Before using the cs_gpio, check if the GPIO is valid.

Signed-off-by: Wenyou Yang wenyou.yang@atmel.com ---

drivers/spi/atmel_spi.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c index 7649114231..8d29f7c4eb 100644 --- a/drivers/spi/atmel_spi.c +++ b/drivers/spi/atmel_spi.c @@ -296,7 +296,8 @@ static void atmel_spi_cs_activate(struct udevice *dev) struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev); u32 cs = slave_plat->cs;

- dm_gpio_set_value(&priv->cs_gpios[cs], 0); + if (dm_gpio_is_valid(&priv->cs_gpios[cs])) + dm_gpio_set_value(&priv->cs_gpios[cs], 0); }

static void atmel_spi_cs_deactivate(struct udevice *dev) @@ -306,7 +307,8 @@ static void atmel_spi_cs_deactivate(struct udevice *dev) struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev); u32 cs = slave_plat->cs;

- dm_gpio_set_value(&priv->cs_gpios[cs], 1); + if (dm_gpio_is_valid(&priv->cs_gpios[cs])) + dm_gpio_set_value(&priv->cs_gpios[cs], 1); }

static int atmel_spi_xfer(struct udevice *dev, unsigned int bitlen, @@ -473,8 +475,11 @@ static int atmel_spi_probe(struct udevice *bus) }

for(i = 0; i < ARRAY_SIZE(priv->cs_gpios); i++) { - dm_gpio_set_dir_flags(&priv->cs_gpios[i], - GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE); + if (dm_gpio_is_valid(&priv->cs_gpios[i])) { + dm_gpio_set_dir_flags(&priv->cs_gpios[i], + GPIOD_IS_OUT | + GPIOD_IS_OUT_ACTIVE); + } }

writel(ATMEL_SPI_CR_SWRST, &bus_plat->regs->cr);