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Date: Mon, 23 Mar 2015 15:40:24 +0200
From: Robert Dolca <robert.dolca@...el.com>
To: linux-iio@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>
Cc: linux-kernel@...r.kernel.org, Hartmut Knaack <knaack.h@....de>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald <pmeerw@...erw.net>,
Linus Walleij <linus.walleij@...aro.org>,
Robert Dolca <robert.dolca@...el.com>,
Denis CIOCCA <denis.ciocca@...com>
Subject: [PATCH] IIO: Adds ACPI support for ST gyroscopes
Signed-off-by: Robert Dolca <robert.dolca@...el.com>
---
drivers/iio/common/st_sensors/st_sensors_i2c.c | 35 ++++++++++++++++++++++++++
drivers/iio/gyro/st_gyro_i2c.c | 29 ++++++++++++++++++++-
include/linux/iio/common/st_sensors_i2c.h | 3 +++
3 files changed, 66 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c
index 98cfee29..2f612ec 100644
--- a/drivers/iio/common/st_sensors/st_sensors_i2c.c
+++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c
@@ -13,6 +13,8 @@
#include <linux/slab.h>
#include <linux/iio/iio.h>
#include <linux/of_device.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
#include <linux/iio/common/st_sensors_i2c.h>
@@ -107,6 +109,39 @@ void st_sensors_of_i2c_probe(struct i2c_client *client,
EXPORT_SYMBOL(st_sensors_of_i2c_probe);
#endif
+int st_sensors_acpi_i2c_probe(struct i2c_client *client,
+ const struct acpi_device_id *match)
+{
+ const struct acpi_device_id *id;
+ struct gpio_desc *gpiod_irq;
+ int ret;
+
+ id = acpi_match_device(match, &client->dev);
+ if (!id)
+ return -ENODEV;
+
+ /* Get IRQ GPIO */
+ gpiod_irq = devm_gpiod_get_index(&client->dev, 0, 0);
+ if (IS_ERR(gpiod_irq))
+ return -ENODEV;
+
+ /* Configure IRQ GPIO */
+ ret = gpiod_direction_input(gpiod_irq);
+ if (ret)
+ return ret;
+
+ /* Map the pin to an IRQ */
+ client->irq = gpiod_to_irq(gpiod_irq);
+
+ /* The name from the ACPI match takes precedence if present */
+ memset(client->name, 0, sizeof(client->name));
+ strncpy(client->name, (char *) id->driver_data,
+ min(sizeof(client->name), strlen((char *) id->driver_data)));
+
+ return 0;
+}
+EXPORT_SYMBOL(st_sensors_acpi_i2c_probe);
+
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@...com>");
MODULE_DESCRIPTION("STMicroelectronics ST-sensors i2c driver");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/gyro/st_gyro_i2c.c b/drivers/iio/gyro/st_gyro_i2c.c
index 64480b1..712d23f 100644
--- a/drivers/iio/gyro/st_gyro_i2c.c
+++ b/drivers/iio/gyro/st_gyro_i2c.c
@@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/acpi.h>
#include <linux/i2c.h>
#include <linux/iio/iio.h>
@@ -18,6 +19,25 @@
#include <linux/iio/common/st_sensors_i2c.h>
#include "st_gyro.h"
+static const char L3G4200D_gyro_dev_name[] = "l3g4200d";
+static const char LSM330D_gyro_dev_name[] = "lsm330d_gyro";
+static const char LSM330DL_gyro_dev_name[] = "lsm330dl_gyro";
+static const char LSM330DLC_gyro_dev_name[] = "lsm330dlc_gyro";
+static const char L3GD20_gyro_dev_name[] = "l3gd20";
+static const char L3G4IS_gyro_dev_name[] = "l3g4is_ui";
+static const char LSM330_gyro_dev_name[] = "lsm330_gyro";
+
+static const struct acpi_device_id st_gyro_acpi_match[] = {
+ {"L3G4200D", (kernel_ulong_t) L3G4200D_gyro_dev_name},
+ {"LSM330D", (kernel_ulong_t) LSM330D_gyro_dev_name},
+ {"LSM330D2", (kernel_ulong_t) LSM330DL_gyro_dev_name},
+ {"LSM330D3", (kernel_ulong_t) LSM330DLC_gyro_dev_name},
+ {"L3GD2000", (kernel_ulong_t) L3GD20_gyro_dev_name},
+ {"L3G40000", (kernel_ulong_t) L3G4IS_gyro_dev_name},
+ {"LSM3300", (kernel_ulong_t) LSM330_gyro_dev_name},
+ {}
+};
+
#ifdef CONFIG_OF
static const struct of_device_id st_gyro_of_match[] = {
{
@@ -67,7 +87,13 @@ static int st_gyro_i2c_probe(struct i2c_client *client,
return -ENOMEM;
gdata = iio_priv(indio_dev);
- st_sensors_of_i2c_probe(client, st_gyro_of_match);
+
+ if (ACPI_HANDLE(&client->dev)) {
+ err = st_sensors_acpi_i2c_probe(client, st_gyro_acpi_match);
+ if (err < 0)
+ return err;
+ } else
+ st_sensors_of_i2c_probe(client, st_gyro_of_match);
st_sensors_i2c_configure(indio_dev, client, gdata);
@@ -102,6 +128,7 @@ static struct i2c_driver st_gyro_driver = {
.owner = THIS_MODULE,
.name = "st-gyro-i2c",
.of_match_table = of_match_ptr(st_gyro_of_match),
+ .acpi_match_table = ACPI_PTR(st_gyro_acpi_match),
},
.probe = st_gyro_i2c_probe,
.remove = st_gyro_i2c_remove,
diff --git a/include/linux/iio/common/st_sensors_i2c.h b/include/linux/iio/common/st_sensors_i2c.h
index 1796af0..2e90b8f 100644
--- a/include/linux/iio/common/st_sensors_i2c.h
+++ b/include/linux/iio/common/st_sensors_i2c.h
@@ -28,4 +28,7 @@ static inline void st_sensors_of_i2c_probe(struct i2c_client *client,
}
#endif
+int st_sensors_acpi_i2c_probe(struct i2c_client *client,
+ const struct acpi_device_id *match);
+
#endif /* ST_SENSORS_I2C_H */
--
1.9.1
--
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