From nobody Tue Oct 7 07:06:25 2025 Received: from mail-wm1-f42.google.com (mail-wm1-f42.google.com [209.85.128.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BEE14244667 for ; Mon, 14 Jul 2025 09:40:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.42 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752486033; cv=none; b=VUOZvAp8VGzoXDqAPKkB3dd84bAxNiuA8kOWYstpHaqjwCPDBHvKC2Fsy4NoYtBaUP3470I2mHPWu4WUgBf/EL6eurAU9Hk51/YBzsgdOznylEWUwRWUV13C2iOj2qGyvWqUisgJrW7tAHvea7w3BkbPPirsIWf03IOCoECIL0I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752486033; c=relaxed/simple; bh=Rnvq7ILXDlYn7NCyNrMKelcmx8kPHn08CJvMC7C4paI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Girg8KdNx5NxsrCghqoXGsy6wA5kCfQgQ+DFLtUCqpzRLFk6d9lDnByuzp0BnEjMyAzCryl4KDzEKXDud9OTXd/z4ulOMrKnczAPSthC8LY0Y6e6b9loLcE/Won0hSbPjcZOHF51IbPypKH4/r6CzLRfMU8f5c4oWwWiHn9Kpgc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=riscstar.com; spf=pass smtp.mailfrom=riscstar.com; dkim=pass (2048-bit key) header.d=riscstar-com.20230601.gappssmtp.com header.i=@riscstar-com.20230601.gappssmtp.com header.b=05u/1uny; arc=none smtp.client-ip=209.85.128.42 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=riscstar.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=riscstar.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=riscstar-com.20230601.gappssmtp.com header.i=@riscstar-com.20230601.gappssmtp.com header.b="05u/1uny" Received: by mail-wm1-f42.google.com with SMTP id 5b1f17b1804b1-4560d176f97so15492805e9.0 for ; Mon, 14 Jul 2025 02:40:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=riscstar-com.20230601.gappssmtp.com; s=20230601; t=1752486030; x=1753090830; darn=vger.kernel.org; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=OERStMpxFd1oXz1mhimWCIXZsdyaGxN/N1YtYf02ffU=; b=05u/1unyDoWhpxfJaRp+DbVH5Z0MtRjys9KbOZbfg79QZdu43Kw2d+5pSUJNjOZuaq RahcbRYqgMX4o1cE7jUWsvHOqoretF0xNkKn5ruS9in2tJr5yiII+37lVHAqRIzqqyHu atvoYyMIMpe5rM1oit5kwKkwP/yHscYF8xV05d/Fy4kdctxn8BIUZahGaN96lVJaJcCh BFHWqO+tj1KrViutmDyKAeX4t5A+MwbA3TKR9ec068GI6n7USDOYZCKCgkv5Hojd+y5+ dPDtXLfaU5GYTmMhBk72/zRZleKlw5dwwzNiUrcDK+VW0z1eSfdXAvGEN12nyE+1/Tki vaEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1752486030; x=1753090830; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=OERStMpxFd1oXz1mhimWCIXZsdyaGxN/N1YtYf02ffU=; b=R8hLM9JLvIDJ/DtfTK5aDRr93kEHC5EQeUEEWTf9zkUEK8WI/xUz7vGoNNhlaLi3Ih +JrcBT0IdMSdrsBdVAIKn6Nc56SFpdJYUSu3JIBxKPqHF17v/gnAhJHhc90T5VcZ9er/ HnqFYjo/ez+r7PLtSri/gMhXrbl6tEPTAGlOsWhCdUUNEATEQm9YzpwRHpOU0YmmPC0X xnFpG1YdYdHBWFk5R846o4E6zVA2Dc6Kb0mLi7kzNi5P/Rsc+OP68Jut/1sUSAvSPoBO aytJCvgn1r3ekx/adCI1xt9Vsms849G8mQD8OwI9rNmKMBxWLgDhuMSNsOvi/AQkzwY2 wzlw== X-Forwarded-Encrypted: i=1; AJvYcCWE2oyIKuzG4XVxM16zVmXQFEowfOvbv4dK2AV5yyAfDC7RixDnNGTO1liMOoj92IHGnf4p6XdVuYweE7k=@vger.kernel.org X-Gm-Message-State: AOJu0YzNC2YbXYQ3cRTqEXzDDp0zE1c9DdjrYL4jumQBvIPLnn02VisY 81l92FnSgnTn3NV2ORRqHaB5PegDNzWoCEpjvPKGeL5lnubnWdru9Yo1gNwtvSMdobE= X-Gm-Gg: ASbGncvtfQkuKLKP5gJE5PmJlfx7L3uw+E+mJ/5AVSxeaIcsvQWtZI0F0+jisLAkUad kCkrmv1DI8vaao9BCd8SSj+wf91ScLVQjIFob1Fewz2cQXsbKc1raY87v9/bTMwZDOSbix64f6G APZ/do01tjA4hQh8bRhXVgjZyX0P1iIkXRrSJiBXDohxbRSOfdFb2r+GzWUuLD/aBPE2pt9tj3k Q5W8efphfCVB705R3fK/Zw04nz5d5ZIH/k/8C8iTHE7FJqpp+2kJH5XRdcmBQckIcSIBc+sSbeP VG2uTn1F+nqVIA13RRQ3UZNOesZcrqJomsSxMXy99y4sjFyli235WtI0TPTYcLCqFcudNItoAA= = X-Google-Smtp-Source: AGHT+IFjyUYE1dOQ8JxazLI7iDjsE8P/QTDlCi2i9qu5IYfCUbgHi3kKfOduLMWkN27Rdg061Q9fig== X-Received: by 2002:a05:600c:a08e:b0:453:745:8534 with SMTP id 5b1f17b1804b1-454ec128c22mr110575145e9.12.1752486030219; Mon, 14 Jul 2025 02:40:30 -0700 (PDT) Received: from [127.0.1.1] ([2a09:0:1:2::3035]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4561b25a948sm24989035e9.35.2025.07.14.02.40.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 14 Jul 2025 02:40:29 -0700 (PDT) From: Guodong Xu Date: Mon, 14 Jul 2025 17:39:30 +0800 Subject: [PATCH v3 3/8] dmaengine: mmp_pdma: Add optional reset controller support Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250714-working_dma_0701_v2-v3-3-8b0f5cd71595@riscstar.com> References: <20250714-working_dma_0701_v2-v3-0-8b0f5cd71595@riscstar.com> In-Reply-To: <20250714-working_dma_0701_v2-v3-0-8b0f5cd71595@riscstar.com> To: Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Yixun Lan , =?utf-8?q?Duje_Mihanovi=C4=87?= , Philipp Zabel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: Alex Elder , Vivian Wang , dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, Guodong Xu X-Mailer: b4 0.14.2 Add support to acquire and deassert an optional hardware reset controller during mmp_pdma_probe(). Signed-off-by: Guodong Xu --- v3: No change. v2: No change. --- drivers/dma/mmp_pdma.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c index 4a6dbf55823722d26cc69379d22aaa88fbe19313..fe627efeaff07436647f86ab5ec= 5333144a3c92d 100644 --- a/drivers/dma/mmp_pdma.c +++ b/drivers/dma/mmp_pdma.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include =20 @@ -1021,6 +1022,7 @@ static int mmp_pdma_probe(struct platform_device *op) struct mmp_pdma_device *pdev; struct mmp_dma_platdata *pdata =3D dev_get_platdata(&op->dev); struct clk *clk; + struct reset_control *rst; int i, ret, irq =3D 0; int dma_channels =3D 0, irq_num =3D 0; const enum dma_slave_buswidth widths =3D @@ -1043,6 +1045,11 @@ static int mmp_pdma_probe(struct platform_device *op) if (IS_ERR(clk)) return PTR_ERR(clk); =20 + rst =3D devm_reset_control_get_optional_exclusive_deasserted(pdev->dev, + NULL); + if (IS_ERR(rst)) + return PTR_ERR(rst); + if (pdev->dev->of_node) { /* Parse new and deprecated dma-channels properties */ if (of_property_read_u32(pdev->dev->of_node, "dma-channels", --=20 2.43.0