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pinctrl: sh-pfc: Do not unconditionally support PIN_CONFIG_BIAS_DISABLE

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commit 5d7400c4ac upstream.

Always stating PIN_CONFIG_BIAS_DISABLE is supported gives untrue output
when examining /sys/kernel/debug/pinctrl/e6060000.pfc/pinconf-pins if
the operation get_bias() is implemented but the pin is not handled by
the get_bias() implementation. In that case the output will state that
"input bias disabled" indicating that this pin has bias control
support.

Make support for PIN_CONFIG_BIAS_DISABLE depend on that the pin either
supports SH_PFC_PIN_CFG_PULL_UP or SH_PFC_PIN_CFG_PULL_DOWN. This also
solves the issue where SoC specific implementations print error messages
if their particular implementation of {set,get}_bias() is called with a
pin it does not know about.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Niklas Söderlund
2016-11-12 17:04:24 +01:00
committed by Greg Kroah-Hartman
parent ef6eadbf7b
commit 45611fb9e0
1 changed files with 2 additions and 1 deletions
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3
drivers/pinctrl/sh-pfc/pinctrl.c
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@ -483,7 +483,8 @@ static bool sh_pfc_pinconf_validate(struct sh_pfc *pfc, unsigned int _pin,
switch (param) { switch (param) {
case PIN_CONFIG_BIAS_DISABLE: case PIN_CONFIG_BIAS_DISABLE:
return true; return pin->configs &
(SH_PFC_PIN_CFG_PULL_UP | SH_PFC_PIN_CFG_PULL_DOWN);
case PIN_CONFIG_BIAS_PULL_UP: case PIN_CONFIG_BIAS_PULL_UP:
return pin->configs & SH_PFC_PIN_CFG_PULL_UP; return pin->configs & SH_PFC_PIN_CFG_PULL_UP;