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iio: dac: mcp4725: Add dac_reg_offset to struct mcp4725_chip_info

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The MCP4725 has a register offset '3' for reading DAC value compared to
'4' for MCP4726. Add dac_reg_offset variable to struct mcp4725_chip_info
to handle this difference.

Drop chip_id from struct mcp4725_chip_info as it is unused.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20230903115548.59306-5-biju.das.jz@bp.renesas.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Biju Das 2023-09-03 12:55:48 +01:00 committed by Jonathan Cameron
parent 155da070b4
commit c377e2febd
1 changed files with 4 additions and 4 deletions
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8
drivers/iio/dac/mcp4725.c
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@ -32,7 +32,7 @@
struct mcp4725_chip_info {
const struct iio_chan_spec *chan_spec;
unsigned int chip_id;
u8 dac_reg_offset;
bool use_ext_ref_voltage;
};
@ -463,7 +463,7 @@ static int mcp4725_probe(struct i2c_client *client)
indio_dev->modes = INDIO_DIRECT_MODE;
/* read current DAC value and settings */
err = i2c_master_recv(client, inbuf, info->chip_id == MCP4725 ? 3 : 4);
err = i2c_master_recv(client, inbuf, info->dac_reg_offset);
if (err < 0) {
dev_err(&client->dev, "failed to read DAC value");
@ -515,13 +515,13 @@ static void mcp4725_remove(struct i2c_client *client)
static const struct mcp4725_chip_info mcp4725 = {
.chan_spec = &mcp472x_channel[MCP4725],
.chip_id = MCP4725,
.dac_reg_offset = 3,
.use_ext_ref_voltage = true,
};
static const struct mcp4725_chip_info mcp4726 = {
.chan_spec = &mcp472x_channel[MCP4726],
.chip_id = MCP4726,
.dac_reg_offset = 4,
};
static const struct i2c_device_id mcp4725_id[] = {