clk: sunxi: add clock-output-names dt property support

sunxi clock drivers use dt node name as clock name, but clock
nodes should be named clk@X, so the names would be the same.
Let the drivers read clock names from dt clock-output-names
property.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
clk: sunxi: update clock-output-names dt binding documentation

clock-output-names is now required for most of sunxi clock nodes, to
provide the name of the corresponding clock. Add the new requirements,
exceptions, as well as examples.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
clk: sunxi: add names for pll5, pll6 parent clocks to factors_data

Some factor clocks, such as the parent clock of pll5 and pll6, have
multiple output names. Add the corresponding names to factors_data
tied to compatible string.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
clk: sunxi: get divs parent clock name from parent factor clock

Divs clocks consist of a parent factor clock with multiple outputs,
and seperate clocks for each output. Get the name of the parent
clock from the parent factor clock, instead of the DT node name.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
ARM: dts: sun4i: rename clock node names to clk@N

Device tree naming conventions state that node names should match
node function. Change fully functioning clock nodes to match and
add clock-output-names to all sunxi clock nodes.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun5i: rename clock node names to clk@N

Device tree naming conventions state that node names should match
node function. Change fully functioning clock nodes to match and
add clock-output-names to all sunxi clock nodes.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun6i: rename clock node names to clk@N

Device tree naming conventions state that node names should match
node function. Change fully functioning clock nodes to match and
add clock-output-names to all sunxi clock nodes.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun7i: rename clock node names to clk@N

Device tree naming conventions state that node names should match
node function. Change fully functioning clock nodes to match and
add clock-output-names to all sunxi clock nodes.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
clk: sunxi: Add Allwinner A20/A31 GMAC clock unit

The Allwinner A20/A31 clock module controls the transmit clock source
and interface type of the GMAC ethernet controller. Model this as
a single clock for GMAC drivers to use.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun7i: Add GMAC clock node to sun7i DTSI

The GMAC uses 1 of 2 sources for its transmit clock, depending on the
PHY interface mode. Add both sources as dummy clocks, and as parents
to the GMAC clock node.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun7i: Add GMAC controller node to sun7i DTSI

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

The A20 has EMAC and GMAC muxed on the same pins.
Add pin sets with gmac function for MII and RGMII mode to the DTSI.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun7i: cubietruck: Enable the GMAC

The CubieTruck uses the GMAC with an RGMII phy.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun7i: cubieboard2: Enable GMAC instead of EMAC

GMAC has better performance and fewer hardware issues.
Use the GMAC in MII mode for ethernet instead of the EMAC.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun7i: a20-olinuxino-micro: Enable GMAC instead of EMAC

GMAC has better performance and fewer hardware issues.
Use the GMAC in MII mode for ethernet instead of the EMAC.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
ARM: dts: sun7i: Add ethernet alias for GMAC

U-Boot will insert MAC address into the device tree image.
It looks up ethernet[0-5] aliases to find the ethernet nodes.
Alias GMAC as ethernet0, as it is the only ethernet controller used.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>