diff options
| author | Manikanta Maddireddy <mmaddireddy@nvidia.com> | 2026-03-25 00:39:59 +0530 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2026-04-28 10:32:07 +0200 |
| commit | d60ed99f1c9e0bdf1fcd713426f6213abe592c83 (patch) | |
| tree | 8dcd1f50f0b3a20ae88b8ece926c1fe00c35d59f | |
| parent | 8f0cc929a4bad534c5a860a53d88912cf16d9c9c (diff) | |
| download | linux-next-history-d60ed99f1c9e.tar.gz | |
arm64: tegra: Add aspm-l1-entry-delay-ns to PCIe nodes
Add the aspm-l1-entry-delay-ns device tree property to all PCIe Root Port
and PCIe Endpoint nodes in tegra194.dtsi and tegra234.dtsi so that ASPM L1
entrance latency is configured from device tree.
- Tegra194: 4000 ns (4 us) for both Root Port and Endpoint.
- Tegra234: 8000 ns (8 us) for Root Port, 16000 ns (16 us) for Endpoint.
Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
| -rw-r--r-- | arch/arm64/boot/dts/nvidia/tegra194.dtsi | 9 | ||||
| -rw-r--r-- | arch/arm64/boot/dts/nvidia/tegra234.dtsi | 16 |
2 files changed, 25 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi index 849694f751d90..1d659454a6f9f 100644 --- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi @@ -2382,6 +2382,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <4000>; bus-range = <0x0 0xff>; @@ -2434,6 +2435,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <4000>; bus-range = <0x0 0xff>; @@ -2486,6 +2488,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <4000>; bus-range = <0x0 0xff>; @@ -2538,6 +2541,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <4000>; bus-range = <0x0 0xff>; @@ -2583,6 +2587,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <4000>; interconnects = <&mc TEGRA194_MEMORY_CLIENT_PCIE4R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE4W &emc>; @@ -2629,6 +2634,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <4000>; bus-range = <0x0 0xff>; @@ -2674,6 +2680,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <4000>; interconnects = <&mc TEGRA194_MEMORY_CLIENT_PCIE0R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE0W &emc>; @@ -2723,6 +2730,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <4000>; bus-range = <0x0 0xff>; @@ -2771,6 +2779,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <4000>; interconnects = <&mc TEGRA194_MEMORY_CLIENT_PCIE5R &emc>, <&mc TEGRA194_MEMORY_CLIENT_PCIE5W &emc>; diff --git a/arch/arm64/boot/dts/nvidia/tegra234.dtsi b/arch/arm64/boot/dts/nvidia/tegra234.dtsi index 18220cdac9f9b..75bb9a0ad0279 100644 --- a/arch/arm64/boot/dts/nvidia/tegra234.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra234.dtsi @@ -4532,6 +4532,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -4586,6 +4587,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -4640,6 +4642,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -4686,6 +4689,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <16000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE10AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE10AW &emc>; @@ -4734,6 +4738,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -4788,6 +4793,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -4842,6 +4848,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -4896,6 +4903,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -4937,6 +4945,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <16000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE4R &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE4W &emc>; @@ -4983,6 +4992,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -5037,6 +5047,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -5083,6 +5094,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <16000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE5R &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE5W &emc>; @@ -5131,6 +5143,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -5177,6 +5190,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <16000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE6AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE6AW &emc>; @@ -5225,6 +5239,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <8000>; bus-range = <0x0 0xff>; @@ -5271,6 +5286,7 @@ nvidia,aspm-cmrt-us = <60>; nvidia,aspm-pwr-on-t-us = <20>; nvidia,aspm-l0s-entrance-latency-us = <3>; + aspm-l1-entry-delay-ns = <16000>; interconnects = <&mc TEGRA234_MEMORY_CLIENT_PCIE7AR &emc>, <&mc TEGRA234_MEMORY_CLIENT_PCIE7AW &emc>; |