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Sun, 20 Sep 2026 14:13:59 -0700 (PDT) Received: from ryzen.lan ([2601:644:8000:7a86::e35]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39e6c3145dasm10609743a91.4.2026.09.20.14.13.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 20 Sep 2026 14:13:59 -0700 (PDT) From: Rosen Penev To: devicetree@vger.kernel.org Cc: Florian Fainelli , Hauke Mehrtens , =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= , Broadcom internal kernel review list , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Greg Kroah-Hartman , Liam Girdwood , Mark Brown , linux-arm-kernel@lists.infradead.org (moderated list:BROADCOM BCM5301X ARM ARCHITECTURE), linux-kernel@vger.kernel.org (open list), linux-usb@vger.kernel.org (open list:USB SUBSYSTEM) Subject: [PATCH 0/2] usb: bcma: control VBUS via a regulator Date: Sun, 20 Sep 2026 14:13:54 -0700 Message-ID: <20260920211356.186967-1-rosenp@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit bcma-hcd currently drives the USB power line by grabbing the undocumented "vcc-gpio" property from the controller node and poking it through gpiolib. Besides relying on a non-standard binding, this cannot work on boards such as the NETGEAR R7000 and R8000 where one chipcommon GPIO powers both the USB2 and USB3 cores: the two controllers each request that GPIO exclusively, so the second one fails with -EBUSY and its port stays dead. Instead, switch the driver to the standard regulator interface and express the power rails as regulator-fixed nodes bound to the chipcommon GPIOs. The regulator core reference-counts enable/disable requests, letting both controllers share one GPIO without conflicts. Rosen Penev (2): usb: bcma: control VBUS via a regulator instead of a GPIO ARM: dts: broadcom: model USB VBUS power with regulator-fixed .../broadcom/bcm4708-buffalo-wxr-1750dhp.dts | 14 +++++- .../bcm4708-buffalo-wzr-1166dhp-common.dtsi | 25 ++++++++++- .../broadcom/bcm4708-buffalo-wzr-1750dhp.dts | 25 ++++++++++- .../broadcom/bcm4708-linksys-ea6300-v1.dts | 14 +++++- .../broadcom/bcm4708-linksys-ea6500-v2.dts | 14 +++++- .../dts/broadcom/bcm4708-netgear-r6250.dts | 14 +++++- .../dts/broadcom/bcm4708-netgear-r6300-v2.dts | 14 +++++- .../dts/broadcom/bcm47081-luxul-xwr-1200.dts | 14 +++++- .../broadcom/bcm47081-tplink-archer-c5-v2.dts | 14 +++++- .../dts/broadcom/bcm4709-asus-rt-ac3200.dts | 14 +++++- .../broadcom/bcm4709-buffalo-wxr-1900dhp.dts | 14 +++++- .../dts/broadcom/bcm4709-linksys-ea9200.dts | 26 ++++++++++- .../dts/broadcom/bcm4709-netgear-r7000.dts | 16 ++++++- .../dts/broadcom/bcm4709-netgear-r8000.dts | 16 ++++++- .../broadcom/bcm4709-tplink-archer-c9-v1.dts | 26 ++++++++++- .../dts/broadcom/bcm47094-asus-rt-ac3100.dtsi | 14 +++++- .../dts/broadcom/bcm47094-asus-rt-ac5300.dts | 14 +++++- .../dts/broadcom/bcm47094-dlink-dir-885l.dts | 14 +++++- .../dts/broadcom/bcm47094-dlink-dir-890l.dts | 26 ++++++++++- .../broadcom/bcm47094-linksys-panamera.dts | 26 ++++++++++- .../dts/broadcom/bcm47094-luxul-abr-4500.dts | 14 +++++- .../dts/broadcom/bcm47094-luxul-xbr-4500.dts | 14 +++++- .../dts/broadcom/bcm47094-luxul-xwr-3100.dts | 14 +++++- .../broadcom/bcm47094-luxul-xwr-3150-v1.dts | 14 +++++- .../arm/boot/dts/broadcom/bcm947189acdbmr.dts | 14 +++++- drivers/usb/host/bcma-hcd.c | 45 +++++++++++++------ 26 files changed, 422 insertions(+), 47 deletions(-) -- 2.55.0