[coreboot-gerrit] [S] Change in coreboot[master]: mb/google/geralt: Raise little CPU frequency

[Rex-BC Chen (Code Review)]

Rex-BC Chen has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/67544 )

Change subject: mb/google/geralt: Raise little CPU frequency
......................................................................

mb/google/geralt: Raise little CPU frequency

Raise little CPU to 2GHz at romstage.

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 
Change-Id: Ic1bed53669baa15f797c9a952455376a39d29cf3
---
M src/mainboard/google/geralt/Makefile.inc
M src/mainboard/google/geralt/romstage.c
2 files changed, 37 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/44/67544/1

diff --git a/src/mainboard/google/geralt/Makefile.inc b/src/mainboard/google/geralt/Makefile.inc
index 717ba16..8da2ecf 100644
--- a/src/mainboard/google/geralt/Makefile.inc
+++ b/src/mainboard/google/geralt/Makefile.inc
@@ -8,6 +8,7 @@

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 8f248ca..1265640 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();