From c10af299aeed2a7d530fbabbaa55947d64712333 Mon Sep 17 00:00:00 2001 From: Hsin-Hsiung Wang Date: Tue, 26 Mar 2019 15:38:04 +0800 Subject: mediatek/mt8183: Calibrate vsim2 to 2.7 V The default voltage of vsim2 is set to 2.76V for sim card usage. In general, 2.76V of vsim2 is composed of 2.7V main voltage and 0.06V calibration voltage. However, vsim2 is used for the tx_ovdd power of display port IT6505 on the kukui board design which needs 2.7V. So we set it to 2.7V with modifying calibration value. BUG=b:126139364 BRANCH=none TEST=measure vsim2 voltage with multimeter Change-Id: I4dffdde89cbde91286d92e6c2b445f0b3d0ad2fe Signed-off-by: Hsin-Hsiung Wang Reviewed-on: https://review.coreboot.org/c/coreboot/+/32057 Tested-by: build bot (Jenkins) Reviewed-by: Julius Werner --- src/mainboard/google/kukui/romstage.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'src/mainboard/google/kukui/romstage.c') diff --git a/src/mainboard/google/kukui/romstage.c b/src/mainboard/google/kukui/romstage.c index baaca43b90..1465243f07 100644 --- a/src/mainboard/google/kukui/romstage.c +++ b/src/mainboard/google/kukui/romstage.c @@ -29,6 +29,8 @@ void platform_romstage_main(void) mainboard_early_init(); mt6358_init(); + /* Adjust VSIM2 down to 2.7V because it is shared with IT6505. */ + pmic_set_vsim2_cali(2700); mt_pll_raise_ca53_freq(1989 * MHz); rtc_boot(); mt_mem_init(get_sdram_config()); -- cgit v1.2.3