sunxi: Add INITIAL_USB_SCAN_DELAY Kconfig option
Some boards have on board usb devices which need longer than the USB
spec's 1 second to connect from board powerup. Add a config option which
when non 0 adds an extra delay before the first usb bus scan.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/arch/arm/mach-sunxi/usb_phy.c b/arch/arm/mach-sunxi/usb_phy.c
index b258ce4..f9993d2 100644
--- a/arch/arm/mach-sunxi/usb_phy.c
+++ b/arch/arm/mach-sunxi/usb_phy.c
@@ -85,6 +85,8 @@
#endif
};
+static int initial_usb_scan_delay = CONFIG_INITIAL_USB_SCAN_DELAY;
+
static int get_vbus_gpio(int index)
{
switch (index) {
@@ -269,6 +271,11 @@
{
struct sunxi_usb_phy *phy = &sunxi_usb_phy[index];
+ if (initial_usb_scan_delay) {
+ mdelay(initial_usb_scan_delay);
+ initial_usb_scan_delay = 0;
+ }
+
phy->power_on_count++;
if (phy->power_on_count != 1)
return;
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig
index 464fa0f..fa78720 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -312,6 +312,15 @@
slot or emmc on mmc1 - mmc3. Setting this to 1, 2 or 3 will enable
support for this.
+config INITIAL_USB_SCAN_DELAY
+ int "delay initial usb scan by x ms to allow builtin devices to init"
+ default 0
+ ---help---
+ Some boards have on board usb devices which need longer than the
+ USB spec's 1 second to connect from board powerup. Set this config
+ option to a non 0 value to add an extra delay before the first usb
+ bus scan.
+
config USB0_VBUS_PIN
string "Vbus enable pin for usb0 (otg)"
default ""