iio: adc: ad4030: add support for ad4632-16 and ad4632-24

AD4632-24 and AD4632-16 are 2 channels ADCs. Both channels are
interleaved bit per bit on SDO line.

Both of them do not have evaluation board. As such, the support added
here can't be tested. Support is provided as best effort until someone get
their hands on one.

Signed-off-by: Esteban Blanc <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/adc/ad4030.c

···
 #define     AD4030_REG_CHIP_GRADE_AD4030_24_GRADE	0x10
 #define     AD4030_REG_CHIP_GRADE_AD4630_16_GRADE	0x03
 #define     AD4030_REG_CHIP_GRADE_AD4630_24_GRADE	0x00
+#define     AD4030_REG_CHIP_GRADE_AD4632_16_GRADE	0x05
+#define     AD4030_REG_CHIP_GRADE_AD4632_24_GRADE	0x02
 #define     AD4030_REG_CHIP_GRADE_MASK_CHIP_GRADE	GENMASK(7, 3)
 #define AD4030_REG_SCRATCH_PAD			0x0A
 #define AD4030_REG_SPI_REVISION			0x0B
···
 #define AD4030_TCYC_NS			500
 #define AD4030_TCYC_ADJUSTED_NS		(AD4030_TCYC_NS - AD4030_TCNVL_NS)
 #define AD4030_TRESET_PW_NS		50
+#define AD4632_TCYC_NS			2000
+#define AD4632_TCYC_ADJUSTED_NS		(AD4632_TCYC_NS - AD4030_TCNVL_NS)
+#define AD4030_TRESET_COM_DELAY_MS	750
 
 enum ad4030_out_mode {
 	AD4030_OUT_DATA_MD_DIFF,
···
 	.tcyc_ns = AD4030_TCYC_ADJUSTED_NS,
 };
 
+static const struct ad4030_chip_info ad4632_16_chip_info = {
+	.name = "ad4632-16",
+	.available_masks = ad4630_channel_masks,
+	.channels = {
+		AD4030_CHAN_DIFF(0, ad4030_16_scan_types),
+		AD4030_CHAN_DIFF(1, ad4030_16_scan_types),
+		AD4030_CHAN_CMO(2, 0),
+		AD4030_CHAN_CMO(3, 1),
+		IIO_CHAN_SOFT_TIMESTAMP(4),
+	},
+	.grade = AD4030_REG_CHIP_GRADE_AD4632_16_GRADE,
+	.precision_bits = 16,
+	.num_voltage_inputs = 2,
+	.tcyc_ns = AD4632_TCYC_ADJUSTED_NS,
+};
+
+static const struct ad4030_chip_info ad4632_24_chip_info = {
+	.name = "ad4632-24",
+	.available_masks = ad4630_channel_masks,
+	.channels = {
+		AD4030_CHAN_DIFF(0, ad4030_24_scan_types),
+		AD4030_CHAN_DIFF(1, ad4030_24_scan_types),
+		AD4030_CHAN_CMO(2, 0),
+		AD4030_CHAN_CMO(3, 1),
+		IIO_CHAN_SOFT_TIMESTAMP(4),
+	},
+	.grade = AD4030_REG_CHIP_GRADE_AD4632_24_GRADE,
+	.precision_bits = 24,
+	.num_voltage_inputs = 2,
+	.tcyc_ns = AD4632_TCYC_ADJUSTED_NS,
+};
+
 static const struct spi_device_id ad4030_id_table[] = {
 	{ "ad4030-24", (kernel_ulong_t)&ad4030_24_chip_info },
 	{ "ad4630-16", (kernel_ulong_t)&ad4630_16_chip_info },
 	{ "ad4630-24", (kernel_ulong_t)&ad4630_24_chip_info },
+	{ "ad4632-16", (kernel_ulong_t)&ad4632_16_chip_info },
+	{ "ad4632-24", (kernel_ulong_t)&ad4632_24_chip_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, ad4030_id_table);
···
 	{ .compatible = "adi,ad4030-24", .data = &ad4030_24_chip_info },
 	{ .compatible = "adi,ad4630-16", .data = &ad4630_16_chip_info },
 	{ .compatible = "adi,ad4630-24", .data = &ad4630_24_chip_info },
+	{ .compatible = "adi,ad4632-16", .data = &ad4632_16_chip_info },
+	{ .compatible = "adi,ad4632-24", .data = &ad4632_24_chip_info },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, ad4030_of_match);