[PATCH 05/60] pinctrl: renesas: Add generic support for pin group subsets
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: 2021-12-23 14:42:18
Also in:
linux-renesas-soc
Subsystem:
pin control subsystem, pin controller - renesas, the rest · Maintainers:
Linus Walleij, Geert Uytterhoeven, Linus Torvalds
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 <geert+renesas@glider.be> --- drivers/pinctrl/renesas/sh_pfc.h | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/pinctrl/renesas/sh_pfc.h b/drivers/pinctrl/renesas/sh_pfc.h
index d6292a79282f198e..6f7fe21c982e5f48 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;
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2.25.1