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Thu, 6 Aug 2026 02:35:56 -0400 (EDT) From: Jiaxing Hu To: tomeu@tomeuvizoso.net, heiko@sntech.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, ulfh@kernel.org, p.zabel@pengutronix.de, ogabbay@kernel.org, zhangqing@rock-chips.com Cc: royalnet026@gmail.com, alchark@flipper.net, chaoyi.chen@rock-chips.com, diederik@cknow-tech.com, dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, iommu@lists.linux.dev, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Jiaxing Hu Subject: [RFC PATCH v6 9/9] arm64: dts: rockchip: rk3576-rock-4d: enable NPU Date: Thu, 6 Aug 2026 18:34:13 +1200 Message-ID: <20260806063413.350184-10-gahing@gahingwoo.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260806063413.350184-1-gahing@gahingwoo.com> References: <20260806063413.350184-1-gahing@gahingwoo.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260805_233605_858691_B68EA0BC X-CRM114-Status: UNSURE ( 9.94 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Enable rknn_core_0 and its IOMMU on the Radxa ROCK 4D and supply the core from vdd_npu_s0. The supply is marked always-on because the NPU power domains are what gate the block here, and dropping the rail underneath them takes an async SError on the next power-on rather than a clean retry. Only rknn_core_0 is enabled: the driver binds one core per node and the second core is left to whoever can test it. Signed-off-by: Jiaxing Hu --- arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts index 272af1012..965e0906b 100644 --- a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts +++ b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts @@ -442,6 +442,7 @@ regulator-state-mem { }; vdd_npu_s0: dcdc-reg2 { + regulator-always-on; regulator-boot-on; regulator-enable-ramp-delay = <400>; regulator-min-microvolt = <550000>; @@ -869,3 +870,12 @@ vp0_out_hdmi: endpoint@ROCKCHIP_VOP2_EP_HDMI0 { remote-endpoint = <&hdmi_in_vp0>; }; }; + +&rknn_core_0 { + npu-supply = <&vdd_npu_s0>; + status = "okay"; +}; + +&rknn_mmu_0 { + status = "okay"; +}; -- 2.43.0