pinctrl: renesas: Fix DRV register offset

Use fixed 4bit size for generating the DRV register element mask,
not the size of the value, which can be smaller.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

diff --git a/drivers/pinctrl/renesas/pfc.c b/drivers/pinctrl/renesas/pfc.c
index 9001153..b3a4ff9 100644 (file)
--- a/drivers/pinctrl/renesas/pfc.c
+++ b/drivers/pinctrl/renesas/pfc.c
@@ -591,7 +591,7 @@ static int sh_pfc_pinconf_set_drive_strength(struct sh_pfc *pfc,
        strength = strength / step - 1;
 
        val = sh_pfc_read_raw_reg(reg, 32);
-       val &= ~GENMASK(offset + size - 1, offset);
+       val &= ~GENMASK(offset + 4 - 1, offset);
        val |= strength << offset;
 
        if (unlock_reg)