From ef5c235541a630fd5e6ab90c3913db55313e64d2 Mon Sep 17 00:00:00 2001 From: Yidi Lin Date: Tue, 26 Jan 2021 21:31:56 +0800 Subject: mb/google/asurada: Improve boot time by raising little CPU frequency Raise little CPU to 2GHz at romstage to improve boot time. BUG=b:177389446 TEST=observe boot time by `cbmem` Before: 1,062,359 us After: 907,458 us Signed-off-by: Yidi Lin Change-Id: I723a916d7f708627525ef11e3c5ea0b381f269aa Reviewed-on: https://review.coreboot.org/c/coreboot/+/49935 Tested-by: build bot (Jenkins) Reviewed-by: Yu-Ping Wu --- src/mainboard/google/asurada/romstage.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'src/mainboard/google') diff --git a/src/mainboard/google/asurada/romstage.c b/src/mainboard/google/asurada/romstage.c index 47c1fb2268..67b43e227a 100644 --- a/src/mainboard/google/asurada/romstage.c +++ b/src/mainboard/google/asurada/romstage.c @@ -2,11 +2,14 @@ #include #include +#include #include #include #include #include +#include #include +#include /* This must be defined in chromeos.fmd in same name and size. */ #define CALIBRATION_REGION "RW_DDR_TRAINING" @@ -42,9 +45,20 @@ static struct dramc_param_ops dparam_ops = { .write_to_flash = &write_calibration_data_to_flash, }; +static void raise_little_cpu_freq(void) +{ + mt6359p_buck_set_voltage(MT6359P_SRAM_PROC2, 1000 * 1000); + mt6315_buck_set_voltage(MT6315_CPU, MT6315_BUCK_3, 925 * 1000); + udelay(200); + mt_pll_raise_little_cpu_freq(2000 * MHz); + mt_pll_raise_cci_freq(1400 * MHz); +} + void platform_romstage_main(void) { mt6359p_romstage_init(); + mt6315_romstage_init(); + raise_little_cpu_freq(); mt_mem_init(&dparam_ops); mtk_mmu_after_dram(); } -- cgit v1.2.3