rtc: m41t80: remove sqw sysfs entry

In order to use the proper clock framework to control this feature.

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 1e8ba7a469ac9f63cc94925e47e7adc75d684103..6145bc164162266aceaa388552853d69287f8d1d 100644 (file)
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -446,96 +446,8 @@ 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,
 };