From: Tim Harvey tharvey@gateworks.com
There is no need to set and/or detect mode in of_to_plat and accessing phy registers at that point before device power domain and clock are enabled will cause hangs on platforms such as IMX8M Mini.
Move the mode set/detect from of_to_plat into the probe and remove the unnecessary of_to_plat.
Signed-off-by: Tim Harvey tharvey@gateworks.com Signed-off-by: Fabio Estevam festevam@denx.de --- drivers/usb/host/ehci-mx6.c | 42 ++++++++++++++----------------------- 1 file changed, 16 insertions(+), 26 deletions(-)
diff --git a/drivers/usb/host/ehci-mx6.c b/drivers/usb/host/ehci-mx6.c index c3e4170513ec..ff23a5e35e64 100644 --- a/drivers/usb/host/ehci-mx6.c +++ b/drivers/usb/host/ehci-mx6.c @@ -539,28 +539,6 @@ static int ehci_usb_phy_mode(struct udevice *dev) return 0; }
-static int ehci_usb_of_to_plat(struct udevice *dev) -{ - struct usb_plat *plat = dev_get_plat(dev); - enum usb_dr_mode dr_mode; - - dr_mode = usb_get_dr_mode(dev_ofnode(dev)); - - switch (dr_mode) { - case USB_DR_MODE_HOST: - plat->init_type = USB_INIT_HOST; - break; - case USB_DR_MODE_PERIPHERAL: - plat->init_type = USB_INIT_DEVICE; - break; - case USB_DR_MODE_OTG: - case USB_DR_MODE_UNKNOWN: - return ehci_usb_phy_mode(dev); - }; - - return 0; -} - static int mx6_parse_dt_addrs(struct udevice *dev) { #if !defined(CONFIG_PHY) @@ -622,7 +600,6 @@ static int ehci_usb_probe(struct udevice *dev) struct usb_plat *plat = dev_get_plat(dev); struct usb_ehci *ehci = dev_read_addr_ptr(dev); struct ehci_mx6_priv_data *priv = dev_get_priv(dev); - enum usb_init_type type = plat->init_type; struct ehci_hccr *hccr; struct ehci_hcor *hcor; int ret; @@ -640,7 +617,6 @@ static int ehci_usb_probe(struct udevice *dev) return ret;
priv->ehci = ehci; - priv->init_type = type;
#if CONFIG_IS_ENABLED(CLK) ret = clk_get_by_index(dev, 0, &priv->clk); @@ -656,6 +632,21 @@ static int ehci_usb_probe(struct udevice *dev) mdelay(1); #endif
+ switch (usb_get_dr_mode(dev_ofnode(dev))) { + case USB_DR_MODE_HOST: + plat->init_type = USB_INIT_HOST; + break; + case USB_DR_MODE_PERIPHERAL: + plat->init_type = USB_INIT_DEVICE; + break; + case USB_DR_MODE_OTG: + case USB_DR_MODE_UNKNOWN: + ret = ehci_usb_phy_mode(dev); + if (ret) + return ret; + }; + priv->init_type = plat->init_type; + #if CONFIG_IS_ENABLED(DM_REGULATOR) ret = device_get_supply_regulator(dev, "vbus-supply", &priv->vbus_supply); @@ -679,7 +670,7 @@ static int ehci_usb_probe(struct udevice *dev) #if CONFIG_IS_ENABLED(DM_REGULATOR) if (priv->vbus_supply) { ret = regulator_set_enable(priv->vbus_supply, - (type == USB_INIT_DEVICE) ? + (priv->init_type == USB_INIT_DEVICE) ? false : true); if (ret && ret != -ENOSYS) { printf("Error enabling VBUS supply (ret=%i)\n", ret); @@ -764,7 +755,6 @@ U_BOOT_DRIVER(usb_mx6) = { .name = "ehci_mx6", .id = UCLASS_USB, .of_match = mx6_usb_ids, - .of_to_plat = ehci_usb_of_to_plat, .probe = ehci_usb_probe, .remove = ehci_usb_remove, .ops = &ehci_usb_ops,