diff options
| author | Rex-BC Chen <rex-bc.chen@mediatek.com> | 2022-08-16 11:04:49 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-09-14 11:56:27 +0000 |
| commit | 5f9395cbc10ff9db406f0eae77a7d585e1c73b7c (patch) | |
| tree | 5aa715dab290ce383a929f13cc71f318c3be69c7 /src/mainboard/google | |
| parent | d9b1dfe96806bd1985c722fd52f7dbf83a960f0f (diff) | |
mb/google/geralt: Raise little core CPU frequency from 500MHz to 2GHz
To improve boot time, raise little CPU from 500MHz to 2GHz at romstage
(before DRAM calibration).
FW logs:
Check CPU freq: 1999968 KHz, cci: 1600012 KHz
TEST=cpu freq and cci freq run correctly.
BUG=b:244251006
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Change-Id: Ic1bed53669baa15f797c9a952455376a39d29cf3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67544
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google')
| -rw-r--r-- | src/mainboard/google/geralt/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/mainboard/google/geralt/romstage.c | 18 |
2 files changed, 19 insertions, 0 deletions
diff --git a/src/mainboard/google/geralt/Makefile.inc b/src/mainboard/google/geralt/Makefile.inc index 717ba16688..8da2ecf156 100644 --- a/src/mainboard/google/geralt/Makefile.inc +++ b/src/mainboard/google/geralt/Makefile.inc @@ -8,6 +8,7 @@ verstage-y += reset.c romstage-y += memlayout.ld romstage-y += chromeos.c +romstage-y += regulator.c romstage-y += romstage.c romstage-y += sdram_configs.c diff --git a/src/mainboard/google/geralt/romstage.c b/src/mainboard/google/geralt/romstage.c index 8f248ca8a6..1265640dbb 100644 --- a/src/mainboard/google/geralt/romstage.c +++ b/src/mainboard/google/geralt/romstage.c @@ -1,18 +1,36 @@ /* SPDX-License-Identifier: GPL-2.0-only */ #include <arch/stages.h> +#include <console/console.h> +#include <delay.h> #include <soc/clkbuf.h> #include <soc/emi.h> #include <soc/mt6315.h> #include <soc/mt6359p.h> +#include <soc/pll_common.h> #include <soc/pmif.h> +#include <soc/regulator.h> #include <soc/rtc.h> +static void raise_little_cpu_freq(void) +{ + mainboard_set_regulator_voltage(MTK_REGULATOR_VPROC11, 900000); + mainboard_set_regulator_voltage(MTK_REGULATOR_VSRAM_PROC11, 1000000); + udelay(200); + mt_pll_raise_little_cpu_freq(2000 * MHz); + mt_pll_raise_cci_freq(1600 * MHz); + + printk(BIOS_INFO, "Check CPU freq: %u KHz, cci: %u KHz\n", + mt_fmeter_get_freq_khz(FMETER_ABIST, 1), + mt_fmeter_get_freq_khz(FMETER_ABIST, 3)); +} + void platform_romstage_main(void) { mtk_pmif_init(); mt6315_init(); mt6359p_init(); + raise_little_cpu_freq(); clk_buf_init(); rtc_boot(); mtk_dram_init(); |