When building on ARCH=um (which does not set HAS_IOMEM), kconfig
reports an unmet dependency caused by PINCTRL_STMFX. It selects
MFD_STMFX, which depends on HAS_IOMEM. To stop this warning,
PINCTRL_STMFX should also depend on HAS_IOMEM.

kconfig warning:
WARNING: unmet direct dependencies detected for MFD_STMFX
  Depends on [n]: HAS_IOMEM [=n] && I2C [=y] && OF [=y]
  Selected by [y]:
  - PINCTRL_STMFX [=y] && PINCTRL [=y] && I2C [=y] && OF_GPIO [=y]

Fixes: 1490d9f841b1 ("pinctrl: Add STMFX GPIO expander Pinctrl/GPIO driver")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
---
Cc: Amelie Delaunay <amelie.delaunay@st.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org

 drivers/pinctrl/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20250814.orig/drivers/pinctrl/Kconfig
+++ linux-next-20250814/drivers/pinctrl/Kconfig
@@ -539,6 +539,7 @@ config PINCTRL_STMFX
 	tristate "STMicroelectronics STMFX GPIO expander pinctrl driver"
 	depends on I2C
 	depends on OF_GPIO
+	depends on HAS_IOMEM
 	select GENERIC_PINCONF
 	select GPIOLIB_IRQCHIP
 	select MFD_STMFX

On Fri, Aug 15, 2025 at 4:27 AM Randy Dunlap <rdunlap@infradead.org> wrote:

> When building on ARCH=um (which does not set HAS_IOMEM), kconfig
> reports an unmet dependency caused by PINCTRL_STMFX. It selects
> MFD_STMFX, which depends on HAS_IOMEM. To stop this warning,
> PINCTRL_STMFX should also depend on HAS_IOMEM.
>
> kconfig warning:
> WARNING: unmet direct dependencies detected for MFD_STMFX
>   Depends on [n]: HAS_IOMEM [=n] && I2C [=y] && OF [=y]
>   Selected by [y]:
>   - PINCTRL_STMFX [=y] && PINCTRL [=y] && I2C [=y] && OF_GPIO [=y]
>
> Fixes: 1490d9f841b1 ("pinctrl: Add STMFX GPIO expander Pinctrl/GPIO driver")
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>

Patch applied for fixes!

Yours,
Linus Walleij