clk: divider: export clk_div_mask() helper ...

commit e6d3cc7 Linux upstream.

  clk: divider: export clk_div_mask() helper

  Export clk_div_mask() in clk-provider header so every clock providers
  derived from the generic clock divider may share the definition instead
  of redefining it.

  Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
  Signed-off-by: Michael Turquette <mturquette@baylibre.com>
  Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: divider: Make generic for usage elsewhere ...

commit bca9690 Linux upstream adjusted
to current Barebox codebase.

  clk: divider: Make generic for usage elsewhere

  Some devices don't use mmio to interact with dividers. Split out the
  logic from the register read/write parts so that we can reuse the
  division logic elsewhere.

  Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
  Tested-by: Kenneth Westfield <kwestfie@codeaurora.org>
  Signed-off-by: Michael Turquette <mturquette@linaro.org>

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: divider: Fix best div calculation for power-of-two and table dividers ...

commit dd23c2c Linux upstream.

  clk: divider: Fix best div calculation for power-of-two and table dividers

  The divider returned by clk_divider_bestdiv() is likely to be invalid in case
  of power-of-two and table dividers when CLK_SET_RATE_PARENT flag isn't set.

  Fixes boot on STiH416 platform.

  Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
  Signed-off-by: Mike Turquette <mturquette@linaro.org>
  [mturquette@linaro.org: trivial merge conflict & updated changelog]

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: divider: Remove unused variable in clk_divider_recalc_rate ...

commit "clk: add divider_recalc_rate helper" reworked
clk_divider_recalc_rate() function and as part of that left one variable
assignment, which is not used later.

Fixes: e27c0b64db01 ("clk: add divider_recalc_rate helper")
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/imx'

clk: at91: fix warning about missing const-safety ...

compiling clk-main.c and clk-generated.c results in:

warning: passing argument 1 of 'memcpy' discards 'const' qualifier from
pointer target type [-Wdiscarded-qualifiers]
  memcpy(clkmain->clk.parent_names, parent_names, parents_array_size);
           ~~~~~~~~~~~~^~~~~~~~~~~~~

Avoid this by replacing the xzalloc+memcpy pair with xmemdup.
Zero-initialization of the buffer isn't necessary, because
memcpy spans the whole buffer.

Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: imx: vf610: correct __iomem 'qualifier' placement ...

__iomem applies to the IOMEM() pointee, not to the auto pointer
that points at it. Move the annotation to correct this.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: at91: delete dead i2s/audio code ...

They aren't used anywhere, thus drop them.

Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: at91: fix compilation errors in sama5d2.c ...

sama5d2.c was added alongside the update to the remaining clk drivers
to support the new upstream device tree bindings, but wasn't wired in
anywhere.

To prepare for usage in future sama5d2 support, fix compilation errors
related to absence of locks and unavailability of audio/i2s clock/pll
handling.

With this change, there are no users for the few definition-less at91
audio/i2s registration function declarations. So remove those as well.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: vf610: improve handling case that cpu frequency can't be changed ...

Currently we get a nasty error message if the cpu clock can't be
changed:
DDRC is clocked by PLL1, can't switch CPU clockinitcall vf610_switch_cpu_clock+0x1/0x198 failed: Invalid argument

So let's do the following:
- factor out the check from vf610_switch_cpu_clock_to_500mhz() and
  vf610_switch_cpu_clock_to_400mhz
- if clock can't be changed, don't treat it as an error
- don't call clock notifier chain if clock can't be changed
- add trailing newline to the warning message

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: i.MX25: Add some more clocks ...

Add some clocks needed for:
- RNGB
- SCC
- Dryice RTC

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

clk: socfpga: fix compiler warnings for Cyclone5 ...

When building for Cyclone5 SoCFPGA, the socfpga_a10_pll_init(),
socfpga_a10_perith_init() and socfpga_a10_gate_init() functions are
defined as dummy functions returning ERR_PTR(-ENOSYS).  They are defined
with external linkage.  With '-Wmissing-prototypes' GCC warns about
externally linked function definitions with no preceding prototype.
Define them as 'static inline' to avoid the compiler warnings.

(Note: Arria10 uses non-dummy versions of these functions declared
'extern' but defined elsewhere.)

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/zynqmp'

Merge branch 'for-next/warnings'

Merge branch 'for-next/stm32'

treewide: Make locally used functions static ...

Many functions are only used locally but still are globally visible.
Make these function static. Avoids warnings generated with -Wmissing-prototypes

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

clk: add ZynqMP clock driver ...

The ZynqMP has a platform management unit (PMU) that is responsible for
managing the clocks. Therefore, the clock driver uses the firmware
driver to control the clocks.

The Barebox driver is based on the Linux driver, but contains deviations
to make the driver more readable and more consistent.

Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

clk: Add Layerscape clk support ...

This adds support for the clock controller found on Layerscape
SoCs. This is mostly an adoption of the corresponding Linux
driver. This is tested on the LS1046a SoC. Other ARM based Layerscape
SoCs should work aswell, support for the PowerPC based SoCs has
been removed.

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

ARM: stm32mp1: Add clk driver ...

Taken from Linux v5.0-rc2. Mostly as-is, only adopted to the differences
between the Linux and barebox clk API.

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

clk: mux: Support CLK_SET_RATE_NO_REPARENT flag ...

Since barebox doesn't do reparenting on rate changes we only have
to define the flag.

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

clk: mux: Support CLK_MUX_READ_ONLY flag ...

Support readonly dividers using the CLK_MUX_READ_ONLY flag.

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

clk: mux: Support mux specific flags ...

We'll need mux specific flags in the future, so add a parameter to
the mux initialization functions.

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

clk: divider: Support CLK_DIVIDER_READ_ONLY flag ...

To support a readonly divider add the CLK_DIVIDER_READ_ONLY flag.

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

clk: divider: pass divider flags ...

The generic clk divider needs clock flags and divider flags. Fix
prototypes to take both as separate arguments.

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

clk: Support CLK_IS_CRITICAL flag ...

Support CLK_IS_CRITICAL flag. Simply do not disable the clock even when
the enable count is zero.

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

clk: Make CLK_IGNORE_UNUSED generic ...

barebox will never disable unused clocks, so add CLK_IGNORE_UNUSED as a
no-op flag. With this we can keep the changes to the imported kernel
code smaller.

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

clk: export clk_gate_is_enabled() ...

Will be needed by stm32 clk support.

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

clk: parent_names should be const ...

Not only the array of pointers should be const, but also the strings
they point to. Add missing const.

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

clk: clk-composite: return parent_rate if no rate clk ...

When a composite clock has no rate clock then it should output the
parents rate.

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

Merge branch 'for-next/imx8-usb'