diff options
Diffstat (limited to 'drivers/spi/spi-atmel.c')
| -rw-r--r-- | drivers/spi/spi-atmel.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index ac5e2ddf9e1b..d88e2aa64839 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -371,7 +371,7 @@ static void cs_activate(struct atmel_spi *as, struct spi_device *spi) mr = spi_readl(as, MR); mr = SPI_BFINS(PCS, ~(1 << chip_select), mr); - if (spi->cs_gpiod && spi->chip_select != 0) + if (spi->cs_gpiod) gpiod_set_value(spi->cs_gpiod, 1); spi_writel(as, MR, mr); } @@ -402,7 +402,7 @@ static void cs_deactivate(struct atmel_spi *as, struct spi_device *spi) if (!spi->cs_gpiod) spi_writel(as, CR, SPI_BIT(LASTXFER)); - else if (atmel_spi_is_v2(as) || spi->chip_select != 0) + else gpiod_set_value(spi->cs_gpiod, 0); } @@ -1193,7 +1193,16 @@ static void initialize_native_cs_for_gpio(struct atmel_spi *as) if (!master->cs_gpiods) return; /* No CS GPIO */ - for (i = 0; i < 4; i++) + /* + * On the first version of the controller (AT91RM9200), CS0 + * can't be used associated with GPIO + */ + if (atmel_spi_is_v2(as)) + i = 0; + else + i = 1; + + for (; i < 4; i++) if (master->cs_gpiods[i]) as->native_cs_free |= BIT(i); |