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Fri, 09 Oct 2026 01:46:23 -0700 (PDT) From: Jun Yan To: Adrian Hunter , Ulf Hansson Cc: Jun Yan , linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] mmc: sdhci-of-dwcmshc: downgrade HS200/HS400 clock-reduce message to dev_dbg Date: Fri, 9 Oct 2026 16:46:03 +0800 Message-ID: <20261009084604.385664-1-jerrysteve1101@gmail.com> X-Mailer: git-send-email 2.56.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit dwcmshc_rk3568_set_clock() refuses to lower the bus clock below 52 MHz when the eMMC is in HS200/HS400 mode, since those modes require a minimum 52 MHz bus clock. This is expected behaviour, but it is currently reported at dev_err level and therefore fires on every boot and on every suspend/resume cycle, cluttering the kernel log. Demote the message to dev_dbg so it stays out of the default log while remaining available via dynamic debug. Signed-off-by: Jun Yan --- drivers/mmc/host/sdhci-of-dwcmshc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c index c688f3eaf468..b4fb1c1e6d99 100644 --- a/drivers/mmc/host/sdhci-of-dwcmshc.c +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c @@ -790,7 +790,7 @@ static void dwcmshc_rk3568_set_clock(struct sdhci_host *host, unsigned int clock if (clock <= 52000000) { if (host->mmc->ios.timing == MMC_TIMING_MMC_HS200 || host->mmc->ios.timing == MMC_TIMING_MMC_HS400) { - dev_err(mmc_dev(host->mmc), + dev_dbg(mmc_dev(host->mmc), "Can't reduce the clock below 52MHz in HS200/HS400 mode"); goto enable_clk; } -- 2.56.0