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For Linux, It's always correct to substitute any of the read or
write _relaxed functions with their non relaxed counterpart.
Define functions that do this.
Unlike with Linux, they doesn't per se affect performance: barebox
writel doesn't imply memory barriers, instead it depends on
the architecture support to map IO memory regions as non-bufferable.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Link: https://lore.barebox.org/20210611080155.3555976-1-ahmad@a3f.at
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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The gpio-mmio driver in Linux v5.12 has evolved quite a bit since the
last sync. It now supports big endian byte order, 64-bit registers as
well as controllers that have both a dirin and dirout register.
The latter is particularly interesting, because it's required for the
SiFive GPIO controller ported in a later patch.
This commit also touches gpio-mpc8xxx used on the LS1046A.
Because bit and byte endianness can now be configured separately,
the driver needs adjustment. We don't seem to support any boards
that have the peripheral as little-endian, but this is fixed by this
commit. Comparing other bgpio_init users with Linux shows no need for
further fixups.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20210427202309.32077-9-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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information
According to our /README, GPL-2.0-only applies for the whole project
except noted otherwise.
Signed-off-by: Roland Hieber <rohieb@rohieb.name>
Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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Commit 2e6a88f2101d (add cpu native ordered io accessors) introduced
these macros and then commit be57f20cdd7d (Fix big endian MMIO
primitives) figured out they are equivalent to __raw_{read,write}*.
They turned out unnecessary after all. Anyway, most source files
use __raw_read* and __raw_write*.
Let's replace a few remaining references and abolish them.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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cpu_read*() and cpu_wrire*() are precisely equal to __raw_read*() and
__raw_write*().
Striving for correctness we can replace all those __raw_*() with cpu_*()
as that's exactly what the former ones do.
Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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There are no generic native ordered io accessors. This sometimes
leads to
v = in_be32(a);
v = readl(a);
in generic drivers. Instead, use io accessors which are explicitely
native ordered.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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To allow for some generic io accessors introduce io.h and use
this instead of asm/io.h throughout the tree.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
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