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

On Mon, Jun 22, 2020 at 9:25 PM Mikhail Kshevetskiy mikhail.kshevetskiy@oktetlabs.ru wrote:

From: Mikhail Kshevetskiy Mikhail.Kshevetskiy@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@oktetlabs.ru

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

Jagan.