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 <[email protected]> --- 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
