The DFI unit can be used to measure DRAM utilization using perf. Add the
node to the device tree. The DFI needs a rockchip,pmu phandle to the pmu
containing registers for SDRAM configuration details. This is added in
this patch as well.

Reviewed-by: Sebastian Reichel <redacted>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---

Notes:
    Changes since v4:
     - new patch

 arch/arm64/boot/dts/rockchip/rk3588s.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
index 5544f66c6ff41..e693a341f6f27 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3588s.dtsi

@@ -443,6 +443,11 @@ usb_host1_ohci: usb@fc8c0000 {
                status = "disabled";
        };

+       pmu1grf: syscon@fd58a000 {
+               compatible = "rockchip,rk3588-pmugrf", "syscon", "simple-mfd";
+               reg = <0x0 0xfd58a000 0x0 0x10000>;
+       };
+
        sys_grf: syscon@fd58c000 {
                compatible = "rockchip,rk3588-sys-grf", "syscon";
                reg = <0x0 0xfd58c000 0x0 0x1000>;

@@ -1329,6 +1334,17 @@ pcie2x1l2_intc: legacy-interrupt-controller {
                };
        };

+       dfi: dfi@fe060000 {
+               reg = <0x00 0xfe060000 0x00 0x10000>;
+               compatible = "rockchip,rk3588-dfi";
+               interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH 0>,
+                            <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH 0>,
+                            <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH 0>,
+                            <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH 0>;
+               interrupt-names = "ch0", "ch1", "ch2", "ch3";