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i2c: designware-master: use core to detect 'no zero length' quirk

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And don't reimplement in the driver.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2018-07-23 22:26:06 +02:00 committed by Wolfram Sang
parent d9cfe2ce24
commit 40fce52170
1 changed files with 5 additions and 7 deletions
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12
drivers/i2c/busses/i2c-designware-master.c
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@ -274,13 +274,6 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
break;
}
if (msgs[dev->msg_write_idx].len == 0) {
dev_err(dev->dev,
"%s: invalid message length\n", __func__);
dev->msg_err = -EINVAL;
break;
}
if (!(dev->status & STATUS_WRITE_IN_PROGRESS)) {
/* new i2c_msg */
buf = msgs[dev->msg_write_idx].buf;
@ -523,6 +516,10 @@ static const struct i2c_algorithm i2c_dw_algo = {
.functionality = i2c_dw_func,
};
static const struct i2c_adapter_quirks i2c_dw_quirks = {
.flags = I2C_AQ_NO_ZERO_LEN,
};
static u32 i2c_dw_read_clear_intrbits(struct dw_i2c_dev *dev)
{
u32 stat;
@ -718,6 +715,7 @@ int i2c_dw_probe(struct dw_i2c_dev *dev)
"Synopsys DesignWare I2C adapter");
adap->retries = 3;
adap->algo = &i2c_dw_algo;
adap->quirks = &i2c_dw_quirks;
adap->dev.parent = dev->dev;
i2c_set_adapdata(adap, dev);