factorise some generic infrastructure to assist looking up struct clks
for the ARM & SH architecture.
as the code is identical at 99%
put the arch specific code for allocation as example in asm/clkdev.h
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This patch converts the remaining sh7786 clocks
to use clkdev for lookup. The now unused name
and id from struct clk are also removed.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Remove the name parameter from SH_CLK_DIV4() and
adjust the processor specific code. The lookup
happens using clkdev so the name is unused.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Remove the name and the id from SH_CLK_MSTP32().
Now when lookups are handled by clkdev they are
not needed anymore.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This patch adds sh7786 MSTP enums for mstp_clks[] index.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This plugs in clkdev lookups for the SH7786 clocks and migrates off of
clock string usage for the TMU clocks.
Previously the TMU clocks were aliased to the peripheral clock, so this
gets the driver actually toggling the proper clocks now as well.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This fixes up some of the I/D/F clock ambiguity in the sh-sci driver.
The interface clock in most cases just wraps back to the peripheral
clock, while the function clock wraps in to the MSTP bits. As the logic
was somewhat inverted, this cleans that up, and also enables all CPUs
with SCI MSTP bits to match function clocks through clkdev lookup.
As a result, this gets rid of the clk string abuse on the sh side, and
the clock string will be killed off once the ARM code has had a chance to
sync up. This also enables MSTP gating on CPUs like 7786 which had never
wired it up before. Impacted CPUs are primarily all SH-Mobiles, SH7785,
and SH7786.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This patch introduces struct clk_div4_table. The structure
will be used to keep div4 specific data, and is with this
patch replacing the struct clk_div_mult_table pointer arg
used by the sh_clk_div4_register() functions.
Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This rewrites the SH7786 clock framework support completely. It's
reworked to provide all of the DIV4 and MSTP function clocks. This brings
it in line with the current clock framework code and lets us drop SH7786
from the list of CPUs that require legacy CPG handling.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This moves out the old legacy CPG clocks to their own file, and converts
over the existing users. With these clocks going away and each CPU
dealing with them on their own, CPUs can gradually move over to the new
interface.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
CPUs registering on-chip clocks should be using arch_clk_init() with the
new scheme so that the CPUs have the opportunity to establish the
topology prior to the initial root clock rate propagation. This ensures
that CPUs with on-chip clocks that use CLK_ENABLE_ON_INIT are properly
enabled at the initial propagation time, without having to further poke
the root clocks.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This tidies up the set_rate hack that the on-chip clocks were abusing to
trigger rate propagation, which is now handled generically.
Additionally, now that CLK_ENABLE_ON_INIT is wired up where it needs to
be for these clocks, the clk_enable() can go away. In some cases this was
bumping up the refcount higher than it should have been.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
There is no real distinction here in behaviour, either a clock needs to
be enabled on initialiation or not. The ALWAYS_ENABLED flag was always
intended to only apply to clocks that were physically always on and could
simply not be disabled at all from software. Unfortunately over time this
was abused and the meaning became a bit blurry.
So, we kill off both of all of those paths now, as well as the newer
NEEDS_INIT flag, and consolidate on a CLK_ENABLE_ON_INIT. Clocks that
need to be enabled on initialization can set this, and it will purposely
enable them and bump the refcount up.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This adds preliminary support for the SH7786 CPU subtype.
While this is a dual-core CPU, only UP is supported for now. L2 cache
support is likewise not yet implemented.
More information on this particular CPU subtype is available at:
http://www.renesas.com/fmwk.jsp?cnt=sh7786_root.jsp&fp=/products/mpumcu/superh_family/sh7780_series/sh7786_group/
Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
