Difference between revisions of "CI20 upstream"
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| − | | | + | | Quirks: see patches [https://github.com/ZubairLK/CI20_linux/commit/1d1d702613e0f4241ab7d8021b937e6366117c79] [https://github.com/MIPS/CI20_linux/commit/3939d3a65122eb40beec6aed1484c04ffc20cc27] need moving to wrapper driver, like 8250_dw and [https://lkml.org/lkml/2014/8/12/266 mediatek] which can be common between Ingenic SoCs. |
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| USB (EHCI) | | USB (EHCI) | ||
Revision as of 08:22, 16 December 2014
This page contains details about the latest kernel branch and any known quirks/special requirements.
It will be periodically updated to keep up to speed with the latest.
The current branch tracking mainline 3.16
https://github.com/MIPS/CI20_linux
Status of Linux Kernel Drivers
Core
| Name | State | Path | Notes |
|---|---|---|---|
| IRQ Controller | drivers/irqchip/irq-jz4780.c | Very similar between SoCs (4740 has one bank, 60,70,80 has two banks) | |
| Clocks | Works | drivers/clk/jz47xx | Could have common drivers/clk/ingenic for all SoCs with SoC specific binding using common components(?) |
| CPUfreq | |||
| Device Tree | Mostly | Parsed on boot, but compiled into the kernel. Would be good to allow it to be passed from the bootloader. | |
| DMA | Mostly | drivers/dma/dma-jz4780.c | needs combining into dma-jz4740. Works, just missing priority support |
| GPIO | Works | drivers/pinctrl/pinctrl-jz4780.c | should perhaps be in drivers/gpio/ (?) |
| Hotplug | |||
| MXU Context | |||
| PinCtrl | Mostly | drivers/pinctrl/pinctrl-jz4780.c | Differs between SoCs. Functional, may need DT binding changes based on feedback from upstream. See also pinctrl-jz4770.c. |
| Power Controller (LPCR Register) | |||
| Power Off & Reset | Works | ||
| RTC | Works | ||
| SMP | Works | ||
| Watchdog | Works |
Peripheral drivers
| Name | State | Path | Notes |
|---|---|---|---|
| ADC | WIP | Check branches on https://github.com/ZubairLK/CI20_linux | |
| Audio (ALSA) | WIP | Check patches on https://groups.google.com/forum/#!forum/mips-creator-ci20-dev | |
| Camera | |||
| Ethernet | Works | ||
| GPU | |||
| HDMI | WIP | Check patches on https://groups.google.com/forum/#!forum/mips-creator-ci20-dev | |
| I2C | Works | ||
| IPU | |||
| IR | drivers/media/rc/gpio-ir-recv.c | GPIO, so use upstream GPIO driver | |
| MMC | Works | ||
| NAND | Works | ||
| Regulator | Works | ||
| SPI | SPIO GPIO should work.. | ||
| UART | Works | Quirks: see patches [1] [2] need moving to wrapper driver, like 8250_dw and mediatek which can be common between Ingenic SoCs. | |
| USB (EHCI) | Works | ||
| USB (OHCI) | Works | ||
| USB(OTG) | Works | Upstream driver supports only host mode as of 3.15 | |
| VPU | |||
| Wifi | WIP | Check patches on https://groups.google.com/forum/#!forum/mips-creator-ci20-dev | |
| BT | WIP | Check branches on https://github.com/ZubairLK/CI20_linux |
List of other possible issues
- /etc/init.d/iw8103 is the startup script for the BT/Wifi firmware in the default rootfs.
If using 3.16, the script can cause the boot to hang. Please move the script out of /etc/init.d
Add "root=/dev/mmcblk0p1 rootwait" to bootargs in uboot if you wish to boot a rootfs from mmc.
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