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During bug hunt of a clocking issue that ultimately turned out to be
unrelated, I resynced AT91 clk support with Linux.
The changes look more extensive than they really are, because I first
imported the clock drivers before a major overhaul of the barebox clock
framework to be more compatible with the more recent kernel API changes.
Most of the diff is due to that, but this resync also fixes
at least a USB issue for the at91rm9200 and adds support for
the new SAMA7 SoC as well as more clocks for the SAM9x60. Both these
SoCs aren't supported by barebox yet, but this at least adds clock
driver support.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20240215121837.251013-4-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Now that there are no longer any users of regmap.h in headers, let's
switch all users in the source files to linux/regmap.h.
That way, the only users of regmap.h whether directly or indirectly will
be out-of-tree code, which will fail with an error if they are dependent
on the old semantics of regmap_bulk_read and regmap_bulk_write.
After a transitory period, we can then drop regmap.h.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20231020071853.2826528-12-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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In Linux the ops in struct clk_ops take a struct clk_hw * argument
instead of a struct clk * argument as in barebox. With this taking
new clk drivers from Linux requires a lot of mechanical conversions.
Instead of doing this over and over again swallow the pill once and
convert the existing barebox code over to clk_hw.
The implementation is a little different from Linux. In Linux struct clk
is only known to the core clock code. In barebox struct clk is
publically known and it is embedded into struct clk_hw. This allows
us to still use struct clk members in the clock drivers which we
currently still need, because otherwise this patch would be even
bigger.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.barebox.org/20210602095507.24609-5-s.hauer@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Linux has a clk_register() function with a different semantics than
barebox. Rename this function to bclk_register() so that we later
can introduce a clk_register() function with the same semantics as
Linux.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20210602095507.24609-4-s.hauer@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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During a bug hunt that ultimately turned out unrelated to the state
of the barebox at91 clk driver, I synchronized its state with Linux v5.6.
Bug fixes and clean up to minimize the diff were split out in separate
prior commits. This last commit imports the rest, which is basically
support for Microchip's new ARM926EJ-S SoC, the SAM9x60.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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While redundant in barebox, it makes our diff to the upstream driver
smaller when synchronizing, so add it back.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Some of these are a product of source sync with Linux, the other were
done with macro assistance by searching for /later/, deleting license text,
adding appropriate SPDX-License-Identifier and manual post-review.
Devices without a license indicated where assumed GPL-2.0-only according
with the project's license.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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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>
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Based on kernel 5.0-rc6 update at91 clk support
to match the new PMC bindings.
Manually added all changes done in the kernel from 4.9-rc3 to 5.0-rc6.
New drivers required was added as seperate commits.
This includes dt-compat code required to support at91sam5d3,
as this is not yet ported to use the new PMC bindings.
clk-programmable saw some extra changes - it had never been bulit.
It is used only by at91sama5d2 - and barebox has no board support for
this cpu (yet).
The CONFIG_SOC symbols is used to select the relevant drivers.
CONFIG_SOC_SAM9 selects several drivers, and in the future
this can be split to keep the image size down.
In the kernel CLK_OF_DECLARE_DRIVER() can be used for a two step init.
In barebox this is a simple one step init.
It was added to have less differences between the kernel and the barebox
versions of the drivers.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Tested-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Following warning was reported during boot with
at91sam9263ek with DT enabled.
"Main crystal frequency not set, using approximate value"
This occured due to a missing parent in clk_rm9200_main.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
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Port at91 DT clock code from Linux 4.9-rc3.
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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