Before using the cs_gpio, check if the GPIO is valid or not.
Signed-off-by: Wenyou Yang <wenyou.y...@atmel.com>
---
Changes in v3:
- According to the advice from Jagan Teki, rearrange the code.
Changes in v2:
- Rebase on v2017.03.
drivers/spi/atmel_spi.c | 9 +++++++++
1 file changed, 9 insertions(+)
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);
}
--
2.11.0
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