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Fri, 12 Jun 2026 23:58:42 -0700 (PDT) From: MidG971 To: tomeu@tomeuvizoso.net, ogabbay@kernel.org, heiko@sntech.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, ulf.hansson@linaro.org Cc: dri-devel@lists.freedesktop.org, linux-rockchip@lists.infradead.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, xxm@rock-chips.com, chaoyi.chen@rock-chips.com, finley.xiao@rock-chips.com, diederik@cknow-tech.com, jonas@kwiboo.se, Midgy BALON Subject: [RFC PATCH v4 8/9] arm64: dts: rockchip: rk3568-rock-3b: Enable the NPU Date: Sat, 13 Jun 2026 09:01:15 +0200 Message-Id: <20260613070116.438906-9-midgy971@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260613070116.438906-1-midgy971@gmail.com> References: <20260613070116.438906-1-midgy971@gmail.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Midgy BALON Enable the NPU and its IOMMU on ROCK 3B and wire vdd_npu as the NPU power domain's domain-supply, so genpd brings the rail up and down with the domain (the domain is marked need_regulator). The PVTPLL compute clock is brought up later by the driver. The rail is no longer kept always-on, so pin it to 1000 mV (the NPU's 1 GHz operating voltage; the driver runs a fixed compute rate with no devfreq voltage scaling) and mark it boot-on, so it is up before the power domain de-idles the NPU NoC at power-on. Signed-off-by: Midgy BALON --- .../arm64/boot/dts/rockchip/rk3568-rock-3b.dts | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts index 69001e453732e..d3f9776c2bdc3 100644 --- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts +++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3b.dts @@ -330,9 +330,10 @@ regulator-state-mem { vdd_npu: DCDC_REG4 { regulator-name = "vdd_npu"; + regulator-boot-on; regulator-initial-mode = <0x2>; - regulator-min-microvolt = <500000>; - regulator-max-microvolt = <1350000>; + regulator-min-microvolt = <1000000>; + regulator-max-microvolt = <1000000>; regulator-ramp-delay = <6001>; regulator-state-mem { @@ -787,3 +788,16 @@ vp0_out_hdmi: endpoint@ROCKCHIP_VOP2_EP_HDMI0 { remote-endpoint = <&hdmi_in_vp0>; }; }; + +&pd_npu { + domain-supply = <&vdd_npu>; +}; + +&rknn_core_0 { + npu-supply = <&vdd_npu>; + status = "okay"; +}; + +&rknn_mmu_0 { + status = "okay"; +}; -- 2.39.5