Hello Andy!

On Thu, 2023-06-01 at 19:54 +0300, Andy Shevchenko wrote:

On Thu, Jun 01, 2023 at 08:45:33AM +0300, Nikita Shubin wrote:

quoted

- get keymap from the device tree
- find register range from the device tree
- get interrupts from device tree

...

quoted

+/* flags for the ep93xx_keypad driver */
+#define EP93XX_KEYPAD_DISABLE_3_KEY    (1<<0)  /* disable 3-key
reset */
+#define EP93XX_KEYPAD_DIAG_MODE                (1<<1)  /*
diagnostic mode */
+#define EP93XX_KEYPAD_BACK_DRIVE       (1<<2)  /* back driving
mode */
+#define EP93XX_KEYPAD_TEST_MODE                (1<<3)  /* scan
only column 0 */
+#define EP93XX_KEYPAD_AUTOREPEAT       (1<<4)  /* enable key
autorepeat */

quoted

+static int ep93xx_keypad_flags;
+module_param(ep93xx_keypad_flags, int, 0);
+MODULE_PARM_DESC(ep93xx_keypad_flags, "EP93XX keypad flags.");

Why? This pretty much looks like missing DT description.

From other patches from this series, i learned NOT to add new DT
entities, not even with vendor prefix, no way!

May be i missing something of course...

Either way 

https://elixir.bootlin.com/linux/v6.4-rc4/source/arch/arm/mach-ep93xx/core.c#L577

static struct ep93xx_keypad_platform_data ep93xx_keypad_data;

Was never used in different ways than initializing all to zeroes
including flags since 2.6 (didn't look before through), so i would
prefer to drop this completely than moving it into device tree.

May we should drop ep93xx_keypad entirely, i don't have hardware to
test it anyway, neither does Alexander.

Please, write your commit message better, so we can understand the
point of
such decisions w/o asking.