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dt-bindings: gpio: rcar: Add gpio-reserved-ranges support

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Update the DT bindings documentation with the optional gpio-reserved-ranges
properties.

Signed-off-by: Biju Das <biju.das@bp.renesas.com>
Reviewed-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Biju Das
2018-08-07 08:57:03 +01:00
committed by Linus Walleij
parent 496069b87e
commit c0f6afad46
1 changed files with 35 additions and 26 deletions
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45
Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
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@@ -38,7 +38,7 @@ Required Properties:
- #gpio-cells: Should be 2. The first cell is the GPIO number and the second - #gpio-cells: Should be 2. The first cell is the GPIO number and the second
cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>. Only the cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>. Only the
GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported. GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported.
- gpio-ranges: Range of pins managed by the GPIO controller. - gpio-ranges: See gpio.txt.
Optional properties: Optional properties:
@@ -46,35 +46,44 @@ Optional properties:
mandatory if the hardware implements a controllable functional clock for mandatory if the hardware implements a controllable functional clock for
the GPIO instance. the GPIO instance.
Please refer to gpio.txt in this directory for details of gpio-ranges property - gpio-reserved-ranges: See gpio.txt.
and the common GPIO bindings used by client devices.
Please refer to gpio.txt in this directory for the common GPIO bindings used by
client devices.
The GPIO controller also acts as an interrupt controller. It uses the default The GPIO controller also acts as an interrupt controller. It uses the default
two cells specifier as described in Documentation/devicetree/bindings/ two cells specifier as described in Documentation/devicetree/bindings/
interrupt-controller/interrupts.txt. interrupt-controller/interrupts.txt.
Example: R8A7779 (R-Car H1) GPIO controller nodes Example: R8A77470 (RZ/G1C) GPIO controller nodes
gpio0: gpio@ffc40000 { gpio0: gpio@e6050000 {
compatible = "renesas,gpio-r8a7779", "renesas,rcar-gen1-gpio"; compatible = "renesas,gpio-r8a77470",
reg = <0xffc40000 0x2c>; "renesas,rcar-gen2-gpio";
interrupt-parent = <&gic>; reg = <0 0xe6050000 0 0x50>;
interrupts = <0 141 0x4>; interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>;
#gpio-cells = <2>; #gpio-cells = <2>;
gpio-controller; gpio-controller;
gpio-ranges = <&pfc 0 0 32>; gpio-ranges = <&pfc 0 0 23>;
interrupt-controller;
#interrupt-cells = <2>; #interrupt-cells = <2>;
interrupt-controller;
clocks = <&cpg CPG_MOD 912>;
power-domains = <&sysc R8A77470_PD_ALWAYS_ON>;
resets = <&cpg 912>;
}; };
... ...
gpio6: gpio@ffc46000 { gpio3: gpio@e6053000 {
compatible = "renesas,gpio-r8a7779", "renesas,rcar-gen1-gpio"; compatible = "renesas,gpio-r8a77470",
reg = <0xffc46000 0x2c>; "renesas,rcar-gen2-gpio";
interrupt-parent = <&gic>; reg = <0 0xe6053000 0 0x50>;
interrupts = <0 147 0x4>; interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
#gpio-cells = <2>; #gpio-cells = <2>;
gpio-controller; gpio-controller;
gpio-ranges = <&pfc 0 192 9>; gpio-ranges = <&pfc 0 96 30>;
interrupt-controller; gpio-reserved-ranges = <17 10>;
#interrupt-cells = <2>; #interrupt-cells = <2>;
interrupt-controller;
clocks = <&cpg CPG_MOD 909>;
power-domains = <&sysc R8A77470_PD_ALWAYS_ON>;
resets = <&cpg 909>;
}; };