Difference between revisions of "Tegra/Mainline SW/Linux kernel"
< Tegra | Mainline SW
| Line 24: | Line 24: | ||
* SPI. | * SPI. | ||
* SD/eMMC. | * SD/eMMC. | ||
| − | * | + | * USB2 Host. |
* Display controller (not all I/O interfaces on all SoCs; see below): | * Display controller (not all I/O interfaces on all SoCs; see below): | ||
** RGB/LVDS for Tegra20/30 (for LCD panel support). | ** RGB/LVDS for Tegra20/30 (for LCD panel support). | ||
| Line 37: | Line 37: | ||
* Advanced (high-speed) transfer modes for SD and eMMC. IO voltage scaling. | * Advanced (high-speed) transfer modes for SD and eMMC. IO voltage scaling. | ||
* PCIe on Tegra124. | * PCIe on Tegra124. | ||
| − | * | + | * USB3 controller. |
| + | * SATA. | ||
| + | * USB2 device mode and OTG. | ||
* SKU awareness (SKU-specific clock and thermal limits). | * SKU awareness (SKU-specific clock and thermal limits). | ||
* POR (Plan Of Record) clocks. | * POR (Plan Of Record) clocks. | ||
| Line 44: | Line 46: | ||
* DVFS (Dynamic Voltage and Frequency Scaling). | * DVFS (Dynamic Voltage and Frequency Scaling). | ||
* Thermal management. | * Thermal management. | ||
| − | * | + | * USB2 bus power saving. |
* I2C slave support. The Toshiba AC100 NVEC driver could be generalized to provide this. | * I2C slave support. The Toshiba AC100 NVEC driver could be generalized to provide this. | ||
* SPI slave support? | * SPI slave support? | ||
Revision as of 17:08, 14 May 2014
NVIDIA Tegra SoCs are well supported by mainline kernels.
Kernel releases may be obtained from:
- https://www.kernel.org/ releases, via download.
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/ releases, via git.
- https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/ absolute latest development code, via git.
The following mainline kernel releases introduced support for Tegra SoCs:
- Tegra20 has been upstream for many years.
- Tegra30 support was added in v3.3.
- Tegra114 support was added in v3.9.
- Tegra124 support was added in v3.13.
The first kernel release to support a given SoC has historically contained extremely minimal support. One or two kernel releases later will typically be the first useful version.
Features that already work are:
- It boots!
- Serial console.
- CPU hotplug.
- CPU frequency scaling (basic, for Tegra20 only).
- I2C master.
- Regulators, PMICs, RTCs.
- SPI.
- SD/eMMC.
- USB2 Host.
- Display controller (not all I/O interfaces on all SoCs; see below):
- RGB/LVDS for Tegra20/30 (for LCD panel support).
- DSI for Tegra114 (for LCD panel support).
- eDP for Tegra124 (for LCD panel support).
- HDMI for Tegra20/30/114/124.
- PCIe (Tegra20/30).
A probably-incomplete list of features that are not yet implemented is:
- Kepler GPU support via Nouvea (work in progress).
- Advanced (high-speed) transfer modes for SD and eMMC. IO voltage scaling.
- PCIe on Tegra124.
- USB3 controller.
- SATA.
- USB2 device mode and OTG.
- SKU awareness (SKU-specific clock and thermal limits).
- POR (Plan Of Record) clocks.
- cpufreq for SoCs other than Tegra20.
- EMC (memory controller) frequency scaling.
- DVFS (Dynamic Voltage and Frequency Scaling).
- Thermal management.
- USB2 bus power saving.
- I2C slave support. The Toshiba AC100 NVEC driver could be generalized to provide this.
- SPI slave support?
