Commit 9c19b893 authored by Tin Huynh's avatar Tin Huynh Committed by Alexandre Belloni
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rtc: ds1307: Add ACPI support 



This patch enables ACPI support for rtc-ds1307 driver.

Signed-off-by: default avatarTin Huynh <tnhuynh@apm.com>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@free-electrons.com>
parent b88e0ae9

drivers/rtc/rtc-ds1307.c

+43 −9
Original line number Diff line number Diff line
@@ -11,6 +11,7 @@ 
 * published by the Free Software Foundation.

 */



#include <linux/acpi.h>

#include <linux/bcd.h>

#include <linux/i2c.h>

#include <linux/init.h>
@@ -191,6 +192,26 @@ static const struct i2c_device_id ds1307_id[] = { 
};

MODULE_DEVICE_TABLE(i2c, ds1307_id);



#ifdef CONFIG_ACPI

static const struct acpi_device_id ds1307_acpi_ids[] = {

	{ .id = "DS1307", .driver_data = ds_1307 },

	{ .id = "DS1337", .driver_data = ds_1337 },

	{ .id = "DS1338", .driver_data = ds_1338 },

	{ .id = "DS1339", .driver_data = ds_1339 },

	{ .id = "DS1388", .driver_data = ds_1388 },

	{ .id = "DS1340", .driver_data = ds_1340 },

	{ .id = "DS3231", .driver_data = ds_3231 },

	{ .id = "M41T00", .driver_data = m41t00 },

	{ .id = "MCP7940X", .driver_data = mcp794xx },

	{ .id = "MCP7941X", .driver_data = mcp794xx },

	{ .id = "PT7C4338", .driver_data = ds_1307 },

	{ .id = "RX8025", .driver_data = rx_8025 },

	{ .id = "ISL12057", .driver_data = ds_1337 },

	{ }

};

MODULE_DEVICE_TABLE(acpi, ds1307_acpi_ids);

#endif



/*----------------------------------------------------------------------*/



#define BLOCK_DATA_MAX_TRIES 10
@@ -874,7 +895,7 @@ static u8 do_trickle_setup_ds1339(struct i2c_client *client, 
	return setup;

}



static void ds1307_trickle_of_init(struct i2c_client *client,

static void ds1307_trickle_init(struct i2c_client *client,

				struct chip_desc *chip)

{

	uint32_t ohms = 0;
@@ -882,9 +903,9 @@ static void ds1307_trickle_of_init(struct i2c_client *client, 


	if (!chip->do_trickle_setup)

		goto out;

	if (of_property_read_u32(client->dev.of_node, "trickle-resistor-ohms" , &ohms))

	if (device_property_read_u32(&client->dev, "trickle-resistor-ohms", &ohms))

		goto out;

	if (of_property_read_bool(client->dev.of_node, "trickle-diode-disable"))

	if (device_property_read_bool(&client->dev, "trickle-diode-disable"))

		diode = false;

	chip->trickle_charger_setup = chip->do_trickle_setup(client,

							     ohms, diode);
@@ -1268,7 +1289,7 @@ static int ds1307_probe(struct i2c_client *client, 
	struct ds1307		*ds1307;

	int			err = -ENODEV;

	int			tmp, wday;

	struct chip_desc	*chip = &chips[id->driver_data];

	struct chip_desc	*chip;

	struct i2c_adapter	*adapter = to_i2c_adapter(client->dev.parent);

	bool			want_irq = false;

	bool			ds1307_can_wakeup_device = false;
@@ -1297,11 +1318,23 @@ static int ds1307_probe(struct i2c_client *client, 
	i2c_set_clientdata(client, ds1307);



	ds1307->client	= client;

	if (id) {

		chip = &chips[id->driver_data];

		ds1307->type = id->driver_data;

	} else {

		const struct acpi_device_id *acpi_id;



		acpi_id = acpi_match_device(ACPI_PTR(ds1307_acpi_ids),

					    &client->dev);

		if (!acpi_id)

			return -ENODEV;

		chip = &chips[acpi_id->driver_data];

		ds1307->type = acpi_id->driver_data;

	}



	if (!pdata && client->dev.of_node)

		ds1307_trickle_of_init(client, chip);

	else if (pdata && pdata->trickle_charger_setup)

	if (!pdata)

		ds1307_trickle_init(client, chip);

	else if (pdata->trickle_charger_setup)

		chip->trickle_charger_setup = pdata->trickle_charger_setup;



	if (chip->trickle_charger_setup && chip->trickle_charger_reg) {
@@ -1678,6 +1711,7 @@ static int ds1307_remove(struct i2c_client *client) 
static struct i2c_driver ds1307_driver = {

	.driver = {

		.name	= "rtc-ds1307",

		.acpi_match_table = ACPI_PTR(ds1307_acpi_ids),

	},

	.probe		= ds1307_probe,

	.remove		= ds1307_remove,