ARM: dts: am4372: Reserve pm code and data regions in ocmcram sram node

Add a 'pm_sram_code' reserved region to the ocmcram node to be exposed
by the mmio-sram driver as a pool but also mark it protect-exec so that
it can run code copied to it using sram_exec_copy.

Add another 'pm_sram_data' reserved region to the ocmcram node to act as
the data space for any code running from the 'pm_sram_code' region that
is exposed as a regular pool.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index 964f3ef..81a03c1 100644 (file)
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -1141,6 +1141,21 @@
                ocmcram: ocmcram@40300000 {
                        compatible = "mmio-sram";
                        reg = <0x40300000 0x40000>; /* 256k */
+                       ranges = <0x0 0x40300000 0x40000>;
+                       #address-cells = <1>;
+                       #size-cells = <1>;
+
+                       pm_sram_code: pm-sram-code@0 {
+                               compatible = "ti,sram";
+                               reg = <0x0 0x1000>;
+                               protect-exec;
+                       };
+
+                       pm_sram_data: pm-sram-data@1000 {
+                               compatible = "ti,sram";
+                               reg = <0x1000 0x1000>;
+                               pool;
+                       };
                };
 
                dcan0: can@481cc000 {