diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2023-04-27 14:10:03 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2023-05-17 08:56:22 +0200 |
| commit | 56f0440f27b48948122e5a739fc55c11b23bc821 (patch) | |
| tree | 3a7853cf37d8edd9b393a8450ac9a23e44a61c24 | |
| parent | bd0e450371efa69b985b801c5c67d6faac4d05a7 (diff) | |
ARM: dts: ux500: Add eSRAM nodes
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@linaro.org>
Link: https://lore.kernel.org/r/20230417-ux500-dma40-cleanup-v2-8-cdaa68a4b863@linaro.org
| -rw-r--r-- | arch/arm/boot/dts/ste-dbx5x0.dtsi | 73 |
1 files 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 @@ 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 @@ 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>; |