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Wed, 16 Sep 2026 00:59:21 -0700 (PDT) Received: from wenst-7875.tpe.corp.google.com ([2a00:79e0:203d:7:1f62:7622:5d61:2578]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39e1b7acba2sm4348197a91.16.2026.09.16.00.59.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Sep 2026 00:59:20 -0700 (PDT) From: Chen-Yu Tsai To: Bartosz Golaszewski , Greg Kroah-Hartman , Andy Shevchenko , Daniel Scally , Heikki Krogerus , Sakari Ailus , "Rafael J. Wysocki" , Danilo Krummrich , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno Cc: Chen-Yu Tsai , linux-acpi@vger.kernel.org, driver-core@lists.linux.dev, linux-pm@vger.kernel.org, linux-usb@vger.kernel.org, devicetree@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Manivannan Sadhasivam , Alan Stern , Manivannan Sadhasivam Subject: [PATCH v9 11/15] power: sequencing: pcie-m2: support matching on remote "port" node Date: Wed, 16 Sep 2026 15:57:37 +0800 Message-ID: <20260916075745.3549953-12-wenst@chromium.org> X-Mailer: git-send-email 2.55.0.1032.g73a4cd73de-goog In-Reply-To: <20260916075745.3549953-1-wenst@chromium.org> References: <20260916075745.3549953-1-wenst@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260916_085923_626790_56959E11 X-CRM114-Status: GOOD ( 15.05 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org A USB hub can have multiple ports, and this driver needs to differentiate which port is being matched to. The USB hub driver now associates the "port" node with the usb_port device, so here we can use the remote "port" node to check for a match. Then fall back to the remote device node for the other connection types. Also rewrite the existing "remote == dev_of_node(dev)" with device_match_of_node() for consistency. Reviewed-by: Manivannan Sadhasivam Signed-off-by: Chen-Yu Tsai --- Changes since v4: - Dropped blank line between __free() variable declaration and subsequent use of the variable in conditional Changes since v3: - Drop redundant device node validity check; device_match_of_node() does it internally Changes since v2: - Use device_match_of_node() --- drivers/power/sequencing/pwrseq-pcie-m2.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/power/sequencing/pwrseq-pcie-m2.c b/drivers/power/sequencing/pwrseq-pcie-m2.c index 322c307ce6c6..350a4c8831f7 100644 --- a/drivers/power/sequencing/pwrseq-pcie-m2.c +++ b/drivers/power/sequencing/pwrseq-pcie-m2.c @@ -175,9 +175,16 @@ static int pwrseq_pcie_m2_match(struct pwrseq_device *pwrseq, * parent matches the OF node of 'dev'. */ for_each_endpoint_of_node(ctx->of_node, endpoint) { + /* USB port devices are tied to the port nodes. */ + struct device_node *remote_port __free(device_node) = + of_graph_get_remote_port(endpoint); + if (device_match_of_node(dev, remote_port)) + return PWRSEQ_MATCH_OK; + + /* Try the remote port parent for other types. */ struct device_node *remote __free(device_node) = of_graph_get_remote_port_parent(endpoint); - if (remote && (remote == dev_of_node(dev))) + if (device_match_of_node(dev, remote)) return PWRSEQ_MATCH_OK; } -- 2.55.0.1032.g73a4cd73de-goog