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[86.58.6.171]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-abef7132491sm123062766b.166.2025.02.26.08.06.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Feb 2025 08:06:56 -0800 (PST) From: Jernej =?UTF-8?B?xaBrcmFiZWM=?= To: Michael Turquette , Stephen Boyd , Chen-Yu Tsai , Samuel Holland , Andre Przywara Cc: Maxime Ripard , Kuba =?UTF-8?B?U3pjem9kcnp5xYRza2k=?= , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev Subject: Re: [PATCH 2/2] clk: sunxi-ng: d1: Add missing divider for MMC mod clocks Date: Wed, 26 Feb 2025 17:06:55 +0100 Message-ID: <8494506.T7Z3S40VBb@jernej-laptop> In-Reply-To: <20250226103734.1252013-3-andre.przywara@arm.com> References: <20250226103734.1252013-1-andre.przywara@arm.com> <20250226103734.1252013-3-andre.przywara@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250226_080659_546777_DF703E29 X-CRM114-Status: GOOD ( 11.18 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Dne sreda, 26. februar 2025 ob 11:37:34 Srednjeevropski standardni =C4=8Das= je Andre Przywara napisal(a): > The D1/R528/T113 SoCs have a hidden divider of 2 in the MMC mod clocks, > just as other recent SoCs. So far we did not describe that, which led > to the resulting MMC clock rate to be only half of its intended value. >=20 > Use a macro that allows to describe a fixed post-divider, to compensate > for that divisor. >=20 > This brings the MMC performance on those SoCs to its expected level, > so about 23 MB/s for SD cards, instead of the 11 MB/s measured so far. >=20 > Fixes: 35b97bb94111 ("clk: sunxi-ng: Add support for the D1 SoC clocks") > Reported-by: Kuba Szczodrzy=C5=84ski > Signed-off-by: Andre Przywara Reviewed-by: Jernej Skrabec Best regards, Jernej