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-rw-r--r--drivers/gpio/gpio-74x164.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index a6607faf2fdf..6b535ec858cc 100644
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -9,6 +9,7 @@
* published by the Free Software Foundation.
*/
+#include <linux/gpio/consumer.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/spi/spi.h>
@@ -31,6 +32,7 @@ struct gen_74x164_chip {
* numbering, store the bytes in reverse order.
*/
u8 buffer[0];
+ struct gpio_desc *gpiod_oe;
};
static int __gen_74x164_write_config(struct gen_74x164_chip *chip)
@@ -126,6 +128,13 @@ static int gen_74x164_probe(struct spi_device *spi)
if (!chip)
return -ENOMEM;
+ chip->gpiod_oe = devm_gpiod_get_optional(&spi->dev, "enable",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(chip->gpiod_oe))
+ return PTR_ERR(chip->gpiod_oe);
+
+ gpiod_set_value_cansleep(chip->gpiod_oe, 1);
+
spi_set_drvdata(spi, chip);
chip->gpio_chip.label = spi->modalias;
@@ -164,6 +173,7 @@ static int gen_74x164_remove(struct spi_device *spi)
{
struct gen_74x164_chip *chip = spi_get_drvdata(spi);
+ gpiod_set_value_cansleep(chip->gpiod_oe, 0);
gpiochip_remove(&chip->gpio_chip);
mutex_destroy(&chip->lock);