Commit a1dc86eb authored by Rabin Vincent's avatar Rabin Vincent Committed by Guenter Roeck
Browse files

hwmon: (lm70) add device tree support 



Allow the lm70 to be probed from a device tree.

Signed-off-by: default avatarRabin Vincent <rabin@rab.in>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent aeaa4d9f

Documentation/devicetree/bindings/hwmon/lm70.txt

0 → 100644
+21 −0
Original line number Diff line number Diff line 
* LM70/TMP121/LM71/LM74 thermometer.



Required properties:

- compatible: one of

		"ti,lm70"

		"ti,tmp121"

		"ti,lm71"

		"ti,lm74"



See Documentation/devicetree/bindings/spi/spi-bus.txt for more required and

optional properties.



Example:



spi_master {

	temperature-sensor@0 {

		compatible = "ti,lm70";

		reg = <0>;

		spi-max-frequency = <1000000>;

	};

};

drivers/hwmon/lm70.c

+33 −1
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ 
#include <linux/mod_devicetable.h>

#include <linux/spi/spi.h>

#include <linux/slab.h>

#include <linux/of_device.h>





#define DRVNAME		"lm70"
@@ -130,11 +131,41 @@ ATTRIBUTE_GROUPS(lm70); 


/*----------------------------------------------------------------------*/



#ifdef CONFIG_OF

static const struct of_device_id lm70_of_ids[] = {

	{

		.compatible = "ti,lm70",

		.data = (void *) LM70_CHIP_LM70,

	},

	{

		.compatible = "ti,tmp121",

		.data = (void *) LM70_CHIP_TMP121,

	},

	{

		.compatible = "ti,lm71",

		.data = (void *) LM70_CHIP_LM71,

	},

	{

		.compatible = "ti,lm74",

		.data = (void *) LM70_CHIP_LM74,

	},

	{},

};

MODULE_DEVICE_TABLE(of, lm70_of_ids);

#endif



static int lm70_probe(struct spi_device *spi)

{

	int chip = spi_get_device_id(spi)->driver_data;

	const struct of_device_id *match;

	struct device *hwmon_dev;

	struct lm70 *p_lm70;

	int chip;



	match = of_match_device(lm70_of_ids, &spi->dev);

	if (match)

		chip = (int)(uintptr_t)match->data;

	else

		chip = spi_get_device_id(spi)->driver_data;



	/* signaling is SPI_MODE_0 */

	if (spi->mode & (SPI_CPOL | SPI_CPHA))
@@ -169,6 +200,7 @@ static struct spi_driver lm70_driver = { 
	.driver = {

		.name	= "lm70",

		.owner	= THIS_MODULE,

		.of_match_table	= of_match_ptr(lm70_of_ids),

	},

	.id_table = lm70_ids,

	.probe	= lm70_probe,