On Wed, Apr 13, 2016 at 07:03:22PM +0800, Po Liu wrote:
> When kernel config with big endian mode, spi master need
> to config regmap data value to be little endian mode. Or else,
> the kernel boot will hang.

> +#ifdef CONFIG_CPU_BIG_ENDIAN
> +	.val_format_endian = REGMAP_ENDIAN_LITTLE,
> +#endif

This should be unconditionally set to native endian if the IP changes
endianness along with the CPU.