ARM: sunxi: Add support for Allwinner SUNXi SoCs sata to ahci_platform

This patch adds support for the ahci sata controler found on Allwinner A10
and A20 SoCs to the ahci_platform driver.

Orignally written by Olliver Schinagl using the approach of having a platform
device which probe method creates a new child platform device which gets
driven by ahci_platform.c, as done by ahci_imx.c .

Refactored by Hans de Goede to add most of the non sunxi specific functionality
to ahci_platform.c and use a platform_data pointer from of_device_id for the
sunxi specific bits.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ahci-imx: Port to library-ised ahci_platform

This avoids the ugliness of creating a nested platform device from probe.

Tested on a wandboard i.mx6 quad.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ahci-imx: Add imx_ahci_phy_init / _exit helpers

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ahci-imx: Fix link not coming back up after suspend / resume

The phy needs to be re-initialized on resume for the link to properly come
back up.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ARM: sun4i: dts: Add ahci / sata support

This patch adds sunxi sata support to A10 boards that have such a connector.
Some boards also feature a regulator via a GPIO and support for this is also
added.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ARM: sun7i: dts: Add ahci / sata support

This patch adds sunxi sata support to A20 boards that have such a connector.
Some boards also feature a regulator via a GPIO and support for this is also
added.

Signed-off-by: Olliver Schinagl <oliver@schinagl.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ARM: sunxi: select ARM_PSCI

This is necessary for SMP on sun7i.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
reset: Add of_reset_control_get

In some cases, you might need to deassert from reset an hardware block that
doesn't associated to a struct device (CPUs, timers, etc.).

Add a small helper to retrieve the reset controller from the device tree
without the need to pass a struct device.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
clocksource: sun5i: Add support for reset controller

The Allwinner A31 that uses this timer has the timer IP asserted in reset.
Add an optional reset property to the DT, and deassert the timer from reset if
it's there.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
ARM: sun6i: a31: Add support for the High Speed Timers

The Allwinner A31 has support for four high speed timers. Apart for the
number of timers (4 vs 2), it's basically the same logic than the high
speed timers found in the sun5i chips.

Now that we have a driver to support it, we can enable them in the
device tree.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
clk: sunxi: Allwinner A20 output clock support

This patch adds support for the external clock outputs on the
Allwinner A20 SoC. The clock outputs are similar to "module 0"
type clocks, with different offsets and widths for clock factors.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun7i: external clock outputs

This commit adds the two external clock outputs available on A20 to
its device tree. A dummy fixed factor clock is also added to serve as
the first input of the clock outputs, which according to AW's A20 user
manual, is the 24MHz oscillator divided by 750.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
pinctrl: sunxi: Add Allwinner A20 clock output pin functions

This patch adds the clock output pin functions on the A20.
The 2 pins can output a configurable clock to be used by
external modules. This is used on the CubieTruck, to supply
a 32768 Hz low power clock to the onboard Wifi+BT module.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun7i: Add pin muxing options for clock outputs

This patch adds the clock output pin options on the A20.
The 2 pins can output a configurable clock to be used by
external modules. This is used on the CubieTruck, to supply
a 32768 Hz low power clock to the onboard Wifi+BT module.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
input: Add new sun4i-ts driver for Allwinner sunxi SoC's rtp controller

Note the sun4i-ts controller is capable of detecting a second touch, but when
a second touch is present then the accuracy becomes so bad the reported touch
location is not useable.

The original android driver contains some complicated heuristics using the
aprox. distance between the 2 touches to see if the user is making a pinch
open / close movement, and then reports emulated multi-touch events around
the last touch coordinate (as the dual-touch coordinates are worthless).

These kinds of heuristics are just asking for trouble (and don't belong
in the kernel). So this driver offers straight forward, reliable single
touch functionality only.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
input: sun4i-ts: Add support for temperature sensor

The sun4i resisitive touchscreen controller also comes with a built-in
temperature sensor. This commit adds support for it.

This commit also introduces a new "ts-attached" device-tree property,
when this is not set, the input part of the driver won't register. This way
the internal temperature sensor can be used to measure the SoC temperature
independent of there actually being a touchscreen attached to the controller.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ARM: dts: sun4i: Add rtp controller node

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ARM: dts: sun5i: Add rtp controller node

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
ARM: dts: sun7i: Add rtp controller node

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
input: Add new sun4i-lradc-keys driver

Allwinnner sunxi SoCs have a low resolution adc (called lradc) which is
specifically designed to have various (tablet) keys (ie home, back, search,
etc). attached to it using a resistor network. This adds a driver for this.

There are 2 channels, currently this driver only supports chan0 since there
are no boards known to use chan1. The devicetree properties are already
prefixed with chan0 as preparation for chan1 support in the future.

This has been tested on an olimex a10s-olinuxino-micro, a13-olinuxino, and
a20-olinuxino-micro.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>