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a=ed25519-sha256; t=1778909655; l=1829; i=michal.piekos@mmpsystems.pl; s=20260301; h=from:subject:message-id; bh=iVKolaSgIipYjQbKkBTYus5BLxNsCP7aniEDBmtsS58=; b=dNa6nvUg/GEDjIL6hyUiuVL4nymIy38aSx4UJanAcfJXiJiRgIj9YzMM5w1YTWqpw+EonPSdz XBCZ7pufOLtDNkWNP6ubVt2aBmr4n5gzqbCDD5Nm/H+GNVvodpaj+Vj X-Developer-Key: i=michal.piekos@mmpsystems.pl; a=ed25519; pk=Aixyx03If7ZDamiKKN0lsa+0mtA+WjIuIf2ZQVYNBqg= X-Authenticated-Id: michal.piekos@mmpsystems.pl X-MORS-Enabled: yes X-MORS-DOMAIN: patchwork.local X-MORS-HOSTING: hosting172546 X-MORS-USER: hosting172546 X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= Add support for the GPADC for the Allwinner A523. It differs from the D1/T113s/R329/T507 by having two clocks. Acked-by: Conor Dooley Signed-off-by: Michal Piekos --- .../iio/adc/allwinner,sun20i-d1-gpadc.yaml | 32 +++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml b/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml index da605a051b94..6467800d30e2 100644 --- a/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml +++ b/Documentation/devicetree/bindings/iio/adc/allwinner,sun20i-d1-gpadc.yaml @@ -14,6 +14,7 @@ properties: oneOf: - enum: - allwinner,sun20i-d1-gpadc + - allwinner,sun55i-a523-gpadc - items: - enum: - allwinner,sun50i-h616-gpadc @@ -29,7 +30,12 @@ properties: const: 0 clocks: - maxItems: 1 + minItems: 1 + maxItems: 2 + + clock-names: + minItems: 1 + maxItems: 2 interrupts: maxItems: 1 @@ -40,6 +46,30 @@ properties: resets: maxItems: 1 +allOf: + - if: + properties: + compatible: + enum: + - allwinner,sun55i-a523-gpadc + then: + properties: + clocks: + items: + - description: Bus clock + - description: Module clock + clock-names: + items: + - const: bus + - const: mod + required: + - clock-names + else: + properties: + clocks: + maxItems: 1 + clock-names: false + patternProperties: "^channel@[0-9a-f]+$": $ref: adc.yaml From patchwork Sat May 16 05:34:15 2026 Content-Type: text/plain; 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Change driver to enable all clocks. Signed-off-by: Michal Piekos --- drivers/iio/adc/sun20i-gpadc-iio.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/iio/adc/sun20i-gpadc-iio.c b/drivers/iio/adc/sun20i-gpadc-iio.c index 861c14da75ad..f5fd2240b808 100644 --- a/drivers/iio/adc/sun20i-gpadc-iio.c +++ b/drivers/iio/adc/sun20i-gpadc-iio.c @@ -177,10 +177,10 @@ static int sun20i_gpadc_alloc_channels(struct iio_dev *indio_dev, static int sun20i_gpadc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct iio_dev *indio_dev; struct sun20i_gpadc_iio *info; + struct clk_bulk_data *clks; struct reset_control *rst; - struct clk *clk; + struct iio_dev *indio_dev; int irq; int ret; @@ -205,9 +205,11 @@ static int sun20i_gpadc_probe(struct platform_device *pdev) if (IS_ERR(info->regs)) return PTR_ERR(info->regs); - clk = devm_clk_get_enabled(dev, NULL); - if (IS_ERR(clk)) - return dev_err_probe(dev, PTR_ERR(clk), "failed to enable bus clock\n"); + ret = devm_clk_bulk_get_all_enabled(dev, &clks); + if (ret < 0) + return dev_err_probe(dev, ret, "failed to enable clocks\n"); + if (ret == 0) + return dev_err_probe(dev, -ENODEV, "needs at least one clocks\n"); rst = devm_reset_control_get_exclusive(dev, NULL); if (IS_ERR(rst)) @@ -243,6 +245,7 @@ static int sun20i_gpadc_probe(struct platform_device *pdev) static const struct of_device_id sun20i_gpadc_of_id[] = { { .compatible = "allwinner,sun20i-d1-gpadc" }, + { .compatible = "allwinner,sun55i-a523-gpadc" }, { } }; MODULE_DEVICE_TABLE(of, sun20i_gpadc_of_id); From patchwork Sat May 16 05:34:16 2026 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Piekos X-Patchwork-Id: 2260 Return-Path: X-Original-To: noreply@patchwork.local Delivered-To: noreply@patchwork.local Received: from sto.lore.kernel.org (sto.lore.kernel.org [172.232.135.74]) by mxe881.netcup.net (Postfix) with ESMTPS id BD39C1C07AB for ; Sat, 16 May 2026 07:35:18 +0200 (CEST) Authentication-Results: mxe881; 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Received: from [91.102.182.218] (helo=localhost) by s106.cyber-folks.pl with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.99.3) (envelope-from ) id 1wO7g6-0000000GeOG-2UNT; Sat, 16 May 2026 07:35:10 +0200 From: Michal Piekos Date: Sat, 16 May 2026 07:34:16 +0200 Subject: [PATCH v3 3/3] arm64: dts: allwinner: a523: add gpadc node Precedence: bulk X-Mailing-List: linux-sunxi@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20260516-sunxi-a523-gpadc-v3-3-a3a04cff2620@mmpsystems.pl> References: <20260516-sunxi-a523-gpadc-v3-0-a3a04cff2620@mmpsystems.pl> In-Reply-To: <20260516-sunxi-a523-gpadc-v3-0-a3a04cff2620@mmpsystems.pl> To: Jonathan Cameron , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Maksim Kiselev Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, Michal Piekos X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1778909655; l=1351; i=michal.piekos@mmpsystems.pl; s=20260301; h=from:subject:message-id; bh=xWAvvoMq5LCEzQv/vm2HNnTrN5pD+nZbb55gDWJixMI=; b=2qjIp0RnVxwHNmNSMtJtEiN2QANkFEmCQkeYhsi7Mz70uOvrLUZAydlbFraE3WD6vXjLt2R+z adkBULC9lWWCOjNv5jvr8IoAPytXTlgPLQelQQmd1Kuf31FX2PIurvV X-Developer-Key: i=michal.piekos@mmpsystems.pl; a=ed25519; pk=Aixyx03If7ZDamiKKN0lsa+0mtA+WjIuIf2ZQVYNBqg= X-Authenticated-Id: michal.piekos@mmpsystems.pl X-MORS-Enabled: yes X-MORS-DOMAIN: patchwork.local X-MORS-HOSTING: hosting172546 X-MORS-USER: hosting172546 X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= Describe GPADC block on Allwinner A523. Tested on Radxa Cubie A5E: - 2 connected channels are showing voltages in agreement with schematics. BOOT-SEL-ADC ~500mV BOM-ADC ~1800mV - 3rd channel exposed on 40pin header is showing correct voltages when connected to known voltage source. Signed-off-by: Michal Piekos --- arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi index 5afa8d92acbf..fdb60539aa6a 100644 --- a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi +++ b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi @@ -340,6 +340,19 @@ ledc: led-controller@2008000 { status = "disabled"; }; + gpadc: adc@2009000 { + compatible = "allwinner,sun55i-a523-gpadc"; + reg = <0x2009000 0x400>; + clocks = <&ccu CLK_BUS_GPADC0>, <&ccu CLK_GPADC0>; + clock-names = "bus", "mod"; + resets = <&ccu RST_BUS_GPADC0>; + interrupts = ; + #io-channel-cells = <1>; + #address-cells = <1>; + #size-cells = <0>; + status = "disabled"; + }; + wdt: watchdog@2050000 { compatible = "allwinner,sun55i-a523-wdt"; reg = <0x2050000 0x20>;