iio: adc: ad4080: add support for AD4884

Add support for the AD4884, a dual-channel, 16-bit, 40 MSPS SAR ADC.

The AD4884 is the dual-channel variant of the AD4084, sharing the same
register map and SPI interface as the rest of the AD4080 family. Like
the AD4880, it uses two independent ADC channels, each with its own SPI
configuration interface.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/adc/ad4080.c b/drivers/iio/adc/ad4080.c
index 265d85ac171a97148b14773967ad4d7860af4770..764d49eca9e0e3fe14bf16a9c4751f113cd9e968 100644 (file)
--- a/drivers/iio/adc/ad4080.c
+++ b/drivers/iio/adc/ad4080.c
@@ -136,6 +136,7 @@
 #define AD4087_CHIP_ID                                         0x0057
 #define AD4088_CHIP_ID                                         0x0058
 #define AD4880_CHIP_ID                                         0x0750
+#define AD4884_CHIP_ID                                         0x005C
 
 #define AD4080_MAX_CHANNELS                                    2
 
@@ -541,6 +542,11 @@ static const struct iio_chan_spec ad4880_channels[] = {
        AD4880_CHANNEL_DEFINE(20, 32, 1),
 };
 
+static const struct iio_chan_spec ad4884_channels[] = {
+       AD4880_CHANNEL_DEFINE(16, 16, 0),
+       AD4880_CHANNEL_DEFINE(16, 16, 1),
+};
+
 static const struct ad4080_chip_info ad4080_chip_info = {
        .name = "ad4080",
        .product_id = AD4080_CHIP_ID,
@@ -641,6 +647,16 @@ static const struct ad4080_chip_info ad4880_chip_info = {
        .lvds_cnv_clk_cnt_max = AD4080_LVDS_CNV_CLK_CNT_MAX,
 };
 
+static const struct ad4080_chip_info ad4884_chip_info = {
+       .name = "ad4884",
+       .product_id = AD4884_CHIP_ID,
+       .scale_table = ad4080_scale_table,
+       .num_scales = ARRAY_SIZE(ad4080_scale_table),
+       .num_channels = 2,
+       .channels = ad4884_channels,
+       .lvds_cnv_clk_cnt_max = 2,
+};
+
 static int ad4080_setup_channel(struct ad4080_state *st, unsigned int ch)
 {
        struct device *dev = regmap_get_device(st->regmap[ch]);
@@ -843,6 +859,7 @@ static const struct spi_device_id ad4080_id[] = {
        { "ad4087", (kernel_ulong_t)&ad4087_chip_info },
        { "ad4088", (kernel_ulong_t)&ad4088_chip_info },
        { "ad4880", (kernel_ulong_t)&ad4880_chip_info },
+       { "ad4884", (kernel_ulong_t)&ad4884_chip_info },
        { }
 };
 MODULE_DEVICE_TABLE(spi, ad4080_id);
@@ -858,6 +875,7 @@ static const struct of_device_id ad4080_of_match[] = {
        { .compatible = "adi,ad4087", &ad4087_chip_info },
        { .compatible = "adi,ad4088", &ad4088_chip_info },
        { .compatible = "adi,ad4880", &ad4880_chip_info },
+       { .compatible = "adi,ad4884", &ad4884_chip_info },
        { }
 };
 MODULE_DEVICE_TABLE(of, ad4080_of_match);