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i2c: pmcmsp: 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>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Wolfram Sang 2018-07-23 22:26:09 +02:00 committed by Wolfram Sang
parent aa14b12470
commit 22dda3e4f8
1 changed files with 1 additions and 16 deletions
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17
drivers/i2c/busses/i2c-pmcmsp.c
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@ -444,16 +444,6 @@ static enum pmcmsptwi_xfer_result pmcmsptwi_xfer_cmd(
{
enum pmcmsptwi_xfer_result retval;
if ((cmd->type == MSP_TWI_CMD_WRITE && cmd->write_len == 0) ||
(cmd->type == MSP_TWI_CMD_READ && cmd->read_len == 0) ||
(cmd->type == MSP_TWI_CMD_WRITE_READ &&
(cmd->read_len == 0 || cmd->write_len == 0))) {
dev_err(&pmcmsptwi_adapter.dev,
"%s: Cannot transfer less than 1 byte\n",
__func__);
return -EINVAL;
}
mutex_lock(&data->lock);
dev_dbg(&pmcmsptwi_adapter.dev,
"Setting address to 0x%04x\n", cmd->addr);
@ -532,11 +522,6 @@ static int pmcmsptwi_master_xfer(struct i2c_adapter *adap,
cmd.write_data = msg->buf;
}
if (msg->len == 0) {
dev_err(&adap->dev, "Zero-byte messages unsupported\n");
return -EINVAL;
}
cmd.addr = msg->addr;
if (msg->flags & I2C_M_TEN) {
@ -578,7 +563,7 @@ static u32 pmcmsptwi_i2c_func(struct i2c_adapter *adapter)
}
static const struct i2c_adapter_quirks pmcmsptwi_i2c_quirks = {
.flags = I2C_AQ_COMB_WRITE_THEN_READ,
.flags = I2C_AQ_COMB_WRITE_THEN_READ | I2C_AQ_NO_ZERO_LEN,
.max_write_len = MSP_MAX_BYTES_PER_RW,
.max_read_len = MSP_MAX_BYTES_PER_RW,
.max_comb_1st_msg_len = MSP_MAX_BYTES_PER_RW,