Commit 7a84e735 authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Greg Kroah-Hartman

Revert "usb: dwc3: Don't switch OTG -> peripheral if extcon is present"

This reverts commit 0f010171.

As pointed out by Ferry this breaks Dual Role support on
Intel Merrifield platforms.

Fixes: 0f010171 ("usb: dwc3: Don't switch OTG -> peripheral if extcon is present")
Reported-by: default avatarFerry Toth <fntoth@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Ferry Toth <fntoth@gmail.com> # for Merrifield
Reviewed-by: default avatarSven Peter <sven@svenpeter.dev>
Link: https://lore.kernel.org/r/20220927155332.10762-3-andriy.shevchenko@linux.intel.comSigned-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2adc960c
...@@ -23,7 +23,6 @@ ...@@ -23,7 +23,6 @@
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/acpi.h> #include <linux/acpi.h>
#include <linux/pinctrl/consumer.h> #include <linux/pinctrl/consumer.h>
#include <linux/reset.h> #include <linux/reset.h>
...@@ -86,7 +85,7 @@ static int dwc3_get_dr_mode(struct dwc3 *dwc) ...@@ -86,7 +85,7 @@ static int dwc3_get_dr_mode(struct dwc3 *dwc)
* mode. If the controller supports DRD but the dr_mode is not * mode. If the controller supports DRD but the dr_mode is not
* specified or set to OTG, then set the mode to peripheral. * specified or set to OTG, then set the mode to peripheral.
*/ */
if (mode == USB_DR_MODE_OTG && !dwc->edev && if (mode == USB_DR_MODE_OTG &&
(!IS_ENABLED(CONFIG_USB_ROLE_SWITCH) || (!IS_ENABLED(CONFIG_USB_ROLE_SWITCH) ||
!device_property_read_bool(dwc->dev, "usb-role-switch")) && !device_property_read_bool(dwc->dev, "usb-role-switch")) &&
!DWC3_VER_IS_PRIOR(DWC3, 330A)) !DWC3_VER_IS_PRIOR(DWC3, 330A))
...@@ -1691,51 +1690,6 @@ static void dwc3_check_params(struct dwc3 *dwc) ...@@ -1691,51 +1690,6 @@ static void dwc3_check_params(struct dwc3 *dwc)
} }
} }
static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
{
struct device *dev = dwc->dev;
struct device_node *np_phy;
struct extcon_dev *edev = NULL;
const char *name;
if (device_property_read_bool(dev, "extcon"))
return extcon_get_edev_by_phandle(dev, 0);
/*
* Device tree platforms should get extcon via phandle.
* On ACPI platforms, we get the name from a device property.
* This device property is for kernel internal use only and
* is expected to be set by the glue code.
*/
if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) {
edev = extcon_get_extcon_dev(name);
if (!edev)
return ERR_PTR(-EPROBE_DEFER);
return edev;
}
/*
* Try to get an extcon device from the USB PHY controller's "port"
* node. Check if it has the "port" node first, to avoid printing the
* error message from underlying code, as it's a valid case: extcon
* device (and "port" node) may be missing in case of "usb-role-switch"
* or OTG mode.
*/
np_phy = of_parse_phandle(dev->of_node, "phys", 0);
if (of_graph_is_present(np_phy)) {
struct device_node *np_conn;
np_conn = of_graph_get_remote_node(np_phy, -1, -1);
if (np_conn)
edev = extcon_find_edev_by_node(np_conn);
of_node_put(np_conn);
}
of_node_put(np_phy);
return edev;
}
static int dwc3_probe(struct platform_device *pdev) static int dwc3_probe(struct platform_device *pdev)
{ {
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
...@@ -1886,13 +1840,6 @@ static int dwc3_probe(struct platform_device *pdev) ...@@ -1886,13 +1840,6 @@ static int dwc3_probe(struct platform_device *pdev)
goto err2; goto err2;
} }
dwc->edev = dwc3_get_extcon(dwc);
if (IS_ERR(dwc->edev)) {
ret = PTR_ERR(dwc->edev);
dev_err_probe(dwc->dev, ret, "failed to get extcon\n");
goto err3;
}
ret = dwc3_get_dr_mode(dwc); ret = dwc3_get_dr_mode(dwc);
if (ret) if (ret)
goto err3; goto err3;
......
...@@ -8,6 +8,7 @@ ...@@ -8,6 +8,7 @@
*/ */
#include <linux/extcon.h> #include <linux/extcon.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h> #include <linux/of_platform.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/property.h> #include <linux/property.h>
...@@ -438,6 +439,51 @@ static int dwc3_drd_notifier(struct notifier_block *nb, ...@@ -438,6 +439,51 @@ static int dwc3_drd_notifier(struct notifier_block *nb,
return NOTIFY_DONE; return NOTIFY_DONE;
} }
static struct extcon_dev *dwc3_get_extcon(struct dwc3 *dwc)
{
struct device *dev = dwc->dev;
struct device_node *np_phy;
struct extcon_dev *edev = NULL;
const char *name;
if (device_property_read_bool(dev, "extcon"))
return extcon_get_edev_by_phandle(dev, 0);
/*
* Device tree platforms should get extcon via phandle.
* On ACPI platforms, we get the name from a device property.
* This device property is for kernel internal use only and
* is expected to be set by the glue code.
*/
if (device_property_read_string(dev, "linux,extcon-name", &name) == 0) {
edev = extcon_get_extcon_dev(name);
if (!edev)
return ERR_PTR(-EPROBE_DEFER);
return edev;
}
/*
* Try to get an extcon device from the USB PHY controller's "port"
* node. Check if it has the "port" node first, to avoid printing the
* error message from underlying code, as it's a valid case: extcon
* device (and "port" node) may be missing in case of "usb-role-switch"
* or OTG mode.
*/
np_phy = of_parse_phandle(dev->of_node, "phys", 0);
if (of_graph_is_present(np_phy)) {
struct device_node *np_conn;
np_conn = of_graph_get_remote_node(np_phy, -1, -1);
if (np_conn)
edev = extcon_find_edev_by_node(np_conn);
of_node_put(np_conn);
}
of_node_put(np_phy);
return edev;
}
#if IS_ENABLED(CONFIG_USB_ROLE_SWITCH) #if IS_ENABLED(CONFIG_USB_ROLE_SWITCH)
#define ROLE_SWITCH 1 #define ROLE_SWITCH 1
static int dwc3_usb_role_switch_set(struct usb_role_switch *sw, static int dwc3_usb_role_switch_set(struct usb_role_switch *sw,
...@@ -542,6 +588,10 @@ int dwc3_drd_init(struct dwc3 *dwc) ...@@ -542,6 +588,10 @@ int dwc3_drd_init(struct dwc3 *dwc)
device_property_read_bool(dwc->dev, "usb-role-switch")) device_property_read_bool(dwc->dev, "usb-role-switch"))
return dwc3_setup_role_switch(dwc); return dwc3_setup_role_switch(dwc);
dwc->edev = dwc3_get_extcon(dwc);
if (IS_ERR(dwc->edev))
return PTR_ERR(dwc->edev);
if (dwc->edev) { if (dwc->edev) {
dwc->edev_nb.notifier_call = dwc3_drd_notifier; dwc->edev_nb.notifier_call = dwc3_drd_notifier;
ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST, ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST,
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment