diff options
author | Chunyan Zhang <chunyan.zhang@unisoc.com> | 2023-01-10 04:49:42 +0300 |
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committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2023-01-30 17:55:30 +0300 |
commit | bf26a472a26ea286d8d48810989bbc5af613c581 (patch) | |
tree | 5e58ce6668d6d3d666e52dcdf42bfa0bd0b115cc /Documentation/devicetree/bindings/gpio | |
parent | 59184e1273ebb4cf32c28086faeb12725e417c9f (diff) | |
download | linux-bf26a472a26ea286d8d48810989bbc5af613c581.tar.xz |
dt-bindings: gpio: Convert Unisoc EIC controller binding to yaml
Convert the Unisoc EIC controller binding to DT schema format.
Update the maxItems of 'reg' property, since the current gpio-eic-sprd
driver supports 3 reg items. Also removed a few similar examples.
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/gpio')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-eic-sprd.txt | 97 | ||||
-rw-r--r-- | Documentation/devicetree/bindings/gpio/sprd,gpio-eic.yaml | 103 |
2 files changed, 103 insertions, 97 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-eic-sprd.txt b/Documentation/devicetree/bindings/gpio/gpio-eic-sprd.txt deleted file mode 100644 index 54040a2bfe3a..000000000000 --- a/Documentation/devicetree/bindings/gpio/gpio-eic-sprd.txt +++ /dev/null @@ -1,97 +0,0 @@ -Spreadtrum EIC controller bindings - -The EIC is the abbreviation of external interrupt controller, which can -be used only in input mode. The Spreadtrum platform has 2 EIC controllers, -one is in digital chip, and another one is in PMIC. The digital chip EIC -controller contains 4 sub-modules: EIC-debounce, EIC-latch, EIC-async and -EIC-sync. But the PMIC EIC controller contains only one EIC-debounce sub- -module. - -The EIC-debounce sub-module provides up to 8 source input signal -connections. A debounce mechanism is used to capture the input signals' -stable status (millisecond resolution) and a single-trigger mechanism -is introduced into this sub-module to enhance the input event detection -reliability. In addition, this sub-module's clock can be shut off -automatically to reduce power dissipation. Moreover the debounce range -is from 1ms to 4s with a step size of 1ms. The input signal will be -ignored if it is asserted for less than 1 ms. - -The EIC-latch sub-module is used to latch some special power down signals -and generate interrupts, since the EIC-latch does not depend on the APB -clock to capture signals. - -The EIC-async sub-module uses a 32kHz clock to capture the short signals -(microsecond resolution) to generate interrupts by level or edge trigger. - -The EIC-sync is similar with GPIO's input function, which is a synchronized -signal input register. It can generate interrupts by level or edge trigger -when detecting input signals. - -Required properties: -- compatible: Should be one of the following: - "sprd,sc9860-eic-debounce", - "sprd,sc9860-eic-latch", - "sprd,sc9860-eic-async", - "sprd,sc9860-eic-sync", - "sprd,sc2731-eic". -- reg: Define the base and range of the I/O address space containing - the GPIO controller registers. -- gpio-controller: Marks the device node as a GPIO controller. -- #gpio-cells: Should be <2>. The first cell is the gpio number and - the second cell is used to specify optional parameters. -- interrupt-controller: Marks the device node as an interrupt controller. -- #interrupt-cells: Should be <2>. Specifies the number of cells needed - to encode interrupt source. -- interrupts: Should be the port interrupt shared by all the gpios. - -Example: - eic_debounce: gpio@40210000 { - compatible = "sprd,sc9860-eic-debounce"; - reg = <0 0x40210000 0 0x80>; - gpio-controller; - #gpio-cells = <2>; - interrupt-controller; - #interrupt-cells = <2>; - interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_HIGH>; - }; - - eic_latch: gpio@40210080 { - compatible = "sprd,sc9860-eic-latch"; - reg = <0 0x40210080 0 0x20>; - gpio-controller; - #gpio-cells = <2>; - interrupt-controller; - #interrupt-cells = <2>; - interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_HIGH>; - }; - - eic_async: gpio@402100a0 { - compatible = "sprd,sc9860-eic-async"; - reg = <0 0x402100a0 0 0x20>; - gpio-controller; - #gpio-cells = <2>; - interrupt-controller; - #interrupt-cells = <2>; - interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_HIGH>; - }; - - eic_sync: gpio@402100c0 { - compatible = "sprd,sc9860-eic-sync"; - reg = <0 0x402100c0 0 0x20>; - gpio-controller; - #gpio-cells = <2>; - interrupt-controller; - #interrupt-cells = <2>; - interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_HIGH>; - }; - - pmic_eic: gpio@300 { - compatible = "sprd,sc2731-eic"; - reg = <0x300>; - interrupt-parent = <&sc2731_pmic>; - interrupts = <5 IRQ_TYPE_LEVEL_HIGH>; - gpio-controller; - #gpio-cells = <2>; - interrupt-controller; - #interrupt-cells = <2>; - }; diff --git a/Documentation/devicetree/bindings/gpio/sprd,gpio-eic.yaml b/Documentation/devicetree/bindings/gpio/sprd,gpio-eic.yaml new file mode 100644 index 000000000000..a21350bd0f2c --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/sprd,gpio-eic.yaml @@ -0,0 +1,103 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# Copyright 2022 Unisoc Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/gpio/sprd,gpio-eic.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Unisoc EIC controller + +maintainers: + - Orson Zhai <orsonzhai@gmail.com> + - Baolin Wang <baolin.wang7@gmail.com> + - Chunyan Zhang <zhang.lyra@gmail.com> + +description: | + The EIC is the abbreviation of external interrupt controller, which can + be used only in input mode. The Spreadtrum platform has 2 EIC controllers, + one is in digital chip, and another one is in PMIC. The digital chip EIC + controller contains 4 sub-modules, i.e. EIC-debounce, EIC-latch, EIC-async and + EIC-sync. But the PMIC EIC controller contains only one EIC-debounce sub- + module. + + The EIC-debounce sub-module provides up to 8 source input signal + connections. A debounce mechanism is used to capture the input signals' + stable status (millisecond resolution) and a single-trigger mechanism + is introduced into this sub-module to enhance the input event detection + reliability. In addition, this sub-module's clock can be shut off + automatically to reduce power dissipation. Moreover the debounce range + is from 1ms to 4s with a step size of 1ms. The input signal will be + ignored if it is asserted for less than 1 ms. + + The EIC-latch sub-module is used to latch some special power down signals + and generate interrupts, since the EIC-latch does not depend on the APB + clock to capture signals. + + The EIC-async sub-module uses a 32kHz clock to capture the short signals + (microsecond resolution) to generate interrupts by level or edge trigger. + + The EIC-sync is similar with GPIO's input function, which is a synchronized + signal input register. It can generate interrupts by level or edge trigger + when detecting input signals. + +properties: + compatible: + enum: + - sprd,sc9860-eic-debounce + - sprd,sc9860-eic-latch + - sprd,sc9860-eic-async + - sprd,sc9860-eic-sync + - sprd,sc2731-eic + + reg: + minItems: 1 + maxItems: 3 + description: + EIC controller can support maximum 3 banks which has its own + address base. + + gpio-controller: true + + "#gpio-cells": + const: 2 + + interrupt-controller: true + + "#interrupt-cells": + const: 2 + + interrupts: + maxItems: 1 + description: + The interrupt shared by all GPIO lines for this controller. + +required: + - compatible + - reg + - gpio-controller + - "#gpio-cells" + - interrupt-controller + - "#interrupt-cells" + - interrupts + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + + soc { + #address-cells = <2>; + #size-cells = <2>; + + eic_debounce: gpio@40210000 { + compatible = "sprd,sc9860-eic-debounce"; + reg = <0 0x40210000 0 0x80>; + gpio-controller; + #gpio-cells = <2>; + interrupt-controller; + #interrupt-cells = <2>; + interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_HIGH>; + }; + }; +... |