new file mode 100644
@@ -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;
+};
@@ -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,
Add compatible string "nxp,rtc-pcf2123" Document the binding Signed-off-by: Joshua Clayton <stillcompiling@gmail.com> --- Documentation/devicetree/bindings/rtc/nxp,rtc-2123.txt | 16 ++++++++++++++++ drivers/rtc/rtc-pcf2123.c | 10 ++++++++++ 2 files changed, 26 insertions(+) create mode 100644 Documentation/devicetree/bindings/rtc/nxp,rtc-2123.txt