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authorRaul E Rangel <rrangel@chromium.org>2021-03-30 14:00:24 -0600
committerMartin Roth <martinroth@google.com>2021-03-31 21:14:13 +0000
commit6ef0e80bf42909bf0a6609041953b8b23f68e7f3 (patch)
treedd411c69770bcee7058b3e389456c0b9b85553dd /src/mainboard/google
parenta7659ebe4e1101a7a2cbe1f156943e83e9f59249 (diff)
mb/google/guybrush: Switch eSPI to 16 MHz
It looks like we are having SI issues on eSPI at 33 MHz. Switching to 16 MHz makes everything a lot more stable. BUG=b:183524609 TEST=Boot to OS and run `ectool version` 1000 times and see no problems. Before with 33 MHz there was an error every few cycles. declare -i i=0; while ectool version; do i+=1; echo "$i"; sleep .11; done; echo "Finished: $i" Signed-off-by: Raul E Rangel <rrangel@chromium.org> Change-Id: I6ab515629703a157c1d1ac6adcf5cf379e80f8ee Reviewed-on: https://review.coreboot.org/c/coreboot/+/51953 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Felix Held <felix-coreboot@felixheld.de> Reviewed-by: Mathew King <mathewk@chromium.org> Reviewed-by: Rob Barnes <robbarnes@google.com>
Diffstat (limited to 'src/mainboard/google')
-rw-r--r--src/mainboard/google/guybrush/variants/baseboard/devicetree.cb2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb b/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
index 4d57b52810..b90ea0bafc 100644
--- a/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/guybrush/variants/baseboard/devicetree.cb
@@ -27,7 +27,7 @@ chip soc/amd/cezanne
},
.io_mode = ESPI_IO_MODE_QUAD,
- .op_freq_mhz = ESPI_OP_FREQ_33_MHZ,
+ .op_freq_mhz = ESPI_OP_FREQ_16_MHZ,
.crc_check_enable = 1,
.dedicated_alert_pin = 1,
.periph_ch_en = 1,