The U8500 has 640 KB of eSRAM, split into 5 banks of 128 KB
each. Add this to the device tree, with ESRAM 0, 1+2 and 3+4
as separate devices, since these have different power domains.
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
arch/arm/boot/dts/ste-dbx5x0.dtsi | 73 +++++++++++++++++++++++++++++++++++++--
1 file changed, 71 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boot/dts/ste-dbx5x0.dtsi b/arch/arm/boot/dts/ste-dbx5x0.dtsi
index fead7afd5517..c34ccde04600 100644
--- a/arch/arm/boot/dts/ste-dbx5x0.dtsi
+++ b/arch/arm/boot/dts/ste-dbx5x0.dtsi
@@ -110,6 +110,74 @@ soc {
interrupt-parent = <&intc>;
ranges;
+ /*
+ * 640KB ESRAM (embedded static random access memory), divided
+ * into 5 banks of 128 KB each. This is a fast memory usually
+ * used by different accelerators. We group these according to
+ * their power domains: ESRAM0 (always on) ESRAM 1+2 and
+ * ESRAM 3+4.
+ */
+ sram@40000000 {
+ /* The first (always on) ESRAM 0, 128 KB */
+ compatible = "mmio-sram";
+ reg = <0x40000000 0x20000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 0x40000000 0x20000>;
+
+ sram@0 {
+ compatible = "stericsson,u8500-esram";
+ reg = <0x0 0x10000>;
+ pool;
+ };
+ lcpa: sram@10000 {
+ /*
+ * This eSRAM is used by the DMA40 DMA controller
+ * for Logical Channel Paramers (LCP), the address
+ * where these parameters are stored is called "LCPA".
+ * This is addressed directly by the driver so no
+ * pool is used.
+ */
+ compatible = "stericsson,u8500-esram";
+ label = "DMA40-LCPA";
+ reg = <0x10000 0x800>;
+ };
+ sram@10800 {
+ compatible = "stericsson,u8500-esram";
+ reg = <0x10800 0xf800>;
+ pool;
+ };
+ };
+ sram@40020000 {
+ /* ESRAM 1+2, 256 KB */
+ compatible = "mmio-sram";
+ reg = <0x40020000 0x40000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 0x40020000 0x40000>;
+ };
+ sram@40060000 {
+ /* ESRAM 3+4, 256 KB */
+ compatible = "mmio-sram";
+ reg = <0x40060000 0x40000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0 0x40060000 0x40000>;
+
+ lcla: sram@20000 {
+ /*
+ * This eSRAM is used by the DMA40 DMA controller
+ * for Logical Channel Logical Addresses (LCLA), the address
+ * where these parameters are stored is called "LCLA".
+ * This is addressed directly by the driver so no
+ * pool is used.
+ */
+ compatible = "stericsson,u8500-esram";
+ label = "DMA40-LCLA";
+ reg = <0x20000 0x2000>;
+ };
+ };
+
ptm@801ae000 {
compatible = "arm,coresight-etm3x", "arm,primecell";
reg = <0x801ae000 0x1000>;
@@ -536,9 +604,10 @@ usb_per5@a03e0000 {
dma: dma-controller@801C0000 {
compatible = "stericsson,db8500-dma40", "stericsson,dma40";
- reg = <0x801C0000 0x1000 0x40010000 0x800>;
- reg-names = "base", "lcpa";
+ reg = <0x801C0000 0x1000>;
+ reg-names = "base";
interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+ sram = <&lcpa>, <&lcla>;
#dma-cells = <3>;
memcpy-channels = <56 57 58 59 60>;
--
2.40.0
