Add support for enabling and disabling vbus-supply regulator found
on several imx8mp boards in the usb3_phy0 and usb3_phy1 nodes.
While we are at it replace '#if CONFIG_IS_ENABLED(CLK)' with
'if (CONFIG_IS_ENABLED(CLK))' as a cleanup.
Signed-off-by: Tim Harvey <thar...@gateworks.com>
Reviewed-by: Adam Ford <aford...@gmail.com>
Reviewed-by: Marek Vasut <ma...@denx.de>
---
v5:
- remove #if CONFIG_IS_ENABLED around struct members
(you can not conditionally include if using if (CONFIG_IS_ENABLED(foo)) )
- replace clk '#if CONFIG_IS_ENABLED(CLK)' with 'if (CONFIG_IS_ENABLED(CLK))'
v4:
- use regulator_set_enable_if_allowed to handle regulator reference
counting
errors
- added Marek's rb tag
v3:
- change pr_err to dev_err
- add #if CONFIG_IS_ENABLED around vbus_supply in struct
- add fail path to disable clock if regulator enable failed
v2:
- protect ret with __maybe_unused in case CONFIG_CLK and
CONFIG_DM_REGULATOR not defined
- add error prints on failures
- add Adam's rb tag
---
drivers/phy/phy-imx8mq-usb.c | 68 +++++++++++++++++++++++++-----------
1 file changed, 48 insertions(+), 20 deletions(-)
diff --git a/drivers/phy/phy-imx8mq-usb.c b/drivers/phy/phy-imx8mq-usb.c
index 69f01de55538..532b0235e2bc 100644
--- a/drivers/phy/phy-imx8mq-usb.c
+++ b/drivers/phy/phy-imx8mq-usb.c
@@ -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)
@@ -76,11 +78,10 @@ enum imx8mpq_phy_type {
};
struct imx8mq_usb_phy {
-#if CONFIG_IS_ENABLED(CLK)
struct clk phy_clk;
-#endif
void __iomem *base;
enum imx8mpq_phy_type type;
+ struct udevice *vbus_supply;
};
static const struct udevice_id imx8mq_usb_phy_of_match[] = {
@@ -172,16 +173,24 @@ 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);
+ int ret;
u32 value;
-#if CONFIG_IS_ENABLED(CLK)
- int ret;
- ret = clk_enable(&imx_phy->phy_clk);
- if (ret) {
- printf("Failed to enable usb phy clock\n");
- return ret;
+ if (CONFIG_IS_ENABLED(CLK)) {
+ ret = clk_enable(&imx_phy->phy_clk);
+ if (ret) {
+ printf("Failed to enable usb phy clock\n");
+ return ret;
+ }
+ }
+
+ 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;
+ }
}
-#endif
/* Disable rx term override */
value = readl(imx_phy->base + PHY_CTRL6);
@@ -189,12 +198,17 @@ static int imx8mq_usb_phy_power_on(struct phy *usb_phy)
writel(value, imx_phy->base + PHY_CTRL6);
return 0;
+
+err:
+ clk_disable(&imx_phy->phy_clk);
+ return ret;
}
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);
+ int ret;
u32 value;
/* Override rx term to be 0 */
@@ -202,9 +216,16 @@ static int imx8mq_usb_phy_power_off(struct phy *usb_phy)
value |= PHY_CTRL6_RXTERM_OVERRIDE_SEL;
writel(value, imx_phy->base + PHY_CTRL6);
-#if CONFIG_IS_ENABLED(CLK)
- clk_disable(&imx_phy->phy_clk);
-#endif
+ if (CONFIG_IS_ENABLED(CLK))
+ clk_disable(&imx_phy->phy_clk);
+
+ 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 +245,7 @@ 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);
@@ -231,16 +253,22 @@ int imx8mq_usb_phy_probe(struct udevice *dev)
if (!priv->base)
return -EINVAL;
-#if CONFIG_IS_ENABLED(CLK)
- int ret;
+ if (CONFIG_IS_ENABLED(CLK)) {
+ ret = clk_get_by_name(dev, "phy", &priv->phy_clk);
+ if (ret) {
+ printf("Failed to get usb phy clock\n");
+ return ret;
+ }
+ }
- /* Assigned clock already set clock */
- ret = clk_get_by_name(dev, "phy", &priv->phy_clk);
- if (ret) {
- printf("Failed to get usb phy clock\n");
- return ret;
+ 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;
+ }
}
-#endif
return 0;
}
--
2.25.1
