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 <miked...@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. 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
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