Re: [PATCH v2] arm64: dts: imx8mp: Add DT overlays for DH i.MX8M Plus DHCOM SoM and boards

On Tue, Mar 24, 2026 at 08:04:19PM +0100, Marek Vasut wrote:

Add DT overlays to support DH i.MX8M Plus DHCOM SoM variants and carrier
board expansion modules. The following DT overlays are implemented:
- SoM:
  - DH 660-x00 SoM with 1xRMII PHY
  - DH 660-x00 SoM with 2xRMII PHY
- PDK2:
  - DH 505-200 Display board in edge connector X12 via direct LVDS
  - DH 531-100 SPI/I2C board in header X21
  - DH 531-200 SPI/I2C board in header X22
  - DH 560-200 Display board in edge connector X12
- PDK3:
  - DH 505-200 Display board in edge connector X36 via direct LVDS
  - DH 531-100 SPI/I2C board in header X40
  - DH 531-200 SPI/I2C board in header X41
  - DH 560-300 Display board in edge connector X36
  - EA muRata 2AE M.2 A/E-Key card in connector X20
  - NXP SPF-29853-C1 MINISASTOCSI with OV5640 sensor in connector X31
  - NXP SPF-29853-C1 MINISASTOCSI with OV5640 sensor in connector X29
- PicoITX:
  - DH 626-100 Display board in edge connector X2

...

+ * Copyright (C) 2022-2026 Marek Vasut
+ */
+/dts-v1/;
+/plugin/;
+
+#define DH_OVERLAY_PANEL_I2C_BUS			i2c5
+#define DH_OVERLAY_PANEL_I2C_TOUCHSCREEN_PINCTRL	&pinctrl_dhcom_b &pinctrl_dhcom_h

This is not straight forward.

you can add label like panel_i2c at dts file.

panel_i2c: &i2c5 {
}

in overlay file use

&panel_i2c {
	....
}

So you use the same overlay file for difference dts. The same as others

Frank

+#define DH_OVERLAY_PANEL_I2C_TOUCHSCREEN_IRQ_PARENT	gpio1
+#define DH_OVERLAY_PANEL_I2C_TOUCHSCREEN_IRQ_PIN	11
+#define DH_OVERLAY_PANEL_I2C_TOUCHSCREEN_RESET_GPIO	gpio1
+#define DH_OVERLAY_PANEL_I2C_TOUCHSCREEN_RESET_PIN	8