4 files changed, 34 insertions, 19 deletions

diff --git a/src/mainboard/google/gru/bootblock.c b/src/mainboard/google/gru/bootblock.c
index 0e916d298d..d76ec8baf8 100644
--- a/src/mainboard/google/gru/bootblock.c
+++ b/src/mainboard/google/gru/bootblock.c
@@ -117,7 +117,7 @@ static void speed_up_boot_cpu(void)
 
 	udelay(200);
 
-	rkclk_configure_cpu(APLL_1512_MHZ, false);
+	rkclk_configure_cpu(APLL_1512_MHZ, CPU_CLUSTER_LITTLE);
 }
 
 void bootblock_mainboard_init(void)
diff --git a/src/soc/rockchip/rk3399/clock.c b/src/soc/rockchip/rk3399/clock.c
index 9ac1ffedff..ded0a94008 100644
--- a/src/soc/rockchip/rk3399/clock.c
+++ b/src/soc/rockchip/rk3399/clock.c
@@ -494,26 +494,32 @@ void rkclk_init(void)
 						HCLK_PERILP1_PLL_SEL_SHIFT));
 }
 
-void rkclk_configure_cpu(enum apll_frequencies apll_freq, bool is_big)
+void rkclk_configure_cpu(enum apll_frequencies freq, enum cpu_cluster cluster)
 {
-	u32 aclkm_div;
-	u32 pclk_dbg_div;
-	u32 atclk_div;
-	u32 apll_l_hz;
-	int con_base = is_big ? 2 : 0;
-	int parent = is_big ? CLK_CORE_PLL_SEL_ABPLL : CLK_CORE_PLL_SEL_ALPLL;
-	u32 *pll_con = is_big ? &cru_ptr->apll_b_con[0] :
-				&cru_ptr->apll_l_con[0];
-
-	apll_l_hz = apll_cfgs[apll_freq]->freq;
-
-	rkclk_set_pll(pll_con, apll_cfgs[apll_freq]);
-
-	aclkm_div = div_round_up(apll_l_hz, ACLKM_CORE_HZ) - 1;
+	u32 aclkm_div, atclk_div, pclk_dbg_div, apll_hz;
+	int con_base, parent;
+	u32 *pll_con;
+
+	switch (cluster) {
+	case CPU_CLUSTER_LITTLE:
+		con_base = 0;
+		parent = CLK_CORE_PLL_SEL_ALPLL;
+		pll_con = &cru_ptr->apll_l_con[0];
+		break;
+	case CPU_CLUSTER_BIG:
+	default:
+		con_base = 2;
+		parent = CLK_CORE_PLL_SEL_ABPLL;
+		pll_con = &cru_ptr->apll_b_con[0];
+		break;
+	}
 
-	pclk_dbg_div = div_round_up(apll_l_hz, PCLK_DBG_HZ) - 1;
+	apll_hz = apll_cfgs[freq]->freq;
+	rkclk_set_pll(pll_con, apll_cfgs[freq]);
 
-	atclk_div = div_round_up(apll_l_hz, ATCLK_CORE_HZ) - 1;
+	aclkm_div = div_round_up(apll_hz, ACLKM_CORE_HZ) - 1;
+	pclk_dbg_div = div_round_up(apll_hz, PCLK_DBG_HZ) - 1;
+	atclk_div = div_round_up(apll_hz, ATCLK_CORE_HZ) - 1;
 
 	write32(&cru_ptr->clksel_con[con_base],
 		RK_CLRSETBITS(ACLKM_CORE_DIV_CON_MASK <<
diff --git a/src/soc/rockchip/rk3399/include/soc/clock.h b/src/soc/rockchip/rk3399/include/soc/clock.h
index e04b21628a..59260510bc 100644
--- a/src/soc/rockchip/rk3399/include/soc/clock.h
+++ b/src/soc/rockchip/rk3399/include/soc/clock.h
@@ -101,9 +101,14 @@ enum apll_frequencies {
 	APLL_600_MHZ,
 };
 
+enum cpu_cluster {
+	CPU_CLUSTER_LITTLE,
+	CPU_CLUSTER_BIG,
+};
+
 void rkclk_init(void);
 int rkclk_configure_vop_dclk(u32 vop_id, u32 dclk_hz);
-void rkclk_configure_cpu(enum apll_frequencies apll_freq, bool is_big);
+void rkclk_configure_cpu(enum apll_frequencies freq, enum cpu_cluster cluster);
 void rkclk_configure_ddr(unsigned int hz);
 void rkclk_configure_emmc(void);
 void rkclk_configure_i2s(unsigned int hz);
diff --git a/src/soc/rockchip/rk3399/soc.c b/src/soc/rockchip/rk3399/soc.c
index 1adf3f6959..12c757f1ea 100644
--- a/src/soc/rockchip/rk3399/soc.c
+++ b/src/soc/rockchip/rk3399/soc.c
@@ -18,6 +18,7 @@
 #include <cpu/cpu.h>
 #include <device/device.h>
 #include <soc/addressmap.h>
+#include <soc/clock.h>
 #include <soc/display.h>
 #include <stddef.h>
 #include <stdlib.h>
@@ -42,6 +43,9 @@ static void soc_init(device_t dev)
 				_framebuffer_size);
 	else
 		printk(BIOS_INFO, "Display initialization disabled.\n");
+
+	/* We don't need big CPUs, but bring them up as a courtesy to Linux. */
+	rkclk_configure_cpu(APLL_600_MHZ, CPU_CLUSTER_BIG);
 }
 
 static struct device_operations soc_ops = {