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axp20x_power_off() triggers shutdown by writing AXP20X_OFF (BIT(7)) to the power-off control register with regmap_write(), which rewrites the whole register and clears other control bits in it. On the AXP221/AXP223 (and the register-compatible AXP228) - that register also holds the CHGLED auto-control bit. Clearing it during an orderly shutdown disables the hardware charge indicator, so the charge LED stays dark while the board is powered off and charging. Other variants keep unrelated configuration in the same register too. Set only the power-off bit with regmap_set_bits() and leave the rest of the register untouched. The shutdown register is readable on every variant, so the read-modify-write should be safe. Tested on a ClockworkPi uConsole (Raspberry Pi Compute Module 4, AXP228, which enumerates as AXP221): register AXP20X_OFF_CTRL reads 0x08 at runtime, so the old code left it 0x80 whereas setting only BIT(7) leaves 0x88. Writing 0x88 at power-off enables the charge LED while still powering off the PMIC. Signed-off-by: Oleg Proshkin <oleg.pro171@gmail.com> Reviewed-by: Chen-Yu Tsai <wens@kernel.org> Link: https://patch.msgid.link/20260611154629.76607-1-oleg.pro171@gmail.com Signed-off-by: Lee Jones <lee@kernel.org>
1479 lines
51 KiB
1479 lines
51 KiB