mb/google/geralt: Init MT6359P only once in ramstage

The regulator MT6359P is needed by both firmware display and SD card.
To avoid duplicate initialization in ramstage, publicize init_pmif_arb()
as mt6359p_init_pmif_arb() and call it from mainboard_init(). This would
save 13 ms for boot time on Geralt.

BUG=b:244208960
TEST=test firmware display pass for BOE_TV110C9M_LL0 on Geralt.

Change-Id: I29498d186ba5665ae20e84985174fc10f8d4accd
Signed-off-by: Liju-Clr Chen <liju-clr.chen@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72839
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/soc/mediatek/common/include/soc/mt6359p.h b/src/soc/mediatek/common/include/soc/mt6359p.h
index 4bb62496aa..55a1a4d835 100644
--- a/src/soc/mediatek/common/include/soc/mt6359p.h
+++ b/src/soc/mediatek/common/include/soc/mt6359p.h
@@ -87,6 +87,7 @@ u32 mt6359p_get_vsim1_voltage(void);
 void mt6359p_enable_vpa(bool enable);
 void mt6359p_enable_vsim1(bool enable);
 void mt6359p_enable_vm18(bool enable);
+void mt6359p_init_pmif_arb(void);
 void mt6359p_write_field(u32 reg, u32 val, u32 mask, u32 shift);
 void pmic_init_setting(void);
 void pmic_lp_setting(void);