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rtc: ds1672: move oscillator handling to .read_time
Return -EINVAL when trying to read an invalid time instead of just probe because this is a useful information for userspace. Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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parent
d1fbe695d8
commit
10e3efc165
@ -29,7 +29,7 @@
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static int ds1672_get_datetime(struct i2c_client *client, struct rtc_time *tm)
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{
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unsigned long time;
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unsigned char addr = DS1672_REG_CNT_BASE;
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unsigned char addr = DS1672_REG_CONTROL;
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unsigned char buf[4];
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struct i2c_msg msgs[] = {
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@ -41,11 +41,25 @@ static int ds1672_get_datetime(struct i2c_client *client, struct rtc_time *tm)
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{/* read date */
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.addr = client->addr,
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.flags = I2C_M_RD,
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.len = 4,
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.len = 1,
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.buf = buf
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},
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};
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/* read control register */
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if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
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dev_warn(&client->dev, "Unable to read the control register\n");
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return -EIO;
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}
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if (buf[0] & DS1672_REG_CONTROL_EOSC) {
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dev_warn(&client->dev, "Oscillator not enabled. Set time to enable.\n");
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return -EINVAL;
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}
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addr = DS1672_REG_CNT_BASE;
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msgs[1].len = 4;
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/* read date registers */
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if ((i2c_transfer(client->adapter, &msgs[0], 2)) != 2) {
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dev_err(&client->dev, "%s: read error\n", __func__);
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@ -154,7 +168,6 @@ static int ds1672_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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int err = 0;
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u8 control;
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struct rtc_device *rtc;
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dev_dbg(&client->dev, "%s\n", __func__);
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@ -178,16 +191,6 @@ static int ds1672_probe(struct i2c_client *client,
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i2c_set_clientdata(client, rtc);
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/* read control register */
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err = ds1672_get_control(client, &control);
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if (err) {
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dev_warn(&client->dev, "Unable to read the control register\n");
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}
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if (control & DS1672_REG_CONTROL_EOSC)
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dev_warn(&client->dev, "Oscillator not enabled. "
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"Set time to enable.\n");
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/* Register sysfs hooks */
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err = device_create_file(&client->dev, &dev_attr_control);
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if (err)
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