This fixes a problem where sx150x_regmap_reg_width() returns 8 for the
data register (reg 0) for sx1504 where it should return 4, and return
a correct 8 for sx1505 but for the wrong reason (both chips lack the
'advanced' register). This is not a real problem, since nothing depends
on the function returning 4 or 8, and certainly not if it is returning
8 for the wrong reason. But fix this to avoid nasty surprises down the
line.
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This matches the datasheets and is less confusing since the register
has nothing to with advancing anything.
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The code assumes 8-bit or 16-bit width registers, but three of the
chips (sx1501/sx1504/sx1507) are 4-bit. So, try to handle 4-bit chips as
well, they leave the high part of each register unused.
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
the default mode of GPIO16 pin is gpio, when set EINT16 to
IRQ_TYPE_LEVEL_HIGH, no interrupt is triggered, it can be
fixed when set its default mode as usb iddig.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
It should be possible to use the GPIOLIB_IRQCHIP helper
library with the BCM2835 driver since it is a pretty straight
forward cascaded irqchip.
The only difference from other drivers is that the BCM2835
has several banks for a single gpiochip, and each bank has
a separate IRQ line. Instead of creating one gpiochip per
bank, a single gpiochip covers all banks GPIO lines. This
makes it necessary to resolve the bank ID in the IRQ
handler.
The GPIOLIB_IRQCHIP allows several IRQs to be cascaded off
the same gpiochip by calling gpiochip_set_chained_irqchip()
repeatedly, but we have been a bit short on examples
for how this should be handled in practice, so this is intended
as an example of how this can be achieved.
The old code did not model the chip as a chained interrupt
handler, but this patch also rectifies that situation.
Cc: Stephen Warren <swarren@wwwdotorg.org>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Tested-by: Eric Anholt <eric@anholt.net>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This adds a new driver for pinconf on TI DA850/OMAP-L138/AM18XX. These
SoCs have a separate controller for controlling pullup/pulldown groups.
Signed-off-by: David Lechner <david@lechnology.com>
Reviewed-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
We switch the default handler to be handle_bad_irq() instead of
handle_simple_irq() (which was not correct anyway).
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
All other registers on these chips are 8-bit, but reg_sense is 16-bits
and therefore needs to be moved down one notch.
This was apparently overlooked in the conversion to regmap, which only
updated the register locations for the 16-bit chips.
Fixes: 6489677f86 ("pinctrl-sx150x: Replace sx150x_*_cfg by means of regmap API")
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
If the chip does not have an oscio pin, all pins are configured in
the same regmap register making it trivial to update all pins at
once, so do that. If an oscio pin is present, there needs to be
more locking in place to handle all cases correctly, so this is
skipped.
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Use builtin_platform_driver() helper to simplify the code.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Use builtin_platform_driver() helper to simplify the code.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Smatch complains that we dereference "map" before testing it for NULL
which is true. We should be testing "*map" instead. Also on the error
path, we should free *map and set it to NULL.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
We should return -ENOMEM instead of success if pcs_add_function() fails.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
gcc warns about a way that it could use an uninitialized variable:
drivers/pinctrl/sunxi/pinctrl-sunxi.c: In function 'sunxi_pinctrl_init':
drivers/pinctrl/sunxi/pinctrl-sunxi.c:1191:8: error: 'best_div' may be used uninitialized in this function [-Werror=maybe-uninitialized]
This cannot really happen except if 'freq' is UINT_MAX and 'clock' is
zero, and both of these are forbidden. To shut up the warning anyway,
this changes the logic to initialize the return code to the first
divider value before looking at the others.
Fixes: 7c926492d3 ("pinctrl: sunxi: Add support for interrupt debouncing")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
- DU and EtherAVB pin groups for R-Car M3-W,
- Bias handling cleanups and bug fixes,
- Drive-strength for non-GPIO pins for R-Car H3,
- EtherAVB MDIO & MII, and QSPI pin groups for R-Car H3.
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Merge tag 'sh-pfc-for-v4.10-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into devel
pinctrl: sh-pfc: Updates for v4.10 (take two)
- DU and EtherAVB pin groups for R-Car M3-W,
- Bias handling cleanups and bug fixes,
- Drive-strength for non-GPIO pins for R-Car H3,
- EtherAVB MDIO & MII, and QSPI pin groups for R-Car H3.
This add pinctrl support for Rockchip RK1108 Soc.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Series-changes: 2
- add pull and drive-strength functionality
Series-changes: 3
- two minor CodingStyle fixes adviced by Heiko
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Group the QSPI0 and QSPI1 pins into similar groups found in other sh-pfc
drivers. The pins can not be muxed between functions other than QSPI,
but their drive strength can be controlled.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Group the AVB pins into similar groups found in other sh-pfc drivers.
The pins can not be muxed between functions other then AVB but their
drive strength can be controlled.
The group avb_mdc containing ADV_MDC and ADV_MDIO are on other SoCs
called avb_mdio. In pfc-r8a7795 the avb_mdc group already existed and
is in use in DT. Therefore add the ADV_MDIO pin to the existing group
instead of renaming it.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
There are pins on the r8a7795 which are not part of a GPIO bank nor
can be muxed between different functions. They do however allow for the
drive-strength to be configured. Add those pins to the list of pins and
to the drive-strength configuration registers.
The pins can now be referred to in DT by function names and their
drive-strength modified.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Pins not associated with a GPIO port can still have other configuration
parameters. Add a new macro SH_PFC_PIN_NAMED_CFG which allows for named
pins to be declared with a set of configurations. The new macro is an
modification of SH_PFC_PIN_NAMED to allow for optional configuration to
be assigned.
The flag SH_PFC_PIN_CFG_NO_GPIO is still enforced as this should only be
used to define pins not associated with a GPIO port.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Change the data structure and use the generic sh_pfc_pin_to_bias_info()
function to get the register offset and bit information.
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
There is a bug in the r8a7795 bias code where a WARN() is trigged
anytime a pin from PUEN0/PUD0 is accessed.
# cat /sys/kernel/debug/pinctrl/e6060000.pfc/pinconf-pins
WARNING: CPU: 2 PID: 2391 at drivers/pinctrl/sh-pfc/pfc-r8a7795.c:5364 r8a7795_pinmux_get_bias+0xbc/0xc8
[..]
Call trace:
[<ffff0000083c442c>] r8a7795_pinmux_get_bias+0xbc/0xc8
[<ffff0000083c37f4>] sh_pfc_pinconf_get+0x194/0x270
[<ffff0000083b0768>] pin_config_get_for_pin+0x20/0x30
[<ffff0000083b11e8>] pinconf_generic_dump_one+0x168/0x188
[<ffff0000083b144c>] pinconf_generic_dump_pins+0x5c/0x98
[<ffff0000083b0628>] pinconf_pins_show+0xc8/0x128
[<ffff0000081fe3bc>] seq_read+0x16c/0x420
[<ffff00000831a110>] full_proxy_read+0x58/0x88
[<ffff0000081d7ad4>] __vfs_read+0x1c/0xf8
[<ffff0000081d8874>] vfs_read+0x84/0x148
[<ffff0000081d9d64>] SyS_read+0x44/0xa0
[<ffff000008082f4c>] __sys_trace_return+0x0/0x4
This is due to the WARN() check if the reg field of the pullups struct
is zero, and this should be 0 for pins controlled by the PUEN0/PUD0
registers since PU0 is defined as 0. Change the data structure and use
the generic sh_pfc_pin_to_bias_info() function to get the register
offset and bit information.
Fixes: 560655247b ("pinctrl: sh-pfc: r8a7795: Add bias pinconf support")
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The last else statement is missing braces, and the indentation level can
be reduced.
Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
On some SoC there are no simple mapping of pins to bias register bits
and a lookup table is needed. This logic is already implemented in some
SoC specific drivers that could benefit from a generic implementation.
Add helpers to deal with the lookup which later can be used by the SoC
specific drivers. The logic used to lookup are different from the one it
aims to replace, this is intentional. This new method reduces the memory
consumption at the cost of increased CPU usage and fix a bug where a
WARN() would incorrectly be triggered if the register offset is 0.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Always stating PIN_CONFIG_BIAS_DISABLE is supported gives untrue output
when examining /sys/kernel/debug/pinctrl/e6060000.pfc/pinconf-pins if
the operation get_bias() is implemented but the pin is not handled by
the get_bias() implementation. In that case the output will state that
"input bias disabled" indicating that this pin has bias control
support.
Make support for PIN_CONFIG_BIAS_DISABLE depend on that the pin either
supports SH_PFC_PIN_CFG_PULL_UP or SH_PFC_PIN_CFG_PULL_DOWN. This also
solves the issue where SoC specific implementations print error messages
if their particular implementation of {set,get}_bias() is called with a
pin it does not know about.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Only the DU parallel RGB output signals are included, HDMI and TCON pins
will be added in separate groups. Based on a similar patch from Laurent
Pinchart for the r8a7795 PFC driver.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The pin controller found in the Allwinner SoCs has support for interrupts
debouncing.
However, this is not done per-pin, preventing us from using the generic
pinconf binding for that, but per irq bank, which, depending on the SoC,
ranges from one to five.
Introduce a device-wide property to deal with this using a microsecond
resolution. We can re-use the per-pin input-debounce property for that, so
let's do it!
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The sunxi_pconf_reg helper introduced in the last patch gives us the
chance to rework sunxi_pconf_group_set to have it match the structure
of sunxi_pconf_(group_)get and make it easier to understand.
For each config to set, it:
1. checks if the parameter is supported.
2. checks if the argument is within limits.
3. converts argument to the register value.
4. writes to the register with spinlock held.
As a result the function now blocks unsupported config parameters,
instead of silently ignoring them.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The sunxi pinctrl driver only caches whatever pinconf setting was last
set on a given pingroup. This is not particularly helpful, nor is it
correct.
Fix this by actually reading the hardware registers and returning
the correct results or error codes. Also filter out unsupported
pinconf settings. Since this driver has a peculiar setup of 1 pin
per group, we can support both pin and pingroup pinconf setting
read back with the same code. The sunxi_pconf_reg helper and code
structure is inspired by pinctrl-msm.
With this done we can also claim to support generic pinconf, by
setting .is_generic = true in pinconf_ops.
Also remove the cached config value. The behavior of this was never
correct, as it only cached 1 setting instead of all of them. Since
we can now read back settings directly from the hardware, it is no
longer required.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
According to pinconf-generic.h, the argument for
PIN_CONFIG_BIAS_PULL_{DOWN,UP} is non-zero if the bias is enabled
with a pull up/down resistor, zero if it is directly connected
to VDD or ground.
Since Allwinner hardware uses a weak pull resistor internally,
the argument should be 1.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
In the recently refactored sunxi pinctrl library, we are only allocating
one set of pin configs for each pinmux setting node. When the pinctrl_map
structure is freed, the pin configs should also be freed. However the
code assumed the first map would contain the configs, which actually
never happens, as the mux function map gets added first.
The proper way to do this is to look through all the maps and free the
first one whose type is actually PIN_MAP_TYPE_CONFIGS_GROUP.
Also slightly expand the comment explaining this.
Fixes: f233dbca62 ("pinctrl: sunxi: Rework the pin config building code")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
None of the Kconfigs for any of these drivers are tristate, meaning
that they currently are not being built as a module by anyone.
Lets remove the modular code that is essentially orphaned, so that
when reading the drivers there is no doubt they are builtin-only. All
drivers get the exact same change, so they are handled in batch.
Changes are (1) use builtin_platform_driver, (2) use init.h header
(3) delete module_exit related code, (4) delete MODULE_DEVICE_TABLE,
(5) delete MODULE_LICENCE/MODULE_AUTHOR and associated tags and (6)
drop ".remove" code and prevent sysfs unbind attempts to call ".remove".
Once this is done, the shared remove function in wmt.[ch] is no longer
used and hence it is removed as well.
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 etc. tags since all that information
is already contained at the top of each file in the comments.
Cc: Tony Prisk <linux@prisktech.co.nz>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This patch add the support of GPF[1-5] pin of Exynos5433 SoC. The GPFx need
to support the multiple memory map because the registers of GPFx are located
in the different domain.
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: linux-gpio@vger.kernel.org
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This patch supports the multiple IORESOURCE_MEM resources for one pin-bank.
In the pre-existing Exynos series, the registers of the gpio bank are included
in the one memory map. But, some gpio bank need to support the one more memory
map (IORESOURCE_MEM) because the registers of gpio bank are separated into
the different memory map.
For example,
The both ALIVE and IMEM domain have the different memory base address.
The GFP[1-5] of exynos5433 are composed as following:
- ALIVE domain : WEINT_* registers
- IMEM domain : CON/DAT/PUD/DRV/CONPDN/PUDPDN register
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Kukjin Kim <kgene@kernel.org>
Cc: linux-gpio@vger.kernel.org
Suggested-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
When dynamically unloading overlays, it is important that freed pins are
restored to being inputs to prevent functions from being enabled in
multiple places at once.
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Contrary to the documentation, the BCM2835 GPIO controller actually
has four interrupt lines - one each for the three IRQ groups and one
common. Confusingly, the GPIO interrupt groups don't correspond
directly with the GPIO control banks. Instead, GPIOs 0-27 generate IRQ
GPIO0, 28-45 IRQ GPIO1 and 46-53 IRQ GPIO2.
Awkwardly, the GPIOs for IRQ GPIO1 straddle two 32-entry GPIO banks,
so split out a function to process the interrupts for a single GPIO
bank.
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The pcs_parse_bits_in_pinctrl_entry function should search
for the "pinctrl-single,bits" and not "pinctrl-single,pins"
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
pinctrl_count_index_with_args returns -ENOENT not
-EINVAL. The return check would pass, and we would
try to kzalloc with a negative error size throwing
a warning.
Instead of checking for -EINVAL specifically, lets
check for any error and avoid negative size allocations.
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
for_each_property_of_node(pins, pp) checks that pp is not NULL.
So there is no need to check it inside the loop.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
function is defined as unsigned int.
So we need %u to print it.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
- I2C and DRIF pin groups for R-Car M3-W,
- Bug fixes for SDHI2/3 on R-Car M3-W.
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Merge tag 'sh-pfc-for-v4.10-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into devel
pinctrl: sh-pfc: Updates for v4.10
- I2C and DRIF pin groups for R-Car M3-W,
- Bug fixes for SDHI2/3 on R-Car M3-W.
Include <linux/gpio/driver.h> rather than <linux/gpio.h>
Drop <linux/pinctrl/machine.h>.
Cc: Andrey Smirnov <andrew.smirnov@gmail.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
