dts: sun8i-h3: Add APB0 related clocks and resets

APB0 is bearly mentioned in H3 User Manual and it is only setup in the
Allwinners kernel dump for CIR. I have verified experimentally that the
gate for R_PIO exists and works, though. There are probably other gates
there but I don't know their order right now and I don't have access to
their peripherals on my board to test them.

After some experiments and reviewing how this is organized on other
sunxi SoCs, I couldn't actually find any way to disable clocks for R_PIO
and they are working properly without doing anything so I assume they
are connected straight to the 24Mhz oscillator for now.

Signed-off-by: Krzysztof Adamski <k@japko.eu>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi b/arch/arm/boot/dts/sun8i-h3.dtsi
index 3ba65c2..1348b69 100644 (file)
--- a/arch/arm/boot/dts/sun8i-h3.dtsi
+++ b/arch/arm/boot/dts/sun8i-h3.dtsi
@@ -276,6 +276,25 @@
                        clocks = <&osc24M>, <&pll6 1>, <&pll5>;
                        clock-output-names = "mbus";
                };
+
+               apb0: apb0_clk {
+                       compatible = "fixed-factor-clock";
+                       #clock-cells = <0>;
+                       clock-div = <1>;
+                       clock-mult = <1>;
+                       clocks = <&osc24M>;
+                       clock-output-names = "apb0";
+               };
+
+               apb0_gates: clk@01f01428 {
+                       compatible = "allwinner,sun8i-h3-apb0-gates-clk",
+                                    "allwinner,sun4i-a10-gates-clk";
+                       reg = <0x01f01428 0x4>;
+                       #clock-cells = <1>;
+                       clocks = <&apb0>;
+                       clock-indices = <0>, <1>;
+                       clock-output-names = "apb0_pio", "apb0_ir";
+               };
        };
 
        soc {
@@ -493,5 +512,11 @@
                        interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>,
                                     <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;
                };
+
+               apb0_reset: reset@01f014b0 {
+                       reg = <0x01f014b0 0x4>;
+                       compatible = "allwinner,sun6i-a31-clock-reset";
+                       #reset-cells = <1>;
+               };
        };
 };