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i2c: designware-master: use core to detect 'no zero length' quirk
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>
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@ -274,13 +274,6 @@ i2c_dw_xfer_msg(struct dw_i2c_dev *dev)
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break;
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}
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if (msgs[dev->msg_write_idx].len == 0) {
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dev_err(dev->dev,
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"%s: invalid message length\n", __func__);
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dev->msg_err = -EINVAL;
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break;
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}
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if (!(dev->status & STATUS_WRITE_IN_PROGRESS)) {
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/* new i2c_msg */
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buf = msgs[dev->msg_write_idx].buf;
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@ -523,6 +516,10 @@ static const struct i2c_algorithm i2c_dw_algo = {
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.functionality = i2c_dw_func,
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};
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static const struct i2c_adapter_quirks i2c_dw_quirks = {
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.flags = I2C_AQ_NO_ZERO_LEN,
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};
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static u32 i2c_dw_read_clear_intrbits(struct dw_i2c_dev *dev)
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{
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u32 stat;
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@ -718,6 +715,7 @@ int i2c_dw_probe(struct dw_i2c_dev *dev)
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"Synopsys DesignWare I2C adapter");
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adap->retries = 3;
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adap->algo = &i2c_dw_algo;
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adap->quirks = &i2c_dw_quirks;
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adap->dev.parent = dev->dev;
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i2c_set_adapdata(adap, dev);
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