linux-kernel - [PATCH v1 1/2] iio: adc: ti-adc128s052: add support for adc121s021

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Message-Id: <20250625170218.545654-2-l.rubusch@gmail.com>
Date: Wed, 25 Jun 2025 17:02:17 +0000
From: Lothar Rubusch <l.rubusch@...il.com>
To: mazziesaccount@...il.com,
	jic23@...nel.org,
	dlechner@...libre.com,
	nuno.sa@...log.com,
	andy@...nel.org
Cc: linux-iio@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	l.rubusch@...il.com
Subject: [PATCH v1 1/2] iio: adc: ti-adc128s052: add support for adc121s021

Add support for the single channel variant(s) of this ADC.

Signed-off-by: Lothar Rubusch <l.rubusch@...il.com>
---
 drivers/iio/adc/ti-adc128s052.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ti-adc128s052.c b/drivers/iio/adc/ti-adc128s052.c
index 1b46a8155803..cf271c39e663 100644
--- a/drivers/iio/adc/ti-adc128s052.c
+++ b/drivers/iio/adc/ti-adc128s052.c
@@ -7,6 +7,7 @@
  * https://www.ti.com/lit/ds/symlink/adc128s052.pdf
  * https://www.ti.com/lit/ds/symlink/adc122s021.pdf
  * https://www.ti.com/lit/ds/symlink/adc124s021.pdf
+ * https://www.ti.com/lit/ds/symlink/adc121s021.pdf
  */
 
 #include <linux/cleanup.h>
@@ -110,6 +111,10 @@ static const struct iio_chan_spec adc128s052_channels[] = {
 	ADC128_VOLTAGE_CHANNEL(7),
 };
 
+static const struct iio_chan_spec adc121s021_channels[] = {
+	ADC128_VOLTAGE_CHANNEL(0),
+};
+
 static const struct iio_chan_spec adc122s021_channels[] = {
 	ADC128_VOLTAGE_CHANNEL(0),
 	ADC128_VOLTAGE_CHANNEL(1),
@@ -143,6 +148,10 @@ static const struct adc128_configuration adc128_config[] = {
 		.refname = "vdd",
 		.other_regulators = &bd79104_regulators,
 		.num_other_regulators = 1,
+	}, {
+		.channels = adc121s021_channels,
+		.num_channels = ARRAY_SIZE(adc121s021_channels),
+		.refname = "vref",
 	},
 };
 
@@ -207,7 +216,10 @@ static const struct of_device_id adc128_of_match[] = {
 	{ .compatible = "ti,adc124s051", .data = &adc128_config[2] },
 	{ .compatible = "ti,adc124s101", .data = &adc128_config[2] },
 	{ .compatible = "rohm,bd79104", .data = &adc128_config[3] },
-	{ }
+	{ .compatible = "ti,adc121s021", .data = &adc128_config[4] },
+	{ .compatible = "ti,adc121s051", .data = &adc128_config[4] },
+	{ .compatible = "ti,adc121s101", .data = &adc128_config[4] },
+	{ },
 };
 MODULE_DEVICE_TABLE(of, adc128_of_match);
 
@@ -220,6 +232,9 @@ static const struct spi_device_id adc128_id[] = {
 	{ "adc124s051", (kernel_ulong_t)&adc128_config[2] },
 	{ "adc124s101", (kernel_ulong_t)&adc128_config[2] },
 	{ "bd79104", (kernel_ulong_t)&adc128_config[3] },
+	{ "adc121s021", (kernel_ulong_t)&adc128_config[4] },
+	{ "adc121s051", (kernel_ulong_t)&adc128_config[4] },
+	{ "adc121s101", (kernel_ulong_t)&adc128_config[4] },
 	{ }
 };
 MODULE_DEVICE_TABLE(spi, adc128_id);
-- 
2.39.5