Add a build-time check, to ensure the register and field widths in
descriptors for config registers with fixed-width fields are sane.
This helps catching bugs early.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
v2:
- Convert from run-time to build-time check.
---
drivers/pinctrl/sh-pfc/sh_pfc.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/sh-pfc/sh_pfc.h b/drivers/pinctrl/sh-pfc/sh_pfc.h
index 46d477ff510921f3..56016cb76769c97b 100644
--- a/drivers/pinctrl/sh-pfc/sh_pfc.h
+++ b/drivers/pinctrl/sh-pfc/sh_pfc.h
@@ -126,7 +126,8 @@ struct pinmux_cfg_reg {
* one for each possible combination of the register field bit values.
*/
#define PINMUX_CFG_REG(name, r, r_width, f_width) \
- .reg = r, .reg_width = r_width, .field_width = f_width, \
+ .reg = r, .reg_width = r_width, \
+ .field_width = f_width + BUILD_BUG_ON_ZERO(r_width % f_width), \
.enum_ids = (const u16 [(r_width / f_width) * (1 << f_width)])
/*
--
2.17.1
