[PATCH 2/2] mtd: make spinand driver usable without CONFIG_DM

[Jagan Teki]

On Mon, Jun 22, 2020 at 9:25 PM Mikhail Kshevetskiy
<mikhail.kshevetskiy at oktetlabs.ru> wrote:
>
> From: Mikhail Kshevetskiy <Mikhail.Kshevetskiy at oktetlabs.ru>
>
> Here is an example of spinand driver initialization without CONFIG_DM
> enabled:
>
> void board_nand_init(void)
> {
>         static struct spinand_device    spinand;
>         static struct mtd_info          mtd;
>         static struct spi_slave         *slave;
>         int                             ret;
>
>         memset(&spinand, 0, sizeof(spinand));
>         memset(&mtd, 0, sizeof(mtd));
>
>         slave = spi_setup_slave(BUS, CS, MAX_HZ, MODE);
>         if (!slave) {
>                 printf("SPI-NAND: Failed to set up SPI slave\n");
>                 return;
>         }
>
>         slave->mode |= (SPI_TX_BYTE | SPI_RX_SLOW);
>         slave->max_read_size = SPI_MAX_READ_SIZE;
>         slave->max_write_size = SPI_MAX_WRITE_SIZE;
>
>         ret = spinand_probe_no_dm(&spinand, slave, &mtd);
>         if (!ret)
>                 nand_register(0, &mtd);
> }
>
> Using of dual and quad wire transfer modes requires:
> * dual/quad speed capable hardware (both controller and flash)
> * physical presence of 4 data wires (quad mode only)
> * spi controller driver MUST supports slave->mem_ops.exec_op() operations
>   (spi_xfer() interface will suits for single speed data transfer mode
>   only)
>
> Signed-off-by: Mikhail Kshevetskiy <Mikhail.Kshevetskiy at oktetlabs.ru>
> ---

Now it's time for dm only code, better not come up with nondm anymore
as possible, please.

Jagan.