powerpc/microwatt: Add litesd

This is the register layout of the litesd peripheral for the fusesoc
based Microwatt SoC.

It requires a description of the system clock, which is hardcoded to
100MHz.

Signed-off-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220930065012.2860577-1-joel@jms.id.au

diff --git a/arch/powerpc/boot/dts/microwatt.dts b/arch/powerpc/boot/dts/microwatt.dts
index b69db1d..269e930 100644 (file)
--- a/arch/powerpc/boot/dts/microwatt.dts
+++ b/arch/powerpc/boot/dts/microwatt.dts
@@ -21,6 +21,14 @@
                reg = <0x00000000 0x00000000 0x00000000 0x10000000>;
        };
 
+       clocks {
+               sys_clk: litex_sys_clk {
+                       #clock-cells = <0>;
+                       compatible = "fixed-clock";
+                       clock-frequency = <100000000>;
+               };
+       };
+
        cpus {
                #size-cells = <0x00>;
                #address-cells = <0x01>;
@@ -141,6 +149,20 @@
                        litex,slot-size = <0x800>;
                        interrupts = <0x11 0x1>;
                };
+
+               mmc@8040000 {
+                       compatible = "litex,mmc";
+                       reg = <0x8042800 0x800
+                               0x8041000 0x800
+                               0x8040800 0x800
+                               0x8042000 0x800
+                               0x8041800 0x800>;
+                       reg-names = "phy", "core", "reader", "writer", "irq";
+                       bus-width = <4>;
+                       interrupts = <0x13 1>;
+                       cap-sd-highspeed;
+                       clocks = <&sys_clk>;
+               };
        };
 
        chosen {