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[86.58.6.171]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45e0157619fsm36045945e9.7.2025.09.11.11.46.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Sep 2025 11:46:43 -0700 (PDT) From: Jernej =?UTF-8?B?xaBrcmFiZWM=?= To: Stephen Boyd , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Chen-Yu Tsai Cc: Andre Przywara , linux-sunxi@lists.linux.dev, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 7/7] arm64: dts: allwinner: a523: Add NPU device node Date: Thu, 11 Sep 2025 20:46:42 +0200 Message-ID: <1930957.tdWV9SEqCh@jernej-laptop> In-Reply-To: <20250911174710.3149589-8-wens@kernel.org> References: <20250911174710.3149589-1-wens@kernel.org> <20250911174710.3149589-8-wens@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250911_114645_643386_D112C23E X-CRM114-Status: GOOD ( 17.14 ) 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 Dne =C4=8Detrtek, 11. september 2025 ob 19:47:10 Srednjeevropski poletni = =C4=8Das je Chen-Yu Tsai napisal(a): > From: Chen-Yu Tsai >=20 > The Allwinner T527 SoC has an NPU built in. Based on identifiers found > in the BSP, it is a Vivante IP block. After enabling it, the etnaviv > driver reports it as a GC9000 revision 9003. >=20 > The standard bindings are used as everything matches directly. There is > no option for DVFS at the moment. That might require some more work, > perhaps on the efuse side to map speed bins. >=20 > It is unclear whether the NPU block is fused out at the hardware level > or the BSP limits use of the NPU through software, as the author only > has boards with the T527. >=20 > Reviewed-by: Andre Przywara > Signed-off-by: Chen-Yu Tsai Reviewed-by: Jernej Skrabec Best regards, Jernej > --- > arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi | 12 ++++++++++++ > 1 file changed, 12 insertions(+) >=20 > diff --git a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi b/arch/arm64/= boot/dts/allwinner/sun55i-a523.dtsi > index f93376372aba..9676caf9bd4e 100644 > --- a/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi > +++ b/arch/arm64/boot/dts/allwinner/sun55i-a523.dtsi > @@ -852,6 +852,18 @@ mcu_ccu: clock-controller@7102000 { > #clock-cells =3D <1>; > #reset-cells =3D <1>; > }; > + > + npu: npu@7122000 { > + compatible =3D "vivante,gc"; > + reg =3D <0x07122000 0x1000>; > + interrupts =3D ; > + clocks =3D <&mcu_ccu CLK_BUS_MCU_NPU_ACLK>, > + <&ccu CLK_NPU>, > + <&mcu_ccu CLK_BUS_MCU_NPU_HCLK>; > + clock-names =3D "bus", "core", "reg"; > + resets =3D <&mcu_ccu RST_BUS_MCU_NPU>; > + power-domains =3D <&ppu PD_NPU>; > + }; > }; > =20 > thermal-zones { >=20