[PATCH 00/14] pinctrl: rockchip: fix editing const struct + constify rockchip_pin_ctrl

[Quentin Schulz]

While testing some WIP work done by Ilias Apalodimas on guaranteeing
read-only memory areas truly are handled as read-only[1], my RK3588
Tiger couldn't reach U-Boot CLI anymore because of the pinctrl driver
modifying a const struct rockchip_pin_ctrl, triggering a CPU abort.

Instead of going the lazy way and unconstify it, let's fix the actual
issue in play.

The member modified in the const is only ever used for setting a member
from another struct (not const that one). However this other member is
never read! Therefore we can simply afford to remove it which means the
sole reader of the member in the const is now gone, thus making it
possible to remove the member from the const struct as well.

This also means we should be able to constify the private data of the
controller device for all Rockchip devices, instead of having those only
for RK356x, RK3588 and RV1126. With the constify done on top of Ilias
branch[1], my PX30 Ringneck, RK3399 Puma and RK3588 Tiger all reach
U-Boot CLI. No further test (like booting into Linux userspace) was
done.

[1] https://source.denx.de/u-boot/custodians/u-boot-tpm/-/tree/fix_memory_permissions

Signed-off-by: Quentin Schulz <quentin.schulz at cherry.de>
---
Quentin Schulz (14):
      pinctrl: rockchip: remove unused base_pin bank member
      pinctrl: rockchip: remove unused nr_pins controller member
      pinctrl: rockchip: constify rockchip_pin_ctrl for PX30
      pinctrl: rockchip: constify rockchip_pin_ctrl for RK3036
      pinctrl: rockchip: constify rockchip_pin_ctrl for RK3066
      pinctrl: rockchip: constify rockchip_pin_ctrl for RK3128
      pinctrl: rockchip: constify rockchip_pin_ctrl for RK3188
      pinctrl: rockchip: constify rockchip_pin_ctrl for RK3228
      pinctrl: rockchip: constify rockchip_pin_ctrl for RK3288
      pinctrl: rockchip: constify rockchip_pin_ctrl for RK3308
      pinctrl: rockchip: constify rockchip_pin_ctrl for RK3328
      pinctrl: rockchip: constify rockchip_pin_ctrl for RK3368
      pinctrl: rockchip: constify rockchip_pin_ctrl for RK3399
      pinctrl: rockchip: constify rockchip_pin_ctrl for RV1108

 drivers/pinctrl/rockchip/pinctrl-px30.c          | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk3036.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk3066.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk3128.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk3188.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk322x.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk3288.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk3308.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk3328.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk3368.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk3399.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rk3568.c        | 1 -
 drivers/pinctrl/rockchip/pinctrl-rk3588.c        | 1 -
 drivers/pinctrl/rockchip/pinctrl-rockchip-core.c | 2 --
 drivers/pinctrl/rockchip/pinctrl-rockchip.h      | 3 ---
 drivers/pinctrl/rockchip/pinctrl-rv1108.c        | 2 +-
 drivers/pinctrl/rockchip/pinctrl-rv1126.c        | 1 -
 17 files changed, 12 insertions(+), 20 deletions(-)
---
base-commit: a2b489b170f8382f746202c36616eaf2bc38fe86
change-id: 20250129-rockchip-pinctrl-const-f4123019a584

Best regards,
-- 
Quentin Schulz <quentin.schulz at cherry.de>