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pinctrl: nuvoton: wpcm450: Fix handling of inverted MFSEL bits 

SCS3SEL and KBCCSEL use inverted logic: Whereas in other fields 0
selects the GPIO function and 1 selects the special function, in these
two fields, 0 selects the special function and 1 selects the GPIO
function.

Adjust the code to handle this quirk.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Link: https://lore.kernel.org/r/20221105185911.1547847-3-j.neuschaefer@gmx.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Jonathan Neuschäfer 2022-11-05 19:59:05 +01:00 committed by Linus Walleij
parent 4f1d423cd2
commit 6c98ac4212
1 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
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@ -628,6 +628,9 @@ struct wpcm450_pincfg {
int fn1, reg1, bit1;
};
/* Add this value to bit0 or bit1 to indicate that the MFSEL bit is inverted */
#define INV BIT(5)
static const struct wpcm450_pincfg pincfg[] = {
/* PIN FUNCTION 1 FUNCTION 2 */
WPCM450_PINCFG(0, none, NONE, 0, none, NONE, 0),
@ -665,7 +668,7 @@ static const struct wpcm450_pincfg pincfg[] = {
WPCM450_PINCFG(32, scs1, MFSEL1, 3, none, NONE, 0),
WPCM450_PINCFG(33, scs2, MFSEL1, 4, none, NONE, 0),
WPCM450_PINCFG(34, scs3, MFSEL1, 5, none, NONE, 0),
WPCM450_PINCFG(34, scs3, MFSEL1, 5 | INV, none, NONE, 0),
WPCM450_PINCFG(35, xcs1, MFSEL1, 29, none, NONE, 0),
WPCM450_PINCFG(36, xcs2, MFSEL1, 28, none, NONE, 0),
WPCM450_PINCFG(37, none, NONE, 0, none, NONE, 0), /* DVO */
@ -725,8 +728,8 @@ static const struct wpcm450_pincfg pincfg[] = {
WPCM450_PINCFG(90, r2err, MFSEL1, 15, none, NONE, 0),
WPCM450_PINCFG(91, r2md, MFSEL1, 16, none, NONE, 0),
WPCM450_PINCFG(92, r2md, MFSEL1, 16, none, NONE, 0),
WPCM450_PINCFG(93, kbcc, MFSEL1, 17, none, NONE, 0),
WPCM450_PINCFG(94, kbcc, MFSEL1, 17, none, NONE, 0),
WPCM450_PINCFG(93, kbcc, MFSEL1, 17 | INV, none, NONE, 0),
WPCM450_PINCFG(94, kbcc, MFSEL1, 17 | INV, none, NONE, 0),
WPCM450_PINCFG(95, none, NONE, 0, none, NONE, 0),
WPCM450_PINCFG(96, none, NONE, 0, none, NONE, 0),
@ -805,6 +808,11 @@ static void wpcm450_update_mfsel(struct regmap *gcr_regmap, int reg, int bit, in
{
bool value = (fn == fn_selected);
if (bit & INV) {
value = !value;
bit &= ~INV;
}
regmap_update_bits(gcr_regmap, reg, BIT(bit), value ? BIT(bit) : 0);
}