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[78.11.189.27]) by smtp.gmail.com with ESMTPSA id e2-20020ac25462000000b004949f7cbb6esm1144703lfn.79.2022.09.05.03.05.49 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 05 Sep 2022 03:05:50 -0700 (PDT) Message-ID: <4e5d2fc2-5816-ba31-6a75-da669eddc5cf@linaro.org> Date: Mon, 5 Sep 2022 12:05:49 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.13.0 Subject: Re: [PATCH 2/4] dt-bindings: arm: mediatek: Add new bindings of MediaTek frequency hopping Content-Language: en-US To: Johnson Wang , robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, angelogioacchino.delregno@collabora.com, sboyd@kernel.org Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Project_Global_Chrome_Upstream_Group@mediatek.com, Edward-JW Yang References: <20220831124850.7748-1-johnson.wang@mediatek.com> <20220831124850.7748-3-johnson.wang@mediatek.com> <67237f85d1c4bc72906848d811988209d0112c06.camel@mediatek.com> From: Krzysztof Kozlowski In-Reply-To: <67237f85d1c4bc72906848d811988209d0112c06.camel@mediatek.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org On 02/09/2022 08:39, Johnson Wang wrote: > On Wed, 2022-08-31 at 16:19 +0300, Krzysztof Kozlowski wrote: >> On 31/08/2022 15:48, Johnson Wang wrote: >>> Add the new binding documentation for MediaTek frequency hopping >>> and spread spectrum clocking control. >>> >>> Co-developed-by: Edward-JW Yang >>> Signed-off-by: Edward-JW Yang >>> Signed-off-by: Johnson Wang >>> --- >>> .../bindings/arm/mediatek/mediatek,fhctl.yaml | 49 >>> +++++++++++++++++++ >>> 1 file changed, 49 insertions(+) >>> create mode 100644 >>> Documentation/devicetree/bindings/arm/mediatek/mediatek,fhctl.yaml >>> >>> diff --git >>> a/Documentation/devicetree/bindings/arm/mediatek/mediatek,fhctl.yam >>> l >>> b/Documentation/devicetree/bindings/arm/mediatek/mediatek,fhctl.yam >>> l >>> new file mode 100644 >>> index 000000000000..c5d76410538b >>> --- /dev/null >>> +++ >>> b/Documentation/devicetree/bindings/arm/mediatek/mediatek,fhctl.yam >>> l >>> @@ -0,0 +1,49 @@ >>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) >>> +%YAML 1.2 >>> +--- >>> +$id: >>> https://urldefense.com/v3/__http://devicetree.org/schemas/arm/mediatek/mediatek,fhctl.yaml*__;Iw!!CTRNKA9wMg0ARbw!ysl-bMp7yP9Ym70o6EVB8A36MBxcXGap8doEKR_SbaAQSy8-_RU5jvrWTjzETut_6eXNGut4j-3dY0q7xJdpQbmaOw$ >>> >>> +$schema: >>> https://urldefense.com/v3/__http://devicetree.org/meta-schemas/core.yaml*__;Iw!!CTRNKA9wMg0ARbw!ysl-bMp7yP9Ym70o6EVB8A36MBxcXGap8doEKR_SbaAQSy8-_RU5jvrWTjzETut_6eXNGut4j-3dY0q7xJezt7_RBw$ >>> >>> + >>> +title: MediaTek frequency hopping and spread spectrum clocking >>> control >>> + >>> +maintainers: >>> + - Edward-JW Yang >>> + >>> +description: | >>> + Frequency hopping control (FHCTL) is a piece of hardware that >>> control >>> + some PLLs to adopt "hopping" mechanism to adjust their >>> frequency. >>> + Spread spectrum clocking (SSC) is another function provided by >>> this hardware. >>> + >>> +properties: >>> + compatible: >>> + const: mediatek,fhctl >> >> You need SoC/device specific compatibles. Preferably only SoC >> specific, >> without generic fallback, unless you can guarantee (while >> representing >> MediaTek), that generic fallback will cover all of their SoCs? >> > > Hi Krzysztof, > > At this moment, we plan to support FHCTL feature for MT8186 only. > > If you prefer SoC-specific compatble, we will improve that in the next > version. Then make it only for mt8186. Best regards, Krzysztof