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(unknown [109.120.22.104]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20260228062025epsmtip2d7252c306b207bd8913d19341d370c49~YVL07h2261538715387epsmtip2q; Sat, 28 Feb 2026 06:20:25 +0000 (GMT) From: "ping.gao" To: ulf.hansson@linaro.org, jh80.chung@samsung.com Cc: shawn.lin@rock-chips.com, krzk@kernel.org, krzk+dt@kernel.org, robh@kernel.org, conor+dt@kernel.org, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, kwangwon.min@samsung.com, hy50.seo@samsung.com, Ping Gao Subject: [PATCH v4 2/3] mmc: dw_mmc-k3: before set biu_clk rate, check biu_clk available or not Date: Sat, 28 Feb 2026 14:24:56 +0800 Message-ID: <20260228062457.3210099-3-ping.gao@samsung.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20260228062457.3210099-1-ping.gao@samsung.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CMS-MailID: 20260228062025epcas5p2404df86646abdbe307bd792d339dd350 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P X-CMS-RootMailID: 20260228062025epcas5p2404df86646abdbe307bd792d339dd350 References: <20260228062457.3210099-1-ping.gao@samsung.com> From: Ping Gao If biu_clk is not available, no need to try to set and get rate of it, just bail out and print a warning Signed-off-by: Ping Gao --- drivers/mmc/host/dw_mmc-k3.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c index ad6aa1aea549..ccb6bfe3e0ce 100644 --- a/drivers/mmc/host/dw_mmc-k3.c +++ b/drivers/mmc/host/dw_mmc-k3.c @@ -190,6 +190,11 @@ static void dw_mci_hi6220_set_ios(struct dw_mci *host, struct mmc_ios *ios) int ret; unsigned int clock; + if (IS_ERR_OR_NULL(host->biu_clk)) { + dev_err(host->dev, "biu_clk not available\n"); + return; + } + clock = (ios->clock <= 25000000) ? 25000000 : ios->clock; ret = clk_set_rate(host->biu_clk, clock); -- 2.50.1