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authorTim Wawrzynczak <twawrzynczak@google.com>2019-12-25 19:14:30 +1100
committerPatrick Georgi <pgeorgi@google.com>2019-12-27 08:58:47 +0000
commit0d9fb55ae2e9e7d83bcfbcec70e5e3e1f58a62ca (patch)
tree7d114a459b90b7ead8ada023b61a90758ce6181b /src
parentf07d7dc2fdd71b3f8b5fd9cbde57068a98a9e602 (diff)
downloadcoreboot-0d9fb55ae2e9e7d83bcfbcec70e5e3e1f58a62ca.tar.xz
ec/google: Fix wedging AP on early ec sw sync
If the EC doesn't support the EARLY_EC_SYNC we don't properly set power limits to reasonable defaults and can wedge the AP by browning out at the end of vboot. BRANCH=none BUG=b:146165519 TEST=./util/abuild/abuild -p none -t google/hatch -x -a Change-Id: I4e683e5a1c5b453b3742a12a519cad9069e8b7f7 Signed-off-by: Edward O'Callaghan <quasisec@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37930 Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
-rw-r--r--src/ec/google/chromeec/ec.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/src/ec/google/chromeec/ec.c b/src/ec/google/chromeec/ec.c
index 5dff16252b..de43eb5b74 100644
--- a/src/ec/google/chromeec/ec.c
+++ b/src/ec/google/chromeec/ec.c
@@ -757,12 +757,17 @@ int google_chromeec_read_limit_power_request(int *limit_power)
.cmd_data_out = &resp,
.cmd_dev_index = 0,
};
+ int rv;
- if (google_chromeec_command(&cmd))
- return -1;
+ rv = google_chromeec_command(&cmd);
+ if (rv == -EC_RES_INVALID_PARAM || rv == -EC_RES_INVALID_COMMAND) {
+ printk(BIOS_INFO, "PARAM_LIMIT_POWER not supported by EC.\n");
+ *limit_power = 0;
+ return 0;
+ }
*limit_power = resp.get_param.value;
- return 0;
+ return rv;
}
int google_chromeec_get_protocol_info(