Dear Fabio Estevam,
> Introduce spi_cs_is_valid() for validating spi bus and chip select numbers.
>
> Signed-off-by: Fabio Estevam <fabio.este...@freescale.com>
Acked-by: Marek Vasut <ma...@denx.de>
> ---
> Changes since v1:
> - Newly introduced in v2
>
> drivers/spi/mxs_spi.c | 13 +++++++++++--
> 1 files changed, 11 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/spi/mxs_spi.c b/drivers/spi/mxs_spi.c
> index 4e6f14e..e7237e7 100644
> --- a/drivers/spi/mxs_spi.c
> +++ b/drivers/spi/mxs_spi.c
> @@ -51,14 +51,23 @@ void spi_init(void)
> {
> }
>
> +int spi_cs_is_valid(unsigned int bus, unsigned int cs)
> +{
> + /* MXS SPI: 4 ports and 3 chip selects maximum */
> + if (bus > 3 || cs > 2)
> + return 0;
> + else
> + return 1;
> +}
> +
> struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
> unsigned int max_hz, unsigned int mode)
> {
> struct mxs_spi_slave *mxs_slave;
> uint32_t addr;
>
> - if (bus > 3) {
> - printf("MXS SPI: Max bus number is 3\n");
> + if (!spi_cs_is_valid(bus, cs)) {
> + printf("mxs_spi: invalid bus %d / chip select %d\n", bus, cs);
> return NULL;
> }
Best regards,
Marek Vasut
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