Support the following DT properties:
"bias-disable"
"bias-pull-up"
"bias-pull-down"
"bias-pull-pin-default"
"input-enable"
"input-disable"
My main motivation is to support pull up/down biasing. For Pro5 and
later SoCs, the pupdctrl register number is the same as the pinmux
number, so this feature can be supported without having big pin
tables.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Marek reports warnings in UniPhier pinctrl drivers when compiled by
GCC 6.x, like:
drivers/pinctrl/uniphier/pinctrl-uniphier-ld20.c:58:18: warning:
'usb3_muxvals' defined but not used [-Wunused-const-variable=]
static const int usb3_muxvals[] = {0, 0};
^~~~~~~~~~~~
My intention here is to compile minimum set of pin data for SPL to
save memory footprint, but GCC these days is clever enough to notice
unused data arrays.
We can fix it by sprinkling around __maybe_unused on those arrays,
but I did not do that because they are counterparts of the pinctrl
drivers in Linux. All the pin data were just copy-pasted from Linux
and are kept in sync for maintainability.
I chose a bit tricky way to fix the issue; calculate ARRAY_SIZE of
*_pins and *_muxvals and set their sum to an unused struct member.
This trick will satisfy GCC because the data arrays are used anyway,
but such data arrays will be dropped from the final binary because
the pointers to them are not used.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reported-by: Marek Vasut <marex@denx.de>
On LD4 SoC or later, the pin-mux registers are 8bit wide, while 4bit
wide on sLD3 SoC. Support it for the sLD3 pinctrl driver.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
These macros are only referenced in pinctrl-uniphier-core.c, so
they need not reside in a header file.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This does not have much impact on behavior, but makes code look more
more like Linux. The use of devm_ioremap() often helps to delete
.remove callbacks entirely.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
PH1-LD4 and PH1-sLD8 SoCs have pins that support pin configuration
(pin biasing, drive strength control), but not pin-muxing.
Allow to fill the mux value table with -1 for those pins; pins with
mux value -1 will be skipped in the pin-mux set function. The mux
value type should be changed from "unsigned" to "int" in order to
accommodate -1 as a special case.
[ Linux commit: 363c90e743b50a432a91a211dd8b078d9df446e9 ]
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
PH1-LD11 and PH1-LD20 have much pin controlling in common, so I
added a single driver shared between them in the initial commit.
However, the Ethernet pin-mux settings I am going to add are
different with each other, and they may diverge more as the
progress of development. Split it into two dedicated drivers.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, the UniPhier pinctrl driver itself is a syscon, but it
turned out much more reasonable to make it a child node of a syscon
because our syscon node consists of a bunch of system configuration
registers, not only pinctrl, but also phy, and misc registers.
It is difficult to split the node. This commit allows to migrate to
the new DT structure.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
I found many mistakes in the initial version.
Fixes: 8a3328c209 ("pinctrl: uniphier: support UniPhier PH1-LD20 pinctrl driver")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The pinmux of PH1-LD11 is almost a subset of that of PH1-LD20
(as far as used in boot-loader), so this commit makes the driver
shared between the two SoCs.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Upcoming new pinctrl drivers for PH1-LD11 and PH-LD20 support input
signal gating for each pin. (While, existing ones only support it
per pin-group.) This commit prepares the core part for that.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The core part of the UniPhier pinctrl driver needs to support a new
capability for upcoming UniPhier ARMv8 SoCs. This sometimes happens
because pinctrl drivers include really SoC-specific stuff.
This commit intends to tidy up SoC-specific parameters of the existing
drivers before adding new ones. Having flags would be better than
adding new members every time a new SoC-specific capability comes up.
At this time, there is one flag, UNIPHIER_PINCTRL_CAPS_DBGMUX_SEPARATE.
This capability (I'd say rather quirk) was added for PH1-Pro4 and
PH1-Pro5 as requirement from our customer. For those SoCs, one pin-mux
setting is controlled by the combination of two separate registers; the
LSB bits at register offset (8 * N) and the MSB bits at (8 * N + 4).
Because it is impossible to update two separate registers atomically,
the LOAD_PINCTRL register should be set in order to make the pin-mux
settings really effective.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, fdtdec_get_addr_size() does not support the address
translation, so it cannot handle device trees with non-straight
"ranges" properties. (This would be a problem with DTS for UniPhier
ARMv8 SoCs.)
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The current CONFIG names like "CONFIG_ARCH_UNIPHIER_PH1_PRO4" is too
long. It would not hurt to drop "PH1_" because "UNIPHIER_" already
well specifies the SoC family. Also, rename files for consistency.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
CONFIG_PINCTRL_UNIPHIER is more suitable than CONFIG_ARCH_UNIPHIER
to guard the drivers/pinctrl/uniphier directory.
The current CONFIG_PINCTRL_UNIPHIER_CORE is a bit long, so rename it
into CONFIG_PINCTRL_UNIPHIER.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
While IECTRL is disabled, input signals are pulled-down internally.
If pin-muxing is set up first, glitch signals (Low to High transition)
might be input to hardware blocks.
Bad case scenario:
[1] The hardware block is already running before pinctrl is handled.
(the reset is de-asserted by default or by a firmware, for example)
[2] The pin-muxing is set up. The input signals to hardware block
are pulled-down by the chip-internal biasing.
[3] The pins are input-enabled. The signals from the board reach the
hardware block.
Actually, one invalid character is input to the UART blocks for such
SoCs as PH1-LD4, PH1-sLD8, where UART devices start to run at the
power on reset.
To avoid such problems, pins should be input-enabled before muxing.
[ ported from Linux commit bac7f4c1bf5e7c6ccd5bb71edc015b26c77f7460 ]
Fixes: 5dc626f836 ("pinctrl: uniphier: add UniPhier pinctrl core support")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
BUILD_BUG_* macros have been defined in several headers. It would
be nice to collect them in include/linux/bug.h like Linux.
This commit is cherry-picking useful macros from include/linux/bug.h
of Linux 4.4.
I did not import BUILD_BUG_ON_MSG() because it would not work if it
is used with include/common.h in U-Boot. I'd like to postpone it
until the root cause (the "error()" macro in include/common.h causes
the name conflict with "__attribute__((error()))") is fixed.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
After consulting with some of the SPDX team, the conclusion is that
Makefiles are worth adding SPDX-License-Identifier tags too, and most of
ours have one. This adds tags to ones that lack them and converts a few
that had full (or in one case, very partial) license blobs into the
equivalent tag.
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
I want these prefixed with CONFIG_ARCH_UNIPHIER_ to clarify
they belong to UniPhier SoC family.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The core support for the pinctrl drivers for all the UniPhier SoCs.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
