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spi: atmel: check GPIO validity before using cs_gpios

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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>
This commit is contained in:
Wenyou Yang 2017-04-07 15:14:46 +08:00 • committed by Jagan Teki
parent a63d800196
commit 61a77ce1d5
1 changed files with 9 additions and 0 deletions
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9
drivers/spi/atmel_spi.c
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@ -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);
}