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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
commitd635711daa98be86d4c7fd01499c34f566b54ccb (patch)
treeaa5cc3760a27c3d57146498cb82fa549547de06c /drivers/iio/dac/mcp4725.c
parentc91265cd0efb83778f015b4d4b1129bd2cfd075e (diff)
Linux-libre 4.6.2-gnu
Diffstat (limited to 'drivers/iio/dac/mcp4725.c')
-rw-r--r--drivers/iio/dac/mcp4725.c87
1 files changed, 67 insertions, 20 deletions
diff --git a/drivers/iio/dac/mcp4725.c b/drivers/iio/dac/mcp4725.c
index b4dde8315..cca935c06 100644
--- a/drivers/iio/dac/mcp4725.c
+++ b/drivers/iio/dac/mcp4725.c
@@ -1,5 +1,5 @@
/*
- * mcp4725.c - Support for Microchip MCP4725
+ * mcp4725.c - Support for Microchip MCP4725/6
*
* Copyright (C) 2012 Peter Meerwald <pmeerw@pmeerw.net>
*
@@ -134,6 +134,12 @@ static const char * const mcp4725_powerdown_modes[] = {
"500kohm_to_gnd"
};
+static const char * const mcp4726_powerdown_modes[] = {
+ "1kohm_to_gnd",
+ "125kohm_to_gnd",
+ "640kohm_to_gnd"
+};
+
static int mcp4725_get_powerdown_mode(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
@@ -182,11 +188,24 @@ static ssize_t mcp4725_write_powerdown(struct iio_dev *indio_dev,
return len;
}
-static const struct iio_enum mcp4725_powerdown_mode_enum = {
- .items = mcp4725_powerdown_modes,
- .num_items = ARRAY_SIZE(mcp4725_powerdown_modes),
- .get = mcp4725_get_powerdown_mode,
- .set = mcp4725_set_powerdown_mode,
+enum {
+ MCP4725,
+ MCP4726,
+};
+
+static const struct iio_enum mcp472x_powerdown_mode_enum[] = {
+ [MCP4725] = {
+ .items = mcp4725_powerdown_modes,
+ .num_items = ARRAY_SIZE(mcp4725_powerdown_modes),
+ .get = mcp4725_get_powerdown_mode,
+ .set = mcp4725_set_powerdown_mode,
+ },
+ [MCP4726] = {
+ .items = mcp4726_powerdown_modes,
+ .num_items = ARRAY_SIZE(mcp4726_powerdown_modes),
+ .get = mcp4725_get_powerdown_mode,
+ .set = mcp4725_set_powerdown_mode,
+ },
};
static const struct iio_chan_spec_ext_info mcp4725_ext_info[] = {
@@ -196,19 +215,46 @@ static const struct iio_chan_spec_ext_info mcp4725_ext_info[] = {
.write = mcp4725_write_powerdown,
.shared = IIO_SEPARATE,
},
- IIO_ENUM("powerdown_mode", IIO_SEPARATE, &mcp4725_powerdown_mode_enum),
- IIO_ENUM_AVAILABLE("powerdown_mode", &mcp4725_powerdown_mode_enum),
+ IIO_ENUM("powerdown_mode", IIO_SEPARATE,
+ &mcp472x_powerdown_mode_enum[MCP4725]),
+ IIO_ENUM_AVAILABLE("powerdown_mode",
+ &mcp472x_powerdown_mode_enum[MCP4725]),
+ { },
+};
+
+static const struct iio_chan_spec_ext_info mcp4726_ext_info[] = {
+ {
+ .name = "powerdown",
+ .read = mcp4725_read_powerdown,
+ .write = mcp4725_write_powerdown,
+ .shared = IIO_SEPARATE,
+ },
+ IIO_ENUM("powerdown_mode", IIO_SEPARATE,
+ &mcp472x_powerdown_mode_enum[MCP4726]),
+ IIO_ENUM_AVAILABLE("powerdown_mode",
+ &mcp472x_powerdown_mode_enum[MCP4726]),
{ },
};
-static const struct iio_chan_spec mcp4725_channel = {
- .type = IIO_VOLTAGE,
- .indexed = 1,
- .output = 1,
- .channel = 0,
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
- .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
- .ext_info = mcp4725_ext_info,
+static const struct iio_chan_spec mcp472x_channel[] = {
+ [MCP4725] = {
+ .type = IIO_VOLTAGE,
+ .indexed = 1,
+ .output = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
+ .ext_info = mcp4725_ext_info,
+ },
+ [MCP4726] = {
+ .type = IIO_VOLTAGE,
+ .indexed = 1,
+ .output = 1,
+ .channel = 0,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),
+ .ext_info = mcp4726_ext_info,
+ },
};
static int mcp4725_set_value(struct iio_dev *indio_dev, int val)
@@ -302,7 +348,7 @@ static int mcp4725_probe(struct i2c_client *client,
indio_dev->dev.parent = &client->dev;
indio_dev->name = id->name;
indio_dev->info = &mcp4725_info;
- indio_dev->channels = &mcp4725_channel;
+ indio_dev->channels = &mcp472x_channel[id->driver_data];
indio_dev->num_channels = 1;
indio_dev->modes = INDIO_DIRECT_MODE;
@@ -316,7 +362,7 @@ static int mcp4725_probe(struct i2c_client *client,
}
pd = (inbuf[0] >> 1) & 0x3;
data->powerdown = pd > 0 ? true : false;
- data->powerdown_mode = pd ? pd-1 : 2; /* 500kohm_to_gnd */
+ data->powerdown_mode = pd ? pd - 1 : 2; /* largest register to gnd */
data->dac_value = (inbuf[1] << 4) | (inbuf[2] >> 4);
return iio_device_register(indio_dev);
@@ -329,7 +375,8 @@ static int mcp4725_remove(struct i2c_client *client)
}
static const struct i2c_device_id mcp4725_id[] = {
- { "mcp4725", 0 },
+ { "mcp4725", MCP4725 },
+ { "mcp4726", MCP4726 },
{ }
};
MODULE_DEVICE_TABLE(i2c, mcp4725_id);
@@ -346,5 +393,5 @@ static struct i2c_driver mcp4725_driver = {
module_i2c_driver(mcp4725_driver);
MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
-MODULE_DESCRIPTION("MCP4725 12-bit DAC");
+MODULE_DESCRIPTION("MCP4725/6 12-bit DAC");
MODULE_LICENSE("GPL");