iio: adc: ad7173: add support for additional models

Add support for Analog Devices AD7172-2, AD7175-8, AD7177-2.

Signed-off-by: Dumitru Ceclan <mitrutzceclan@gmail.com>
Link: https://lore.kernel.org/r/20240306110956.13167-4-mitrutzceclan@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
index 59a55d2944a7477f4130035aafdc5448ae3362ee..4ff6ce46b02cc7bf215caf8e346e691c8eb00b39 100644 (file)
--- a/drivers/iio/adc/ad7173.c
+++ b/drivers/iio/adc/ad7173.c
@@ -1,6 +1,11 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
- * AD7172-2/AD7173-8/AD7175-2/AD7176-2 SPI ADC driver
+ * AD717x family SPI ADC driver
+ *
+ * Supported devices:
+ *  AD7172-2/AD7172-4/AD7173-8/AD7175-2
+ *  AD7175-8/AD7176-2/AD7177-2
+ *
  * Copyright (C) 2015, 2024 Analog Devices, Inc.
  */
 
@@ -64,7 +69,11 @@
 #define AD7172_2_ID                    0x00d0
 #define AD7175_ID                      0x0cd0
 #define AD7176_ID                      0x0c90
+#define AD7175_2_ID                    0x0cd0
+#define AD7172_4_ID                    0x2050
 #define AD7173_ID                      0x30d0
+#define AD7175_8_ID                    0x3cd0
+#define AD7177_ID                      0x4fd0
 #define AD7173_ID_MASK                 GENMASK(15, 4)
 
 #define AD7173_ADC_MODE_REF_EN         BIT(15)
@@ -110,20 +119,25 @@
 #define AD7173_SETUP_REF_SEL_EXT_REF   0x0
 #define AD7173_VOLTAGE_INT_REF_uV      2500000
 #define AD7173_TEMP_SENSIIVITY_uV_per_C        477
+#define AD7177_ODR_START_VALUE         0x07
 
 #define AD7173_FILTER_ODR0_MASK                GENMASK(5, 0)
 #define AD7173_MAX_CONFIGS             8
 
 enum ad7173_ids {
        ID_AD7172_2,
+       ID_AD7172_4,
        ID_AD7173_8,
        ID_AD7175_2,
+       ID_AD7175_8,
        ID_AD7176_2,
+       ID_AD7177_2,
 };
 
 struct ad7173_device_info {
        const unsigned int *sinc5_data_rates;
        unsigned int num_sinc5_data_rates;
+       unsigned int odr_start_value;
        unsigned int num_channels;
        unsigned int num_configs;
        unsigned int num_inputs;
@@ -131,6 +145,8 @@ struct ad7173_device_info {
        unsigned int id;
        char *name;
        bool has_temp;
+       bool has_int_ref;
+       bool has_ref2;
        u8 num_gpios;
 };
 
@@ -196,6 +212,19 @@ static const struct ad7173_device_info ad7173_device_info[] = {
                .num_configs = 4,
                .num_gpios = 2,
                .has_temp = true,
+               .has_int_ref = true,
+               .clock = 2 * HZ_PER_MHZ,
+               .sinc5_data_rates = ad7173_sinc5_data_rates,
+               .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
+       },
+       [ID_AD7172_4] = {
+               .id = AD7172_4_ID,
+               .num_inputs = 9,
+               .num_channels = 8,
+               .num_configs = 8,
+               .num_gpios = 4,
+               .has_temp = false,
+               .has_ref2 = true,
                .clock = 2 * HZ_PER_MHZ,
                .sinc5_data_rates = ad7173_sinc5_data_rates,
                .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
@@ -208,18 +237,34 @@ static const struct ad7173_device_info ad7173_device_info[] = {
                .num_configs = 8,
                .num_gpios = 4,
                .has_temp = true,
+               .has_int_ref = true,
+               .has_ref2 = true,
                .clock = 2 * HZ_PER_MHZ,
                .sinc5_data_rates = ad7173_sinc5_data_rates,
                .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates),
        },
        [ID_AD7175_2] = {
                .name = "ad7175-2",
-               .id = AD7175_ID,
+               .id = AD7175_2_ID,
                .num_inputs = 5,
                .num_channels = 4,
                .num_configs = 4,
                .num_gpios = 2,
                .has_temp = true,
+               .has_int_ref = true,
+               .clock = 16 * HZ_PER_MHZ,
+               .sinc5_data_rates = ad7175_sinc5_data_rates,
+               .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
+       },
+       [ID_AD7175_8] = {
+               .id = AD7175_8_ID,
+               .num_inputs = 17,
+               .num_channels = 16,
+               .num_configs = 8,
+               .num_gpios = 4,
+               .has_temp = true,
+               .has_int_ref = true,
+               .has_ref2 = true,
                .clock = 16 * HZ_PER_MHZ,
                .sinc5_data_rates = ad7175_sinc5_data_rates,
                .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
@@ -232,7 +277,21 @@ static const struct ad7173_device_info ad7173_device_info[] = {
                .num_configs = 4,
                .num_gpios = 2,
                .has_temp = false,
+               .has_int_ref = true,
+               .clock = 16 * HZ_PER_MHZ,
+               .sinc5_data_rates = ad7175_sinc5_data_rates,
+               .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
+       },
+       [ID_AD7177_2] = {
+               .id = AD7177_ID,
+               .num_inputs = 5,
+               .num_channels = 4,
+               .num_configs = 4,
+               .num_gpios = 2,
+               .has_temp = true,
+               .has_int_ref = true,
                .clock = 16 * HZ_PER_MHZ,
+               .odr_start_value = AD7177_ODR_START_VALUE,
                .sinc5_data_rates = ad7175_sinc5_data_rates,
                .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates),
        },
@@ -656,7 +715,7 @@ static int ad7173_write_raw(struct iio_dev *indio_dev,
        switch (info) {
        case IIO_CHAN_INFO_SAMP_FREQ:
                freq = val * MILLI + val2 / MILLI;
-               for (i = 0; i < st->info->num_sinc5_data_rates - 1; i++)
+               for (i = st->info->odr_start_value; i < st->info->num_sinc5_data_rates - 1; i++)
                        if (freq >= st->info->sinc5_data_rates[i])
                                break;
 
@@ -908,11 +967,17 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
                else
                        ref_sel = ret;
 
-               if (ref_sel == AD7173_SETUP_REF_SEL_EXT_REF2 &&
-                   st->info->id != AD7173_ID) {
+               if (ref_sel == AD7173_SETUP_REF_SEL_INT_REF &&
+                   !st->info->has_int_ref) {
+                       fwnode_handle_put(child);
+                       return dev_err_probe(dev, -EINVAL,
+                               "Internal reference is not available on current model.\n");
+               }
+
+               if (ref_sel == AD7173_SETUP_REF_SEL_EXT_REF2 && !st->info->has_ref2) {
                        fwnode_handle_put(child);
                        return dev_err_probe(dev, -EINVAL,
-                               "External reference 2 is only available on ad7173-8\n");
+                               "External reference 2 is not available on current model.\n");
                }
 
                ret = ad7173_get_ref_voltage_milli(st, ref_sel);
@@ -1080,21 +1145,30 @@ static int ad7173_probe(struct spi_device *spi)
 static const struct of_device_id ad7173_of_match[] = {
        { .compatible = "adi,ad7172-2",
          .data = &ad7173_device_info[ID_AD7172_2]},
+       { .compatible = "adi,ad7172-4",
+         .data = &ad7173_device_info[ID_AD7172_4]},
        { .compatible = "adi,ad7173-8",
          .data = &ad7173_device_info[ID_AD7173_8]},
        { .compatible = "adi,ad7175-2",
          .data = &ad7173_device_info[ID_AD7175_2]},
+       { .compatible = "adi,ad7175-8",
+         .data = &ad7173_device_info[ID_AD7175_8]},
        { .compatible = "adi,ad7176-2",
          .data = &ad7173_device_info[ID_AD7176_2]},
+       { .compatible = "adi,ad7177-2",
+         .data = &ad7173_device_info[ID_AD7177_2]},
        { }
 };
 MODULE_DEVICE_TABLE(of, ad7173_of_match);
 
 static const struct spi_device_id ad7173_id_table[] = {
        { "ad7172-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7172_2]},
+       { "ad7172-4", (kernel_ulong_t)&ad7173_device_info[ID_AD7172_4]},
        { "ad7173-8", (kernel_ulong_t)&ad7173_device_info[ID_AD7173_8]},
        { "ad7175-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7175_2]},
+       { "ad7175-8", (kernel_ulong_t)&ad7173_device_info[ID_AD7175_8]},
        { "ad7176-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7176_2]},
+       { "ad7177-2", (kernel_ulong_t)&ad7173_device_info[ID_AD7177_2]},
        { }
 };
 MODULE_DEVICE_TABLE(spi, ad7173_id_table);