct udevice *vbus_supply;
};
static const struct udevice_id imx8mq_usb_phy_of_match[] = {
@ -173,9 +176,9 @@ static int imx8mq_usb_phy_power_on(struct phy *usb_phy)
struct udevice *dev = usb_phy->dev;
struct imx8mq_usb_phy *imx_phy = dev_get_priv(dev);
u32 value;
int ret;
#if CONFIG_IS_ENABLED(CLK)
int ret;
ret = clk_enable(&imx_phy->phy_clk);
if (ret) {
printf("Failed to enable usb phy clock\n");
@ -183,12 +186,26 @@ static int imx8mq_usb_phy_power_on(struct phy *usb_phy)
}
#endif
if (CONFIG_IS_ENABLED(DM_REGULATOR) && imx_phy->vbus_supply) {
ret = regulator_set_enable_if_allowed(imx_phy->vbus_supply, true);
if (ret && ret != -ENOSYS) {
dev_err(dev, "Failed to enable VBUS regulator: %d\n", ret);
goto err;
}
}
/* Disable rx term override */
value = readl(imx_phy->base + PHY_CTRL6);
value &= ~PHY_CTRL6_RXTERM_OVERRIDE_SEL;
writel(value, imx_phy->base + PHY_CTRL6);
return 0;
err:
#if CONFIG_IS_ENABLED(CLK)
clk_disable(&imx_phy->phy_clk);
#endif
return ret;
}
static int imx8mq_usb_phy_power_off(struct phy *usb_phy)
@ -196,6 +213,7 @@ static int imx8mq_usb_phy_power_off(struct phy *usb_phy)
struct udevice *dev = usb_phy->dev;
struct imx8mq_usb_phy *imx_phy = dev_get_priv(dev);
u32 value;
int ret;
/* Override rx term to be 0 */
value = readl(imx_phy->base + PHY_CTRL6);
@ -206,6 +224,14 @@ static int imx8mq_usb_phy_power_off(struct phy *usb_phy)
clk_disable(&imx_phy->phy_clk);
#endif
if (CONFIG_IS_ENABLED(DM_REGULATOR) && imx_phy->vbus_supply) {
ret = regulator_set_enable_if_allowed(imx_phy->vbus_supply, false);
if (ret && ret != -ENOSYS) {
dev_err(dev, "Failed to disable VBUS regulator: %d\n", ret);
return ret;
}
}
return 0;
}
@ -224,6 +250,7 @@ struct phy_ops imx8mq_usb_phy_ops = {
int imx8mq_usb_phy_probe(struct udevice *dev)
{
struct imx8mq_usb_phy *priv = dev_get_priv(dev);
int ret;
priv->type = dev_get_driver_data(dev);
priv->base = dev_read_addr_ptr(dev);
@ -232,8 +259,6 @@ int imx8mq_usb_phy_probe(struct udevice *dev)
return -EINVAL;
#if CONFIG_IS_ENABLED(CLK)
int ret;
/* Assigned clock already set clock */
ret = clk_get_by_name(dev, "phy", &priv->phy_clk);
if (ret) {
@ -241,6 +266,14 @@ int imx8mq_usb_phy_probe(struct udevice *dev)
return ret;
}
#endif
if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
ret = device_get_supply_regulator(dev, "vbus-supply",
&priv->vbus_supply);
if (ret && ret != -ENOENT) {
dev_err(dev, "Failed to get VBUS regulator: %d\n", ret);
return ret;
}
}
return 0;
}