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AJvYcCXK3Z7wVja74R4Cz2WlZNHHl5DVsG2Se98mxr/iarVFCZSedkmJ8meRh/lSEHMh585LdZUkuEIBmzC9@vger.kernel.org X-Gm-Message-State: AOJu0YzNvb/wk18PJsLujS2+fcXgaZoKGIu/qM+OguE6G2QfOu1tOdka 0fXgOmC2JZoY6UNrzutAs5E4Gi+c2ML5SR8Ab19vZ9Tbm56b4TNWZirAk/YUBCLX4zKFQBKTJwp pShVTL0l9Qzww5Ty/25IK5wpR+srtcWY= X-Gm-Gg: ASbGnctULUqOwjsqJb2G1/lFTH2froXnNDmBLCFsfemwoZmy8tG0M8wi25IEvsRsxYD EQawW6/9/LBbrtIWH02KMkrtjOUgMTWTuCYxa+Bpy0FSd5MQ6L2XGq14X2k/Gwb3UR0vFoumBvd v2yTttTqIHDj40ggtJBMBygxNs48/hcNsTwCJQVO7dW0etfgS3loB+Y6PTmC/ChUUCq2LccrfRO X8SCRwearUw0JBJebD2Lx2VX+y9hntbTuNUujIj+qjX54Gpk4M6yrOs0w5kJiaX X-Google-Smtp-Source: AGHT+IHZCtZVjbJCuCzfkElGQPsDTCoF7VlhCNJzNSACyEYAtAeKcSTNYi1LVTtefd/CGrEn+damOcQNkjX8el2dbLs= X-Received: by 2002:a05:622a:315:b0:4e0:3cdb:d1df with SMTP id d75a77b69052e-4e6ead5c32bmr79013101cf.61.1759999665491; Thu, 09 Oct 2025 01:47:45 -0700 (PDT) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 References: <20250929065714.27741-1-jjm2473@gmail.com> <20250929065714.27741-4-jjm2473@gmail.com> <7e219aef-88a0-4184-9553-30dcbc8dbd79@lunn.ch> In-Reply-To: From: Alexey Charkov Date: Thu, 9 Oct 2025 12:47:36 +0400 X-Gm-Features: AS18NWC2IGY_8LtLG8W701XYpA8RXhJynROI-cfRLT0k9gdCMgBYHBHaIfR9D_Y Message-ID: Subject: Re: [PATCH v3 3/3] arm64: dts: rockchip: add LinkEase EasePi R1 To: Andrew Lunn Cc: jjm2473 , robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, heiko@sntech.de, quentin.schulz@cherry.de, kever.yang@rock-chips.com, naoki@radxa.com, honyuenkwun@gmail.com, inindev@gmail.com, ivan8215145640@gmail.com, neil.armstrong@linaro.org, mani@kernel.org, dsimic@manjaro.org, pbrobinson@gmail.com, didi.debian@cknow.org, jbx6244@gmail.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Tue, Oct 7, 2025 at 10:32=E2=80=AFPM Andrew Lunn wrote: > > > I also notice that you suggest use {tx|rx}-internal-delay-ps instead > > of {tx|rx}_delay in > > https://lore.kernel.org/all/e4d3127b-c879-4931-9ea0-de7449bc508c@lunn.c= h/ , > > but I think this depends on stmmac driver. > > It depends on the driver implementing those standard properties. But > as pointed out elsewhere, tx|rx-delay are magic, nobody knows what > they do, so it is hard to implement the standard properties to replace > them. FWIW, the TRM for Rockchip RK3576 specifies that the values in tx|rx-delay control the number of delay elements in the internal delayline on the transmit and receive clocks, respectively (up to 200 each). There is no mention of the actual delay each delay element introduces, though, so that doesn't get us much closer. Best regards, Alexey