Re: [PATCH 2/2] regmap: sdw: Remove 8-bit value size restriction

[Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>]

> -static int regmap_sdw_write(void *context, unsigned int reg, unsigned int val)
> +static int regmap_sdw_write(void *context, const void *val_buf, size_t val_size)
>  {
>  	struct device *dev = context;
>  	struct sdw_slave *slave = dev_to_sdw_dev(dev);
> +	/* First word of buffer contains the destination address */
> +	u32 addr = le32_to_cpu(*(const __le32 *)val_buf);
> +	const u8 *val = val_buf;
>  
> -	return sdw_write_no_pm(slave, reg, val);
> +	return sdw_nwrite_no_pm(slave, addr, val_size - sizeof(addr), val + sizeof(addr));
>  }
>  
> -static int regmap_sdw_read(void *context, unsigned int reg, unsigned int *val)
> +static int regmap_sdw_gather_write(void *context,
> +				   const void *reg_buf, size_t reg_size,
> +				   const void *val_buf, size_t val_size)
>  {
>  	struct device *dev = context;
>  	struct sdw_slave *slave = dev_to_sdw_dev(dev);
> -	int read;
> +	u32 addr = le32_to_cpu(*(const __le32 *)reg_buf);

what's the difference between regmap_sdw_write() and
regmap_sdw_gather_write()? Seems to me that it's the same functionality
of writing at consecutive addresses. It's not a true 'gather' in the
sense that only the first address is used?

>  
> -	read = sdw_read_no_pm(slave, reg);
> -	if (read < 0)
> -		return read;
> +	return sdw_nwrite_no_pm(slave, addr, val_size, val_buf);
> +}
>  
> -	*val = read;
> -	return 0;