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authorJoshua Clayton <stillcompiling@gmail.com>2015-02-14 01:40:29 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-14 08:21:42 +0300
commit3fc70077e6a9feec7ec080710677a507bd41322c (patch)
treeec7f8ab4ac01ecc75f8ad411cfaae37ec54087b6
parent69d54b916d83872a0a327778a01af2a096923f59 (diff)
downloadlinux-3fc70077e6a9feec7ec080710677a507bd41322c.tar.xz
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>
-rw-r--r--Documentation/devicetree/bindings/rtc/nxp,rtc-2123.txt16
-rw-r--r--drivers/rtc/rtc-pcf2123.c10
2 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/rtc/nxp,rtc-2123.txt b/Documentation/devicetree/bindings/rtc/nxp,rtc-2123.txt
new file mode 100644
index 000000000000..5cbc0b145a61
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/nxp,rtc-2123.txt
@@ -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;
+};
diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c
index d1953bb244c5..8a7556cbcb7f 100644
--- a/drivers/rtc/rtc-pcf2123.c
+++ b/drivers/rtc/rtc-pcf2123.c
@@ -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,