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drivers/misc/lis3lv02d/lis3lv02d_i2c.c: add lis3lv02d device tree init 

Add lis3lv02d device tree initialization code/API to take pdata from
device node.  Also adds device tree init matching table support to
lis3lv02d_i2c driver.  If the driver data is passed from device tree, then
this driver picks up platform data from device node through common/generic
lis3lv02d.c driver.

[akpm@linux-foundation.org: fix CONFIG_OF=n build]
Signed-off-by: AnilKumar Ch <anilkumar@ti.com>
Cc: Eric Piel <eric.piel@tremplin-utc.net>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
AnilKumar Ch 2012-09-26 13:58:26 -07:00 committed by Greg Kroah-Hartman
parent 79df8d27d9
commit 5dc2db05f2
2 changed files with 59 additions and 0 deletions
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36
Documentation/devicetree/bindings/misc/lis302.txt
View File

@ -11,6 +11,12 @@ Required properties for the SPI bindings:
constrained by external circuitry
- interrupts: the interrupt generated by the device
Required properties for the I2C bindings:
- compatible: should be set to "st,lis3lv02d"
- reg: i2c slave address
- Vdd-supply: The input supply for Vdd
- Vdd_IO-supply: The input supply for Vdd_IO
Optional properties for all bus drivers:
@ -74,3 +80,33 @@ Example for a SPI device node:
st,wakeup-z-hi;
};
Example for a I2C device node:
lis331dlh: lis331dlh@18 {
compatible = "st,lis331dlh", "st,lis3lv02d";
reg = <0x18>;
Vdd-supply = <&lis3_reg>;
Vdd_IO-supply = <&lis3_reg>;
st,click-single-x;
st,click-single-y;
st,click-single-z;
st,click-thresh-x = <10>;
st,click-thresh-y = <10>;
st,click-thresh-z = <10>;
st,irq1-click;
st,irq2-click;
st,wakeup-x-lo;
st,wakeup-x-hi;
st,wakeup-y-lo;
st,wakeup-y-hi;
st,wakeup-z-lo;
st,wakeup-z-hi;
st,min-limit-x = <120>;
st,min-limit-y = <120>;
st,min-limit-z = <140>;
st,max-limit-x = <550>;
st,max-limit-y = <550>;
st,max-limit-z = <750>;
};

23
drivers/misc/lis3lv02d/lis3lv02d_i2c.c
View File

@ -31,6 +31,10 @@
#include <linux/i2c.h>
#include <linux/pm_runtime.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_device.h>
#include "lis3lv02d.h"
#define DRV_NAME "lis3lv02d_i2c"
@ -102,12 +106,30 @@ static int lis3_i2c_init(struct lis3lv02d *lis3)
static union axis_conversion lis3lv02d_axis_map =
{ .as_array = { LIS3_DEV_X, LIS3_DEV_Y, LIS3_DEV_Z } };
#ifdef CONFIG_OF
static struct of_device_id lis3lv02d_i2c_dt_ids[] = {
{ .compatible = "st,lis3lv02d" },
{}
};
MODULE_DEVICE_TABLE(of, lis3lv02d_i2c_dt_ids);
#endif
static int __devinit lis3lv02d_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
int ret = 0;
struct lis3lv02d_platform_data *pdata = client->dev.platform_data;
#ifdef CONFIG_OF
if (of_match_device(lis3lv02d_i2c_dt_ids, &client->dev)) {
lis3_dev.of_node = client->dev.of_node;
ret = lis3lv02d_init_dt(&lis3_dev);
if (ret)
return ret;
pdata = lis3_dev.pdata;
}
#endif
if (pdata) {
if ((pdata->driver_features & LIS3_USE_BLOCK_READ) &&
(i2c_check_functionality(client->adapter,
@ -255,6 +277,7 @@ static struct i2c_driver lis3lv02d_i2c_driver = {
.name = DRV_NAME,
.owner = THIS_MODULE,
.pm = &lis3_pm_ops,
.of_match_table = of_match_ptr(lis3lv02d_i2c_dt_ids),
},
.probe = lis3lv02d_i2c_probe,
.remove = __devexit_p(lis3lv02d_i2c_remove),