kernel/linux.git/arch/arm/boot/dts/sun4i-a10-pcduino.dts, branch linux-4.4.y

ARM: dts: sun4i: Enable USB DRC on pcDuino1/2

2015-10-11T17:06:22+00:00

Enable the otg/drc usb controller on the pcDuino1/2 board. Note that the pcDuino1 FEX file from the vendor contains the following information in the [usbc0] section: usb_id_gpio = port:PH04<0><1> usb_det_vbus_gpio = port:PH05<0><0> usb_drv_vbus_gpio = port:PB09<1><0><0> While the pcDuino2 FEX has: usb_id_gpio = port:PH04<0><1> usb_det_vbus_gpio = port:PH05<0><0> usb_drv_vbus_gpio = port:PD02<1><0><0> The ID pin is indeed PH4. The PD2 pin can be used to switch power on/off for the USB Type A receptacle on pcDuino2, but it has nothing to do with the MicroUSB OTG receptacle. The VBUS pin of the MicroUSB receptacle is always connected to 5V according to the schematics (both pcDuino1 and pcDuino2) and confirmed by doing some tests on pcDuino2. The PH5 pin is just one of the pins on the J8 expansion header and has nothing to do with USB OTG. The PB9 pin is pulled up and connected to the N_VBUSEN pin of AXP209 PMIC, while the VBUS pin of AXP209 only has a capacitor between it and the ground (this pin is not used for anything else). To sum it up. Only the ID pin (PH4) has a real use. And 5V voltage is always served to the MicroUSB OTG receptacle no matter what is the state of the PB9/PD2 pins. This patch has been tested on pcDuino2 to work fine in a host role with a USB keyboard connected via an OTG cable. It also works fine in a device role (cdc_ether) with a regular Micro-B cable connected to a desktop PC. Signed-off-by: Siarhei Siamashka Signed-off-by: Maxime Ripard

ARM: dts: sun4i: Allow to use the PH6 pin for GPIO on pcDuino1/2

2015-10-11T16:47:42+00:00

The pcDuino1 board does not use any power switches at all for its two USB host ports and the VBUS pins are always connected to 5V. The pcDuino2 board uses the RT9701GB power switch for its single USB host port, but the USB_EN pin (PD2) is pulled up with a 10K resistor. So that the USB power is still enabled by default, resulting in the same behaviour as pcDuino1 if nobody touches the PD2 pin. This minor difference is going to be handled in a follow-up patch, introducing a separate dts file for pcDuino2. The primary reason for this fix is that the current dts file unnecessarily meddles with the PH3 and PH6 pins. But the PH6 pin is available on the Arduino-compatible expansion header and may have a better use for other purposes. This patch fixes the problem and now the PH6 pin can be used with the GPIO sysfs interface. Tested on a pcDuino2 board with a multimeter: echo 230 > /sys/class/gpio/export echo "out" > /sys/class/gpio/gpio230/direction echo 0 > /sys/class/gpio/gpio230/value echo 1 > /sys/class/gpio/gpio230/value USB still works as expected too. Signed-off-by: Siarhei Siamashka Signed-off-by: Maxime Ripard

ARM: dts: sun4i: Add AXP209 PMU regulators for pcDuino1/2

2015-10-05T12:56:11+00:00

This allows voltage-scaling with cpufreq-dt. The reliability of voltage-scaling has been checked by reducing the voltage of all operating points by 0.025V (for extra safety headroom) and running libjpeg-turbo decoding tests on 5 pcDuino2 boards. It means that the standard sun4i voltages should be perfectly fine too. Signed-off-by: Siarhei Siamashka Signed-off-by: Maxime Ripard

ARM: dts: sun4i: Add A10 SRAM and SRAM controller

2015-06-01T09:13:26+00:00

The A10 has a few SRAM that can be mapped either to a device or to the CPU, with the mapping being controlled by a SRAM controller. Add the SRAM controller, the SRAM that it drives and the section that can be used by the various devices. Signed-off-by: Maxime Ripard Acked-by: Arnd Bergmann Acked-by: Hans de Goede Tested-by: Hans de Goede

ARM: sunxi: dt: Remove the FSF address

2015-05-10T08:22:23+00:00

The FSF address triggers a warning on checkpatch, saying that the FSF license is already present in the Linux source code, and that it has already changed in the past. Remove it from our DT, as suggested. Signed-off-by: Maxime Ripard

ARM: sunxi: DT: Add stdout-path property

2015-04-27T06:20:30+00:00

Add UART aliases and stdout-path property for all the Allwinner boards so that we won't have to rely on the bootargs' console= value, while working with legacy bootloaders. While we're at it, also remove the mentions of earlyprintk in the bootargs, that will remove our default bootargs entirely, and allow the kernel to boot on a system even if DEBUG_LL is configured for another system. Signed-off-by: Maxime Ripard

ARM: sun4i: pcduino: Convert to DT label based syntax

2015-04-27T06:20:20+00:00

In order to lessen the amount of duplication of the DT tree, ease the new and follow the trend that prefers to use label based references when overriding DTSI nodes, convert the board to this syntax Signed-off-by: Maxime Ripard

ARM: dts: pcduino: Enable user LED and button support for pcDuino

2015-01-21T08:59:08+00:00

The pcDuino board has LEDs connected to PH15/PH16, and back/home/menu buttons to PH17/18/19 respectively. Enable these via gpio-leds and gpio-keys. This is shared across the v1 and v2 versions of the board. Tested on a v2 and verified against the schematics of a v1. Signed-off-by: Zoltan HERPAI Acked-by: Hans de Goede [Maxime: Added some newlines between the button nodes] Signed-off-by: Maxime Ripard

ARM: sunxi: DT: convert DTs to use common GPIOs includes

2015-01-21T08:58:56+00:00

Replace the various raw GPIO flags by their definition in the common dt-bindings header. Signed-off-by: Maxime Ripard

ARM: sunxi: DT: Convert to device tree includes

2015-01-21T08:58:55+00:00

Prepare the device trees to use the C preprocessor. Signed-off-by: Maxime Ripard