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authorMarc Andre <marc.andre@netline.ch>2016-02-08 18:01:47 +0100
committerJonathan Cameron <jic23@kernel.org>2016-02-08 18:38:58 +0000
commit8d144c9608a6efb62b2a53f81e1bbe4f6c1d0e78 (patch)
treeb50995a3070bb7cc863e1e6e55994ff8aee671ed /drivers/iio/dac
parent78f585feed754c94f890cf94c1eed31ab11830c6 (diff)
iio:ad5064: Add support for ltc2617 and similar devices
The Linear Technology LTC2606, LTC2607, LTC2609, LTC2616, LTC2617, LTC2619, LTC2626, LTC2627 and LTC2629 devices are very similar to the AD5064 device. This patch adds support for those devices. Datasheet for LTC devices: LTC2606, LTC2616, LTC2626: http://www.linear.com/docs/6398 LTC2607, LTC2617, LTC2627: http://www.linear.com/docs/8977 LTC2709, LTC2619, LTC2629: http://www.linear.com/docs/8477 Signed-off-by: Marc Andre <marc.andre@netline.ch> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/dac')
-rw-r--r--drivers/iio/dac/ad5064.c112
1 files changed, 111 insertions, 1 deletions
diff --git a/drivers/iio/dac/ad5064.c b/drivers/iio/dac/ad5064.c
index c55282d5e753..7cc3e93a2aa6 100644
--- a/drivers/iio/dac/ad5064.c
+++ b/drivers/iio/dac/ad5064.c
@@ -1,6 +1,8 @@
/*
* AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5628, AD5629R,
- * AD5648, AD5666, AD5668, AD5669R Digital to analog converters driver
+ * AD5648, AD5666, AD5668, AD5669R, LTC2606, LTC2607, LTC2609, LTC2616,
+ * LTC2617, LTC2619, LTC2626, LTC2627, LTC2629 Digital to analog converters
+ * driver
*
* Copyright 2011 Analog Devices Inc.
*
@@ -126,6 +128,15 @@ enum ad5064_type {
ID_AD5668_2,
ID_AD5669_1,
ID_AD5669_2,
+ ID_LTC2606,
+ ID_LTC2607,
+ ID_LTC2609,
+ ID_LTC2616,
+ ID_LTC2617,
+ ID_LTC2619,
+ ID_LTC2626,
+ ID_LTC2627,
+ ID_LTC2629,
};
static int ad5064_write(struct ad5064_state *st, unsigned int cmd,
@@ -164,6 +175,10 @@ static const char * const ad5064_powerdown_modes[] = {
"three_state",
};
+static const char * const ltc2617_powerdown_modes[] = {
+ "90kohm_to_gnd",
+};
+
static int ad5064_get_powerdown_mode(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan)
{
@@ -194,6 +209,13 @@ static const struct iio_enum ad5064_powerdown_mode_enum = {
.set = ad5064_set_powerdown_mode,
};
+static const struct iio_enum ltc2617_powerdown_mode_enum = {
+ .items = ltc2617_powerdown_modes,
+ .num_items = ARRAY_SIZE(ltc2617_powerdown_modes),
+ .get = ad5064_get_powerdown_mode,
+ .set = ad5064_set_powerdown_mode,
+};
+
static ssize_t ad5064_read_dac_powerdown(struct iio_dev *indio_dev,
uintptr_t private, const struct iio_chan_spec *chan, char *buf)
{
@@ -304,6 +326,18 @@ static const struct iio_chan_spec_ext_info ad5064_ext_info[] = {
{ },
};
+static const struct iio_chan_spec_ext_info ltc2617_ext_info[] = {
+ {
+ .name = "powerdown",
+ .read = ad5064_read_dac_powerdown,
+ .write = ad5064_write_dac_powerdown,
+ .shared = IIO_SEPARATE,
+ },
+ IIO_ENUM("powerdown_mode", IIO_SEPARATE, &ltc2617_powerdown_mode_enum),
+ IIO_ENUM_AVAILABLE("powerdown_mode", &ltc2617_powerdown_mode_enum),
+ { },
+};
+
#define AD5064_CHANNEL(chan, addr, bits, _shift, _ext_info) { \
.type = IIO_VOLTAGE, \
.indexed = 1, \
@@ -350,6 +384,10 @@ static DECLARE_AD5065_CHANNELS(ad5065_channels, 16, 4, ad5064_ext_info);
static DECLARE_AD5064_CHANNELS(ad5629_channels, 12, 4, ad5064_ext_info);
static DECLARE_AD5064_CHANNELS(ad5669_channels, 16, 0, ad5064_ext_info);
+static DECLARE_AD5064_CHANNELS(ltc2607_channels, 16, 0, ltc2617_ext_info);
+static DECLARE_AD5064_CHANNELS(ltc2617_channels, 14, 2, ltc2617_ext_info);
+static DECLARE_AD5064_CHANNELS(ltc2627_channels, 12, 4, ltc2617_ext_info);
+
static const struct ad5064_chip_info ad5064_chip_info_tbl[] = {
[ID_AD5024] = {
.shared_vref = false,
@@ -458,6 +496,69 @@ static const struct ad5064_chip_info ad5064_chip_info_tbl[] = {
.channels = ad5669_channels,
.num_channels = 8,
},
+ [ID_LTC2606] = {
+ .shared_vref = true,
+ .internal_vref = 0,
+ .channels = ltc2607_channels,
+ .num_channels = 1,
+ .powerdown_ltc = true,
+ },
+ [ID_LTC2607] = {
+ .shared_vref = true,
+ .internal_vref = 0,
+ .channels = ltc2607_channels,
+ .num_channels = 2,
+ .powerdown_ltc = true,
+ },
+ [ID_LTC2609] = {
+ .shared_vref = false,
+ .internal_vref = 0,
+ .channels = ltc2607_channels,
+ .num_channels = 4,
+ .powerdown_ltc = true,
+ },
+ [ID_LTC2616] = {
+ .shared_vref = true,
+ .internal_vref = 0,
+ .channels = ltc2617_channels,
+ .num_channels = 1,
+ .powerdown_ltc = true,
+ },
+ [ID_LTC2617] = {
+ .shared_vref = true,
+ .internal_vref = 0,
+ .channels = ltc2617_channels,
+ .num_channels = 2,
+ .powerdown_ltc = true,
+ },
+ [ID_LTC2619] = {
+ .shared_vref = false,
+ .internal_vref = 0,
+ .channels = ltc2617_channels,
+ .num_channels = 4,
+ .powerdown_ltc = true,
+ },
+ [ID_LTC2626] = {
+ .shared_vref = true,
+ .internal_vref = 0,
+ .channels = ltc2627_channels,
+ .num_channels = 1,
+ .powerdown_ltc = true,
+ },
+ [ID_LTC2627] = {
+ .shared_vref = true,
+ .internal_vref = 0,
+ .channels = ltc2627_channels,
+ .num_channels = 2,
+ .powerdown_ltc = true,
+ },
+ [ID_LTC2629] = {
+ .shared_vref = false,
+ .internal_vref = 0,
+ .channels = ltc2627_channels,
+ .num_channels = 4,
+ .powerdown_ltc = true,
+ },
};
static inline unsigned int ad5064_num_vref(struct ad5064_state *st)
@@ -668,6 +769,15 @@ static const struct i2c_device_id ad5064_i2c_ids[] = {
{"ad5669-1", ID_AD5669_1},
{"ad5669-2", ID_AD5669_2},
{"ad5669-3", ID_AD5669_2}, /* similar enough to ad5669-2 */
+ {"ltc2606", ID_LTC2606},
+ {"ltc2607", ID_LTC2607},
+ {"ltc2609", ID_LTC2609},
+ {"ltc2616", ID_LTC2616},
+ {"ltc2617", ID_LTC2617},
+ {"ltc2619", ID_LTC2619},
+ {"ltc2626", ID_LTC2626},
+ {"ltc2627", ID_LTC2627},
+ {"ltc2629", ID_LTC2629},
{}
};
MODULE_DEVICE_TABLE(i2c, ad5064_i2c_ids);