Re: [PATCH v3 2/7] spi: spi-mem: add support for octo mode I/O data transfer

From: Boris Brezillon
Date: Tue Oct 23 2018 - 05:49:05 EST


On Tue, 23 Oct 2018 09:37:13 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@xxxxxxx> wrote:

> Add support for octo mode I/O data transfer in spi-mem framework.
>
> Signed-off-by: Yogesh Gaur <yogeshnarayan.gaur@xxxxxxx>

Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxx>

> ---
> Changes for v3:
> - Modified string 'octal' with 'octo'.
> Changes for v2:
> - Patch added in v2 version.
>
> drivers/spi/spi-mem.c | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c
> index c6bdea7..2379efc 100644
> --- a/drivers/spi/spi-mem.c
> +++ b/drivers/spi/spi-mem.c
> @@ -12,7 +12,7 @@
>
> #include "internals.h"
>
> -#define SPI_MEM_MAX_BUSWIDTH 4
> +#define SPI_MEM_MAX_BUSWIDTH 8
>
> /**
> * spi_controller_dma_map_mem_op_data() - DMA-map the buffer attached to a
> @@ -121,6 +121,13 @@ static int spi_check_buswidth_req(struct spi_mem *mem, u8 buswidth, bool tx)
>
> break;
>
> + case 8:
> + if ((tx && (mode & SPI_TX_OCTO)) ||
> + (!tx && (mode & SPI_RX_OCTO)))
> + return 0;
> +
> + break;
> +
> default:
> break;
> }