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Message-ID: <20181021061924.GA11073@nishad>
Date: Sun, 21 Oct 2018 11:49:28 +0530
From: Nishad Kamdar <nishadkamdar@...il.com>
To: Lars-Peter Clausen <lars@...afoo.de>
Cc: Michael Hennerich <Michael.Hennerich@...log.com>,
Jonathan Cameron <jic23@...nel.org>,
Hartmut Knaack <knaack.h@....de>,
Peter Meerwald-Stadler <pmeerw@...erw.net>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-iio@...r.kernel.org, devel@...verdev.osuosl.org,
linux-kernel@...r.kernel.org, outreachy-kernel@...glegroups.com
Subject: [PATCH] staging: iio: ad2s1210: Switch to the gpio descriptor
interface
Use the gpiod interface instead of the deprecated old non-descriptor
interface.
Signed-off-by: Nishad Kamdar <nishadkamdar@...il.com>
---
drivers/staging/iio/resolver/ad2s1210.c | 110 +++++++++++++++---------
drivers/staging/iio/resolver/ad2s1210.h | 3 -
2 files changed, 71 insertions(+), 42 deletions(-)
diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index ac13b99bd9cb..ed372a5f9130 100644
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -15,7 +15,7 @@
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/iio/iio.h>
@@ -73,6 +73,11 @@ struct ad2s1210_state {
const struct ad2s1210_platform_data *pdata;
struct mutex lock;
struct spi_device *sdev;
+ struct gpio_desc *sample;
+ struct gpio_desc *a0;
+ struct gpio_desc *a1;
+ struct gpio_desc *res0;
+ struct gpio_desc *res1;
unsigned int fclkin;
unsigned int fexcit;
bool hysteresis;
@@ -91,8 +96,8 @@ static const int ad2s1210_mode_vals[4][2] = {
static inline void ad2s1210_set_mode(enum ad2s1210_mode mode,
struct ad2s1210_state *st)
{
- gpio_set_value(st->pdata->a[0], ad2s1210_mode_vals[mode][0]);
- gpio_set_value(st->pdata->a[1], ad2s1210_mode_vals[mode][1]);
+ gpiod_set_value(st->a0, ad2s1210_mode_vals[mode][0]);
+ gpiod_set_value(st->a1, ad2s1210_mode_vals[mode][1]);
st->mode = mode;
}
@@ -152,8 +157,8 @@ int ad2s1210_update_frequency_control_word(struct ad2s1210_state *st)
static unsigned char ad2s1210_read_resolution_pin(struct ad2s1210_state *st)
{
- int resolution = (gpio_get_value(st->pdata->res[0]) << 1) |
- gpio_get_value(st->pdata->res[1]);
+ int resolution = (gpiod_get_value(st->res0) << 1) |
+ gpiod_get_value(st->res1);
return ad2s1210_resolution_value[resolution];
}
@@ -164,10 +169,10 @@ static const int ad2s1210_res_pins[4][2] = {
static inline void ad2s1210_set_resolution_pin(struct ad2s1210_state *st)
{
- gpio_set_value(st->pdata->res[0],
- ad2s1210_res_pins[(st->resolution - 10) / 2][0]);
- gpio_set_value(st->pdata->res[1],
- ad2s1210_res_pins[(st->resolution - 10) / 2][1]);
+ gpiod_set_value(st->res0,
+ ad2s1210_res_pins[(st->resolution - 10) / 2][0]);
+ gpiod_set_value(st->res1,
+ ad2s1210_res_pins[(st->resolution - 10) / 2][1]);
}
static inline int ad2s1210_soft_reset(struct ad2s1210_state *st)
@@ -401,15 +406,15 @@ static ssize_t ad2s1210_clear_fault(struct device *dev,
int ret;
mutex_lock(&st->lock);
- gpio_set_value(st->pdata->sample, 0);
+ gpiod_set_value(st->sample, 0);
/* delay (2 * tck + 20) nano seconds */
udelay(1);
- gpio_set_value(st->pdata->sample, 1);
+ gpiod_set_value(st->sample, 1);
ret = ad2s1210_config_read(st, AD2S1210_REG_FAULT);
if (ret < 0)
goto error_ret;
- gpio_set_value(st->pdata->sample, 0);
- gpio_set_value(st->pdata->sample, 1);
+ gpiod_set_value(st->sample, 0);
+ gpiod_set_value(st->sample, 1);
error_ret:
mutex_unlock(&st->lock);
@@ -466,7 +471,7 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev,
s16 vel;
mutex_lock(&st->lock);
- gpio_set_value(st->pdata->sample, 0);
+ gpiod_set_value(st->sample, 0);
/* delay (6 * tck + 20) nano seconds */
udelay(1);
@@ -512,7 +517,7 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev,
}
error_ret:
- gpio_set_value(st->pdata->sample, 1);
+ gpiod_set_value(st->sample, 1);
/* delay (2 * tck + 20) nano seconds */
udelay(1);
mutex_unlock(&st->lock);
@@ -628,32 +633,59 @@ static const struct iio_info ad2s1210_info = {
.attrs = &ad2s1210_attribute_group,
};
-static int ad2s1210_setup_gpios(struct ad2s1210_state *st)
+static int ad2s1210_setup_gpios(struct spi_device *spi,
+ struct ad2s1210_state *st)
{
- unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
- struct gpio ad2s1210_gpios[] = {
- { st->pdata->sample, GPIOF_DIR_IN, "sample" },
- { st->pdata->a[0], flags, "a0" },
- { st->pdata->a[1], flags, "a1" },
- { st->pdata->res[0], flags, "res0" },
- { st->pdata->res[0], flags, "res1" },
- };
+ int ret = 0;
+ unsigned long flags = st->pdata->gpioin ? GPIOD_IN : GPIOD_OUT_LOW;
+
+ st->sample = devm_gpiod_get(&spi->dev, "sample", GPIOD_IN);
+ if (IS_ERR(st->sample)) {
+ ret = PTR_ERR(st->sample);
+ dev_err(&spi->dev, "Failed to request sample GPIO: %d\n",
+ ret);
+ return ret;
+ }
+ st->a0 = devm_gpiod_get(&spi->dev, "a0", flags);
+ if (IS_ERR(st->a0)) {
+ ret = PTR_ERR(st->a0);
+ dev_err(&spi->dev, "Failed to request a0 GPIO: %d\n",
+ ret);
+ return ret;
+ }
+ st->a1 = devm_gpiod_get(&spi->dev, "a1", flags);
+ if (IS_ERR(st->a1)) {
+ ret = PTR_ERR(st->a1);
+ dev_err(&spi->dev, "Failed to request a1 GPIO: %d\n",
+ ret);
+ return ret;
+ }
+ st->res0 = devm_gpiod_get(&spi->dev, "res0", flags);
+ if (IS_ERR(st->res0)) {
+ ret = PTR_ERR(st->res0);
+ dev_err(&spi->dev, "Failed to request res0 GPIO: %d\n",
+ ret);
+ return ret;
+ }
+ st->res1 = devm_gpiod_get(&spi->dev, "res1", flags);
+ if (IS_ERR(st->res1)) {
+ ret = PTR_ERR(st->res1);
+ dev_err(&spi->dev, "Failed to request res1 GPIO: %d\n",
+ ret);
+ return ret;
+ }
- return gpio_request_array(ad2s1210_gpios, ARRAY_SIZE(ad2s1210_gpios));
+ return ret;
}
-static void ad2s1210_free_gpios(struct ad2s1210_state *st)
+static void ad2s1210_free_gpios(struct spi_device *spi,
+ struct ad2s1210_state *st)
{
- unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
- struct gpio ad2s1210_gpios[] = {
- { st->pdata->sample, GPIOF_DIR_IN, "sample" },
- { st->pdata->a[0], flags, "a0" },
- { st->pdata->a[1], flags, "a1" },
- { st->pdata->res[0], flags, "res0" },
- { st->pdata->res[0], flags, "res1" },
- };
-
- gpio_free_array(ad2s1210_gpios, ARRAY_SIZE(ad2s1210_gpios));
+ devm_gpiod_put(&spi->dev, st->sample);
+ devm_gpiod_put(&spi->dev, st->a0);
+ devm_gpiod_put(&spi->dev, st->a1);
+ devm_gpiod_put(&spi->dev, st->res0);
+ devm_gpiod_put(&spi->dev, st->res1);
}
static int ad2s1210_probe(struct spi_device *spi)
@@ -670,7 +702,7 @@ static int ad2s1210_probe(struct spi_device *spi)
return -ENOMEM;
st = iio_priv(indio_dev);
st->pdata = spi->dev.platform_data;
- ret = ad2s1210_setup_gpios(st);
+ ret = ad2s1210_setup_gpios(spi, st);
if (ret < 0)
return ret;
@@ -702,7 +734,7 @@ static int ad2s1210_probe(struct spi_device *spi)
return 0;
error_free_gpios:
- ad2s1210_free_gpios(st);
+ ad2s1210_free_gpios(spi, st);
return ret;
}
@@ -711,7 +743,7 @@ static int ad2s1210_remove(struct spi_device *spi)
struct iio_dev *indio_dev = spi_get_drvdata(spi);
iio_device_unregister(indio_dev);
- ad2s1210_free_gpios(iio_priv(indio_dev));
+ ad2s1210_free_gpios(spi, iio_priv(indio_dev));
return 0;
}
diff --git a/drivers/staging/iio/resolver/ad2s1210.h b/drivers/staging/iio/resolver/ad2s1210.h
index e9b2147701fc..63d479b20a6c 100644
--- a/drivers/staging/iio/resolver/ad2s1210.h
+++ b/drivers/staging/iio/resolver/ad2s1210.h
@@ -12,9 +12,6 @@
#define _AD2S1210_H
struct ad2s1210_platform_data {
- unsigned int sample;
- unsigned int a[2];
- unsigned int res[2];
bool gpioin;
};
#endif /* _AD2S1210_H */
--
2.17.1
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