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Subject[PATCH 1/2] iio: dac: mcp4922: add support to mcp4921
Date
Add support to mcp4921 which has only one output channel.

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
---
drivers/iio/dac/mcp4922.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/iio/dac/mcp4922.c b/drivers/iio/dac/mcp4922.c
index cb9e60e71b91..0d41c0f25515 100644
--- a/drivers/iio/dac/mcp4922.c
+++ b/drivers/iio/dac/mcp4922.c
@@ -17,10 +17,12 @@
#include <linux/bitops.h>

#define MCP4922_NUM_CHANNELS 2
+#define MCP4921_NUM_CHANNELS 1

enum mcp4922_supported_device_ids {
ID_MCP4902,
ID_MCP4912,
+ ID_MCP4921,
ID_MCP4922,
};

@@ -105,9 +107,10 @@ static int mcp4922_write_raw(struct iio_dev *indio_dev,
}
}

-static const struct iio_chan_spec mcp4922_channels[3][MCP4922_NUM_CHANNELS] = {
+static const struct iio_chan_spec mcp4922_channels[4][MCP4922_NUM_CHANNELS] = {
[ID_MCP4902] = { MCP4922_CHAN(0, 8), MCP4922_CHAN(1, 8) },
[ID_MCP4912] = { MCP4922_CHAN(0, 10), MCP4922_CHAN(1, 10) },
+ [ID_MCP4921] = { MCP4922_CHAN(0, 12), {} },
[ID_MCP4922] = { MCP4922_CHAN(0, 12), MCP4922_CHAN(1, 12) },
};

@@ -154,7 +157,10 @@ static int mcp4922_probe(struct spi_device *spi)
indio_dev->info = &mcp4922_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = mcp4922_channels[id->driver_data];
- indio_dev->num_channels = MCP4922_NUM_CHANNELS;
+ if (id->driver_data == ID_MCP4921)
+ indio_dev->num_channels = MCP4921_NUM_CHANNELS;
+ else
+ indio_dev->num_channels = MCP4922_NUM_CHANNELS;
indio_dev->name = id->name;

ret = iio_device_register(indio_dev);
@@ -185,6 +191,7 @@ static void mcp4922_remove(struct spi_device *spi)
static const struct spi_device_id mcp4922_id[] = {
{"mcp4902", ID_MCP4902},
{"mcp4912", ID_MCP4912},
+ {"mcp4921", ID_MCP4921},
{"mcp4922", ID_MCP4922},
{}
};
--
2.25.1
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