diff options
| author | Wenyou Yang <wenyou.yang@atmel.com> | 2017-04-07 15:14:46 +0800 |
|---|---|---|
| committer | Jagan Teki <jagan@openedev.com> | 2017-05-03 10:58:54 +0530 |
| commit | 61a77ce1d5a63856328605822b69d8abaeb7f593 (patch) | |
| tree | 4ac42b106522012525b85e9b210ed2bd0380e5fd | |
| parent | a63d800196ebee59b0f8ff924f67843cd597a8c1 (diff) | |
spi: atmel: check GPIO validity before using cs_gpios
Before using the cs_gpio, check if the GPIO is valid or not.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
| -rw-r--r-- | drivers/spi/atmel_spi.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c index 7649114231..4701b79f16 100644 --- a/drivers/spi/atmel_spi.c +++ b/drivers/spi/atmel_spi.c @@ -296,6 +296,9 @@ 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; + if (!dm_gpio_is_valid(&priv->cs_gpios[cs])) + return; + dm_gpio_set_value(&priv->cs_gpios[cs], 0); } @@ -306,6 +309,9 @@ 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; + if (!dm_gpio_is_valid(&priv->cs_gpios[cs])) + return; + dm_gpio_set_value(&priv->cs_gpios[cs], 1); } @@ -473,6 +479,9 @@ static int atmel_spi_probe(struct udevice *bus) } for(i = 0; i < ARRAY_SIZE(priv->cs_gpios); i++) { + if (!dm_gpio_is_valid(&priv->cs_gpios[i])) + continue; + dm_gpio_set_dir_flags(&priv->cs_gpios[i], GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE); } |