* [PATCH 0/2] pinctrl: sh-pfc: r8a77990: Rework GP6_9 no pull down handling
@ 2019-01-11 11:57 Geert Uytterhoeven
2019-01-11 11:57 ` [PATCH 1/2] pinctrl: sh-pfc: r8a77990: GP6_9 does not have pull-down capability Geert Uytterhoeven
2019-01-11 11:57 ` [PATCH 2/2] Revert "pinctrl: sh-pfc: r8a77990: Add support for pull-up only pins" Geert Uytterhoeven
0 siblings, 2 replies; 5+ messages in thread
From: Geert Uytterhoeven @ 2019-01-11 11:57 UTC (permalink / raw)
To: Linus Walleij, Yoshihiro Shimoda
Cc: linux-renesas-soc, linux-gpio, Geert Uytterhoeven
Hi,
Commit f4caa6ee736fa8a4 ("pinctrl: sh-pfc: r8a77990: Add support for pull-up
only pins") added an explicit check for the GP6_9 pin on R-Car E3, which
supports pull-up, but not pull-down.
However, I had forgotten this limitation can be expressed better by
dropping the SH_PFC_PIN_CFG_PULL_DOWN flag from the GPIO description, as
it includes returning an error to the caller when trying to configure
the pin for pull-down.
Hence this patch series drops the SH_PFC_PIN_CFG_PULL_DOWN flag, and
reverts the previous solution.
This has been tested on by adding the following to the pfc node in
arch/arm64/boot/dts/renesas/r8a77990-ebisu.dts:
pinctrl-0 = <&test6_9>;
pinctrl-names = "default";
test6_9: test6_9 {
pins = "GP_6_9";
bias-pull-down;
};
I plan to queue this up in sh-pfc-for-v5.1.
Thanks!
Geert Uytterhoeven (2):
pinctrl: sh-pfc: r8a77990: GP6_9 does not have pull-down capability
Revert "pinctrl: sh-pfc: r8a77990: Add support for pull-up only pins"
drivers/pinctrl/sh-pfc/pfc-r8a77990.c | 34 ++++++++++++---------------
1 file changed, 15 insertions(+), 19 deletions(-)
--
2.17.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH 1/2] pinctrl: sh-pfc: r8a77990: GP6_9 does not have pull-down capability
2019-01-11 11:57 [PATCH 0/2] pinctrl: sh-pfc: r8a77990: Rework GP6_9 no pull down handling Geert Uytterhoeven
@ 2019-01-11 11:57 ` Geert Uytterhoeven
2019-01-11 12:49 ` Simon Horman
2019-01-11 11:57 ` [PATCH 2/2] Revert "pinctrl: sh-pfc: r8a77990: Add support for pull-up only pins" Geert Uytterhoeven
1 sibling, 1 reply; 5+ messages in thread
From: Geert Uytterhoeven @ 2019-01-11 11:57 UTC (permalink / raw)
To: Linus Walleij, Yoshihiro Shimoda
Cc: linux-renesas-soc, linux-gpio, Geert Uytterhoeven
Hence remove the SH_PFC_PIN_CFG_PULL_DOWN flag from the GP6_9 GPIO
description.
Fixes: 83f6941a42a5e773 ("pinctrl: sh-pfc: r8a77990: Add bias pinconf support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
drivers/pinctrl/sh-pfc/pfc-r8a77990.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a77990.c b/drivers/pinctrl/sh-pfc/pfc-r8a77990.c
index 1ce286f7b286dde7..a1d99980788ac1cb 100644
--- a/drivers/pinctrl/sh-pfc/pfc-r8a77990.c
+++ b/drivers/pinctrl/sh-pfc/pfc-r8a77990.c
@@ -30,7 +30,16 @@
PORT_GP_CFG_1(3, 15, fn, sfx, CFG_FLAGS), \
PORT_GP_CFG_11(4, fn, sfx, CFG_FLAGS | SH_PFC_PIN_CFG_IO_VOLTAGE), \
PORT_GP_CFG_20(5, fn, sfx, CFG_FLAGS), \
- PORT_GP_CFG_18(6, fn, sfx, CFG_FLAGS)
+ PORT_GP_CFG_9(6, fn, sfx, CFG_FLAGS), \
+ PORT_GP_CFG_1(6, 9, fn, sfx, SH_PFC_PIN_CFG_PULL_UP), \
+ PORT_GP_CFG_1(6, 10, fn, sfx, CFG_FLAGS), \
+ PORT_GP_CFG_1(6, 11, fn, sfx, CFG_FLAGS), \
+ PORT_GP_CFG_1(6, 12, fn, sfx, CFG_FLAGS), \
+ PORT_GP_CFG_1(6, 13, fn, sfx, CFG_FLAGS), \
+ PORT_GP_CFG_1(6, 14, fn, sfx, CFG_FLAGS), \
+ PORT_GP_CFG_1(6, 15, fn, sfx, CFG_FLAGS), \
+ PORT_GP_CFG_1(6, 16, fn, sfx, CFG_FLAGS), \
+ PORT_GP_CFG_1(6, 17, fn, sfx, CFG_FLAGS)
/*
* F_() : just information
* FM() : macro for FN_xxx / xxx_MARK
--
2.17.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 2/2] Revert "pinctrl: sh-pfc: r8a77990: Add support for pull-up only pins"
2019-01-11 11:57 [PATCH 0/2] pinctrl: sh-pfc: r8a77990: Rework GP6_9 no pull down handling Geert Uytterhoeven
2019-01-11 11:57 ` [PATCH 1/2] pinctrl: sh-pfc: r8a77990: GP6_9 does not have pull-down capability Geert Uytterhoeven
@ 2019-01-11 11:57 ` Geert Uytterhoeven
2019-01-11 12:49 ` Simon Horman
1 sibling, 1 reply; 5+ messages in thread
From: Geert Uytterhoeven @ 2019-01-11 11:57 UTC (permalink / raw)
To: Linus Walleij, Yoshihiro Shimoda
Cc: linux-renesas-soc, linux-gpio, Geert Uytterhoeven
This reverts commit f4caa6ee736fa8a46c806ba4382c16f7e5a20248.
The same can be expressed better by dropping the
SH_PFC_PIN_CFG_PULL_DOWN flag from the GPIO description, as it includes
returning an error to the caller when trying to configure the pin for
pull-down, causing:
sh-pfc e6060000.pin-controller: pin_config_set op failed for pin 201
sh-pfc e6060000.pin-controller: Error applying setting, reverse things back
sh-pfc e6060000.pin-controller: failed to select default state
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
drivers/pinctrl/sh-pfc/pfc-r8a77990.c | 23 +++++------------------
1 file changed, 5 insertions(+), 18 deletions(-)
diff --git a/drivers/pinctrl/sh-pfc/pfc-r8a77990.c b/drivers/pinctrl/sh-pfc/pfc-r8a77990.c
index a1d99980788ac1cb..967b3fec45f516d1 100644
--- a/drivers/pinctrl/sh-pfc/pfc-r8a77990.c
+++ b/drivers/pinctrl/sh-pfc/pfc-r8a77990.c
@@ -4927,17 +4927,6 @@ static const struct pinmux_bias_reg pinmux_bias_regs[] = {
{ /* sentinel */ },
};
-static bool pin_has_pud(unsigned int pin)
-{
- /* Some pins are pull-up only */
- switch (pin) {
- case RCAR_GP_PIN(6, 9): /* USB30_OVC */
- return false;
- }
-
- return true;
-}
-
static unsigned int r8a77990_pinmux_get_bias(struct sh_pfc *pfc,
unsigned int pin)
{
@@ -4950,7 +4939,7 @@ static unsigned int r8a77990_pinmux_get_bias(struct sh_pfc *pfc,
if (!(sh_pfc_read(pfc, reg->puen) & BIT(bit)))
return PIN_CONFIG_BIAS_DISABLE;
- else if (!pin_has_pud(pin) || (sh_pfc_read(pfc, reg->pud) & BIT(bit)))
+ else if (sh_pfc_read(pfc, reg->pud) & BIT(bit))
return PIN_CONFIG_BIAS_PULL_UP;
else
return PIN_CONFIG_BIAS_PULL_DOWN;
@@ -4971,13 +4960,11 @@ static void r8a77990_pinmux_set_bias(struct sh_pfc *pfc, unsigned int pin,
if (bias != PIN_CONFIG_BIAS_DISABLE)
enable |= BIT(bit);
- if (pin_has_pud(pin)) {
- updown = sh_pfc_read(pfc, reg->pud) & ~BIT(bit);
- if (bias == PIN_CONFIG_BIAS_PULL_UP)
- updown |= BIT(bit);
+ 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);
}
--
2.17.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] pinctrl: sh-pfc: r8a77990: GP6_9 does not have pull-down capability
2019-01-11 11:57 ` [PATCH 1/2] pinctrl: sh-pfc: r8a77990: GP6_9 does not have pull-down capability Geert Uytterhoeven
@ 2019-01-11 12:49 ` Simon Horman
0 siblings, 0 replies; 5+ messages in thread
From: Simon Horman @ 2019-01-11 12:49 UTC (permalink / raw)
To: Geert Uytterhoeven
Cc: Linus Walleij, Yoshihiro Shimoda, linux-renesas-soc, linux-gpio
On Fri, Jan 11, 2019 at 12:57:43PM +0100, Geert Uytterhoeven wrote:
> Hence remove the SH_PFC_PIN_CFG_PULL_DOWN flag from the GP6_9 GPIO
> description.
>
> Fixes: 83f6941a42a5e773 ("pinctrl: sh-pfc: r8a77990: Add bias pinconf support")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 2/2] Revert "pinctrl: sh-pfc: r8a77990: Add support for pull-up only pins"
2019-01-11 11:57 ` [PATCH 2/2] Revert "pinctrl: sh-pfc: r8a77990: Add support for pull-up only pins" Geert Uytterhoeven
@ 2019-01-11 12:49 ` Simon Horman
0 siblings, 0 replies; 5+ messages in thread
From: Simon Horman @ 2019-01-11 12:49 UTC (permalink / raw)
To: Geert Uytterhoeven
Cc: Linus Walleij, Yoshihiro Shimoda, linux-renesas-soc, linux-gpio
On Fri, Jan 11, 2019 at 12:57:44PM +0100, Geert Uytterhoeven wrote:
> This reverts commit f4caa6ee736fa8a46c806ba4382c16f7e5a20248.
>
> The same can be expressed better by dropping the
> SH_PFC_PIN_CFG_PULL_DOWN flag from the GPIO description, as it includes
> returning an error to the caller when trying to configure the pin for
> pull-down, causing:
>
> sh-pfc e6060000.pin-controller: pin_config_set op failed for pin 201
> sh-pfc e6060000.pin-controller: Error applying setting, reverse things back
> sh-pfc e6060000.pin-controller: failed to select default state
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2019-01-11 12:50 UTC | newest]
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2019-01-11 11:57 [PATCH 0/2] pinctrl: sh-pfc: r8a77990: Rework GP6_9 no pull down handling Geert Uytterhoeven
2019-01-11 11:57 ` [PATCH 1/2] pinctrl: sh-pfc: r8a77990: GP6_9 does not have pull-down capability Geert Uytterhoeven
2019-01-11 12:49 ` Simon Horman
2019-01-11 11:57 ` [PATCH 2/2] Revert "pinctrl: sh-pfc: r8a77990: Add support for pull-up only pins" Geert Uytterhoeven
2019-01-11 12:49 ` Simon Horman
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