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drivers/rtc/rtc-isl12022.c: device tree support

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Add support for configuring the ISL12022 real-time clock via the Device
tree framework.  This is based on what I've seen in the related ISL12057
driver, it has been tested and works on a Technologic Systems TS-7670
device which uses a ISL12020 RTC device, my device tree looks like this:

	apbx@80040000 {
		i2c0: i2c@80058000 {
			pinctrl-names = "default";
			pinctrl-0 = <&i2c0_pins_a>;
			clock-frequency = <400000>;
			status = "okay";

			isl12022@0x6f {
				compatible = "isl,isl12022";
				reg = <0x6f>;
			};
		};
		... etc
	};

Signed-off-by: Stuart Longland <stuartl@vrt.com.au>
Cc: Roman Fietze <roman.fietze@telemotive.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Stuart Longland 2014-08-08 14:20:20 -07:00 committed by Linus Torvalds
parent ede3e9d47c
commit db04d6284e
1 changed files with 12 additions and 0 deletions
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12
drivers/rtc/rtc-isl12022.c
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@ -17,6 +17,8 @@
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_device.h>
#define DRV_VERSION "0.1"
@ -271,6 +273,13 @@ static int isl12022_probe(struct i2c_client *client,
return PTR_ERR_OR_ZERO(isl12022->rtc);
}
#ifdef CONFIG_OF
static struct of_device_id isl12022_dt_match[] = {
{ .compatible = "isl,isl12022" },
{ },
};
#endif
static const struct i2c_device_id isl12022_id[] = {
{ "isl12022", 0 },
{ }
@ -280,6 +289,9 @@ MODULE_DEVICE_TABLE(i2c, isl12022_id);
static struct i2c_driver isl12022_driver = {
.driver = {
.name = "rtc-isl12022",
#ifdef CONFIG_OF
.of_match_table = of_match_ptr(isl12022_dt_match),
#endif
},
.probe = isl12022_probe,
.id_table = isl12022_id,