Improve support for the NanoPi Fire 3 (add SPU1705, DVFS, thermal tab…

…les, etc.)

* implemented improved support for the FriendlyArm NanoPi Fire3
* introduced new WIP board configuration "nanopifire3"
* added and enabled the FA SPU1705 regulator
* enabled CPU-based thermal support
* implemented DT-based DVFS table (400MHz-1.4GHz)
* fixed and updated the thermal table and cooling maps
* added support for the onboard LED
* minor patch cleanup

config/boards/nanopifire3.wip

@@ -0,0 +1,16 @@
+# S5P6818 octa core 1Gb SoC
+BOARD_NAME="NanoPi Fire3"
+BOARDFAMILY="s5p6818"
+BOOTCONFIG="nanopifire3_defconfig"
+#
+MODULES=""
+MODULES_NEXT="g_serial"
+CPUMIN="400000"
+CPUMAX="1400000"
+#
+KERNEL_TARGET="next"
+CLI_TARGET="stretch:next"
+DESKTOP_TARGET="xenial:next"
+#
+CLI_BETA_TARGET="bionic:next"
+#

config/kernel/linux-s5p6818-next.config

@@ -2366,8 +2366,8 @@ CONFIG_THERMAL_GOV_STEP_WISE=y
 # CONFIG_THERMAL_GOV_BANG_BANG is not set
 # CONFIG_THERMAL_GOV_USER_SPACE is not set
 # CONFIG_THERMAL_GOV_POWER_ALLOCATOR is not set
-# CONFIG_CPU_THERMAL is not set
-# CONFIG_THERMAL_EMULATION is not set
+CONFIG_CPU_THERMAL=y
+CONFIG_THERMAL_EMULATION=y
 # CONFIG_QORIQ_THERMAL is not set
 
 #
@@ -2553,6 +2553,7 @@ CONFIG_REGULATOR_AXP228=y
 # CONFIG_REGULATOR_PV88080 is not set
 # CONFIG_REGULATOR_PV88090 is not set
 # CONFIG_REGULATOR_PWM is not set
+CONFIG_REGULATOR_SPU1705=y
 # CONFIG_REGULATOR_TPS51632 is not set
 # CONFIG_REGULATOR_TPS62360 is not set
 # CONFIG_REGULATOR_TPS65023 is not set