clk: Add Altera SoCFPGA clk support ...

The SoCFPGA currently has all clocks described in the devicetree which
makes common clock support a straight forward task.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: of: introduce of_clk_src_simple_get ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i.MX28: unbreak ethernet ...

since the switch to common clock, ethernet driver doesn't works and
and access to the network leads to :
eth0: Read MDIO failed...
unable to handle NULL pointer dereference at address 0x000000c7

The problem is that bit 31 (SLEEP) of register HW_CLKCTRL_ENET is kept
to its default value (1) which means : "put Ethernet block in sleep mode.
CLK_H_MAC0(1), CLK_H_MAC0(1)_S, and CLK_ENET0(1)_TX are gated off.
Ethernet can be wakeup remotely in sleep mode"
In that case the FEC don't get its clock.

This patch fix the problem by toggling this bit when FEC's clock is
enabled.

Tested on i.MX28EVK.

Signed-off-by: Eric Bénard <eric@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: mvebu: add OF clock providers for Marvell MVEBU SoCs ...

This adds of_clk_providers for core clocks and clock gates found on
Marvell MVEBU SoCs (Armada 370, Armada XP, Dove, and Kirkwood).
It is based on Linux clock providers with clock flags removed, as they
are not used on Barebox.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Cleanup Kconfig files ...

This patch provides a global cleanup barebox Kconfig files. This includes
replacing spaces to tabs, formatting in accordance format.
No functional changes.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: provide static inline wrappers ...

So that drivers can use clk_* functions without having to ifdef
them away.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: mxs: make ssp gates parents of ssp dividers ...

When changing the rates of the ssp clocks we have to poll the
busy bit, but only when they are enabled. The current code can
not check this properly since the gates are registered as children
of the dividers. This has the effect that when the gate is disabled
the busy bit will be set forever resulting in a freezed system.

Fix this by making the gates parents of the dividers which allows
clk_is_enabled to return the correct result.

The Kernel has the same problem, but here the busy polling is
limited to 10ms, so probably noone noticed this.

The datasheet mentions that the ssp dividers shall only be changed
when the clocks are enabled. The kernel and barebox currently ignore
this. I don't know what effect violating this rule has.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

tegra: add peripheral clocks ...

Only UART clocks are included for now, but the code should cover
other peripherals needs, too.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

tegra: add new clock framework driver ...

This removes the existing Tegra CAR driver and replaces it with code
ported from the Linux clock framework.

In the current state only the relevant PLLs are supported, but this is
no functional regression from the existing code.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: allow to instanciate clk mux without registering it ...

Allows to reuse clk mux code within other clocks.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: allow to instanciate clk gate without registering it ...

Allows to reuse the clk gate code within other clocks.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: add clock lookup from devicetree ...

Taken from the Linuxkernel with some small adjustments for barebox.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: MXS: Add is_enabled callback for clkref ...

Signed-off-by: Juergen Beisert <j.beisert@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: MXS: add clk drivers ...

This adds support for the i.MX23 and i.MX28 clock modules. This mostly is
a copy from the kernel.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: MXS: Add MXS specific clk types ...

MXS needs some special MXS specific clock types:

- pll
- ref (fractional divider)
- busy divider (divider with additional busy bit to poll on a rate change)
- lcdif (Combined clock out of a fractional divider, a divider and a gate.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: add prototype for clk_is_enabled ...

On MXS we need to poll the busy bit when changing a clock rate, but only
when the parent clocks are enabled. This exposes the already present
function clk_is_enabled which is suitable for this job.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: gate: Add inverted gate support ...

This adds support for gates which need 0 to enable.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: divider: Add onebased divider support ...

In some dividers the register value matches the divider value. This
patch adds support for them.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: fix warning: no previous prototype for 'clk_is_enabled' ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clkdev: fix typo ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

clk: remove unused __clk_[get|put] ...

This is some unused code resulting from copying stuff from the
kernel. Remove it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: Add is_enabled callback ...

This allows us to better detect whether a clk is enabled or not.

- If we can ask a clk, ask it. If it's enabled, go on and ask parents
- If we can't ask it, but it can be enabled, depend on the enable_count.
  if it's positive, go on and ask parents
- If we can't ask it and it cannot be enabled, assume it is enabled
  and ask parents.

This makes the CLK_ALWAYS_ENABLED unnecessary, since the fixed clk now
always returns 1 in its is_enabled callback.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'kconfig'

Remove bad Kconfig reference to HAVE_CLK ...

Barebox not contain symbol HAVE_CLK, so remove all references to it.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'pu/clk' into for-next/clk ...

Conflicts:
	include/linux/clk.h

clk: use the 'CLK_ALWAYS_ENABLED' flag for clk-fixed by default ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: Add clk table based divider support ...

For easy support of table based dividers.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands: clk_dump: denote always enabled clocks ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: add always enabled clocks ...

Current barebox clk framework allow disable any clock
and there is no means to prevent that.

But there are the clocks that can't be disabled
by software at all.

This patch allow registration of a clock immune to clk_disable().

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>