From nobody Thu Dec 18 22:36:24 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 1100B1C9EAA; Wed, 19 Mar 2025 14:26:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742394377; cv=none; b=Zdlqx8gX7GGztCBxOViFmTeAXmohIj6ctx3obPvoyM76+3/viyU07PqlIkwwQmAg6P+AXM4iWOX//iA+5f6/w1dTzsFovMmI7Qq8RFQWr52eiOEdveOdDQaiRoRS5SoeGDKk00FfSKqIP53hGguUMyZgFWLPMMzcfBeM17ligzg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742394377; c=relaxed/simple; bh=85SNvPgvlH/GTxa9y+gugKmDHhXkflhLM6OsnTIZgQ8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=eTCDGKL49ugAUmY8SJC9quqGjhQyMDpWt3+8o4JYr3e6VG5jr4MXkkWkBsA2bs6VxrX7gHd/n/L5fyrzx4GqOEOxaBdhgGU8P+90Yot2S39J9n4uHAnoN1RJ0lsnfzIMQOPejdPKSyDEExYnXfW9du+Im6eOhWSKTWD9PQ0iWKI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PLElYh9m; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PLElYh9m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 382EBC4CEEE; Wed, 19 Mar 2025 14:26:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1742394376; bh=85SNvPgvlH/GTxa9y+gugKmDHhXkflhLM6OsnTIZgQ8=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=PLElYh9mOKV/D6o5H/0LPmmCHC6+ydrcer3092ORziYL74imo3u2+YCr3HTZQqVVh cLObop0b7zviL15ZZ4qV25xMUGuspY4yfVMGI4pPXG0FmAPGtcdWswhRnLOQqI8MJQ dXcOOkLwNgCb6fxvYZxXteZa1RWMq9XmG9JSazG9zad4mat+/W0kF9StO6BZ1AqsAd s7NuAWpctvBRg8ueLSBj8adezLKhX19Xcme6Iwez65XDmZ+IS089BFjTRT74Ke+mnD WS7t+RNT3O2X9/AIjDxKyq5iRN47EAbLFio1kkNWiA8qMXIkKXlE2Qj6GFZ1EnWSSX ZeJwbezgLV5ww== From: Konrad Dybcio Date: Wed, 19 Mar 2025 15:25:58 +0100 Subject: [PATCH 2/2] of: address: Allow to specify nonposted-mmio per-device 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: <20250319-topic-nonposted_mmio-v1-2-dfb886fbd15f@oss.qualcomm.com> References: <20250319-topic-nonposted_mmio-v1-0-dfb886fbd15f@oss.qualcomm.com> In-Reply-To: <20250319-topic-nonposted_mmio-v1-0-dfb886fbd15f@oss.qualcomm.com> To: Rob Herring , Saravana Kannan Cc: Bjorn Andersson , Melody Olvera , Marijn Suijten , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1742394367; l=1142; i=konrad.dybcio@oss.qualcomm.com; s=20230215; h=from:subject:message-id; bh=y0+qWRNj3lsLNFcFdTqYiv2iqNp+DnBmvGNXCkwjQPs=; b=q/IA7Pig2c6uLp+qOjzt6OBMjX2S94U8+3a2kv8zNQMo3xTgbUSF7umlrVJl/Sn1ujeveIsOv NZN2ymSUt9UCouX0w+8xgZFCpY4wPeVjj8M3pN3tT2Fpr0bt6RbOFz9 X-Developer-Key: i=konrad.dybcio@oss.qualcomm.com; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= From: Konrad Dybcio Certain IP blocks may strictly require/expect a nE mapping to function correctly, while others may be fine without it (which is preferred for performance reasons). Allow specifying nonposted-mmio on a per-device basis. Signed-off-by: Konrad Dybcio --- drivers/of/address.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/of/address.c b/drivers/of/address.c index 2041ea112ded70e11d3831b403901c36c8c29a93..f0f8f0dd191cfe05dfc29246da5= fe665d5fb9c6e 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -1035,10 +1035,11 @@ EXPORT_SYMBOL_GPL(of_dma_is_coherent); static bool of_mmio_is_nonposted(const struct device_node *np) { struct device_node *parent __free(device_node) =3D of_get_parent(np); - if (!parent) - return false; =20 - return of_property_read_bool(parent, "nonposted-mmio"); + if (of_property_read_bool(np, "nonposted-mmio")) + return true; + + return parent && of_property_read_bool(parent, "nonposted-mmio"); } =20 static int __of_address_to_resource(struct device_node *dev, int index, in= t bar_no, --=20 2.48.1