On Tue, Jan 28, 2025 at 09:17:24AM +0100, patrice.chotard@xxxxxxxxxxx wrote:
> +static int stm32_ospi_tx_poll(struct stm32_ospi *ospi, u8 *buf, u32 len, bool read)
> +{
> + if (read)
> + tx_fifo = stm32_ospi_read_fifo;
> + else
> + tx_fifo = stm32_ospi_write_fifo;
> + tx_fifo(buf++, regs_base + OSPI_DR);
It feels like the _tx_poll and tx_fifo naming is a landmine waiting to
surprise people in the future. The code sharing makes sense but the
naming is just looking to cause surprises, especially with it just being
a bool selecting read or write.
> +static int stm32_ospi_tx(struct stm32_ospi *ospi, const struct spi_mem_op *op)
> +{
> + return stm32_ospi_tx_poll(ospi, buf, op->data.nbytes,
> + op->data.dir == SPI_MEM_DATA_IN);
Though the one caller is also using _tx only naming, it's a bit more
tied in with the op sending though.
> + ctrl->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD |
> + SPI_TX_DUAL | SPI_TX_QUAD |
> + SPI_TX_OCTAL | SPI_RX_OCTAL;
> + ctrl->setup = stm32_ospi_setup;
> + ctrl->bus_num = -1;
> + ctrl->mem_ops = &stm32_ospi_mem_ops;
> + ctrl->use_gpio_descriptors = true;
> + ctrl->transfer_one_message = stm32_ospi_transfer_one_message;
> + ctrl->num_chipselect = STM32_OSPI_MAX_NORCHIP;
> + ctrl->dev.of_node = dev->of_node;
It looks like the controller only does half duplex as well so it should
set SPI_CONTROLLER_HALF_DUPLEX.
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