[U-Boot] [PATCH v3 4/8] arm: bootm: call udc_disable() before booting linux

[Mike Dunn]

On the pxa270, 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 at newsguy.com>
---
Changelog:
  v3: no change
  v2: no change

Arguably, this is a bug in the linux driver, but it seemed pretty simple and
benign to just disable it in u-boot.  I'll also send a patch to upstream kernel
to fix its driver.

 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