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pinctrl: renesas: rcar: Avoid changing PUDn when disabling bias

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When disabling pin bias, there is no need to touch the LSI pin
pull-up/down control register (PUDn), which selects between pull-up and
pull-down.  Just disabling the pull-up/down function through the LSI pin
pull-enable register (PUENn) is sufficient.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/071ec644de2555da593a4531ef5d3e4d79cf997d.1625064076.git.geert+renesas@glider.be
This commit is contained in:
Geert Uytterhoeven 2021-06-30 16:50:42 +02:00
parent e73f0f0ee7
commit 7ebaa41047
1 changed files with 7 additions and 7 deletions
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14
drivers/pinctrl/renesas/pinctrl.c
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@ -898,17 +898,17 @@ void rcar_pinmux_set_bias(struct sh_pfc *pfc, unsigned int pin,
if (reg->puen) {
enable = sh_pfc_read(pfc, reg->puen) & ~BIT(bit);
if (bias != PIN_CONFIG_BIAS_DISABLE)
if (bias != PIN_CONFIG_BIAS_DISABLE) {
enable |= BIT(bit);
if (reg->pud) {
updown = sh_pfc_read(pfc, reg->pud) & ~BIT(bit);
if (bias == PIN_CONFIG_BIAS_PULL_UP)
updown |= BIT(bit);
if (reg->pud) {
updown = sh_pfc_read(pfc, reg->pud) & ~BIT(bit);
if (bias == PIN_CONFIG_BIAS_PULL_UP)
updown |= BIT(bit);
sh_pfc_write(pfc, reg->pud, updown);
sh_pfc_write(pfc, reg->pud, updown);
}
}
sh_pfc_write(pfc, reg->puen, enable);
} else {
enable = sh_pfc_read(pfc, reg->pud) & ~BIT(bit);