linux-kernel - [PATCH v1 2/2] iio: adc: aspeed: Add AST2700 ADC support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251103105217.1764355-2-billy_tsai@aspeedtech.com>
Date: Mon, 3 Nov 2025 18:52:17 +0800
From: Billy Tsai <billy_tsai@...eedtech.com>
To: <jic23@...nel.org>, <dlechner@...libre.com>, <nuno.sa@...log.com>,
	<andy@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>, <joel@....id.au>, <andrew@...econstruct.com.au>,
	<billy_tsai@...eedtech.com>, <linux-iio@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-aspeed@...ts.ozlabs.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v1 2/2] iio: adc: aspeed: Add AST2700 ADC support

This patch adds support for the ADCs found on the Aspeed AST2700 SoC,
which includes two instances: "ast2700-adc0" and "ast2700-adc1". While
they are functionally similar to those on AST2600, the OTP trimming data
is located at the same offset (0x820), but uses different bitfields.

Signed-off-by: Billy Tsai <billy_tsai@...eedtech.com>
---
 drivers/iio/adc/aspeed_adc.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c
index 8ab29948214a..9df6e7f68f19 100644
--- a/drivers/iio/adc/aspeed_adc.c
+++ b/drivers/iio/adc/aspeed_adc.c
@@ -646,6 +646,16 @@ static const struct aspeed_adc_trim_locate ast2600_adc1_trim = {
 	.field = GENMASK(7, 4),
 };
 
+static const struct aspeed_adc_trim_locate ast2700_adc0_trim = {
+	.offset = 0x820,
+	.field = GENMASK(3, 0),
+};
+
+static const struct aspeed_adc_trim_locate ast2700_adc1_trim = {
+	.offset = 0x820,
+	.field = GENMASK(7, 4),
+};
+
 static const struct aspeed_adc_model_data ast2400_model_data = {
 	.model_name = "ast2400-adc",
 	.vref_fixed_mv = 2500,
@@ -690,11 +700,35 @@ static const struct aspeed_adc_model_data ast2600_adc1_model_data = {
 	.trim_locate = &ast2600_adc1_trim,
 };
 
+static const struct aspeed_adc_model_data ast2700_adc0_model_data = {
+	.model_name = "ast2700-adc0",
+	.min_sampling_rate = 10000,
+	.max_sampling_rate = 500000,
+	.wait_init_sequence = true,
+	.bat_sense_sup = true,
+	.scaler_bit_width = 16,
+	.num_channels = 8,
+	.trim_locate = &ast2700_adc0_trim,
+};
+
+static const struct aspeed_adc_model_data ast2700_adc1_model_data = {
+	.model_name = "ast2700-adc1",
+	.min_sampling_rate = 10000,
+	.max_sampling_rate = 500000,
+	.wait_init_sequence = true,
+	.bat_sense_sup = true,
+	.scaler_bit_width = 16,
+	.num_channels = 8,
+	.trim_locate = &ast2700_adc1_trim,
+};
+
 static const struct of_device_id aspeed_adc_matches[] = {
 	{ .compatible = "aspeed,ast2400-adc", .data = &ast2400_model_data },
 	{ .compatible = "aspeed,ast2500-adc", .data = &ast2500_model_data },
 	{ .compatible = "aspeed,ast2600-adc0", .data = &ast2600_adc0_model_data },
 	{ .compatible = "aspeed,ast2600-adc1", .data = &ast2600_adc1_model_data },
+	{ .compatible = "aspeed,ast2700-adc0", .data = &ast2700_adc0_model_data },
+	{ .compatible = "aspeed,ast2700-adc1", .data = &ast2700_adc1_model_data },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, aspeed_adc_matches);
-- 
2.25.1