[U-Boot] [PATCH 5/8] arm: bootm: call udc_disable() before booting linux

Mike Dunn
2013-04-07T16:41:02Z

On the pxa270 (at least), if the udc device is not disabled before jumping to
linux, the device fails to initialize in linux because it was left in a running
state, and the linux driver assumes that it is in a disabled state.

Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
---

Arguably, this is a bug in the linux driver, but it seemed pretty simple and
benign to just disable it in u-boot.

arch/arm/include/asm/bootm.h | 1 +
arch/arm/lib/bootm.c | 1 +
2 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/arm/include/asm/bootm.h b/arch/arm/include/asm/bootm.h
index db2ff94..68189cc 100644
--- a/arch/arm/include/asm/bootm.h
+++ b/arch/arm/include/asm/bootm.h
@@ -21,6 +21,7 @@

#ifdef CONFIG_USB_DEVICE
extern void udc_disconnect(void);
+extern void udc_disable(void);
#endif

#endif
diff --git a/arch/arm/lib/bootm.c b/arch/arm/lib/bootm.c
index f3b30c5..6daa7bf 100644
--- a/arch/arm/lib/bootm.c
+++ b/arch/arm/lib/bootm.c
@@ -105,6 +105,7 @@ static void announce_and_cleanup(void)

#ifdef CONFIG_USB_DEVICE
udc_disconnect();
+ udc_disable();
#endif
cleanup_before_linux();
}
--
1.7.8.6