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Romain Naourkhilman
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ARM: dts: dra7: Add bus_dma_limit for l4 cfg bus
A bus_dma_limit was added for l3 bus by commit cfb5d65 ("ARM: dts: dra7: Add bus_dma_limit for L3 bus") to fix an issue observed only with SATA on DRA7-EVM with 4GB RAM and CONFIG_ARM_LPAE enabled. Since kernel 5.13, the SATA issue can be reproduced again following the SATA node move from L3 bus to L4_cfg in commit 8af1536 ("ARM: dts: Configure interconnect target module for dra7 sata"). Fix it by adding an empty dma-ranges property to l4_cfg and segment@100000 nodes (parent device tree node of SATA controller) to inherit the 2GB dma ranges limit from l3 bus node. Note: A similar fix was applied for PCIe controller by commit 90d4d3f ("ARM: dts: dra7: Fix bus_dma_limit for PCIe"). Fixes: 8af1536 ("ARM: dts: Configure interconnect target module for dra7 sata"). Link: https://lore.kernel.org/linux-omap/c583e1bb-f56b-4489-8012-ce742e85f233@smile.fr/ Cc: stable@vger.kernel.org # 5.13 Signed-off-by: Romain Naour <romain.naour@skf.com> Link: https://lore.kernel.org/r/20241115102537.1330300-1-romain.naour@smile.fr Signed-off-by: Kevin Hilman <khilman@baylibre.com>
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arch/arm/boot/dts/ti/omap/dra7-l4.dtsi

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ranges = <0x00000000 0x4a000000 0x100000>, /* segment 0 */
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<0x00100000 0x4a100000 0x100000>, /* segment 1 */
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<0x00200000 0x4a200000 0x100000>; /* segment 2 */
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dma-ranges;
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segment@0 { /* 0x4a000000 */
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compatible = "simple-pm-bus";
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<0x0007e000 0x0017e000 0x001000>, /* ap 124 */
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<0x00059000 0x00159000 0x001000>, /* ap 125 */
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<0x0005a000 0x0015a000 0x001000>; /* ap 126 */
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dma-ranges;
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target-module@2000 { /* 0x4a102000, ap 27 3c.0 */
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compatible = "ti,sysc";

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