rockchip: rk3399: Initialize CPU B clock.
This patch sets the PLL of CPU cluster B (BPLL) to 600 MHz.
This decreases the boot time of Linux 4.19 by about 8%.
The 600 MHz are inspired by the 600 MHz used for LPLL initialization
(came in with commit 9f636a249c1).
Tested on RK3399-Q7 on Haikou base board.
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
diff --git a/arch/arm/include/asm/arch-rockchip/cru_rk3399.h b/arch/arm/include/asm/arch-rockchip/cru_rk3399.h
index b18de9f..15eeb9c 100644
--- a/arch/arm/include/asm/arch-rockchip/cru_rk3399.h
+++ b/arch/arm/include/asm/arch-rockchip/cru_rk3399.h
@@ -69,16 +69,21 @@
#define MHz 1000000
#define KHz 1000
#define OSC_HZ (24*MHz)
-#define APLL_HZ (600*MHz)
+#define LPLL_HZ (600*MHz)
+#define BPLL_HZ (600*MHz)
#define GPLL_HZ (594*MHz)
#define CPLL_HZ (384*MHz)
#define PPLL_HZ (676*MHz)
#define PMU_PCLK_HZ (48*MHz)
-#define ACLKM_CORE_HZ (300*MHz)
-#define ATCLK_CORE_HZ (300*MHz)
-#define PCLK_DBG_HZ (100*MHz)
+#define ACLKM_CORE_L_HZ (300*MHz)
+#define ATCLK_CORE_L_HZ (300*MHz)
+#define PCLK_DBG_L_HZ (100*MHz)
+
+#define ACLKM_CORE_B_HZ (300*MHz)
+#define ATCLK_CORE_B_HZ (300*MHz)
+#define PCLK_DBG_B_HZ (100*MHz)
#define PERIHP_ACLK_HZ (148500*KHz)
#define PERIHP_HCLK_HZ (148500*KHz)
@@ -98,4 +103,13 @@
APLL_L_600_MHZ,
};
+enum apll_b_frequencies {
+ APLL_B_600_MHZ,
+};
+
+void rk3399_configure_cpu_l(struct rk3399_cru *cru,
+ enum apll_l_frequencies apll_l_freq);
+void rk3399_configure_cpu_b(struct rk3399_cru *cru,
+ enum apll_b_frequencies apll_b_freq);
+
#endif /* __ASM_ARCH_CRU_RK3399_H_ */