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rtc: mcp795: add devicetree support

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Add device tree support to the rtc-mcp795 driver.

Signed-off-by: Emil Bartczak <emilbart@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Emil Bartczak 2016-03-21 01:06:10 +01:00 committed by Alexandre Belloni
parent 15c6ea6f81
commit 7f8a58925b
2 changed files with 21 additions and 0 deletions
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11
Documentation/devicetree/bindings/rtc/maxim,mcp795.txt Normal file
View file

@ -0,0 +1,11 @@
* Maxim MCP795 SPI Serial Real-Time Clock
Required properties:
- compatible: Should contain "maxim,mcp795".
- reg: SPI address for chip
Example:
mcp795: rtc@0 {
compatible = "maxim,mcp795";
reg = <0>;
};

10
drivers/rtc/rtc-mcp795.c
View file

@ -20,6 +20,7 @@
#include <linux/printk.h>
#include <linux/spi/spi.h>
#include <linux/rtc.h>
#include <linux/of.h>
/* MCP795 Instructions, see datasheet table 3-1 */
#define MCP795_EEREAD 0x03
@ -183,9 +184,18 @@ static int mcp795_probe(struct spi_device *spi)
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id mcp795_of_match[] = {
{ .compatible = "maxim,mcp795" },
{ }
};
MODULE_DEVICE_TABLE(of, mcp795_of_match);
#endif
static struct spi_driver mcp795_driver = {
.driver = {
.name = "rtc-mcp795",
.of_match_table = of_match_ptr(mcp795_of_match),
},
.probe = mcp795_probe,
};