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/Linux-v6.1/Documentation/devicetree/bindings/timestamp/
Dnvidia,tegra194-hte.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/timestamp/nvidia,tegra194-hte.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Tegra194 on chip generic hardware timestamping engine (HTE)
10 - Dipen Patel <dipenp@nvidia.com>
13 Tegra SoC has two instances of generic hardware timestamping engines (GTE)
14 known as GTE GPIO and GTE IRQ, which can monitor subset of GPIO and on chip
18 to enable or disable for the hardware timestamping. The GTE GPIO monitors
19 GPIO lines from the AON (always on) GPIO controller.
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/Linux-v6.1/Documentation/driver-api/hte/
Dtegra194-hte.rst1 .. SPDX-License-Identifier: GPL-2.0+
7 -----------
8 The Nvidia tegra194 HTE provider driver implements two GTE
9 (Generic Timestamping Engine) instances: 1) GPIO GTE and 2) LIC
10 (Legacy Interrupt Controller) IRQ GTE. Both GTE instances get the
15 GPIO GTE
16 --------
18 This GTE instance timestamps GPIO in real time. For that to happen GPIO
19 needs to be configured as input. The always on (AON) GPIO controller instance
20 supports timestamping GPIOs in real time and it has 39 GPIO lines. The GPIO GTE
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/Linux-v6.1/drivers/hte/
DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
18 tristate "NVIDIA Tegra194 HTE Support"
22 known as generic timestamping engine (GTE) support on NVIDIA Tegra194
23 systems-on-chip. The driver supports 352 LIC IRQs and 39 AON GPIOs
27 tristate "NVIDIA Tegra194 HTE Test"
30 The NVIDIA Tegra194 GTE test driver demonstrates how to use HTE
Dhte-tegra194.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2021-2022 NVIDIA Corporation
29 #define NV_AON_SLICE_INVALID -1
32 /* AON HTE line map For slice 1 */
36 /* AON HTE line map For slice 2 */
77 #define HTE_SLICE_SIZE (HTE_SLICE1_TETEN - HTE_SLICE0_TETEN)
239 return readl(hte->regs + reg); in tegra_hte_readl()
245 writel(val, hte->regs + reg); in tegra_hte_writel()
255 return -EINVAL; in tegra_hte_map_to_line_id()
257 return -EINVAL; in tegra_hte_map_to_line_id()
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/Linux-v6.1/drivers/soc/tegra/cbb/
Dtegra194-cbb.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2021-2022, NVIDIA CORPORATION. All rights reserved
28 #include <soc/tegra/tegra-cbb.h>
118 bool format; // [31] = 1 -> FlexNoC versions 2.7 & above
190 "RD - Read, Incrementing",
191 "RDW - Read, Wrap", /* Not Supported */
192 "RDX - Exclusive Read", /* Not Supported */
193 "RDL - Linked Read", /* Not Supported */
194 "WR - Write, Incrementing",
195 "WRW - Write, Wrap", /* Not Supported */
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