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[2a01:c22:76c9:eb00::e63]) by smtp.googlemail.com with ESMTPSA id m17-20020a50c191000000b004af6a840f21sm209208edf.15.2023.02.22.13.04.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Feb 2023 13:04:40 -0800 (PST) From: Martin Blumenstingl To: linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, jirislaby@kernel.org, neil.armstrong@linaro.org, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, gregkh@linuxfoundation.org, Christian Hewitt , Martin Blumenstingl Subject: [PATCH v1 RFC 1/3] dt-bindings: serial: amlogic,meson-uart: Add compatible string for G12A Date: Wed, 22 Feb 2023 22:04:23 +0100 Message-Id: <20230222210425.626474-2-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230222210425.626474-1-martin.blumenstingl@googlemail.com> References: <20230222210425.626474-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Amlogic G12A SoCs gained a new "divide XTAL by 2" bit. Everything else (we know about) is identical to the UART IP on GX (GXBB/GXL/GXM) SoCs. Add a new compatible string for this SoC so this new bit can be managed accordingly. Signed-off-by: Martin Blumenstingl --- Why am I sending this as RFC? The last change in this series means that the resulting .dtbs are not compatible with old kernels anymore. My understanding is that this is fine and only the opposite case (using old .dtbs on new kernels) has to be supported (which is still the case with this series). I'd like to get some confirmation for this. .../devicetree/bindings/serial/amlogic,meson-uart.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml index 7822705ad16c..3d9d51389171 100644 --- a/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml +++ b/Documentation/devicetree/bindings/serial/amlogic,meson-uart.yaml @@ -29,6 +29,7 @@ properties: - amlogic,meson8-uart - amlogic,meson8b-uart - amlogic,meson-gx-uart + - amlogic,meson-g12a-uart - amlogic,meson-s4-uart - const: amlogic,meson-ao-uart - description: Everything-Else power domain UART controller @@ -37,6 +38,7 @@ properties: - amlogic,meson8-uart - amlogic,meson8b-uart - amlogic,meson-gx-uart + - amlogic,meson-g12a-uart - amlogic,meson-s4-uart reg: From patchwork Wed Feb 22 21:04:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Martin Blumenstingl X-Patchwork-Id: 655820 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C8EBCC6379F for ; Wed, 22 Feb 2023 21:05:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232441AbjBVVFj (ORCPT ); Wed, 22 Feb 2023 16:05:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37356 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232664AbjBVVF1 (ORCPT ); Wed, 22 Feb 2023 16:05:27 -0500 Received: from mail-ed1-x530.google.com (mail-ed1-x530.google.com [IPv6:2a00:1450:4864:20::530]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C86C746098; Wed, 22 Feb 2023 13:04:55 -0800 (PST) Received: by mail-ed1-x530.google.com with SMTP id i34so10460797eda.7; Wed, 22 Feb 2023 13:04:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=D4sT1wUlCbHRDpbMzMMTT4BWgWGszScqpQQPPR7Avx8=; b=fV1pXve6qVGgUZzvzS3Cvik+RMpTsqvE0467NRn8Yb6V7KweUNBEWo4/q30yGcFc9w D+rYJdf2EukzBDNH1v7G086P4Dv9oonD3XT2xLE1mdfg9C347zfJ0wMXCy5hhBVc14pH SBV+mro6+fG+QnaFP472RGso/v2hRpfnF2P7WuV8kfWU8Mqe0zirTpHBCeHrXRTAHwWJ RQO/Z478Q5BdO51H3sh6xqDR5tX03sOJMgzlLDVjzSY+1gQ3jogJjmrdqQLm9kBjMb+q SFu0bUnQ2TzX+kKa6RHt1qzdrPhfdrIk/LHxw6OAiSEcMmw0Xg9bjFXjEbqvTChMmY4Y utgg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=D4sT1wUlCbHRDpbMzMMTT4BWgWGszScqpQQPPR7Avx8=; b=fv5Uf75FMukdHEBbzAiMOhtkcrxr/kmifSpZTek3eFnC8gBEsBTPOvlddgDoZwdTKj gn5jK15xyWKx4eYLlYKiDnQZj0TSHJB5FUfBEeJLomJk0sgUlLYSdklX4VX+bzur25XM 4Yt482iZ/ZPxdjkvN/VqSsZ+QmQtExdshsVCMlvMugAs25Upe2/7s0jLNZXmz+WsGNBp XHLeiC99s3s5/Gvda7g/NpTqfVH8XrjGA4OiXgXtq79wbXGFHJdGyiu8SFQ4G0DsnYwZ ZsrCNAnoyGDU9/KtgehQGVkgepEDdS1mQ+JXdzh8aH2yS3+kIE+Z49OErbMeFQR/emyO Illw== X-Gm-Message-State: AO0yUKUhbmAQDV1f6WWmLyzkEVL9gQS4y9TU0fICvAoDZ0XwiL+9vOgg zI5Ca2mZ5ZAxxk/S0J3DRZc= X-Google-Smtp-Source: AK7set9UsywGgwcaKfpjQbvcN4DriltaAx6XT6S28Ki/RySsfHBlPZPWUAWYQaHmEPazeYrWLX5orw== X-Received: by 2002:aa7:db44:0:b0:4ac:b309:3d76 with SMTP id n4-20020aa7db44000000b004acb3093d76mr9530208edt.31.1677099882731; Wed, 22 Feb 2023 13:04:42 -0800 (PST) Received: from localhost.localdomain (dynamic-2a01-0c22-76c9-eb00-0000-0000-0000-0e63.c22.pool.telefonica.de. [2a01:c22:76c9:eb00::e63]) by smtp.googlemail.com with ESMTPSA id m17-20020a50c191000000b004af6a840f21sm209208edf.15.2023.02.22.13.04.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Feb 2023 13:04:42 -0800 (PST) From: Martin Blumenstingl To: linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, jirislaby@kernel.org, neil.armstrong@linaro.org, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, gregkh@linuxfoundation.org, Christian Hewitt , Martin Blumenstingl Subject: [PATCH v1 RFC 3/3] arm64: dts: meson-g12-common: Use the G12A UART compatible string Date: Wed, 22 Feb 2023 22:04:25 +0100 Message-Id: <20230222210425.626474-4-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230222210425.626474-1-martin.blumenstingl@googlemail.com> References: <20230222210425.626474-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Switch meson-12-common.dtsi to use the Meson G12A specific UART compatible string. This enables the "divide XTAL by 2" divider which improves support for UART attached Bluetooth modules (for example RTL8822CS) running at a baud rate of 1500000. Without dividing XTAL (24MHz) by 2 a baud rate of 1500000 cannot be generated cleanly and the resulting jitter breaks communication with the module. Tested-by: Christian Hewitt Signed-off-by: Martin Blumenstingl --- arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi index 123a56f7f818..3dc06848f3c4 100644 --- a/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-g12-common.dtsi @@ -2046,7 +2046,7 @@ pwm_AO_cd: pwm@2000 { }; uart_AO: serial@3000 { - compatible = "amlogic,meson-gx-uart", + compatible = "amlogic,meson-g12a-uart", "amlogic,meson-ao-uart"; reg = <0x0 0x3000 0x0 0x18>; interrupts = ; @@ -2056,7 +2056,7 @@ uart_AO: serial@3000 { }; uart_AO_B: serial@4000 { - compatible = "amlogic,meson-gx-uart", + compatible = "amlogic,meson-g12a-uart", "amlogic,meson-ao-uart"; reg = <0x0 0x4000 0x0 0x18>; interrupts = ; @@ -2293,7 +2293,7 @@ clk_msr: clock-measure@18000 { }; uart_C: serial@22000 { - compatible = "amlogic,meson-gx-uart"; + compatible = "amlogic,meson-g12a-uart"; reg = <0x0 0x22000 0x0 0x18>; interrupts = ; clocks = <&xtal>, <&clkc CLKID_UART2>, <&xtal>; @@ -2302,7 +2302,7 @@ uart_C: serial@22000 { }; uart_B: serial@23000 { - compatible = "amlogic,meson-gx-uart"; + compatible = "amlogic,meson-g12a-uart"; reg = <0x0 0x23000 0x0 0x18>; interrupts = ; clocks = <&xtal>, <&clkc CLKID_UART1>, <&xtal>; @@ -2311,7 +2311,7 @@ uart_B: serial@23000 { }; uart_A: serial@24000 { - compatible = "amlogic,meson-gx-uart"; + compatible = "amlogic,meson-g12a-uart"; reg = <0x0 0x24000 0x0 0x18>; interrupts = ; clocks = <&xtal>, <&clkc CLKID_UART0>, <&xtal>;