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rtc: Add MAX8998 rtc driver

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This adds support for the RTC provided by the Maxim 8998 chip. This
driver was tested on a GONI board by using the rtc-test application from
the Documentation/rtc.txt.

Signed-off-by: Joonyoung Shim <[email protected]>
Signed-off-by: Kyungmin Park <[email protected]>
Acked-by: Alessandro Zummo <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
This commit is contained in:
Joonyoung Shim 2010-08-06 11:28:08 +09:00 • committed by Samuel Ortiz
commit 9b16c0a43b
5 changed files with 339 additions and 2 deletions
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24
drivers/mfd/max8998.c
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@ -30,10 +30,14 @@
#include <linux/mfd/max8998.h>
#include <linux/mfd/max8998-private.h>
#define RTC_I2C_ADDR (0x0c >> 1)
static struct mfd_cell max8998_devs[] = {
{
.name = "max8998-pmic",
}
}, {
.name = "max8998-rtc",
},
};
int max8998_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
@ -80,6 +84,21 @@ int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
}
EXPORT_SYMBOL(max8998_write_reg);
int max8998_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
{
struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8998->iolock);
ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
mutex_unlock(&max8998->iolock);
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL(max8998_bulk_write);
int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
{
struct max8998_dev *max8998 = i2c_get_clientdata(i2c);
@ -120,6 +139,9 @@ static int max8998_i2c_probe(struct i2c_client *i2c,
}
mutex_init(&max8998->iolock);
max8998->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
i2c_set_clientdata(max8998->rtc, max8998);
max8998_irq_init(max8998);
ret = mfd_add_devices(max8998->dev, -1,