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https://github.com/archr-linux/Arch-R.git
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42 lines
1.6 KiB
Plaintext
42 lines
1.6 KiB
Plaintext
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#!/bin/bash
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# Arch R — systemd shutdown hook for RK817 PMIC power-off
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#
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# Installed to: /usr/lib/systemd/system-shutdown/pmic-poweroff
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#
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# systemd-shutdown(8) executes all scripts in /usr/lib/systemd/system-shutdown/
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# at the VERY END of the shutdown sequence, after all services are stopped and
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# all filesystems are unmounted/remounted read-only.
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#
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# Argument $1 is one of: "poweroff", "halt", "reboot", "kexec"
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#
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# This script calls pmic-poweroff to cut all RK817 power rails via I2C.
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# The kernel's normal pm_power_off handler doesn't work on R36S because
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# the RK817 SLPPIN requires pinctrl_rk8xx which crashes the kernel.
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# Only run on poweroff or halt (NOT reboot)
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case "$1" in
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poweroff|halt) ;;
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*) exit 0 ;;
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esac
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# Try Python pmic-poweroff script (direct I2C to RK817)
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if [ -x /usr/bin/python3 ] && [ -f /usr/local/bin/pmic-poweroff ]; then
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/usr/bin/python3 /usr/local/bin/pmic-poweroff 2>/dev/null
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fi
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# If we're still alive, Python approach failed.
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# Try raw I2C via shell (fallback — needs /dev/i2c-0 accessible)
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if [ -c /dev/i2c-0 ] && command -v i2cset &>/dev/null; then
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# Mask all RK817 interrupts
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i2cset -y -f 0 0x20 0xf9 0xff b 2>/dev/null
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i2cset -y -f 0 0x20 0xfb 0xff b 2>/dev/null
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i2cset -y -f 0 0x20 0xfd 0xff b 2>/dev/null
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# Disable all power rails (LDOs then DCDCs)
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i2cset -y -f 0 0x20 0xb4 0x00 b 2>/dev/null # LDO9+
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i2cset -y -f 0 0x20 0xb3 0x00 b 2>/dev/null # LDO5-8
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i2cset -y -f 0 0x20 0xb2 0x00 b 2>/dev/null # LDO1-4
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i2cset -y -f 0 0x20 0xb1 0x00 b 2>/dev/null # DCDC1-4 + BOOST → CPU dies
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fi
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exit 0
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