i2c: designware-master: use core to detect 'no zero length' quirk (40fce521) · Commits · 戴 / test

And don't reimplement in the driver. Signed-off-by:

drivers/i2c/busses/i2c-designware-master.c

+5 −7

Original line number	Diff line number	Diff line
		@@ -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);