From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailout1.samsung.com (mailout1.samsung.com [203.254.224.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7E4CD23F422 for ; Fri, 13 Feb 2026 05:29:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=203.254.224.24 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770960593; cv=none; b=m9cv1dMgvT5jRH0VfhEOvalg4Ukp9eIHq+hKLkIE6I1CB033MTfV6/zlWBf+9Afu2L+i4lWZEHgaYwFjsN1ELXjB6kCtWKZ4mH/hNKvalp5DyH3piuxS4Q5io7Otyx4mZNQaXJJtyEFDBzBBbYsZV1fp8aTM1uHSg7dkQl86BwU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770960593; c=relaxed/simple; bh=F4tQQkzBrzU9fZ5dYE8kk1gKIKu+hWiJk94DdfzvXeA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:MIME-Version: Content-Type:References; b=JamdE0C8m4hJBXyZlvChxFD60E7hayybnhSalIE8Gl0qai27JuRBidi74GT2SkxJgy3EqJ9LPoJlrjCZ7lK2umcPE/2vLiCBRASFHl2L/IFl7q3Wh+TFf6qZRpq+lEXGgDQjY0Cvt3WFp51ZsPn9+xxYLQpkQJmGKeD1zDyw4e0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com; spf=pass smtp.mailfrom=samsung.com; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b=ZnnfNKTc; arc=none smtp.client-ip=203.254.224.24 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=samsung.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=samsung.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=samsung.com header.i=@samsung.com header.b="ZnnfNKTc" Received: from epcas5p1.samsung.com (unknown [182.195.41.39]) by mailout1.samsung.com (KnoxPortal) with ESMTP id 20260213052950epoutp01e2a585d8332bbd4335b55572b2ea0fb8~Tt0YvvOKt0836908369epoutp01G for ; Fri, 13 Feb 2026 05:29:50 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.samsung.com 20260213052950epoutp01e2a585d8332bbd4335b55572b2ea0fb8~Tt0YvvOKt0836908369epoutp01G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1770960590; bh=NKlEeBlORou6wmvrVXmRL8chQkBnSsA/MrUDnxAkAwU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZnnfNKTcheO1b86ulFJRmNTnmY+J/Ye5KsNDPdVwEJ9hxVMIzl8SJa3DBsohSWTPs nSPoYIBXngXU7vdwjanuxrJFnc9/xvHucARfduqwjadhJK4SxHFvEqYI//LjBsLV83 cyTvpV02rV+QggjEmOIZi9AcUcyFDZlpQkUNfBKs= Received: from epsnrtp01.localdomain (unknown [182.195.42.153]) by epcas5p1.samsung.com (KnoxPortal) with ESMTPS id 20260213052950epcas5p14e94a890d904bdb87c3a5012fd8ac490~Tt0YYd90l0690906909epcas5p1W; Fri, 13 Feb 2026 05:29:50 +0000 (GMT) Received: from epcas5p3.samsung.com (unknown [182.195.41.41]) by epsnrtp01.localdomain (Postfix) with ESMTP id 4fC12Q0zYBz6B9mJ; Fri, 13 Feb 2026 05:29:50 +0000 (GMT) Received: from epsmtip2.samsung.com (unknown [182.195.34.31]) by epcas5p3.samsung.com (KnoxPortal) with ESMTPA id 20260213052949epcas5p3d0e2840f82700a847e899dc3eeac466c~Tt0X10DAd1071110711epcas5p3S; Fri, 13 Feb 2026 05:29:49 +0000 (GMT) Received: from hzsscr.. (unknown [109.120.22.104]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20260213052949epsmtip22e1c835a9877129cc795d298c68de6cb~Tt0XTjPIe1200512005epsmtip2O; Fri, 13 Feb 2026 05:29:48 +0000 (GMT) From: "ping.gao" To: shawn.lin@rock-chips.com, ulf.hansson@linaro.org, jh80.chung@samsung.com, sebastian.reichel@collabora.com, ping.gao@samsung.com Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, hy50.seo@samsung.com, kwangwon.min@samsung.com Subject: [PATCH v3 2/3] mmc: dw_mmc-k3: before set biu_clk rate, check biu_clk available or not Date: Fri, 13 Feb 2026 13:34:31 +0800 Message-ID: <20260213053431.1337556-1-ping.gao@samsung.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: 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: 20260213052949epcas5p3d0e2840f82700a847e899dc3eeac466c X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" CMS-TYPE: 105P X-CMS-RootMailID: 20260123085150epcas5p42f2cc04843ae7657380b2968261246cb References: If biu_clk is not available, no need 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