Enable DVFS for Rockchip boards

Change-Id: bc5190ad-cd3b-43fc-9127-930354102e1b
Signed-off-by: Anton Burticica <mouse@ya.ru>

Author: ya-mouse

arch/arm/dts/rk3576-u-boot.dtsi

@@ -21,6 +21,25 @@
 	};
 };
 
+/*
+ * Wide temperature DVFS properties for U-Boot.
+ * These are vendor-specific properties from rk3576 vendor kernel DTS
+ * that upstream kernel doesn't have. U-Boot DVFS driver needs them.
+ *
+ * Values from vendor rk3576.dtsi:
+ * - rockchip,low-temp = <15000>  (15°C in millidegrees)
+ * - rockchip,max-volt = <950000> (950mV, max from OPP table)
+ */
+&cluster0_opp_table {
+	rockchip,low-temp = <15000>;
+	rockchip,max-volt = <950000>;
+};
+
+&cluster1_opp_table {
+	rockchip,low-temp = <15000>;
+	rockchip,max-volt = <950000>;
+};
+
 #ifdef CONFIG_ROCKCHIP_SPI_IMAGE
 &binman {
 	simple-bin-spi {

arch/arm/mach-rockchip/board.c

@@ -34,6 +34,9 @@
 #include <asm/arch-rockchip/clock.h>
 #include <asm/arch-rockchip/periph.h>
 #include <power/regulator.h>
+#ifdef CONFIG_DM_DVFS
+#include <dvfs.h>
+#endif
 
 #if IS_ENABLED(CONFIG_EFI_HAVE_CAPSULE_SUPPORT) && IS_ENABLED(CONFIG_EFI_PARTITION)
 
@@ -197,6 +200,10 @@ int board_late_init(void)
 	gpt_capsule_update_setup();
 #endif
 
+#ifdef CONFIG_DM_DVFS
+	dvfs_init(true);
+#endif
+
 	return rk_board_late_init();
 }