add nitropad-shutdown.sh for EC based poweroff

Dasharo · Sep 5, 2023 · 902866c · 902866c
1 parent 033333f
commit 902866c
Showing 1 changed file with 36 additions and 0 deletions.
diff --git a/initrd/bin/nitropad-shutdown.sh b/initrd/bin/nitropad-shutdown.sh
@@ -0,0 +1,36 @@
+#!/bin/ash
+
+# Method to access IT5570 IO Depth 2 registers
+it5570_i2ec() {
+  # TODO: Use /dev/port instead of iotools
+
+  # Address high byte
+  iotools io_write8 0x2e 0x2e
+  iotools io_write8 0x2f 0x11
+  iotools io_write8 0x2e 0x2f
+  iotools io_write8 0x2f $(($2>>8 & 0xff))
+
+  # Address low byte
+  iotools io_write8 0x2e 0x2e
+  iotools io_write8 0x2f 0x10
+  iotools io_write8 0x2e 0x2f
+  iotools io_write8 0x2f $(($2 & 0xff))
+
+  # Data
+  iotools io_write8 0x2e 0x2e
+  iotools io_write8 0x2f 0x12
+  iotools io_write8 0x2e 0x2f
+
+  case $1 in
+    "r")
+      iotools io_read8 0x2f
+      ;;
+    "w")
+      iotools io_write8 0x2f "$3"
+      ;;
+  esac
+}
+
+# shut down using EC external watchdog reset
+it5570_i2ec w 0x1f01 0x20
+it5570_i2ec w 0x1f07 0x01