arm64: dts: imx8mp: Add NPU Node

The NPU is based on the Vivante GC8000 and its power-domain
is controlled my pgc_mlmix.  Since the power-domain uses
some of these clocks, setup the clock parent and rates
inside the power-domain, and add the NPU node.

The data sheet states the CLK_ML_AHB should be 300MHz for
nominal, but 800MHz clock will divide down to 266 instead.
Boards which operate in over-drive mode should update the
clocks on their boards accordingly.  When the driver loads,
the NPU numerates as:

 etnaviv-gpu 38500000.npu: model: GC8000, revision: 8002

Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index 3ad97b7..28f2c6d 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -889,6 +889,15 @@
                                                clocks = <&clk IMX8MP_CLK_ML_AXI>,
                                                         <&clk IMX8MP_CLK_ML_AHB>,
                                                         <&clk IMX8MP_CLK_NPU_ROOT>;
+                                               assigned-clocks = <&clk IMX8MP_CLK_ML_CORE>,
+                                                                 <&clk IMX8MP_CLK_ML_AXI>,
+                                                                 <&clk IMX8MP_CLK_ML_AHB>;
+                                               assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_800M>,
+                                                                        <&clk IMX8MP_SYS_PLL1_800M>,
+                                                                        <&clk IMX8MP_SYS_PLL1_800M>;
+                                               assigned-clock-rates = <800000000>,
+                                                                      <800000000>,
+                                                                      <300000000>;
                                        };
                                };
                        };
@@ -2014,6 +2023,18 @@
                        interconnect-names = "g1", "g2", "vc8000e";
                };
 
+               npu: npu@38500000 {
+                       compatible = "vivante,gc";
+                       reg = <0x38500000 0x200000>;
+                       interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>;
+                       clocks = <&clk IMX8MP_CLK_NPU_ROOT>,
+                                <&clk IMX8MP_CLK_NPU_ROOT>,
+                                <&clk IMX8MP_CLK_ML_AXI>,
+                                <&clk IMX8MP_CLK_ML_AHB>;
+                       clock-names = "core", "shader", "bus", "reg";
+                       power-domains = <&pgc_mlmix>;
+               };
+
                gic: interrupt-controller@38800000 {
                        compatible = "arm,gic-v3";
                        reg = <0x38800000 0x10000>,