drivers/misc/lis3lv02d/lis3lv02d_i2c.c: add lis3lv02d device tree init
AnilKumar Ch [Wed, 26 Sep 2012 20:58:26 +0000 (13:58 -0700)]
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>

Documentation/devicetree/bindings/misc/lis302.txt
drivers/misc/lis3lv02d/lis3lv02d_i2c.c

index e18af9d..6def86f 100644 (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>;
+       };
+
index 2c0a114..60ec868 100644 (file)
 #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),