[PATCH 0/2] gpio/pinctrl: spacemit: Add GPIO pin configuration support for K1

[Junhui Liu]

This add GPIO pin configuration support for the Spacemit K1 SoC. Some
use cases require configuring pin attributes like pull-up/down when using
GPIO lines.

A practical example is the SD card detection pin on the Banana Pi BPI-F3
board. Since it lacks an external pull-up circuit, the pin must be
configured with an internal pull-up to function correctly. Such
configurations can be specified directly in the devicetree:

    cd-gpios = <&gpio K1_GPIO(80) (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;

To address this, add the set_config() callback to the gpio-spacemit-k1
driver to enable pin configuration through pinctrl, and modify the
pinctrl driver to return -ENOTSUPP instead of -EINVAL for unsupported
parameters, allowing the GPIO subsystem to gracefully handle them.

---
Junhui Liu (2):
      pinctrl: spacemit: return -ENOTSUPP for unsupported pin configurations
      gpio: spacemit-k1: Add set_config callback support

 drivers/gpio/gpio-spacemit-k1.c       |  1 +
 drivers/pinctrl/spacemit/pinctrl-k1.c | 21 ++++++++++++---------
 2 files changed, 13 insertions(+), 9 deletions(-)
---
base-commit: b29fb8829bff243512bb8c8908fd39406f9fd4c3
change-id: 20260312-k1-gpio-set-config-f0873e92ebac

Best regards,
-- 
Junhui Liu <junhui.liu at pigmoral.tech>