Hi Andrew,
I'm resending this to you due to unresponsiveness from the SuperH
maintainers (v2 sent before on May 11, pinged on June 30 and August 14).
Magnus Damm reported that on sh7722/Migo-R, pinctrl registration fails
with:
sh-pfc pfc-sh7722: pin 0 already registered
sh-pfc pfc-sh7722: error during pin registration
sh-pfc pfc-sh7722: could not register: -22
sh-pfc: probe of pfc-sh7722 failed with error -22
pinmux_pins[] is initialized through PINMUX_GPIO(), using designated
array initializers, where the GPIO_* enums serve as indices.
Apparently GPIO_PTQ7 was defined in the enum, but never used.
If enum values are defined, but never used, pinmux_pins[] contains
(zero-filled) holes. Hence such entries are treated as pin zero, which
was registered before, and pinctrl registration fails.
I can't see how this ever worked, as at the time of commit f5e25ae52feff2dc
("sh-pfc: Add sh7722 pinmux support"), pinmux_gpios[] in
drivers/pinctrl/sh-pfc/pfc-sh7722.c already had the hole, and
drivers/pinctrl/core.c already had the check.
Some scripting revealed a few more broken drivers:
- sh7757 has four holes, due to nonexistent GPIO_PT[JLNQ]7_RESV.
- sh7264 and sh7269 define GPIO_PH[0-7], but don't use it with
PINMUX_GPIO().
Patch 1 fixes the issue on sh7722, and was tested.
Patches 3-4 should fix the issue on the other 3 SoCs, but was untested due
to lack of hardware.
Changes compared to v1:
- Replace fake error messages by references to sh7722,
- Add Reviewed-by, Tested-by.
Thanks for applying!
Geert Uytterhoeven (4):
sh: sh7722: Remove nonexistent GPIO_PTQ7 to fix pinctrl registration
sh: sh7757: Remove nonexistent GPIO_PT[JLNQ]7_RESV to fix pinctrl
registration
sh: sh7264: Remove nonexistent GPIO_PH[0-7] to fix pinctrl
registration
sh: sh7269: Remove nonexistent GPIO_PH[0-7] to fix pinctrl
registration
arch/sh/include/cpu-sh2a/cpu/sh7264.h | 4 +---
arch/sh/include/cpu-sh2a/cpu/sh7269.h | 4 +---
arch/sh/include/cpu-sh4/cpu/sh7722.h | 2 +-
arch/sh/include/cpu-sh4/cpu/sh7757.h | 8 ++++----
4 files changed, 7 insertions(+), 11 deletions(-)
--
2.7.4
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
