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authorHung-Te Lin <hungte@chromium.org>2013-09-24 15:51:05 +0800
committerIsaac Christensen <isaac.christensen@se-eng.com>2014-08-18 19:03:39 +0200
commit12b121f3fef61d6a346c2575266a9cb46bb9d31f (patch)
tree24d4024371da777582f76b5cec6448272859dc03 /src/cpu/samsung/exynos5250/wakeup.h
parent68aef1169239cc5d33fb36f05cd32d7e062b7743 (diff)
arm/exynos: Allow releasing UART retention for resume.
The UART / serial console is put in retention state by kernel during suspend / resume path, which caused Coreboot not able to print any messages during resume. Sending values to the padret_uart_opt inside PMU may release UART, but that may also cause unexpected output when kernel is back. However, it's still very helpful when we are debugging suspend/resume inside Coreboot. To get UART message on resume, call wakeup_enable_uart() in boot block or romstage (before console_init). Change-Id: Ib5759cb402c6e018d9dba14fad8b61f6a1b1a265 Reviewed-on: https://chromium-review.googlesource.com/170440 Tested-by: Hung-Te Lin <hungte@chromium.org> Reviewed-by: Hung-Te Lin <hungte@chromium.org> Commit-Queue: Hung-Te Lin <hungte@chromium.org> (cherry picked from commit 547fbbfe2eeb6da4e161f36be2caf8099f9eac9b) Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com> Reviewed-on: http://review.coreboot.org/6649 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/cpu/samsung/exynos5250/wakeup.h')
-rw-r--r--src/cpu/samsung/exynos5250/wakeup.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/cpu/samsung/exynos5250/wakeup.h b/src/cpu/samsung/exynos5250/wakeup.h
index d38b52f7ed..690c6a3262 100644
--- a/src/cpu/samsung/exynos5250/wakeup.h
+++ b/src/cpu/samsung/exynos5250/wakeup.h
@@ -38,5 +38,6 @@ enum {
int wakeup_need_reset(void);
int get_wakeup_state(void);
void wakeup(void);
+void wakeup_enable_uart(void);
#endif /* CPU_SAMSUNG_EXYNOS5250_WAKEUP_H */