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| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2018-12-18 09:31:49 +0100 |
|---|---|---|
| committer | Geert Uytterhoeven <geert+renesas@glider.be> | 2019-04-02 09:58:04 +0200 |
| commit | c481c8178420b8cc8b188807fe6eee8b069ce2d8 (patch) | |
| tree | ca61ce438d43f3af5541b23e6ba7146c90c04ebd /drivers/pinctrl | |
| parent | pinctrl: sh-pfc: Absorb enum IDs in PINMUX_DATA_REG() macro (diff) | |
| download | linux-c481c8178420b8cc8b188807fe6eee8b069ce2d8.tar.xz linux-c481c8178420b8cc8b188807fe6eee8b069ce2d8.zip | |
pinctrl: sh-pfc: Validate enum IDs for regs with fixed-width fields
Add build-time checks to the PINMUX_CFG_REG() and PINMUX_DATA_REG()
macros, to ensure the number of provided enum IDs is correct.
This helps catching bugs early.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/sh-pfc/sh_pfc.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/pinctrl/sh-pfc/sh_pfc.h b/drivers/pinctrl/sh-pfc/sh_pfc.h index 57e13b623b2e..31acde5032a0 100644 --- a/drivers/pinctrl/sh-pfc/sh_pfc.h +++ b/drivers/pinctrl/sh-pfc/sh_pfc.h @@ -130,7 +130,9 @@ struct pinmux_cfg_reg { */ #define PINMUX_CFG_REG(name, r, r_width, f_width, ids) \ .reg = r, .reg_width = r_width, \ - .field_width = f_width + BUILD_BUG_ON_ZERO(r_width % f_width), \ + .field_width = f_width + BUILD_BUG_ON_ZERO(r_width % f_width) + \ + BUILD_BUG_ON_ZERO(sizeof((const u16 []) { ids }) / sizeof(u16) != \ + (r_width / f_width) * (1 << f_width)), \ .enum_ids = (const u16 [(r_width / f_width) * (1 << f_width)]) \ { ids } @@ -196,7 +198,9 @@ struct pinmux_data_reg { * enum ID must be specified, all wrapped using the GROUP() macro. */ #define PINMUX_DATA_REG(name, r, r_width, ids) \ - .reg = r, .reg_width = r_width, \ + .reg = r, .reg_width = r_width + \ + BUILD_BUG_ON_ZERO(sizeof((const u16 []) { ids }) / sizeof(u16) != \ + r_width), \ .enum_ids = (const u16 [r_width]) { ids } struct pinmux_irq { |