[coreboot-gerrit] Change in ...coreboot[master]: TEMP: NOT FOR REVIEW: google/mistral: Limit FDR detection for verstage

[Yuji Sasaki (Code Review)]

Yuji Sasaki has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/32904

Change subject: TEMP: NOT FOR REVIEW: google/mistral: Limit FDR detection for verstage
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TEMP: NOT FOR REVIEW: google/mistral: Limit FDR detection for verstage

FDR switch detection and LED state change must only be functional
when called in verstage. get_recovery_mode_switch() is called from
ramstage as part of elog function but this is informational
purpose, should not affecting LED state and boot mode.
This CL is adding #if directives to limit FDR detection for
verstage. When get_recovery_mode_switch() is called from other
stages, it just return current FDR switch state but do not change
LED state or boot mode.

BUG=b:131622855
TEST=Build and run on DUT, keep pushing FDR switch and power on,
verify it do not fall into secondary FDR detection loop in ramstage
after "recovery requested" in verstage.
Signed-off-by: Yuji Sasaki

Change-Id: Ib034acca2bcf39728e58b468e69e74620b086a10
---
M src/mainboard/google/mistral/chromeos.c
1 file changed, 19 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/04/32904/1

diff --git a/src/mainboard/google/mistral/chromeos.c b/src/mainboard/google/mistral/chromeos.c
index f220151..8873edd 100644
--- a/src/mainboard/google/mistral/chromeos.c
+++ b/src/mainboard/google/mistral/chromeos.c
@@ -67,6 +67,11 @@
    wipeout_req
 };

+/*
+ * FDR switch detection and LED state change is only functional
+ * when called in verstage.
+ */
+#if defined(__VERSTAGE__)
 static void display_pattern(int pattern)
 {
    led_lp5562_display_pattern(BLSP_QUP_ID_1, pattern);
@@ -130,6 +135,20 @@
    return saved_state;
 }

+/*
+ * get_recovery_mode_switch is called from ramstage as part of
+ * elog function, but this is informational purpose to show current
+ * FDR switch state, should not affecting LED and boot mode.
+ */
+#else // defined(__VERSTAGE)
+static enum switch_state get_rec_sw_state(void)
+{
+	gpio_t rec_sw = GPIO_REC_STATE;
+	int sampled_value = !gpio_get(rec_sw);
+	return sampled_value ? recovery_req : no_req;
+}
+#endif // defined(__VERSTAGE)
+
 int get_recovery_mode_switch(void)
 {
    return get_rec_sw_state() == recovery_req;