diff mbox series

pinctrl: lochnagar: select GPIOLIB

Message ID 20191218163701.171914-1-arnd@arndb.de
State Accepted
Commit f7e36e18946b4ec756b9c5cf4fb8891be8d1e4a3
Headers show
Series pinctrl: lochnagar: select GPIOLIB | expand

Commit Message

Arnd Bergmann Dec. 18, 2019, 4:36 p.m. UTC
In a rare randconfig build I came across one configuration that does
not enable CONFIG_GPIOLIB, which is needed by lochnagar:

ERROR: "devm_gpiochip_add_data" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!
ERROR: "gpiochip_generic_free" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!
ERROR: "gpiochip_generic_request" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!
ERROR: "gpiochip_get_data" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!

Add another 'select' like all other pinctrl drivers have.

Fixes: 0548448b719a ("pinctrl: lochnagar: Add support for the Cirrus Logic Lochnagar")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

---
I wonder if GPIOLIB should just become mandatory when enabling the pinctrl
subsystem, or if there are still good reasons for leaving it disabled
on any machine that uses CONFIG_PINCTRL.
---
 drivers/pinctrl/cirrus/Kconfig | 1 +
 1 file changed, 1 insertion(+)

-- 
2.20.0

Comments

Charles Keepax Dec. 19, 2019, 9:27 a.m. UTC | #1
On Wed, Dec 18, 2019 at 05:36:46PM +0100, Arnd Bergmann wrote:
> In a rare randconfig build I came across one configuration that does

> not enable CONFIG_GPIOLIB, which is needed by lochnagar:

> 

> ERROR: "devm_gpiochip_add_data" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!

> ERROR: "gpiochip_generic_free" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!

> ERROR: "gpiochip_generic_request" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!

> ERROR: "gpiochip_get_data" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!

> 

> Add another 'select' like all other pinctrl drivers have.

> 

> Fixes: 0548448b719a ("pinctrl: lochnagar: Add support for the Cirrus Logic Lochnagar")

> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

> ---


Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>


Thanks,
Charles
Linus Walleij Jan. 7, 2020, 9:45 a.m. UTC | #2
On Wed, Dec 18, 2019 at 5:37 PM Arnd Bergmann <arnd@arndb.de> wrote:

> In a rare randconfig build I came across one configuration that does
> not enable CONFIG_GPIOLIB, which is needed by lochnagar:
>
> ERROR: "devm_gpiochip_add_data" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!
> ERROR: "gpiochip_generic_free" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!
> ERROR: "gpiochip_generic_request" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!
> ERROR: "gpiochip_get_data" [drivers/pinctrl/cirrus/pinctrl-lochnagar.ko] undefined!
>
> Add another 'select' like all other pinctrl drivers have.
>
> Fixes: 0548448b719a ("pinctrl: lochnagar: Add support for the Cirrus Logic Lochnagar")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Patch applied!

> I wonder if GPIOLIB should just become mandatory when enabling the pinctrl
> subsystem, or if there are still good reasons for leaving it disabled
> on any machine that uses CONFIG_PINCTRL.

Hm that is a tricky question, they almost always come in pair but are
technically speaking separate subsystems.

I have a (very) long-term plan to merge them at some point before
I retire :D

Yours,
Linus Walleij
Arnd Bergmann Jan. 7, 2020, 10:39 a.m. UTC | #3
On Tue, Jan 7, 2020 at 10:45 AM Linus Walleij <linus.walleij@linaro.org> wrote:
> On Wed, Dec 18, 2019 at 5:37 PM Arnd Bergmann <arnd@arndb.de> wrote:
> > I wonder if GPIOLIB should just become mandatory when enabling the pinctrl
> > subsystem, or if there are still good reasons for leaving it disabled
> > on any machine that uses CONFIG_PINCTRL.
>
> Hm that is a tricky question, they almost always come in pair but are
> technically speaking separate subsystems.

I think there are a number of use cases for GPIOLIB drivers without PINCTRL, but
are there any examples of the reverse?

       Arnd
diff mbox series

Patch

diff --git a/drivers/pinctrl/cirrus/Kconfig b/drivers/pinctrl/cirrus/Kconfig
index f1806fd781a0..530426a74f75 100644
--- a/drivers/pinctrl/cirrus/Kconfig
+++ b/drivers/pinctrl/cirrus/Kconfig
@@ -2,6 +2,7 @@ 
 config PINCTRL_LOCHNAGAR
 	tristate "Cirrus Logic Lochnagar pinctrl driver"
 	depends on MFD_LOCHNAGAR
+	select GPIOLIB
 	select PINMUX
 	select PINCONF
 	select GENERIC_PINCONF