Commit 9f15a4a0 authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Jonathan Cameron
Browse files

iio: dac: ltc2632: add support for LTC2636 family 



The only difference between LTC2632 and LTC2636 is that the former has
two DAC channels while the latter has eight.

Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent f243d0f0

drivers/iio/dac/Kconfig

+3 −2
Original line number Diff line number Diff line
@@ -132,11 +132,12 @@ config LTC1660 
	  module will be called ltc1660.



config LTC2632

	tristate "Linear Technology LTC2632-12/10/8 DAC spi driver"

	tristate "Linear Technology LTC2632-12/10/8 and LTC2636-12/10/8 DAC spi driver"

	depends on SPI

	help

	  Say yes here to build support for Linear Technology

	  LTC2632-12, LTC2632-10, LTC2632-8 converters (DAC).

	  LTC2632-12, LTC2632-10, LTC2632-8, LTC2636-12, LTC2636-10 and

	  LTC2636-8 converters (DAC).



	  To compile this driver as a module, choose M here: the

	  module will be called ltc2632.

drivers/iio/dac/ltc2632.c

+74 −3
Original line number Diff line number Diff line
@@ -12,8 +12,6 @@ 
#include <linux/iio/iio.h>

#include <linux/regulator/consumer.h>



#define LTC2632_DAC_CHANNELS                    2



#define LTC2632_ADDR_DAC0                       0x0

#define LTC2632_ADDR_DAC1                       0x1
@@ -33,6 +31,7 @@ 
 */

struct ltc2632_chip_info {

	const struct iio_chan_spec *channels;

	const size_t num_channels;

	const int vref_mv;

};
@@ -57,6 +56,12 @@ enum ltc2632_supported_device_ids { 
	ID_LTC2632H12,

	ID_LTC2632H10,

	ID_LTC2632H8,

	ID_LTC2636L12,

	ID_LTC2636L10,

	ID_LTC2636L8,

	ID_LTC2636H12,

	ID_LTC2636H10,

	ID_LTC2636H8,

};



static int ltc2632_spi_write(struct spi_device *spi,
@@ -190,6 +195,12 @@ static const struct iio_chan_spec_ext_info ltc2632_ext_info[] = { 
	const struct iio_chan_spec _name ## _channels[] = { \

		LTC2632_CHANNEL(0, _bits), \

		LTC2632_CHANNEL(1, _bits), \

		LTC2632_CHANNEL(2, _bits), \

		LTC2632_CHANNEL(3, _bits), \

		LTC2632_CHANNEL(4, _bits), \

		LTC2632_CHANNEL(5, _bits), \

		LTC2632_CHANNEL(6, _bits), \

		LTC2632_CHANNEL(7, _bits), \

	}



static DECLARE_LTC2632_CHANNELS(ltc2632x12, 12);
@@ -199,26 +210,62 @@ static DECLARE_LTC2632_CHANNELS(ltc2632x8, 8); 
static const struct ltc2632_chip_info ltc2632_chip_info_tbl[] = {

	[ID_LTC2632L12] = {

		.channels	= ltc2632x12_channels,

		.num_channels	= 2,

		.vref_mv	= 2500,

	},

	[ID_LTC2632L10] = {

		.channels	= ltc2632x10_channels,

		.num_channels	= 2,

		.vref_mv	= 2500,

	},

	[ID_LTC2632L8] =  {

		.channels	= ltc2632x8_channels,

		.num_channels	= 2,

		.vref_mv	= 2500,

	},

	[ID_LTC2632H12] = {

		.channels	= ltc2632x12_channels,

		.num_channels	= 2,

		.vref_mv	= 4096,

	},

	[ID_LTC2632H10] = {

		.channels	= ltc2632x10_channels,

		.num_channels	= 2,

		.vref_mv	= 4096,

	},

	[ID_LTC2632H8] =  {

		.channels	= ltc2632x8_channels,

		.num_channels	= 2,

		.vref_mv	= 4096,

	},

	[ID_LTC2636L12] = {

		.channels	= ltc2632x12_channels,

		.num_channels	= 8,

		.vref_mv	= 2500,

	},

	[ID_LTC2636L10] = {

		.channels	= ltc2632x10_channels,

		.num_channels	= 8,

		.vref_mv	= 2500,

	},

	[ID_LTC2636L8] =  {

		.channels	= ltc2632x8_channels,

		.num_channels	= 8,

		.vref_mv	= 2500,

	},

	[ID_LTC2636H12] = {

		.channels	= ltc2632x12_channels,

		.num_channels	= 8,

		.vref_mv	= 4096,

	},

	[ID_LTC2636H10] = {

		.channels	= ltc2632x10_channels,

		.num_channels	= 8,

		.vref_mv	= 4096,

	},

	[ID_LTC2636H8] =  {

		.channels	= ltc2632x8_channels,

		.num_channels	= 8,

		.vref_mv	= 4096,

	},

};
@@ -287,7 +334,7 @@ static int ltc2632_probe(struct spi_device *spi) 
	indio_dev->info = &ltc2632_info;

	indio_dev->modes = INDIO_DIRECT_MODE;

	indio_dev->channels = chip_info->channels;

	indio_dev->num_channels = LTC2632_DAC_CHANNELS;

	indio_dev->num_channels = chip_info->num_channels;



	return iio_device_register(indio_dev);

}
@@ -312,6 +359,12 @@ 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] },

	{ "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] },

	{ "ltc2636-h12", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636H12] },

	{ "ltc2636-h10", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636H10] },

	{ "ltc2636-h8", (kernel_ulong_t)&ltc2632_chip_info_tbl[ID_LTC2636H8] },

	{}

};

MODULE_DEVICE_TABLE(spi, ltc2632_id);
@@ -335,6 +388,24 @@ static const struct of_device_id ltc2632_of_match[] = { 
	}, {

		.compatible = "lltc,ltc2632-h8",

		.data = &ltc2632_chip_info_tbl[ID_LTC2632H8]

	}, {

		.compatible = "lltc,ltc2636-l12",

		.data = &ltc2632_chip_info_tbl[ID_LTC2636L12]

	}, {

		.compatible = "lltc,ltc2636-l10",

		.data = &ltc2632_chip_info_tbl[ID_LTC2636L10]

	}, {

		.compatible = "lltc,ltc2636-l8",

		.data = &ltc2632_chip_info_tbl[ID_LTC2636L8]

	}, {

		.compatible = "lltc,ltc2636-h12",

		.data = &ltc2632_chip_info_tbl[ID_LTC2636H12]

	}, {

		.compatible = "lltc,ltc2636-h10",

		.data = &ltc2632_chip_info_tbl[ID_LTC2636H10]

	}, {

		.compatible = "lltc,ltc2636-h8",

		.data = &ltc2632_chip_info_tbl[ID_LTC2636H8]

	},

	{}

};

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