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63 lines
1.7 KiB
Diff
63 lines
1.7 KiB
Diff
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From ff2e0f074f61fded30a44e13b849fe9010ab4148 Mon Sep 17 00:00:00 2001
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From: Andy Green <andy@openmoko.com>
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Date: Fri, 25 Jul 2008 23:06:16 +0100
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Subject: [PATCH] introduce-panic-blink-led-not-using-userspace-omfg.patch
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A panic is silent on GTA02, it would be good if we got a little hint
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if we are crashing (eg, in suspend / resume) from a panic instead of
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a deadlock, etc. On a normal PC i8042 blinks the keyboard lights if
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we panic, this patch causes AUX to flash at 5Hz in event of a panic.
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Tested by giving kernel fake root= that didn't exist.
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Signed-off-by: Andy Green <andy@openmoko.com>
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---
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arch/arm/mach-s3c2440/mach-gta02.c | 24 ++++++++++++++++++++++++
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1 files changed, 24 insertions(+), 0 deletions(-)
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diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
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index fd746fd..c32bb2a 100644
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--- a/arch/arm/mach-s3c2440/mach-gta02.c
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+++ b/arch/arm/mach-s3c2440/mach-gta02.c
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@@ -328,6 +328,27 @@ FIQ_HANDLER_ENTRY(256, 512)
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FIQ_HANDLER_END()
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+/*
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+ * this gets called every 1ms when we paniced.
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+ */
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+
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+static long gta02_panic_blink(long count)
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+{
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+ long delay = 0;
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+ static long last_blink;
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+ static char led;
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+
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+ if (count - last_blink < 100) /* 200ms period, fast blink */
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+ return 0;
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+
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+ led ^= 1;
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+ s3c2410_gpio_cfgpin(GTA02_GPIO_AUX_LED, S3C2410_GPIO_OUTPUT);
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+ neo1973_gpb_setpin(GTA02_GPIO_AUX_LED, led);
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+
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+ last_blink = count;
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+ return delay;
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+}
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+
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/**
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* returns PCB revision information in b9,b8 and b2,b1,b0
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@@ -1476,6 +1497,9 @@ static void __init gta02_machine_init(void)
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{
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int rc;
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+ /* set the panic callback to make AUX blink fast */
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+ panic_blink = gta02_panic_blink;
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+
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switch (system_rev) {
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case GTA02v6_SYSTEM_REV:
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/* we need push-pull interrupt from motion sensors */
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--
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1.5.6.3
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