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authorShobhit Kukreti <shobhitkukreti@gmail.com>2019-06-10 20:55:57 -0700
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2019-06-17 21:06:49 +0100
commit7e8b817e5978fdaabba37ab1d2ddb062a4c9abbb (patch)
treee5dc2fbf9cfb6ad60115f867400340e90bdb7ad8 /drivers/iio/humidity
parent517b2d045aebf3d662c642723897cf9f66044271 (diff)
iio: humidity: Replace older GPIO APIs with GPIO Consumer APIs for the dht11 sensor
The dht11 driver uses a single gpio to make measurements. It was using the older global gpio numberspace. The patch replaces the old gpio api with the new gpio descriptor based api. Removed header files "linux/gpio.h" and "linux/of_gpio.h" Signed-off-by: Shobhit Kukreti <shobhitkukreti@gmail.com> Acked-by: Harald Geyer <harald@ccbib.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/humidity')
-rw-r--r--drivers/iio/humidity/dht11.c28
1 files changed, 10 insertions, 18 deletions
diff --git a/drivers/iio/humidity/dht11.c b/drivers/iio/humidity/dht11.c
index 1a9f8f4ffb88..08573df2a8c6 100644
--- a/drivers/iio/humidity/dht11.c
+++ b/drivers/iio/humidity/dht11.c
@@ -31,8 +31,7 @@
#include <linux/completion.h>
#include <linux/mutex.h>
#include <linux/delay.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/timekeeping.h>
#include <linux/iio/iio.h>
@@ -81,7 +80,7 @@
struct dht11 {
struct device *dev;
- int gpio;
+ struct gpio_desc *gpiod;
int irq;
struct completion completion;
@@ -188,7 +187,7 @@ static irqreturn_t dht11_handle_irq(int irq, void *data)
if (dht11->num_edges < DHT11_EDGES_PER_READ && dht11->num_edges >= 0) {
dht11->edges[dht11->num_edges].ts = ktime_get_boot_ns();
dht11->edges[dht11->num_edges++].value =
- gpio_get_value(dht11->gpio);
+ gpiod_get_value(dht11->gpiod);
if (dht11->num_edges >= DHT11_EDGES_PER_READ)
complete(&dht11->completion);
@@ -226,12 +225,12 @@ static int dht11_read_raw(struct iio_dev *iio_dev,
reinit_completion(&dht11->completion);
dht11->num_edges = 0;
- ret = gpio_direction_output(dht11->gpio, 0);
+ ret = gpiod_direction_output(dht11->gpiod, 0);
if (ret)
goto err;
usleep_range(DHT11_START_TRANSMISSION_MIN,
DHT11_START_TRANSMISSION_MAX);
- ret = gpio_direction_input(dht11->gpio);
+ ret = gpiod_direction_input(dht11->gpiod);
if (ret)
goto err;
@@ -303,10 +302,8 @@ MODULE_DEVICE_TABLE(of, dht11_dt_ids);
static int dht11_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct device_node *node = dev->of_node;
struct dht11 *dht11;
struct iio_dev *iio;
- int ret;
iio = devm_iio_device_alloc(dev, sizeof(*dht11));
if (!iio) {
@@ -316,18 +313,13 @@ static int dht11_probe(struct platform_device *pdev)
dht11 = iio_priv(iio);
dht11->dev = dev;
+ dht11->gpiod = devm_gpiod_get(dev, NULL, GPIOD_IN);
+ if (IS_ERR(dht11->gpiod))
+ return PTR_ERR(dht11->gpiod);
- ret = of_get_gpio(node, 0);
- if (ret < 0)
- return ret;
- dht11->gpio = ret;
- ret = devm_gpio_request_one(dev, dht11->gpio, GPIOF_IN, pdev->name);
- if (ret)
- return ret;
-
- dht11->irq = gpio_to_irq(dht11->gpio);
+ dht11->irq = gpiod_to_irq(dht11->gpiod);
if (dht11->irq < 0) {
- dev_err(dev, "GPIO %d has no interrupt\n", dht11->gpio);
+ dev_err(dev, "GPIO %d has no interrupt\n", desc_to_gpio(dht11->gpiod));
return -EINVAL;
}