[U-Boot] [PATCH 03/16] spi: Add non DM version of SPI_MEM

[Vignesh R]

On 28/01/19 12:27 PM, Jagan Teki wrote:
> On Wed, Dec 12, 2018 at 11:08 PM Vignesh R <vigneshr at ti.com> wrote:
>>
>> Add non DM version of SPI_MEM to support easy migration to new SPI NOR
>> framework. This can be removed once DM_SPI conversion is complete.
>>
>> Signed-off-by: Vignesh R <vigneshr at ti.com>
>> ---
>>  drivers/spi/Kconfig        |  4 +-
>>  drivers/spi/Makefile       |  1 +
>>  drivers/spi/spi-mem-nodm.c | 89 ++++++++++++++++++++++++++++++++++++++
>>  3 files changed, 92 insertions(+), 2 deletions(-)
>>  create mode 100644 drivers/spi/spi-mem-nodm.c
>>
[...]
>> +int spi_mem_adjust_op_size(struct spi_slave *slave,
>> +                          struct spi_mem_op *op)
>> +{
>> +       return 0;
> 
> Does it not return data size of SPI mem, or not need for non-dm?
> 

/**
 * spi_mem_adjust_op_size() - Adjust the data size of a SPI mem operation to
 *                               match controller limitations
 * @slave: the SPI device
 * @op: the operation to adjust
 *
 * Some controllers have FIFO limitations and must split a data transfer
 * operation into multiple ones, others require a specific alignment for
 * optimized accesses. This function allows SPI mem drivers to split a single
 * operation into multiple sub-operations when required.
 *
 * Return: a negative error code if the controller can't properly adjust @op,
 *         0 otherwise. Note that @op->data.nbytes will be updated if @op
 *         can't be handled in a single step.
 */

I will modify the function to take care of spi->max_write_size and spi->max_read_size
in DM and non-DM case (instead of spi-nor-core.c).

-- 
Regards
Vignesh