pinctrl: zynq: use module_platform_driver to simplify the code

module_platform_driver() makes the code simpler by eliminating
boilerplate code.

Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
Link: https://lore.kernel.org/r/20220224043605.26157-1-srinivas.neeli@xilinx.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: pinctrl-zynq: Add support for 'power-source' parameter

Add support for generic pin parameter 'power-source'.
To maintain the backward compatibility, 'io-standard' parameter is still
supported in the driver.

Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
Link: https://lore.kernel.org/r/1626868353-96475-4-git-send-email-lakshmi.sai.krishna.potthuri@xilinx.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: Introduce MODE group in enum pin_config_param

Better to have a MODE group of settings to keep them together
when ordered alphabetically. Hence, rename PIN_CONFIG_LOW_POWER_MODE
to PIN_CONFIG_MODE_LOW_POWER.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210412140741.39946-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13

Based on 2 normalized pattern(s):

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details you
should have received a copy of the gnu general public license along
with this program if not see http www gnu org licenses

this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version this program is distributed in the
hope that it will be useful but without any warranty without even
the implied warranty of merchantability or fitness for a particular
purpose see the gnu general public license for more details [based]
[from] [clk] [highbank] [c] you should have received a copy of the
gnu general public license along with this program if not see http
www gnu org licenses

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 355 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190519154041.837383322@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

pinctrl: zynq: Use define directive for PIN_CONFIG_IO_STANDARD

Clang warns when one enumerated type is implicitly converted to another:

drivers/pinctrl/pinctrl-zynq.c:985:18: warning: implicit conversion from
enumeration type 'enum zynq_pin_config_param' to different enumeration
type 'enum pin_config_param' [-Wenum-conversion]
{"io-standard", PIN_CONFIG_IOSTANDARD, zynq_iostd_lvcmos18},
~ ^~~~~~~~~~~~~~~~~~~~~
drivers/pinctrl/pinctrl-zynq.c:990:16: warning: implicit conversion from
enumeration type 'enum zynq_pin_config_param' to different enumeration
type 'enum pin_config_param' [-Wenum-conversion]
= { PCONFDUMP(PIN_CONFIG_IOSTANDARD, "IO-standard", NULL, true),
~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/pinctrl/pinconf-generic.h:163:11: note: expanded from
macro 'PCONFDUMP'
.param = a, .display = b, .format = c, .has_arg = d \
^
2 warnings generated.

It is expected that pinctrl drivers can extend pin_config_param because
of the gap between PIN_CONFIG_END and PIN_CONFIG_MAX so this conversion
isn't an issue. Most drivers that take advantage of this define the
PIN_CONFIG variables as constants, rather than enumerated values. Do the
same thing here so that Clang no longer warns.

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: Fix warnings in the driver

This patch fixes the below warning
--> Prefer 'unsigned int' to bare use of 'unsigned'.
--> line over 80 characters.
--> Prefer 'unsigned int **' to bare use of 'unsigned **'.

Signed-off-by: Nava kishore Manne <navam@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: Fix kernel doc warnings

This patch fixes the kernel doc warnings in the driver.

Signed-off-by: Nava kishore Manne <navam@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: Add a 8 bit wide nand option

The hardware supports a 16 and 8 bit wide NAND bus, let users pick
either.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: fix typo in sdio1_3_grp pin list

It contains pin 50 instead of pin 40.

Signed-off-by: Daniel Glöckner <dg@emlix.com>
Reviewed-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: make it explicitly non-modular

The Kconfig currently controlling compilation of this code is:

config PINCTRL_ZYNQ
bool "Pinctrl driver for Xilinx Zynq"

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

Since module_platform_driver() uses the same init level priority as
builtin_platform_driver() the init ordering remains unchanged with
this commit.

Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

We also delete the MODULE_LICENSE tag etc. since all that information
is already contained at the top of the file in the comments.

Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Sören Brinkmann" <soren.brinkmann@xilinx.com>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: Use devm_pinctrl_register() for pinctrl registration

Use devm_pinctrl_register() for pin control registration and
remove the need of .remove callback.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
Cc: linux-gpio@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map

Rename pinctrl_utils_dt_free_map to pinctrl_utils_free_map, since
it does not depend on device tree despite the current name. This
will enforce a consistent naming in pinctr-utils.c and will make
it clear it can be called from outside device tree (e.g. from
ACPI handling code).

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: fix typo in group name for qspi1

Due to a typo Zynq pin controller does not set pin function of qspi1
when using function qspi1. So pin group for qspi1 has to be renamed to
"qspi1_0_grp" as outlined in the corresponding bindings documentation.

This also removes kernel message:
zynq-pinctrl 700.pinctrl: invalid group "qspi1_0_grp" for function "qspi1"

Signed-off-by: Helmut Buchsbaum <helmut.buchsbaum@gmail.com>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: fix UTF-8 errors

Fix up Sören's name in the Zynq driver. I caused this. I fix it.

Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: Initialize early

Supplying pinmux configuration for e.g. gpio pins leads to deferred
probes because the pinctrl device is probed much later than gpio.
Move the init call to a much earlier stage so it probes before the
devices that may need it.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Tested-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: Fix typos in smc0_nand_grp and smc0_nor_grp

Group names should be smc0_nand_grp and smc0_nor_grp, otherwise you'll
get errors like this if you try to pinmux them via the devicetree:
zynq-pinctrl 700.pinctrl: invalid group "smc0_nand_grp" for function "smc0_nand"

Probably a typo while creating these tables.

Signed-off-by: Mike Looijmans <mike.looijmans@topic.nl>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: Moritz Fischer <moritz.fischer@ettus.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: make pinctrl_register() return proper error code

Currently, pinctrl_register() just returns NULL on error, so the
callers can not know the exact reason of the failure.

Some of the pinctrl drivers return -EINVAL, some -ENODEV, and some
-ENOMEM on error of pinctrl_register(), although the error code
might be different from the real cause of the error.

This commit reworks pinctrl_register() to return the appropriate
error code and modifies all of the pinctrl drivers to use IS_ERR()
for the error checking and PTR_ERR() for getting the error code.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Lee Jones <lee@kernel.org>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Ray Jui <rjui@broadcom.com>
Acked-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Acked-by: Wei Chen <Wei.Chen@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: add static const to zynq_pctrl_groups

This array is only referenced in this file and never updated.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: add static to zynq_pins

This array is only referenced in this file.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: fix offset address for {SD0,SD1}_WP_CD_SEL

The address for SD0_WP_CD_SEL, SD1_WP_CD_SEL is 0xf8000830,
0xf8000834, respectively.

Each offset address must be prefixed with 0x.

Fixes: add958cee967 "pinctrl: Add driver for Zynq"
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: fix DEFINE_ZYNQ_PINMUX_FUNCTION_MUX macro

The offset to the mux register is missing.

Fixes: add958cee967 "pinctrl: Add driver for Zynq"
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: add static to platform_driver remove callback

This function is only referenced in this file.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: configure SPI SSx pins separately

Since SCLK, MISO and MOSI are the only mandatory signals at Zynq's SPI
interfaces, SS0, SS1 and SS2 have to be configured separately as they may
be used as simple GPIO lines.

This, of course, has to be considered in the devicetree, so pin controller
configuration for e.g. an SPI0 using SS0 and SS1 only might look like the
following snippet (derived from the example of chapter "17.5.3
MIO/EMIO" Routing of Zynq-7000 TRM UG585). So MIO20 can now be used
as GPIO instead of being occupied by SPI0 SS2 function. Note the separate
pinmux function for the slave select signals:

pinctrl_spi0_default: spi0-default {
mux_spi {
function = "spi0";
groups = "spi0_0_grp";
};

mux_ss {
function = "spi0_ss";
groups = "spi0_0_ss0_grp", "spi0_0_ss1_grp";
}

conf-output {
pins = "MIO16", "MIO21";
slew-rate = <0>;
bias-disable;
low-power-disable;
io-standard = <1>;
};

conf-input {
pins = "MIO17";
slew-rate = <0>;
bias-high-impedance;
low-power-disable;
io-standard = <1>;
};

conf-select {
pins = "MIO18", "MIO19";
slew-rate = <0>;
bias-pull-up;
low-power-disable;
io-standard = <1>;
};
};

pinctrl_gpio0_default {
mux {
function = "gpio0";
groups = "gpio0_20_grp"
};

conf {
pins = "MIO20";
slew-rate = <0>;
bias-pull-up;
low-power-disable;
io-standard = <1>;
};
};

Signed-off-by: Helmut Buchsbaum <helmut.buchsbaum@gmail.com>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: hide PCONFDUMP in #ifdef

The zynq and qcom-spmi pinctrl drivers both use pin_config_item arrays
to provide extra interfaces in debugfs. This structure and the
PCONFDUMP macro are not defined if CONFIG_DEBUG_FS is turned off,
so we get build errors like:

pinctrl/qcom/pinctrl-spmi-gpio.c:139:37: error: array type has incomplete element type
static const struct pin_config_item pmic_conf_items[ARRAY_SIZE(pmic_gpio_bindings)] = {
^
pinctrl/qcom/pinctrl-spmi-gpio.c:140:2: error: implicit declaration of function 'PCONFDUMP' [-Werror=implicit-function-declaration]
PCONFDUMP(PMIC_GPIO_CONF_PULL_UP, "pull up strength", NULL, true),
^
pinctrl/qcom/pinctrl-spmi-gpio.c:139:37: warning: 'pmic_conf_items' defined but not used [-Wunused-variable]
static const struct pin_config_item pmic_conf_items[ARRAY_SIZE(pmic_gpio_bindings)] = {

Lacking any better idea to solve this nicely, this patch uses #ifdef
to hide the structures, just like the pinctrl core does.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: zynq: Fix usb0 pins

Fix usb0 pin 19 -> 29 (matching ethernet1 pins and manual).
Pin 19 is used for ethernet0 on the Parallella board.

Fixes: add958cee967 ("pinctrl: Add driver for Zynq")
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: pinconf-generic: loose DT dependence

New pin controllers such as ACPI-based may also have custom properties
to parse, and should be able to use generic pin config. Let's make the
code compile on !OF systems and rename members a bit to underscore it
is custom parameters and not necessarily DT parameters.

This fixes a build regression for x86_64 on the zeroday kernel builds.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Reviewed-and-tested-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

pinctrl: Add driver for Zynq

This adds a pin-control driver for Zynq.

Changes since v2:
- driver-specific DT properties are passed to the core in two arrays,
one for the actual DT parsing one for the debugfs representation.
Issue a compiler warning when the number of entries is not the same
for both arrays.

Changes since v1:
- fix EMIO_SD1_CD pin name
- add USB to pinmux options

changes since RFCv2:
- let Zynq select PINCTRL_ZYNQ. Boot hangs when pinctrl information is
present in DT but no driver available.
- add #defines to get rid of magical constants
- add commas at end of initializers
- separate changes in mach-zynq in separate patch
- add driver specific io-standard DT property
- refactored pinconf set function to not require arguments for
argument-less properties
- squash other patches in
- support for IO-standard property
- support for low-power mode property
- migration to pinconf_generic_dt_node_to_map_all()
- use newly created infrastructure to add pass driver-specific DT
params to pinconf-generic

changes since RFC:
- use syscon/regmap to access registers in SLCR space
- rebase to 3.18: rename enable -> set_mux
- add kernel-doc
- support pinconf
- supported attributes
- pin-bias: pull up, tristate, disable
- slew-rate: 0 == slow, 1 == fast; generic pinconf does not display
argument

Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Tested-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>