[PATCH] arm: dts: socfpga: Add MDK support with external GPIO expander

[Yuslaimi, Alif Zakuan]

Hi Tien Fong,

On 3/6/2026 5:03 pm, Chee, Tien Fong wrote:
> Hi Alif,
> 
> 
> On 21/5/2026 9:53 am, alif.zakuan.yuslaimi at altera.com wrote:
>> From: Tanmay Kathpalia <tanmay.kathpalia at altera.com>
>>
>> Add dedicated device tree and configuration support for Agilex5 Modular
>> DevKit which uses an external GPIO expander for 1.8V signaling control
>> instead of the onboard GPIO used in the Premium DevKit variant.
>>
>> New files added:
>> - socfpga_agilex5_socdk_modular.dts: Main device tree for modular board
>> - socfpga_agilex5_socdk_modular-u-boot.dtsi: U-Boot specific additions
>> - configs/socfpga_agilex5_modular_defconfig: Modular board configuration
>>
>> Key differences from Premium DevKit:
>> - Uses PCA9535 GPIO expander (I2C address 0x27) for voltage switching
>> - GPIO expander pin 1 controls the level shifter for SD I/O voltage
>> - Requires I2C3 and PCA953X driver support in SPL and main U-Boot
>> - Same SD timing configurations but different GPIO control mechanism
>>
>> Configuration changes:
>> - Enable CONFIG_SPL_I2C and CONFIG_SPL_SYS_I2C_DW for SPL I2C support
>> - Enable CONFIG_DM_PCA953X and CONFIG_SPL_DM_PCA953X for GPIO expander
>> - Enable CONFIG_DM_REGULATOR_GPIO and CONFIG_SPL_DM_REGULATOR_GPIO
>> - Add TARGET_SOCFPGA_AGILEX5_MODULAR Kconfig option
> 
> 
> commit message must not claim TARGET_SOCFPGA_AGILEX5_MODULAR, not in the
> diff
> 
> [...]
> 
> 
>> diff --git a/configs/socfpga_agilex5_modular_defconfig b/configs/socfpga_agilex5_modular_defconfig
>> new file mode 100644
>> index 00000000000..3f3a47f02ab
>> --- /dev/null
>> +++ b/configs/socfpga_agilex5_modular_defconfig
>> @@ -0,0 +1,9 @@
>> +#include <configs/socfpga_agilex5_defconfig>
>> +
>> +CONFIG_DEFAULT_DEVICE_TREE="socfpga_agilex5_socdk_modular"
> 
> 
> configs/socfpga_agilex5_modular_defconfig sets
> CONFIG_DEFAULT_DEVICE_TREE="socfpga_agilex5_socdk_modular", but
> arch/arm/dts/Makefile does not list socfpga_agilex5_socdk_modular.dtb
> 
> make socfpga_agilex5_modular_defconfig
> make arch/arm/dts/socfpga_agilex5_socdk_modular.dtb
> → No rule to make target 'arch/arm/dts/socfpga_agilex5_socdk_modular.dtb'
> 
> 
> Best regards,
> 
> Tien Fong
> 
Thank you for pointing this out. I will clean up the commit message as 
well as adding arch/arm/dts/socfpga_agilex5_socdk_modular.dtb in 
Makefile for arch-wide make dtb compilation.

Alif