ARM: mstar: Add IMI SRAM region

All MStar v7 SoCs have an internal SRAM region that is between 64KB
(infinity2m) and 128KB(infinity3, mercury5).

The region is always at the same base address and is used for the
second stage loader (MStar IPL or u-boot SPL) and will be used for
the DDR self-refresh entry code within the kernel eventually.

This patch adds a 128KB region to the SoC and the minimum 64KB SRAM
region to the base dtsi. Families with more SRAM will override the
size in their family level dtsi.

Signed-off-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

diff --git a/arch/arm/boot/dts/mstar-v7.dtsi b/arch/arm/boot/dts/mstar-v7.dtsi
index 3b99bb435bb5f95d03da78eaaf9ba35e73b7da9d..1941f88a69a5d9d74050a881607b231b0e442d09 100644 (file)
--- a/arch/arm/boot/dts/mstar-v7.dtsi
+++ b/arch/arm/boot/dts/mstar-v7.dtsi
@@ -45,7 +45,8 @@
                #address-cells = <1>;
                #size-cells = <1>;
                ranges = <0x16001000 0x16001000 0x00007000>,
-                        <0x1f000000 0x1f000000 0x00400000>;
+                        <0x1f000000 0x1f000000 0x00400000>,
+                        <0xa0000000 0xa0000000 0x20000>;
 
                gic: interrupt-controller@16001000 {
                        compatible = "arm,cortex-a7-gic";
@@ -79,5 +80,10 @@
                                status = "disabled";
                        };
                };
+
+               imi: sram@a0000000 {
+                       compatible = "mmio-sram";
+                       reg = <0xa0000000 0x10000>;
+               };
        };
 };