Skip to content
  1. Oct 12, 2015
    • Siarhei Siamashka's avatar
      ARM: dts: sun4i: Enable USB DRC on pcDuino1/2 · 5d0c8b19
      Siarhei Siamashka authored 
      

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><default><default>
    usb_det_vbus_gpio = port:PH05<0><0><default><default>
    usb_drv_vbus_gpio = port:PB09<1><0><default><0>
While the pcDuino2 FEX has:
    usb_id_gpio = port:PH04<0><1><default><default>
    usb_det_vbus_gpio = port:PH05<0><0><default><default>
    usb_drv_vbus_gpio = port:PD02<1><0><default><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: default avatarSiarhei Siamashka <siarhei.siamashka@gmail.com>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
      5d0c8b19
    • Siarhei Siamashka's avatar
      ARM: sun4i: dt: Add new LinkSprite pcDuino2 board · d6f17def
      Siarhei Siamashka authored 
      

The LinkSprite pcDuino2 board is almost identical to the older
LinkSprite pcDuino1 board according to the schematic pdf files.
So we just include the existing "sun4i-a10-pcduino.dts" file and
make the necessary adjustments.

Signed-off-by: default avatarSiarhei Siamashka <siarhei.siamashka@gmail.com>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
      d6f17def
    • Siarhei Siamashka's avatar
      ARM: dts: sun4i: Allow to use the PH6 pin for GPIO on pcDuino1/2 · 96521b72
      Siarhei Siamashka authored 
      

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: default avatarSiarhei Siamashka <siarhei.siamashka@gmail.com>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
      96521b72
    • Hans de Goede's avatar
      ARM: dts: sun7i: Enable USB DRC on Bananapi · dcfd8443
      Hans de Goede authored 
      

Enable the otg/drc usb controller on the Bananapi.

Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
      dcfd8443
    • Timo Sigurdsson's avatar
      ARM: dts: sunxi: Add regulators for LeMaker BananaPi · a15b80fb
      Timo Sigurdsson authored 
      

sun7i-a20-bananapi.dts doesn't contain regulator nodes for the AXP209 PMU
driver, so add them to allow for voltage-scaling with cpufreq-dt. Also
add board-specific OPP to use slightly higher voltages at lower
frequencies since Kevin Hilman reported that not all BananaPi boards run
stable at the default voltages inherited by sun7i-a20.dtsi.

Signed-off-by: default avatarTimo Sigurdsson <public_timo.s@silentcreek.de>
Signed-off-by: default avatarMaxime Ripard <maxime.ripard@free-electrons.com>
      a15b80fb
  3. Oct 07, 2015
  5. Oct 05, 2015
  7. Oct 01, 2015
  9. Sep 29, 2015
  11. Sep 28, 2015
  13. Sep 27, 2015