Commit graph

37 commits

Author SHA1 Message Date
Masahiro Yamada
6a6b9d5dfd pinctrl: uniphier: support pin configuration
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>
2017-02-23 08:37:56 +09:00
Masahiro Yamada
7434bfa0e3 pinctrl: uniphier: support UniPhier PXs3 pinctrl driver
Add pin configuration and pinmux support for UniPhier PXs3 SoC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-01-22 16:49:34 +09:00
Masahiro Yamada
2cfa35c47b pinctrl: uniphier: fix Ethernet (RMII) pin-mux setting for LD20
Fix the pin-mux values for the MDC, MDIO, MDIO_INTL, PHYRSTL pins.

Fixes: fc9da85c60 ("pinctrl: uniphier: add Ethernet pin-mux settings")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2017-01-18 01:24:14 +09:00
Masahiro Yamada
935e09cdcb pinctrl: uniphier: fix unused-const-variable warnings for GCC 6.x
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>
2016-10-18 14:06:46 +09:00
Masahiro Yamada
24572db909 pinctrl: uniphier: add UniPhier sLD3 pinctrl driver
Add pin-mux support for UniPhier sLD3 SoC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-09-18 23:10:17 +09:00
Masahiro Yamada
bbb119800f pinctrl: uniphier: support 4bit-width pin-mux register capability
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>
2016-09-18 23:10:11 +09:00
Masahiro Yamada
cdc7e3cb32 pinctrl: uniphier: move register base macros from header to .c file
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>
2016-09-14 22:54:19 +09:00
Masahiro Yamada
865a39a23f pinctrl: uniphier: add System Bus pin-mux settings
This is needed to get access to UniPhier System Bus (external bus).

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-09-14 22:54:19 +09:00
Masahiro Yamada
4e3d84066e ARM: uniphier: use (devm_)ioremap() instead of map_sysmem()
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>
2016-07-24 00:13:10 +09:00
Masahiro Yamada
fc9da85c60 pinctrl: uniphier: add Ethernet pin-mux settings
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-07-02 05:44:30 +09:00
Masahiro Yamada
64c1cc4cc5 pinctrl: uniphier: avoid building unneeded pin-mux tables for SPL
SPL does not use all of the devices, so we can save some memory
footprint.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-07-02 05:44:30 +09:00
Masahiro Yamada
5e25b9d5d9 pinctrl: uniphier: support pin configuration for dedicated pins
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>
2016-07-02 05:44:29 +09:00
Masahiro Yamada
3379987e26 pinctrl: uniphier: split pinctrl driver for PH1-LD11 and PH1-LD20
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>
2016-07-02 05:44:29 +09:00
Masahiro Yamada
186c133444 pinctrl: uniphier: allow to have pinctrl node under syscon node
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>
2016-07-02 05:44:29 +09:00
Masahiro Yamada
aac641bcf4 pinctrl: uniphier: remove unneeded pin group nand_cs1
This SoC does not support NAND CS1.  This place-holder is no longer
necessary.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-06-30 23:49:26 +09:00
Masahiro Yamada
69da34c073 pinctrl: uniphier: fix NAND pin-mux setting for PH1-LD11/LD20
My mistake in the initial support patch.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-06-30 23:49:26 +09:00
Masahiro Yamada
4d1065c8d8 pinctrl: uniphier: remove wrong pin-mux functions for ProXstream2
These are pin group names, not function names.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-06-30 23:49:26 +09:00
Masahiro Yamada
740314326d pinctrl: uniphier: fix NAND and SD pin-mux settings for PH1-LD11/LD20
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>
2016-04-24 09:53:54 +09:00
Masahiro Yamada
ac13ce49a4 pinctrl: uniphier: rename function/array names
Make function/array names match the file names for consistency.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-04-24 09:53:54 +09:00
Masahiro Yamada
6105aa2f2a pinctrl: uniphier: support UniPhier PH1-LD11 pinctrl driver
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>
2016-04-01 00:57:19 +09:00
Masahiro Yamada
8a3328c209 pinctrl: uniphier: support UniPhier PH1-LD20 pinctrl driver
Add pin configuration and pinmux support for UniPhier PH1-LD20 SoC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-04-01 00:57:15 +09:00
Masahiro Yamada
3b05b5f0e4 pinctrl: uniphier: support per-pin input enable for new SoCs
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>
2016-04-01 00:56:07 +09:00
Masahiro Yamada
8cc92b996d pinctrl: uniphier: introduce capability flag
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>
2016-04-01 00:54:00 +09:00
Masahiro Yamada
510454db04 pinctrl: uniphier: use devm_get_addr() to get base address
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>
2016-04-01 00:17:25 +09:00
Masahiro Yamada
ea65c98050 ARM: uniphier: drop PH1- prefix from CONFIG options and file names
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>
2016-03-24 01:42:13 +09:00
Masahiro Yamada
1d22c4b1bd pinctrl: uniphier: guard uniphier directory with CONFIG_PINCTRL_UNIPHIER
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>
2016-03-09 01:11:04 +09:00
Masahiro Yamada
fdd15b6a86 pinctrl: uniphier: set input-enable before pin-muxing
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>
2016-03-09 01:10:52 +09:00
Masahiro Yamada
84b8bf6d5d bug.h: move BUILD_BUG_* defines to include/linux/bug.h
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>
2016-01-25 10:39:59 -05:00
Tom Rini
da58dec866 Various Makefiles: Add SPDX-License-Identifier tags
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>
2015-11-10 09:19:52 -05:00
Masahiro Yamada
8497ccc4c2 ARM: uniphier: rename CONFIG_MACH_* to CONFIG_ARCH_UNIPHIER_*
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>
2015-09-25 00:27:53 +09:00
Masahiro Yamada
080b7a5b45 pinctrl: uniphier: add UniPhier PH1-LD6b pinctrl driver
Add pin configuration and pinmux support for UniPhier PH1-LD6b SoC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-09-25 00:27:47 +09:00
Masahiro Yamada
833de5fafb pinctrl: uniphier: add UniPhier ProXstream2 pinctrl driver
Add pin configuration and pinmux support for UniPhier ProXstream2
SoC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-09-25 00:26:27 +09:00
Masahiro Yamada
b82ca82ed2 pinctrl: uniphier: add UniPhier PH1-Pro5 pinctrl driver
Add pin configuration and pinmux support for UniPhier PH1-Pro5 SoC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-09-25 00:25:29 +09:00
Masahiro Yamada
06b2ae5890 pinctrl: uniphier: add UniPhier PH1-sLD8 pinctrl driver
Add pin configuration and pinmux support for UniPhier PH1-sLD8 SoC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-09-25 00:24:30 +09:00
Masahiro Yamada
a343812461 pinctrl: uniphier: add UniPhier PH1-Pro4 pinctrl driver
Add pin configuration and pinmux support for UniPhier PH1-Pro4 SoC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-09-25 00:23:15 +09:00
Masahiro Yamada
e4410e8207 pinctrl: uniphier: add UniPhier PH1-LD4 pinctrl driver
Add pin configuration and pinmux support for UniPhier PH1-LD4 SoC.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2015-09-25 00:21:13 +09:00
Masahiro Yamada
5dc626f836 pinctrl: uniphier: add UniPhier pinctrl core support
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>
2015-09-23 23:21:32 +09:00