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Commit 3fc70077 authored by Joshua Clayton's avatar Joshua Clayton Committed by Linus Torvalds
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drivers/rtc/rtc-pcf2123.c: add support for devicetree 



Add compatible string "nxp,rtc-pcf2123"
Document the binding

Signed-off-by: default avatarJoshua Clayton <stillcompiling@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Grant Likely <grant.likely@linaro.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 69d54b91

Documentation/devicetree/bindings/rtc/nxp,rtc-2123.txt

0 → 100644
+16 −0
Original line number Diff line number Diff line 
NXP PCF2123 SPI Real Time Clock



Required properties:

- compatible: should be: "nxp,rtc-pcf2123"

- reg: should be the SPI slave chipselect address



Optional properties:

- spi-cs-high: PCF2123 needs chipselect high



Example:



rtc: nxp,rtc-pcf2123@3 {

	compatible = "nxp,rtc-pcf2123"

	reg = <3>

	spi-cs-high;

};

drivers/rtc/rtc-pcf2123.c

+10 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ 
#include <linux/errno.h>

#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/of.h>

#include <linux/string.h>

#include <linux/slab.h>

#include <linux/rtc.h>
@@ -340,10 +341,19 @@ static int pcf2123_remove(struct spi_device *spi) 
	return 0;

}



#ifdef CONFIG_OF

static const struct of_device_id pcf2123_dt_ids[] = {

	{ .compatible = "nxp,rtc-pcf2123", },

	{ /* sentinel */ }

};

MODULE_DEVICE_TABLE(of, pcf2123_dt_ids);

#endif



static struct spi_driver pcf2123_driver = {

	.driver	= {

			.name	= "rtc-pcf2123",

			.owner	= THIS_MODULE,

			.of_match_table = of_match_ptr(pcf2123_dt_ids),

	},

	.probe	= pcf2123_probe,

	.remove	= pcf2123_remove,