Core and userspace API:
- The userspace API KFIFOs have been imoproved with locks that
do not block interrupts. This makes us better at getting
events to userspace without blocking or disturbing new events
arriving in the same time. This was reviewed by the KFIFO
maintainer Stefani. This is a generic improvement which
paves the road for similar improvements in other subsystems.
- We provide a new ioctl() for monitoring changes in the line
information, such as when multiple clients are taking lines
and giving them back, possibly reconfiguring them in the
process: we can now monitor that and not get stuck with stale
static information.
- An example tool 'gpio-watch' is provided to showcase this
functionality.
- Timestamps for events are switched to ktime_get_ns() which is
monotonic. We previously had a 'realtime' stamp which could
move forward and *backward* in time, which probably would just
cause silent bugs and weird behaviour. In the long run we
see two relevant timestamps: ktime_get_ns() or the timestamp
sometimes provided by the GPIO hardware itself, if that
exists.
- Device Tree overlay support for GPIO hogs. On systems that
load overlays, these overlays can now contain hogs, and will
then be respected.
- Handle pin control interaction with nonexisting pin ranges
in the GPIO library core instead of in the individual
drivers.
New drivers:
- New driver for the Mellanox BlueField 2 GPIO controller.
Driver improvements:
- Introduce the BGPIOF_NO_SET_ON_INPUT flag to the generic
MMIO GPIO library and use this flag in the MT7621 driver.
- Texas Instruments OMAP CPU power management improvements,
such as blocking of idle on pending GPIO interrupts.
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Merge tag 'gpio-v5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO updates from Linus Walleij:
"This is the bulk of GPIO development for the v5.7 kernel cycle.
Core and userspace API:
- The userspace API KFIFOs have been imoproved with locks that do not
block interrupts. This makes us better at getting events to
userspace without blocking or disturbing new events arriving in the
same time. This was reviewed by the KFIFO maintainer Stefani. This
is a generic improvement which paves the road for similar
improvements in other subsystems.
- We provide a new ioctl() for monitoring changes in the line
information, such as when multiple clients are taking lines and
giving them back, possibly reconfiguring them in the process: we
can now monitor that and not get stuck with stale static
information.
- An example tool 'gpio-watch' is provided to showcase this
functionality.
- Timestamps for events are switched to ktime_get_ns() which is
monotonic. We previously had a 'realtime' stamp which could move
forward and *backward* in time, which probably would just cause
silent bugs and weird behaviour. In the long run we see two
relevant timestamps: ktime_get_ns() or the timestamp sometimes
provided by the GPIO hardware itself, if that exists.
- Device Tree overlay support for GPIO hogs. On systems that load
overlays, these overlays can now contain hogs, and will then be
respected.
- Handle pin control interaction with nonexisting pin ranges in the
GPIO library core instead of in the individual drivers.
New drivers:
- New driver for the Mellanox BlueField 2 GPIO controller.
Driver improvements:
- Introduce the BGPIOF_NO_SET_ON_INPUT flag to the generic MMIO GPIO
library and use this flag in the MT7621 driver.
- Texas Instruments OMAP CPU power management improvements, such as
blocking of idle on pending GPIO interrupts"
* tag 'gpio-v5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (59 commits)
Revert "gpio: eic-sprd: Use devm_platform_ioremap_resource()"
pinctrl: Unconditionally assign .request()/.free()
gpio: Unconditionally assign .request()/.free()
gpio: export of_pinctrl_get to modules
pinctrl: Define of_pinctrl_get() dummy for !PINCTRL
gpio: Rename variable in core APIs
gpio: Avoid using pin ranges with !PINCTRL
gpiolib: Remove unused gpio_chip parameter from gpio_set_bias()
gpiolib: Pass gpio_desc to gpio_set_config()
gpiolib: Introduce gpiod_set_config()
tools: gpio: Fix out-of-tree build regression
gpio: gpiolib: fix a doc warning
gpio: tegra186: Add Tegra194 pin ranges for GG.0 and GG.1
gpio: tegra186: Add support for pin ranges
gpio: Support GPIO controllers without pin-ranges
ARM: integrator: impd1: Use GPIO_LOOKUP() helper macro
gpio: brcmstb: support gpio-line-names property
tools: gpio: Fix typo in gpio-utils
tools: gpio-hammer: Apply scripts/Lindent and retain good changes
gpiolib: gpio_name_to_desc: factor out !name check
...
The gpiochip_generic_request() and gpiochip_generic_free() functions can
now deal properly with chips that don't have any pin-ranges defined, so
they can be assigned unconditionally.
Suggested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20200401200527.2982450-2-thierry.reding@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In the second loop of ingenic_pinconf_set(), it annotates the switch
default case as unreachable(). The annotation is technically correct,
because that same case would have resulted in an early function return
in the previous loop.
However, the compiled code is suboptimal. GCC seems to work extra hard
to ensure that the unreachable code path triggers undefined behavior.
The function would fall through to start executing whatever function
happens to be next in the compilation unit.
This is problematic because:
a) it adds unnecessary 'ensure undefined behavior' logic, and
corresponding i-cache footprint; and
b) it's less robust -- if a bug were to be introduced, falling through
to the next function would be catastrophic.
Yet another issue is that, while objtool normally understands
unreachable() annotations, there's one special case where it doesn't:
when the annotation occurs immediately after a 'ret' instruction. That
happens to be the case here because unreachable() is immediately before
the return.
Remove the unreachable() annotation and replace it with a comment. This
simplifies the code generation and changes the unreachable error path to
just silently return instead of corrupting execution.
This fixes the following objtool warning:
drivers/pinctrl/pinctrl-ingenic.o: warning: objtool: ingenic_pinconf_set() falls through to next function ingenic_pinconf_group_set()
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/bc20fdbcb826512cf76b7dfd0972740875931b19.1582212881.git.jpoimboe@redhat.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Use newly added GPIO defines GPIO_LINE_DIRECTION_IN and
GPIO_LINE_DIRECTION_OUT instead of using hard-coded 1 and 0.
Main benefit is to make it easier to see which values mean IN and which
OUT. As a side effect this helps GPIO framework to change the direction
defines to something else if ever needed.
Please note that return value from get_direction call on
pinctrl-axp209 driver was changed. Previously pinctrl-axp209 might have
returned value 2 for direction INPUT.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reported-by: kbuild test robot <lkp@intel.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Link: https://lore.kernel.org/r/20200214135712.GA14557@localhost.localdomain
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Simplify the code of the driver's irq_set_type() function by doing some
factorization. The behaviour is unchanged.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20200106232711.559727-5-paul@crapouillou.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Until there is the need to handle the JZ4760B and X1000E differently
there is no reason to use a separate ingenic_chip_info since the data
it contains is the same than for the JZ4760 and X1000 respectively.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20200106232711.559727-4-paul@crapouillou.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Instead of passing a numeric ID as match data, and retrieve a pointer to
the ingenic_chip_info structure in an ugly succession of if/else in the
probe function, get the pointer to the ingenic_chip_info structure
directly from the match data, and store the numeric ID inside the
ingenic_chip_info structure.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20200106232711.559727-3-paul@crapouillou.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
We enforce devicetree support in the Kconfig and all Ingenic boards
without exception probe their drivers from devicetree. The code path to
probe the driver from arch code can then be considered as dead code and
removed.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20200106232711.559727-2-paul@crapouillou.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1.Add pinctrl drivers for the SPI flash controller (SFC) of
X1000 and X1500.
2.Add pinctrl driver for the synchronous serial interface (SSI)
of X1000.
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Link: https://lore.kernel.org/r/1576426864-35348-4-git-send-email-zhouyanjie@wanyeetech.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
1.Fix the pullup parameter of X1000.
2.X1000 and X1500 have only one set of uart1 hwflow pin mapping,
so modify "uart1_hwflow_d" to "uart1_hwflow".
3.X1000 has only one set of mmc1 pin mapping, so modify
"mmc1-1bit-e/mmc1-4bit-e" to "mmc1-1bit/mmc1-4bit".
4.X1000 has only one regular externel memory controller that
does not support nand flash, so change "nemc_" to "emc_".
5.X1500 has only one set of mmc, so modify "mmc0_" to "mmc_".
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Link: https://lore.kernel.org/r/1576426864-35348-3-git-send-email-zhouyanjie@wanyeetech.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
JZ4760 support was added in parallel of the previous patch so this one
slipped through. The first SoC to use the new register is the JZ4760 and
not the JZ4770, fix it here.
Fixes: 7009d046a6 ("pinctrl: ingenic: Handle PIN_CONFIG_OUTPUT config")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20191210164446.53912-1-paul@crapouillou.net
[Folded into OF dependency]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This makes the driver support the 'output-low' and 'output-high'
devicetree properties in gpio-hog sub-nodes.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20191119155211.102527-1-paul@crapouillou.net
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
We need to convert all old gpio irqchips to pass the irqchip
setup along when adding the gpio_chip. For more info see
drivers/gpio/TODO.
For chained irqchips this is a pretty straight-forward
conversion.
Cc: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Zhou Yanjie <zhouyanjie@zoho.com>
Acked-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20191001133209.17164-1-linus.walleij@linaro.org
Based on 1 normalized pattern(s):
license terms gnu general public license gpl version 2
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-only
has been chosen to replace the boilerplate/reference in 161 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528170027.447718015@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add the pins and groups for the "lcd" pin function in the JZ4725B SoC.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In the original code, some function names begin with "ingenic_gpio_",
and some with "gpio_ingenic_". For the sake of uniform style,
all of them are changed to the beginning of "ingenic_gpio_".
Signed-off-by: Zhou Yanjie <zhouyanjie@cduestc.edu.cn>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Add mmc2 for JZ4770 and JZ4780:
According to the datasheet, both JZ4770 and JZ4780 have mmc2. But this
part of the original code is missing. It is worth noting that JZ4770's
mmc2 supports 8bit mode while JZ4780's does not, so we added the
corresponding code for both models.
Add nemc-wait for JZ4770 and JZ4780:
Both JZ4770 and JZ4780 have a nemc-wait pin. But this part of the
original code is missing.
Add mac for JZ4770:
JZ4770 have a mac. But this part of the original code is missing.
Signed-off-by: Zhou Yanjie <zhouyanjie@cduestc.edu.cn>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Delete uart4 and i2c3/4 from JZ4770:
According to the datasheet, only JZ4780 have uart4 and i2c3/4. So we
remove it from the JZ4770 code and add a section corresponding the JZ4780.
Fix bugs in i2c0/1:
The pin number was wrong in the original code.
Fix bugs in uart2:
JZ4770 and JZ4780 have different uart2 pins. So the original section JZ4770
has been modified and the corresponding section of JZ4780 has been added.
Fix bugs in mmc0:
JZ4770 and JZ4780 assigned different pins to mmc0's 4~7 data lines. So the
original section JZ4770 has been modified and the corresponding section of
JZ4780 has been added.
Fix bugs in mmc1:
JZ4770's mmc1 has 8bit mode, while JZ4780 doesn't. So the original
section JZ4770 has been modified and the corresponding section of
JZ4780 has been added.
Fix bugs in nemc:
JZ4770's nemc has 16bit mode, while JZ4780 doesn't. So the original section
JZ4770 has been modified and the corresponding section of JZ4780 has been
added. And add missing cs2~5 groups for JZ4770 and JZ4780.
Fix bugs in cim:
JZ4770's cim has 12bit mode, while JZ4780 doesn't. So the original
section JZ4770 has been modified and the corresponding section of
JZ4780 has been added.
Fix bugs in lcd:
Both JZ4770 and JZ4780 lcd should be 24bit instead of 32bit.
Signed-off-by: Zhou Yanjie <zhouyanjie@cduestc.edu.cn>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Merge tag 'v4.19-rc6' into devel
This is the 4.19-rc6 release
I needed to merge this in because of extensive conflicts in
the MSM and Intel pin control drivers. I know how to resolve
them, so let's do it like this.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Commit a203728ac6 ("pinctrl: core: Return selector to the pinctrl
driver") and commit f913cfce4e ("pinctrl: pinmux: Return selector to
the pinctrl driver") modified the return values of
pinctrl_generic_add_group() and pinmux_generic_add_function()
respectively, but did so without updating their callers. This broke the
pinctrl-ingenic driver, which treats non-zero return values from these
functions as errors & fails to probe. For example on a MIPS Ci20:
pinctrl-ingenic 10010000.pin-controller: Failed to register group uart0-hwflow
pinctrl-ingenic: probe of 10010000.pin-controller failed with error 1
Without the pinctrl driver probed, other drivers go on to fail to probe
too & the system is unusable.
Fix this by modifying the error checks to treat only negative values as
errors, matching the commits that introduced the breakage & similar
changes made to other drivers.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Fixes: a203728ac6 ("pinctrl: core: Return selector to the pinctrl driver")
Fixes: f913cfce4e ("pinctrl: pinmux: Return selector to the pinctrl driver")
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Paul Cercueil <paul@crapouillou.net>
Cc: Tony Lindgren <tony@atomide.com>
Cc: linux-gpio@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is a GPIO driver so only include <linux/gpio/driver.h>
Cc: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Add support for the JZ4725B and compatible SoCs from Ingenic.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This allows to read from debugfs whether the GPIOs requested are set as
input or output.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Merge the code of the gpio-ingenic driver into the pinctrl-ingenic
driver.
The reason behind this, is that the same hardware block handles both pin
config / muxing and GPIO.
ingenic_gpio_probe() have been marked as __init, but for the most part,
the code is the exact same as what it was in the gpio-ingenic driver.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
By using platform_driver_probe() instead of platform_driver_register(),
we can mark the ingenic_pinctrl_probe() function as __init.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Using postcore_initcall() makes the driver try to initialize way too
early.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The .gpio_set_direction() callback was setting inverted direction
for SoCs older than the JZ4770, this restores the correct behaviour.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
There is a error message within devm_ioremap_resource
already, so remove the dev_err call to avoid redundant
error message.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The function ingenic_pinctrl_probe is local to the source and does
not need to be in global scope, so make it static.
Cleans up sparse warnings
symbol 'ingenic_pinctrl_probe' was not declared. Should it be static?
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
These structures are only stored in fields of a pinctrl_desc
structure (confops, pctlops, and pmxops) that are const. Make the
structures const as well.
Done with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This driver handles pin configuration and pin muxing for the
JZ4740 and JZ4780 SoCs from Ingenic.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
