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i2c: rcar: 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: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2018-07-23 22:26:14 +02:00 committed by Wolfram Sang
parent 5314355a91
commit 3ef3e5cd72
1 changed files with 6 additions and 7 deletions
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13
drivers/i2c/busses/i2c-rcar.c
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@ -796,14 +796,8 @@ static int rcar_i2c_master_xfer(struct i2c_adapter *adap,
if (ret < 0)
goto out;
for (i = 0; i < num; i++) {
/* This HW can't send STOP after address phase */
if (msgs[i].len == 0) {
ret = -EOPNOTSUPP;
goto out;
}
for (i = 0; i < num; i++)
rcar_i2c_request_dma(priv, msgs + i);
}
/* init first message */
priv->msg = msgs;
@ -890,6 +884,10 @@ static const struct i2c_algorithm rcar_i2c_algo = {
.unreg_slave = rcar_unreg_slave,
};
static const struct i2c_adapter_quirks rcar_i2c_quirks = {
.flags = I2C_AQ_NO_ZERO_LEN,
};
static const struct of_device_id rcar_i2c_dt_ids[] = {
{ .compatible = "renesas,i2c-r8a7778", .data = (void *)I2C_RCAR_GEN1 },
{ .compatible = "renesas,i2c-r8a7779", .data = (void *)I2C_RCAR_GEN1 },
@ -943,6 +941,7 @@ static int rcar_i2c_probe(struct platform_device *pdev)
adap->dev.parent = dev;
adap->dev.of_node = dev->of_node;
adap->bus_recovery_info = &rcar_i2c_bri;
adap->quirks = &rcar_i2c_quirks;
i2c_set_adapdata(adap, priv);
strlcpy(adap->name, pdev->name, sizeof(adap->name));