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iio: DAC extension for ltc2634-12/10/8 

This patch add support for Analog Devices (Linear Technology)
LTC2634 Quad 12-/10-/8-Bit Rail-to-Rail DAC.
The SPI functionality based on them from LTC2632 therefor
add the definitions only and update the Kconfig.

Signed-off-by: Chris Ruehl <chris.ruehl@gtsys.com.hk>

Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Chris Ruehl 2020-04-20 12:26:07 +08:00 committed by Jonathan Cameron
parent aefa5bc87c
commit 6f1c9e0da9
3 changed files with 70 additions and 4 deletions
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8
Documentation/devicetree/bindings/iio/dac/ltc2632.txt
View File

@ -1,4 +1,4 @@
Linear Technology LTC2632/2636 DAC
Linear Technology LTC2632/2634/2636 DAC
Required properties:
- compatible: Has to contain one of the following:
@ -8,6 +8,12 @@ Required properties:
lltc,ltc2632-h12
lltc,ltc2632-h10
lltc,ltc2632-h8
lltc,ltc2634-l12
lltc,ltc2634-l10
lltc,ltc2634-l8
lltc,ltc2634-h12
lltc,ltc2634-h10
lltc,ltc2634-h8
lltc,ltc2636-l12
lltc,ltc2636-l10
lltc,ltc2636-l8

6
drivers/iio/dac/Kconfig
View File

@ -279,12 +279,12 @@ config LTC1660
module will be called ltc1660.
config LTC2632
tristate "Linear Technology LTC2632-12/10/8 and LTC2636-12/10/8 DAC spi driver"
tristate "Linear Technology LTC2632-12/10/8 and similar DAC spi driver"
depends on SPI
help
Say yes here to build support for Linear Technology
LTC2632-12, LTC2632-10, LTC2632-8, LTC2636-12, LTC2636-10 and
LTC2636-8 converters (DAC).
LTC2632, LTC2634 and LTC2636 DAC resolution 12/10/8 bit
low 0-2.5V and high 0-4.096V range converters.
To compile this driver as a module, choose M here: the
module will be called ltc2632.

60
drivers/iio/dac/ltc2632.c
View File

@ -56,6 +56,12 @@ enum ltc2632_supported_device_ids {
ID_LTC2632H12,
ID_LTC2632H10,
ID_LTC2632H8,
ID_LTC2634L12,
ID_LTC2634L10,
ID_LTC2634L8,
ID_LTC2634H12,
ID_LTC2634H10,
ID_LTC2634H8,
ID_LTC2636L12,
ID_LTC2636L10,
ID_LTC2636L8,
@ -236,6 +242,36 @@ static const struct ltc2632_chip_info ltc2632_chip_info_tbl[] = {
.num_channels = 2,
.vref_mv = 4096,
},
[ID_LTC2634L12] = {
.channels = ltc2632x12_channels,
.num_channels = 4,
.vref_mv = 2500,
},
[ID_LTC2634L10] = {
.channels = ltc2632x10_channels,
.num_channels = 4,
.vref_mv = 2500,
},
[ID_LTC2634L8] = {
.channels = ltc2632x8_channels,
.num_channels = 4,
.vref_mv = 2500,
},
[ID_LTC2634H12] = {
.channels = ltc2632x12_channels,
.num_channels = 4,
.vref_mv = 4096,
},
[ID_LTC2634H10] = {
.channels = ltc2632x10_channels,
.num_channels = 4,
.vref_mv = 4096,
},
[ID_LTC2634H8] = {
.channels = ltc2632x8_channels,
.num_channels = 4,
.vref_mv = 4096,
},
[ID_LTC2636L12] = {
.channels = ltc2632x12_channels,
.num_channels = 8,
@ -357,6 +393,12 @@ static const struct spi_device_id ltc2632_id[] = {
{ "ltc2632-h12", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2632H12] },
{ "ltc2632-h10", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2632H10] },
{ "ltc2632-h8", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2632H8] },
{ "ltc2634-l12", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634L12] },
{ "ltc2634-l10", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634L10] },
{ "ltc2634-l8", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634L8] },
{ "ltc2634-h12", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634H12] },
{ "ltc2634-h10", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634H10] },
{ "ltc2634-h8", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2634H8] },
{ "ltc2636-l12", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636L12] },
{ "ltc2636-l10", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636L10] },
{ "ltc2636-l8", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636L8] },
@ -386,6 +428,24 @@ static const struct of_device_id ltc2632_of_match[] = {
}, {
.compatible = "lltc,ltc2632-h8",
.data = &ltc2632_chip_info_tbl[ID_LTC2632H8]
}, {
.compatible = "lltc,ltc2634-l12",
.data = &ltc2632_chip_info_tbl[ID_LTC2634L12]
}, {
.compatible = "lltc,ltc2634-l10",
.data = &ltc2632_chip_info_tbl[ID_LTC2634L10]
}, {
.compatible = "lltc,ltc2634-l8",
.data = &ltc2632_chip_info_tbl[ID_LTC2634L8]
}, {
.compatible = "lltc,ltc2634-h12",
.data = &ltc2632_chip_info_tbl[ID_LTC2634H12]
}, {
.compatible = "lltc,ltc2634-h10",
.data = &ltc2632_chip_info_tbl[ID_LTC2634H10]
}, {
.compatible = "lltc,ltc2634-h8",
.data = &ltc2632_chip_info_tbl[ID_LTC2634H8]
}, {
.compatible = "lltc,ltc2636-l12",
.data = &ltc2632_chip_info_tbl[ID_LTC2636L12]