diff options
| author | Geert Uytterhoeven <[email protected]> | 2021-12-23 15:41:15 +0100 |
|---|---|---|
| committer | Geert Uytterhoeven <[email protected]> | 2022-02-22 09:55:56 +0100 |
| commit | 49a7a2742580ccd6194fc2bb26e6777cba9cac58 (patch) | |
| tree | d835bc7d780833f541fa7931e1aa2b7367dacfb7 | |
| parent | a0894be3e017c009736e648887579e363f3b6ed1 (diff) | |
pinctrl: renesas: Add generic support for pin group subsets
It is fairly common for the pins in a pin group to be a subset of the
pins in another pin group. Add a macro for defining a pin group that
refers to a subset of an array of pins. This allows pin groups to share
pin data, and thus save memory.
Signed-off-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/r/b56c4257aee1eab698bae2cf7a08aa05775c0a77.1640269757.git.geert+renesas@glider.be
| -rw-r--r-- | drivers/pinctrl/renesas/sh_pfc.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/pinctrl/renesas/sh_pfc.h b/drivers/pinctrl/renesas/sh_pfc.h index d6292a79282f..6f7fe21c982e 100644 --- a/drivers/pinctrl/renesas/sh_pfc.h +++ b/drivers/pinctrl/renesas/sh_pfc.h @@ -58,6 +58,18 @@ struct sh_pfc_pin { } #define SH_PFC_PIN_GROUP(name) SH_PFC_PIN_GROUP_ALIAS(name, name) +/* + * Define a pin group referring to a subset of an array of pins. + */ +#define SH_PFC_PIN_GROUP_SUBSET(_name, data, first, n) { \ + .name = #_name, \ + .pins = data##_pins + first, \ + .mux = data##_mux + first, \ + .nr_pins = n + \ + BUILD_BUG_ON_ZERO(first + n > ARRAY_SIZE(data##_pins)) + \ + BUILD_BUG_ON_ZERO(first + n > ARRAY_SIZE(data##_mux)), \ +} + struct sh_pfc_pin_group { const char *name; const unsigned int *pins; |