Commit 78aaa06d authored by Alexandre Belloni's avatar Alexandre Belloni
Browse files

rtc: ds1307: add Intersil ISL12057 support 



Intersil ISL12057 is a drop-in replacement for DS1337. It can be supported
by the ds1307 driver.

Acked-by: default avatarArnaud Ebalard <arno@natisbad.org>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
parent 50d6c0ea

drivers/rtc/Kconfig

+4 −4
Original line number Diff line number Diff line
@@ -208,14 +208,14 @@ config RTC_DRV_AS3722 
	  will be called rtc-as3722.



config RTC_DRV_DS1307

	tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025"

	tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025, ISL12057"

	help

	  If you say yes here you get support for various compatible RTC

	  chips (often with battery backup) connected with I2C. This driver

	  should handle DS1307, DS1337, DS1338, DS1339, DS1340, ST M41T00,

	  EPSON RX-8025 and probably other chips. In some cases the RTC

	  must already have been initialized (by manufacturing or a

	  bootloader).

	  EPSON RX-8025, Intersil ISL12057 and probably other chips. In some

	  cases the RTC must already have been initialized (by manufacturing or

	  a bootloader).



	  The first seven registers on these chips hold an RTC, and other

	  registers may add features such as NVRAM, a trickle charger for

drivers/rtc/rtc-ds1307.c

+6 −0
Original line number Diff line number Diff line
@@ -186,6 +186,7 @@ static const struct i2c_device_id ds1307_id[] = { 
	{ "mcp7941x", mcp794xx },

	{ "pt7c4338", ds_1307 },

	{ "rx8025", rx_8025 },

	{ "isl12057", ds_1337 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, ds1307_id);
@@ -1333,6 +1334,11 @@ static int ds1307_probe(struct i2c_client *client, 
	if (of_property_read_bool(client->dev.of_node, "wakeup-source")) {

		ds1307_can_wakeup_device = true;

	}

	/* Intersil ISL12057 DT backward compatibility */

	if (of_property_read_bool(client->dev.of_node,

				  "isil,irq2-can-wakeup-machine")) {

		ds1307_can_wakeup_device = true;

	}

#endif



	switch (ds1307->type) {