From nobody Sat Oct 11 08:23:24 2025 Received: from mail-pl1-f169.google.com (mail-pl1-f169.google.com [209.85.214.169]) (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 2EF9B283CAA for ; Wed, 11 Jun 2025 12:59:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.169 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749646795; cv=none; b=j67+vRYtKuEhAAqtogCv0Emow92DYEB+RXgikrgMW1k8O+wW6RwfoUu24UkGUf9Q3c405CqFPZ/TCOV2e9r6fA22wm9St8LzZGuqlRwokXl1qBshyuVbFcqKBfl3PqsvYsrioFlz5co5m1DJWQNNMeSuPpGdRjYXkDbp7ANxbp4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749646795; c=relaxed/simple; bh=w3tQqbAHCuIlmTn7bB97ckFjqMR0odxo/xEDlJG2tEI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ujTjT4XcdZE8CxWTLh6UkyofNt+nk+p9qyJEdZPtZrpFHek2KhjKn9xCIz0rZ7oLxMxzJBKaghB+V7lEU6TmlWnH6LO+GKdTc+8vkOQZtVo2BEVikdANp6yiq/8Wxu+j68u/ZEA2bzuILO6mZGauExj68GDIlkhun8e9QCggzZA= 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=kCiWSF46; arc=none smtp.client-ip=209.85.214.169 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="kCiWSF46" Received: by mail-pl1-f169.google.com with SMTP id d9443c01a7336-234c5b57557so62586665ad.3 for ; Wed, 11 Jun 2025 05:59:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=riscstar-com.20230601.gappssmtp.com; s=20230601; t=1749646791; x=1750251591; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=7o24DxeXgIvRNvf36TN4y++evYbOInZZuq385XvrXzk=; b=kCiWSF46Pjz/6TAZmn0K0JgMhTH6SCSjTVn+NCUT8ACm1eY6unJAgMzpZCW26iH7V2 +/1NOtnj+4Y52szSohkiAN8156HtI5rel5FMnjKOnHnmaf+x2xW9wmKHloS+5ZCPjILt s/QWJA5KciHgLhcLGcI0kFAA58xF66RqbLMeWAeHgCxekbTcOPqkX+K8gvst8G9GB4hX V4p8KFyWAzOfkwWQHq5qw80zTNyvBweOkAkiWumMd6+e44ccawVDr9qXyLJnrma+YwJI m/7GyX2hPLaVbRqG699OHVdHSFAyV5y5AMY63xrDu0aBGrVw08ijZa57i42HGZ6OaTms NZAg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749646791; x=1750251591; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=7o24DxeXgIvRNvf36TN4y++evYbOInZZuq385XvrXzk=; b=pTp5OrMJxAQSrvvMIQU3GHdCZjZOVwNI5xhdr2gTusMHBBTyxwFLVrFqEYS340BANH xt0KbeHS17gObOFN6aOZIrTfE+hzDybAAZ2gVXbE4aHctkhRCuVMvjgmTL39bdL6PLTd 6sIaDDWGcIQB4Yftf7MISpE3xLxyUbD3/y+ngPJ8BNDJoXjqWJCua52akfIngpyG6qRB LkTSHVHgCMjIuxi4iufKCPb6tR29MYNEp8mvfpv7wQdBDVltO3PcCiWtfCDq40NCNsRD KblZ2we8kdJlfiqW9rigeVzxgGbsPFgUFXaB7Du6s2HnP1rnVe7F8G+wbBmzQqc2H4OQ GT3A== X-Forwarded-Encrypted: i=1; AJvYcCU2CuhPbwwQTkrJcrKGKk/0ESCLURFJFtP4tiNEhOeNVaJmSBTiheN+Y/nyxofK31cgihQoyUCJQy8nSfg=@vger.kernel.org X-Gm-Message-State: AOJu0YwPt8+6s8OBfSP0em/Gc7W2NLwXlQ9ELwgwqqZipy2llW8IQ8b6 T2lf9fJQwqMIyUCzDpevd1Ch5xjV9LpOT9F+1VGrgLKqWqSNO+YjCjPjBpmhFbNLxSY= X-Gm-Gg: ASbGnctme/jR+5HVPkJ9wVk2s0qSH1TnXJwXXNRt1wIyWfmznJLm85bs0p04cgZEs3B ngpPi8madjBvZUDIZEP6fASB9I0SWiG1BFK6+wiVGR0n3oEAM6BlaRiTOniScqPiSduUVp/jrG7 yfXzj47sEvT0wFjrW7C5zJEhHq3Dgx9qUh7ua8ahR6buCVrmzvq8iYVc0+xf6/k00e5iAt4C8lD CwaJQcKbreicp4VMnPZsP9SjhxIW0uNsfLv0Ek9P7g+OS49dPtb+UC5q3s4/3DezvIT0iowMz6Y ITvg0kpm4m96QVwZrLlxhQnHskE0Jy3Qpe8FqxR38uTWgFwqkh6aAy4YmRT6aI2EcrgiJ3S5BwS KTPfgTjwxDT2hr8b1+09h2185EzYMM5bS X-Google-Smtp-Source: AGHT+IH7USNXfR5sNsfQYnJhCwki/U4RwupJq6yD1CeMplQGSscMAoiL9MAMbLTMCcEmy+9woSzN4g== X-Received: by 2002:a17:902:f70f:b0:234:a139:1203 with SMTP id d9443c01a7336-23642683ebfmr42207415ad.32.1749646791610; Wed, 11 Jun 2025 05:59:51 -0700 (PDT) Received: from localhost.localdomain ([2409:8a00:31a4:6520:3d67:ceb1:7c60:9098]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-236030925e3sm86984115ad.53.2025.06.11.05.59.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Jun 2025 05:59:51 -0700 (PDT) From: Guodong Xu To: vkoul@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, dlan@gentoo.org, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, p.zabel@pengutronix.de, drew@pdp7.com, emil.renner.berthing@canonical.com, inochiama@gmail.com, geert+renesas@glider.be, tglx@linutronix.de, hal.feng@starfivetech.com, joel@jms.id.au, duje.mihanovic@skole.hr Cc: guodong@riscstar.com, elder@riscstar.com, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev Subject: [PATCH 3/8] dma: mmp_pdma: Add optional reset controller support Date: Wed, 11 Jun 2025 20:57:18 +0800 Message-ID: <20250611125723.181711-4-guodong@riscstar.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250611125723.181711-1-guodong@riscstar.com> References: <20250611125723.181711-1-guodong@riscstar.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add support for hardware reset control in the MMP PDMA driver using the devm_reset_control_get_optional_exclusive_deasserted() API. The reset controller is retrieved without a specific reset name, allowing platforms to define a single default reset line for the PDMA controller. Signed-off-by: Guodong Xu --- 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 4a6dbf558237..fe627efeaff0 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