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mb/google/rauru: Raise little core CPU frequency from 700MHz to 2.4GHz

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To improve boot time, raise little CPU from 700MHz to 2.4GHz at romstage
(before DRAM calibration).

FW logs:
Check CPU freq: 2400120 KHz

BUG=b:317009620
TEST=Build pass, boot ok.

Change-Id: I14a31f3a51ca246b842cc0ef740c43ff5d857310
Signed-off-by: Jarried Lin <jarried.lin@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/85773
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
This commit is contained in:
Jarried Lin 2024-12-26 14:23:13 +08:00 • committed by Yidi Lin
commit f2ad73b5d1
1 changed files with 10 additions and 0 deletions
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10
src/mainboard/google/rauru/romstage.c
View file

@ -9,8 +9,17 @@
#include <soc/mt6685.h>
#include <soc/mtk_pwrsel.h>
#include <soc/pcie.h>
#include <soc/pll.h>
#include <soc/pmif.h>
static void raise_little_cpu_freq(void)
{
mt6316_buck_set_voltage(SPMI_SLAVE_8, MT6316_BUCK_3, 1050000);
printk(BIOS_INFO, "%s: little core voltage: %d\n",
__func__, mt6316_buck_get_voltage(SPMI_SLAVE_8, MT6316_BUCK_3));
mt_pll_raise_little_cpu_freq(2400U * MHz);
}
void platform_romstage_main(void)
{
irq2axi_disable();
@ -20,6 +29,7 @@ void platform_romstage_main(void)
mt6363_enable_vtref18(true);
mt6363_set_vtref18_voltage(1800000);
mt6316_init();
raise_little_cpu_freq();
mt6373_init();
mt6685_init();
mtk_dram_init();