drivers/rtc/rtc-pcf2123.c: add support for devicetree

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

Signed-off-by: Joshua 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joshua Clayton 2015-02-13 14:40:29 -08:00 коммит произвёл Linus Torvalds
Родитель 69d54b916d
Коммит 3fc70077e6
2 изменённых файлов: 26 добавлений и 0 удалений

Просмотреть файл

@ -0,0 +1,16 @@
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;
};

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@ -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,