Change in coreboot[master]: mb/google/corsola: Raise little CPU frequency

[Rex-BC Chen (Code Review)]

Attention is currently required from: Hung-Te Lin.
Rex-BC Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/59569 )

Change subject: mb/google/corsola: Raise little CPU frequency
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mb/google/corsola: Raise little CPU frequency

Raise little CPU to 2GHz at romstage.

TEST=check little core cpu frequency is 2GHz
BUG=b:202871018

Signed-off-by: Rex-BC Chen 
Change-Id: If4c983d15beb2b588230f3db7416cb767b29978d
---
M src/mainboard/google/corsola/romstage.c
M src/soc/mediatek/mt8186/Makefile.inc
2 files changed, 19 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/69/59569/1

diff --git a/src/mainboard/google/corsola/romstage.c b/src/mainboard/google/corsola/romstage.c
index d1e9e20..aff496b 100644
--- a/src/mainboard/google/corsola/romstage.c
+++ b/src/mainboard/google/corsola/romstage.c
@@ -1,11 +1,29 @@
 /* SPDX-License-Identifier: GPL-2.0-only */

#include <arch/stages.h>
+#include <console/console.h>
+#include <delay.h>
 #include <soc/mt6366.h>
+#include <soc/pll_common.h>
+#include <soc/regulator.h>
 #include <soc/rtc.h>

+static void raise_little_cpu_freq(void)
+{
+	mainboard_set_regulator_vol(MTK_REGULATOR_VPROC12, 1031250);
+	mainboard_set_regulator_vol(MTK_REGULATOR_VSRAM_PROC12, 1118750);
+	udelay(200);
+	mt_pll_raise_little_cpu_freq(2000 * MHz);
+	mt_pll_raise_cci_freq(1385 * MHz);
+
+	printk(BIOS_INFO, "Check CPU freq: %u KHz, cci: %u KHz\n",
+	       mt_fmeter_get_freq_khz(FMETER_ABIST, 9),
+	       mt_fmeter_get_freq_khz(FMETER_ABIST, 7));
+}
+
 void platform_romstage_main(void)
 {
    mt6366_init();
+	raise_little_cpu_freq();
    rtc_boot();
 }
diff --git a/src/soc/mediatek/mt8186/Makefile.inc b/src/soc/mediatek/mt8186/Makefile.inc
index b1624a3..fbde650 100644
--- a/src/soc/mediatek/mt8186/Makefile.inc
+++ b/src/soc/mediatek/mt8186/Makefile.inc
@@ -30,6 +30,7 @@
 romstage-y += ../common/gpio.c gpio.c
 romstage-y += ../common/i2c.c i2c.c
 romstage-y += ../common/mmu_operations.c ../common/mmu_cmops.c
+romstage-y += ../common/pll.c pll.c
 romstage-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
 romstage-y += ../common/timer.c timer.c
 romstage-y += ../common/uart.c