[PATCH v2 3/9] ARM: mstar: Add IMI SRAM region

[Daniel Palmer]

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 at 0x0f.com>
---
 arch/arm/boot/dts/mstar-v7.dtsi | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/mstar-v7.dtsi b/arch/arm/boot/dts/mstar-v7.dtsi
index 3b99bb435bb5..1941f88a69a5 100644
--- a/arch/arm/boot/dts/mstar-v7.dtsi
+++ b/arch/arm/boot/dts/mstar-v7.dtsi
@@ -45,7 +45,8 @@ soc: soc {
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0x16001000 0x16001000 0x00007000>,
-			 <0x1f000000 0x1f000000 0x00400000>;
+			 <0x1f000000 0x1f000000 0x00400000>,
+			 <0xa0000000 0xa0000000 0x20000>;
 
 		gic: interrupt-controller at 16001000 {
 			compatible = "arm,cortex-a7-gic";
@@ -79,5 +80,10 @@ pm_uart: uart at 221000 {
 				status = "disabled";
 			};
 		};
+
+		imi: sram at a0000000 {
+			compatible = "mmio-sram";
+			reg = <0xa0000000 0x10000>;
+		};
 	};
 };
-- 
2.27.0