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Modern device tree bindings are supposed to be created as YAML-files
in accordance with DT schema. This commit replaces Synopsys DW GPIO
legacy bare text binding with YAML file. As before the binding file
states that the corresponding dts node is supposed to be compatible
with generic DW I2C controller indicated by the "snps,dw-apb-gpio"
compatible string and to provide a mandatory registers memory range.
It may also have an optional clock and reset phandle references.
There must be specified at least one subnode with
"snps,dw-apb-gpio-port" compatible string indicating the GPIO port,
which would actually export the GPIO controller functionality. Such
nodes should have traditional GPIO controller properties together
with optional interrupt-controller attributes if the corresponding
controller was synthesized to detect and report the input values
change to the parental IRQ controller.
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200323195401.30338-2-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The sub-nodes should not be called gpio-controller, but simply gpio.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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'interrupt-parent' is often documented as part of define bindings, but
it is really outside the scope of a device binding. It's never required
in a given node as it is often inherited from a parent node. Or it can
be implicit if a parent node is an 'interrupt-controller' node. So
remove it from all the binding files.
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
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The DesignWare GPIO IP can be configured for either 1 interrupt or 1
per GPIO in port A, but the driver currently only supports 1 interrupt.
See the DesignWare DW_apb_gpio Databook description of the
'GPIO_INTR_IO' parameter.
This change allows the driver to work with up to 32 interrupts, it will
get as many interrupts as specified in the DT 'interrupts' property.
It doesn't do anything clever with the different interrupts, it just calls
the same handler used for single interrupt hardware.
ACPI companion code provided by Hoan Tran <hotran@apm.com>. This was tested
on X-Gene by Hoan.
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Hoan Tran <hotran@apm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Some platforms require reset to be released to allow register
access.
Signed-off-by: Alan Tull <atull@kernel.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
[Added DT bindings oneliner for standard reset binding]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Fix the incorrect interrupt documentation file path in binding docs.
Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
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The example uses gpio-cells = 1 while it should be two (it is even
mentioned in the text above).
Cc: devicetree@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Fix size-cells to show use of OF_GPIO_ACTIVE_LOW flag.
Signed-off-by: Alan Tull <atull@altera.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The Synopsys DesignWare block is used in some ARM devices (picoxcell)
and can be configured to provide multiple banks of GPIO pins.
v12: - Add irq_startup/shutdown
- do irq_create_mapping() in probe, irq_find_mapping() in to_irq()
- Adjust mappings to show support for 1 gpio per port.
- gpio-cells = <1>
v11: - Use NULL when checking existence of 'interrupts' property
- Bindings descriptions cleanup
v10: - in documentation nr-gpio -> nr-gpios
v9: - cleanup in dt bindings doc
- use of_get_child_count()
v8: - remove socfpga.dtsi changes
- minor cleanup in devicetree documentation
v7: - use irq_generic_chip
- support one irq per gpio line or one irq for many
- s/bank/port/ and other cleanup
v6: - (atull) squash the set of patches
- use linear irq domain
- build fixes. Original driver was reviewed on v3.2.
- Fix setting irq edge type for 'rising' and 'both'.
- Support as a loadable module.
- Use bgpio_chip's spinlock during register access.
- Clean up register names to match spec
- s/bank/port/ because register names use the word 'port'
- s/nr-gpio/nr-gpios/
- don't get/put the of_node
- remove signoffs/acked-by's because of changes
- other cleanup
v5: - handle sparse bank population correctly
v3: - depend on rather than select IRQ_DOMAIN
- split IRQ support into a separate patch
v2: - use Rob Herring's irqdomain in generic irq chip patches
- use reg property to indicate bank index
- support irqs on both edges based on LinusW's u300 driver
Signed-off-by: Jamie Iles <jamie@jamieiles.com>
Signed-off-by: Alan Tull <atull@altera.com>
Reviewed-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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