In order to use the proper clock framework to control this feature.
Signed-off-by: Gary Bisson <[email protected]>
---
drivers/rtc/rtc-m41t80.c | 88 ------------------------------------------------
1 file changed, 88 deletions(-)
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 0c142653c309..2bdf494a9bd4 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -387,96 +387,8 @@ static ssize_t flags_show(struct device *dev,
}
static DEVICE_ATTR_RO(flags);
-static ssize_t sqwfreq_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct m41t80_data *clientdata = i2c_get_clientdata(client);
- int val, reg_sqw;
-
- if (!(clientdata->features & M41T80_FEATURE_SQ))
- return -EINVAL;
-
- reg_sqw = M41T80_REG_SQW;
- if (clientdata->features & M41T80_FEATURE_SQ_ALT)
- reg_sqw = M41T80_REG_WDAY;
- val = i2c_smbus_read_byte_data(client, reg_sqw);
- if (val < 0)
- return val;
- val = (val >> 4) & 0xf;
- switch (val) {
- case 0:
- break;
- case 1:
- val = 32768;
- break;
- default:
- val = 32768 >> val;
- }
- return sprintf(buf, "%d\n", val);
-}
-
-static ssize_t sqwfreq_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct m41t80_data *clientdata = i2c_get_clientdata(client);
- int almon, sqw, reg_sqw, rc;
- unsigned long val;
-
- rc = kstrtoul(buf, 0, &val);
- if (rc < 0)
- return rc;
-
- if (!(clientdata->features & M41T80_FEATURE_SQ))
- return -EINVAL;
-
- if (val) {
- if (!is_power_of_2(val))
- return -EINVAL;
- val = ilog2(val);
- if (val == 15)
- val = 1;
- else if (val < 14)
- val = 15 - val;
- else
- return -EINVAL;
- }
- /* disable SQW, set SQW frequency & re-enable */
- almon = i2c_smbus_read_byte_data(client, M41T80_REG_ALARM_MON);
- if (almon < 0)
- return almon;
- reg_sqw = M41T80_REG_SQW;
- if (clientdata->features & M41T80_FEATURE_SQ_ALT)
- reg_sqw = M41T80_REG_WDAY;
- sqw = i2c_smbus_read_byte_data(client, reg_sqw);
- if (sqw < 0)
- return sqw;
- sqw = (sqw & 0x0f) | (val << 4);
-
- rc = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON,
- almon & ~M41T80_ALMON_SQWE);
- if (rc < 0)
- return rc;
-
- if (val) {
- rc = i2c_smbus_write_byte_data(client, reg_sqw, sqw);
- if (rc < 0)
- return rc;
-
- rc = i2c_smbus_write_byte_data(client, M41T80_REG_ALARM_MON,
- almon | M41T80_ALMON_SQWE);
- if (rc < 0)
- return rc;
- }
- return count;
-}
-static DEVICE_ATTR_RW(sqwfreq);
-
static struct attribute *attrs[] = {
&dev_attr_flags.attr,
- &dev_attr_sqwfreq.attr,
NULL,
};
--
2.11.0
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