When `CONFIG_DEBUG_FS` is disabled, nmk_gpio_dbg_show_one() is an
empty dummy function; this however triggers a `-Wmissing-prototypes`
warning and later a linker error because the function is also used by
drivers/pinctrl/nomadik/pinctrl-nomadik.c, therefore it needs to be
non-static.
To allow both sources to access this dummy function, this patch moves
it to the header, adding the `#ifdef CONFIG_DEBUG_FS` there as well.
Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
Link: https://lore.kernel.org/r/20240311133223.3429428-1-max.kellermann@ionos.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Using BUG_ON() is discouraged and also the check wasn't done early
enough to prevent an out of bounds access. Check earlier and return
an error instead of calling BUG().
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/ae643df0-3a3e-4270-8dbf-be390ee4b478@moroto.mountain
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Use compatible name "qcom,sm4450-tlmm" instead of "qcom,sm4450-pinctrl"
to match the compatible name in sm4450 pinctrl driver.
Fixes: 7bf8b78f86db ("dt-bindings: pinctrl: qcom: Add SM4450 pinctrl")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Tengfei Fan <quic_tengfan@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240129092512.23602-2-quic_tengfan@quicinc.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The AW9523 driver fails to build in some allmod configs since the
I2C core can be a module, but AW9523 can not. Fix it up by allowing
AW9523 to be a module (tristate).
Fixes: 576623d70661 ("pinctrl: Add driver for Awinic AW9523/B I2C GPIO Expander")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202403050916.KBtE6eEj-lkp@intel.com/
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240305-fix-aw9523-v2-1-2dc50bab2b17@linaro.org
Several commits introduce managed resources (devm_*) into the
nmk_gpio_populate_chip() function.
This isn't always working because when called from the Nomadik pin
control driver we just want to populate some states for the device as
the same states are used by the pin control driver.
Some managed resources such as devm_kzalloc() etc will work, as the
passed in platform device will be used for lifecycle management,
but in some cases where we used the looked-up platform device
for the GPIO block, this will cause problems for the combined
pin control and GPIO driver, because it adds managed resources
to the GPIO device before it is probed, which is something that
the device core will not accept, and all of the GPIO blocks will
refuse to probe:
platform 8012e000.gpio: Resources present before probing
platform 8012e080.gpio: Resources present before probing
(...)
Fix this by not tying any managed resources to the looked-up
gpio_pdev/gpio_dev device, let's just live with the fact that
these need imperative resource management for now.
Drop in some notes and use a local *dev variable to clarify the
code.
Cc: Théo Lebrun <theo.lebrun@bootlin.com>
Fixes: 12410e95903c ("gpio: nomadik: use devm_platform_ioremap_resource() helper")
Link: https://lore.kernel.org/r/20240305-fix-nomadik-gpio-v2-1-e5d1fbdc3f5c@linaro.org
[Fixed some last minut print formatting]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
EPROBE_DEFER error returns are not really critical, since they cancel
the probe process, but the kernel will return later and retry.
However, depending on the probe order, this might issue quite some
verbatim and scary, though pointless messages:
[ 2.388731] 300b000.pinctrl: pin-224 (5000000.serial) status -517
[ 2.397321] 300b000.pinctrl: could not request pin 224 (PH0) from group PH0 on device 300b000.pinctrl
Replace dev_err() with dev_err_probe(), which not only drops the
priority of the message from error to debug, but also puts some text
into debugfs' devices_deferred file, for later reference.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Link: https://lore.kernel.org/r/20240305143859.2449147-1-andre.przywara@arm.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The Awinic AW9523(B) is a multi-function I2C gpio expander in a
TQFN-24L package, featuring PWM (max 37mA per pin, or total max
power 3.2Watts) for LED driving capability.
It has two ports with 8 pins per port (for a total of 16 pins),
configurable as either PWM with 1/256 stepping or GPIO input/output,
1.8V logic input; each GPIO can be configured as input or output
independently from each other.
This IC also has an internal interrupt controller, which is capable
of generating an interrupt for each GPIO, depending on the
configuration, and will raise an interrupt on the INTN pin to
advertise this to an external interrupt controller.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: David Bauer <mail@david-bauer.net>
Link: https://lore.kernel.org/r/20210624214458.68716-2-mail@david-bauer.net
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240301-awinic-aw9523-v8-1-7ec572f5dfb4@linaro.org
Add bindings for the Awinic AW9523/AW9523B I2C GPIO Expander driver.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: David Bauer <mail@david-bauer.net>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210624214458.68716-1-mail@david-bauer.net
[Fixed up minor bugs found by new checking tools]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Previously driver got a few updates in order to replace OF APIs by
respective firmware node, however it was not finished to the logical
end, e.g., some APIs that has been used are still require OF node
to be passed. Finish that job by converting leftovers to use firmware
node APIs.
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20240302173401.217830-1-andy.shevchenko@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Add OF table as per the binding so that driver get instantiated and
bind automatically when the driver is built as a module.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20240226191607.397386-1-biju.das.jz@bp.renesas.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The variable ret is being assigned a value that is never read, it
is being re-assigned a value in every case statement in the following
switch statement. The assignment is redundant and can be removed.
Cleans up clang scan build warning:
drivers/pinctrl/pinctrl-ocelot.c:1404:3: warning: Value stored to 'ret'
is never read [deadcode.DeadStores]
Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20240223162850.3914349-1-colin.i.king@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Fetch a reference to the optional shared reset control and deassert it
if it exists.
Optional because not all platforms that use this driver have a reset
attached to the reset block. Shared because some platforms that use the
reset (at least Mobileye EyeQ5) share the reset across banks.
Do not keep a reference to the reset control as it is not needed
afterwards; the driver does not handle suspend, does not use runtime
PM, does not register a remove callback and does not support unbinding
from sysfs (made explicit with suppress_bind_attrs).
The operation is done in nmk_gpio_populate_chip(). This function is
called by either gpio-nomadik or pinctrl-nomadik, whoever comes first.
This is here for historic reasons and could probably be removed now; it
seems gpio-ranges enforces the ordering to be pinctrl-first. It is not
the topic of the present patch however.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-25-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
We create a custom compatible for the STA2X11 IP block as integrated
into the Mobileye EyeQ5 platform. Its wake and alternate functions have
been disabled, we want to avoid touching those registers.
We both do: (1) early return in functions that do not support the
platform, but with warnings, and (2) avoid calling those functions in
the first place.
We ensure that pinctrl-nomadik is not used with this STA2X11 variant.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-24-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Read the "ngpios" property to determine the number of GPIOs for a bank.
If not available, fallback to NMK_GPIO_PER_CHIP ie 32 ie the current
behavior.
The IP block always supports 32 GPIOs, but platforms can expose a lesser
amount. The Mobileye EyeQ5 is in this case; one bank is 29 GPIOs and
the other is 23.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-23-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Support a single IRQs used by multiple GPIO banks. Change the IRQ
handler type from a chained handler (as used by gpiolib
for ->parent_handler) to a threaded IRQ.
Use the generic_handle_domain_irq_safe() helper. The non-safe version
must be called in a no-IRQ context.
The Mobileye EyeQ5 platform uses this GPIO controller and share an IRQ
for its two banks.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-22-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This GPIO driver is historically related to the Nomadik platform. It
however can be used by others as it implements the ST STA2X11 IP block.
Pick a less ambiguous name for it.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-21-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Not all platforms using this platform driver expose a clock for this
GPIO controller. Turn devm_clk_get() into devm_clk_get_optional() to
avoid failing when no clocks are provided.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-20-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Move away from statically allocated GPIO IDs. Switch to dynamic ID
allocation. Static IDs are deprecated because they cause issues when
multiple GPIO controllers are to be found on the same platform.
Add a bit of complexity to do pin number -> GPIO chip + offset.
Previously, bank number and offsets were retrieved using division and
remainder (bank size being constant 32). Now, to get the pin number
matching a bank base, we must know the sum of ngpios of previous banks.
This is done in find_nmk_gpio_from_pin() which also exposes the offset
inside the bank.
Also remove the assumption that bank sizes are constant. Instead of
using NMK_GPIO_PER_CHIP as bank size, use nmk_gpio_chips[i]->ngpio.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-19-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Replace call to clk_get() by call to devm_clk_get(). Allow automatic
cleanup of the clock in case of probe error.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-18-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Replace calls to platform_get_resource() then devm_ioremap_resource() by
a single call to devm_platform_ioremap_resource().
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-17-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Avoid OF APIs in the GPIO subsystem. Here, replace
of_find_device_by_node() call by bus_find_device_by_of_node().
The new helper returns a struct device pointer. Store it in a new local
variable and use it down the road.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-15-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Fix strict checkpatch warnings relative to if-else blocks and bool
expressions. Message types addressed:
CHECK: Comparison to NULL could be written "!nmk_cfg_params[index].choice"
CHECK: Unbalanced braces around else statement
CHECK: Using comparison to false is error prone
CHECK: Using comparison to true is error prone
CHECK: braces {} should be used on all arms of this statement
Before: 0 errors, 1 warnings, 16 checks.
After: 0 errors, 1 warnings, 7 checks.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-13-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
nmk_pinctrl_probe() iterates over each GPIO block. Use an early
conditional continue to skip to the next iteration rather than indent
all the loop code block.
Do not change code logic. The block is changed from:
for (i = 0; i < NMK_MAX_BANKS; i++) {
x = of_parse_phandle(...);
if (x) {
... do work ...
}
}
To:
for (i = 0; i < NMK_MAX_BANKS; i++) {
x = of_parse_phandle(...);
if (!x)
continue;
... do work ...
}
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-10-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Fix compiler warning found in the pinctrl-nomadik platform driver. GCC
message is as such:
drivers/pinctrl/nomadik/pinctrl-nomadik.c:1169:12: warning: cast from
pointer to integer of different size [-Wpointer-to-int-cast]
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-9-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Fix compiler warning found in the pinctrl-nomadik platform driver. GCC
message is as such:
drivers/pinctrl/nomadik/pinctrl-nomadik.c:855:21: warning:
format ‘%u’ expects argument of type ‘unsigned int’, but argument 5
has type ‘size_t {aka const long unsigned int}’ [-Wformat=]
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-8-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
PINCTRL_NOMADIK, PINCTRL_STN8815 and PINCTRL_DB8500 depend on ARCH_U8500
or ARCH_NOMADIK. Add COMPILE_TEST as an option to allow test building
the driver.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-7-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Previously, drivers/pinctrl/nomadik/pinctrl-nomadik.c registered two
platform drivers: pinctrl & GPIO. Move the GPIO aspect to the
drivers/gpio/ folder, as would be expected.
Both drivers are intertwined for a reason; pinctrl requires access to
GPIO registers for pinmuxing, pull-disable, disabling interrupts while
setting the muxing and wakeup control. Information sharing is done
through a shared array containing GPIO chips and a few helper
functions. That shared array is not touched from gpio-nomadik when
CONFIG_PINCTRL_NOMADIK is not defined.
Make no change to the code that moved into gpio-nomadik; there should be
no behavior change following. A few functions are shared and header
comments are added. Checkpatch warnings are addressed. NUM_BANKS is
renamed to NMK_MAX_BANKS.
It is supported to compile gpio-nomadik without pinctrl-nomadik. The
opposite is not true.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-6-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Previously, the statement looked like:
slpm[x] &= ~BIT(g->grp.pins[i]);
Where:
- slpm is a unsigned int pointer;
- g->grp.pins[i] is a pin number. It can grow to more than 32.
The expected shift amount is a pin bank offset.
This bug does not occur on every group or pin: the altsetting must be
NMK_GPIO_ALT_C and the pin must be 32 or above. It might have occured.
For example, in pinctrl-nomadik-db8500.c, pin group i2c3_c_2 has the
right altsetting and pins 229 and 230.
Fixes: dbfe8ca259e1 ("pinctrl/nomadik: implement pin multiplexing")
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-5-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This GPIO controller is used on the Mobileye EyeQ5 SoC. Add its
compatible to the dt-bindings. One difference is that the block as
integrated on EyeQ5 does not support sleep-mode.
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-3-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This GPIO controller can support a lesser number of GPIOs than 32.
Express that in devicetree using an optional, generic property.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-2-3ba757474006@bootlin.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Create gpio/st,nomadik-gpio.yaml json-schema dt-bindings file as a
direct translation from gpio-nmk.txt. Remove the txt file.
Add clocks and gpio-ranges properties which were missing and are being
used in Nomadik devicetrees.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240228-mbly-gpio-v2-1-3ba757474006@bootlin.com
[Dropped an unused label]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
- Add support for the R-Car V4M (R8A779H0) SoC,
- Add support for suspend/resume on the RZ/G2L family,
- Miscellaneous fixes and improvements.
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Merge tag 'renesas-pinctrl-for-v6.9-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into devel
pinctrl: renesas: Updates for v6.9 (take two)
- Add support for the R-Car V4M (R8A779H0) SoC,
- Add support for suspend/resume on the RZ/G2L family,
- Miscellaneous fixes and improvements.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
The conversion to DEFINE_NOIRQ_DEV_PM_OPS() lost the ability of the
compiler to optimize away the struct dev_pm_ops object when it is not
needed.
Fix this by replacing the use of pm_sleep_ptr() by a custom wrapper.
Fixes: 727eb02eb753375e ("pinctrl: renesas: Switch to use DEFINE_NOIRQ_DEV_PM_OPS() helper")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/6238a78e32fa21f0c795406b6cba7bce7af92577.1708513940.git.geert+renesas@glider.be
pinctrl-rzg2l driver is used on RZ/G3S which support deep sleep states
where power to most of the SoC components is turned off.
For this add suspend/resume support. This involves saving and restoring
configured registers along with disabling clock in case there is no pin
configured as wakeup sources.
To save/restore registers 2 caches were allocated: one for GPIO pins and
one for dedicated pins.
On suspend path the pin controller registers are saved and if none of the
pins are configured as wakeup sources the pinctrl clock is disabled.
Otherwise it remains on.
On resume path the configuration is done as follows:
1/ setup PFCs by writing to registers on pin based accesses
2/ setup GPIOs by writing to registers on port based accesses and
following configuration steps specified in hardware manual
3/ setup dedicated pins by writing to registers on port based accesses
4/ setup interrupts.
Because interrupt signals are routed to IA55 interrupt controller and
IA55 interrupt controller resumes before pin controller, patch restores
also the configured interrupts just after pin settings are restored to
avoid invalid interrupts while resuming.
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240215124112.2259103-3-claudiu.beznea.uj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The pinctrl-rzg2l driver accesses gpio_chip.irq, which is available only
if CONFIG_GPIOLIB_IRQCHIP=y, and uses APIs that are defined only if
CONFIG_IRQ_DOMAIN_HIERARCHY=y (irq_chip_*_parent() APIs).
On ARCH_RZG2L, CONFIG_IRQ_DOMAIN_HIERARCHY is selected anyway, e.g. by
CONFIG_ARM_GIC_V3, but CONFIG_GPIOLIB_IRQCHIP is not (it is on R-Car).
Make this explicit at the driver level for a clearer view of the
dependencies.
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240215124112.2259103-2-claudiu.beznea.uj@bp.renesas.com
[geert: select GPIOLIB_IRQCHIP, too]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Currently on irq_disable(), we are disabling gpio interrupt enable(ISEL).
That means the pin is just gpio input and not gpio input interrupt any
more. So, move configuring ISEL in rzg2l_gpio_child_to_parent_hwirq()/
rzg2l_gpio_irq_domain_free() so that the pin will be gpioint always even
during irq_disable().
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240206135318.165426-1-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
