add 1632mhz overclock CPU mode

true overclocking

Author: cobaltgit

static/Emus/.emu_setup/cpu_switch.sh

@@ -14,8 +14,12 @@ case "$CPU_MODE" in
         NEW_DISPLAY="Perf"
         ;;
     "performance")
+        NEW_MODE="maximum"
+        NEW_DISPLAY="Max"
+        ;;
+    "maximum")
         NEW_MODE="overclock"
-        NEW_DISPLAY="Overclock"
+		NEW_DISPLAY="Overclock"
         ;;
     "overclock")
         NEW_MODE="smart"
@@ -26,4 +30,8 @@ esac
 sed -i "s|\"CPU:.*\"|\"CPU: $NEW_DISPLAY\"|g" "$CONFIG"
 sed -i "s|CPU_MODE=.*|CPU_MODE=\"$NEW_MODE\"|g" "$OPT"
 
-display -d 1000 -t "CPU mode for $EMU set to $NEW_MODE."
+if [ "$NEW_MODE" = "overclock" ]; then
+    display -d 1000 -t "CPU mode for $EMU set to $NEW_MODE. Please be aware of potential instability that may occur."
+else
+    display -d 1000 -t "CPU mode for $EMU set to $NEW_MODE."
+fi

static/System/scripts/helpers.sh

@@ -9,7 +9,8 @@ export THEME_PATH="$(awk -F'"' '/"theme":/ {print $4}' "/mnt/UDISK/system.json"
 # Possible modes
 # - smart: modified conservative governor that responds better to usage spikes, balancing performance with battery life. Min/max frequencies can be specified by the user, defaults to 816-1344MHz
 # - performance: constant 1344mhz frequency, best for fast forwarding retro systems without too much heat
-# - overclock: constant 1536mhz frequency, best suited for harder to run games (i.e. SNES SuperFX or 3D PSX)
+# - maximum: constant 1536mhz frequency, best suited for harder to run games (i.e. SNES SuperFX or 3D PSX)
+# - overclock: constant 1632mhz frequency, best suited for the most demanding games. CAUTION: this may cause instability!
 set_cpuclock() {
     chmod a+w /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
     chmod a+w /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
@@ -39,10 +40,14 @@ set_cpuclock() {
             echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
             echo 1344000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
             ;;
-        "overclock")
+        "maximum")
             echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
             echo 1536000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
             ;;
+        "overclock")
+            echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
+            devmem 0x01C20000 32 0x80001030 # direct PLL_CPUX register manipulation
+            ;;
     esac
 
     chmod a-w /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor