This patch set introduces DeviceTree support for the NXP FRDM-IMX91S
development board based on the i.MX91 SoC. FRDM-IMX91S is a cost-optimized
variant of FRDM-IMX91 and differs in several hardware aspects:

- 512MB LPDDR4 (FRDM-IMX91 uses 1GB)
- 256MB FlexSPI-NAND (FRDM-IMX91 uses 8GB eMMC)
- Single GbE port (FRDM-IMX91 has dual GbE)
- PMIC PF9453 (FRDM-IMX91 uses PCA9451A)

This patch has been tested on FRDM-IMX91S board and verified for basic
functionality.

For more details about the FRDM-IMX91S board, see:
https://www.nxp.com/design/design-center/development-boards-and-designs/FRDM-IMX91S

Signed-off-by: Yanan Yang <yanan.yang@nxp.com>
---
Changes in v2:
- Correct author name: removed extra period in "Yanan.Yang"
- Removed aliases pointing to disabled nodes from DTS
- Add "rtc0 = &pcf2131;" in aliases to make external RTC the primary device
- Fix DT node name: change
  "usdhc1_pwrseq: usdhc1_pwrseq" to "usdhc1_pwrseq: usdhc1-pwrseq"
- Renamed LED node from 'status' to 'led-0' to comply with gpio-leds binding
- Replace regulator-based transceiver (reg_can_stby) with CAN PHY (nxp,tja1051)
- Replaced 'xceiver-supply' property with 'phys' in flexcan1 node
- Adjusted alignment in fsl,pins property: used spaces between pin names and values for proper DTS style.
- Refined commit message in dt binding patch to clarify board differences
- Link to v1: https://lore.kernel.org/r/20251205-imx91s-frdm-v1-0-afd6cd01c299@nxp.com

---
Yanan Yang (2):
      dt-bindings: arm: fsl: Add FRDM-IMX91S board
      arm64: dts: freescale: add NXP FRDM-IMX91S board support

 Documentation/devicetree/bindings/arm/fsl.yaml     |   1 +
 arch/arm64/boot/dts/freescale/Makefile             |   1 +
 .../boot/dts/freescale/imx91-11x11-frdm-s.dts      | 677 +++++++++++++++++++++
 3 files changed, 679 insertions(+)
---
base-commit: bc04acf4aeca588496124a6cf54bfce3db327039
change-id: 20251205-imx91s-frdm-2c339bcc2f6f

Best regards,
-- 
Yanan Yang <yanan.yang@nxp.com>