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>
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Documentation/devicetree/bindings/rtc/nxp,rtc-2123.txt
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16
Documentation/devicetree/bindings/rtc/nxp,rtc-2123.txt
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@ -0,0 +1,16 @@
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NXP PCF2123 SPI Real Time Clock
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Required properties:
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- compatible: should be: "nxp,rtc-pcf2123"
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- reg: should be the SPI slave chipselect address
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Optional properties:
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- spi-cs-high: PCF2123 needs chipselect high
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Example:
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rtc: nxp,rtc-pcf2123@3 {
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compatible = "nxp,rtc-pcf2123"
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reg = <3>
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spi-cs-high;
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};
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@ -38,6 +38,7 @@
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/string.h>
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#include <linux/slab.h>
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#include <linux/rtc.h>
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@ -340,10 +341,19 @@ static int pcf2123_remove(struct spi_device *spi)
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id pcf2123_dt_ids[] = {
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{ .compatible = "nxp,rtc-pcf2123", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, pcf2123_dt_ids);
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#endif
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static struct spi_driver pcf2123_driver = {
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.driver = {
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.name = "rtc-pcf2123",
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.owner = THIS_MODULE,
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.of_match_table = of_match_ptr(pcf2123_dt_ids),
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},
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.probe = pcf2123_probe,
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.remove = pcf2123_remove,
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