git.openwrt.org Git - openwrt/staging/nbd.git/blob

   1 From 52cababc9c1914ebf50929bfb9a67c8f74cd60ab Mon Sep 17 00:00:00 2001
   2 From: Alexey Charkov <alchark@gmail.com>
   3 Date: Tue, 4 Feb 2025 13:02:28 +0400
   4 Subject: arm64: dts: rockchip: switch Rock 5C to PMIC-based TSHUT reset
   5
   6 Radxa Rock 5C supports both CRU-based (default) and PMIC-based reset
   7 upon thermal runaway conditions. The former resets the SoC by internally
   8 poking the CRU from TSADC, while the latter power-cycles the whole board
   9 by pulling the PMIC reset line low in case of uncontrolled overheating.
  10
  11 Switch to a PMIC-based reset, as the more 'thorough' of the two.
  12
  13 Tested by temporarily setting rockchip,hw-tshut-temp to 65C to simulate
  14 overheating - this causes the board to reset when any of the on-chip
  15 temperature sensors surpasses the tshut temperature.
  16
  17 Requires Alexander's patch [1] fixing TSADC pinctrl assignment
  18
  19 [1] https://lore.kernel.org/r/20250130053849.4902-1-eagle.alexander923@gmail.com
  20
  21 Signed-off-by: Alexey Charkov <alchark@gmail.com>
  22 Reviewed-by: Dragan Simic <dsimic@manjaro.org>
  23 Link: https://lore.kernel.org/r/20250204-rock-5c-tshut-v1-1-33301e4eef64@gmail.com
  24 Signed-off-by: Heiko Stuebner <heiko@sntech.de>
  25
  26 --- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
  27 +++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
  28 @@ -873,6 +873,8 @@
  29  };
  30
  31  &tsadc {
  32 +       rockchip,hw-tshut-mode = <1>; /* tshut mode 0:CRU 1:GPIO */
  33 +       rockchip,hw-tshut-polarity = <0>; /* tshut polarity 0:LOW 1:HIGH */
  34         status = "okay";
  35  };
  36