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https://github.com/Ysurac/openmptcprouter.git
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108 lines
2.8 KiB
Diff
108 lines
2.8 KiB
Diff
From c8e4062ca143c2bed09344bc23d3c4c9c9040577 Mon Sep 17 00:00:00 2001
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From: Richard Oliver <richard.oliver@raspberrypi.com>
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Date: Fri, 24 May 2024 10:34:45 +0100
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Subject: [PATCH 484/697] spi: dt-bindings: Add RPI RP2040 GPIO Bridge
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Add YAML device tree bindings for the Raspberry Pi RP2040 GPIO Bridge.
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Signed-off-by: Richard Oliver <richard.oliver@raspberrypi.com>
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---
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.../spi/raspberrypi,rp2040-gpio-bridge.yaml | 77 +++++++++++++++++++
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MAINTAINERS | 5 ++
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2 files changed, 82 insertions(+)
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create mode 100644 Documentation/devicetree/bindings/spi/raspberrypi,rp2040-gpio-bridge.yaml
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/spi/raspberrypi,rp2040-gpio-bridge.yaml
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@@ -0,0 +1,77 @@
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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+%YAML 1.2
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+---
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+$id: http://devicetree.org/schemas/spi/raspberrypi,rp2040-gpio-bridge.yaml#
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+$schema: http://devicetree.org/meta-schemas/core.yaml#
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+
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+title: Raspberry Pi RP2040 GPIO Bridge
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+
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+maintainers:
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+ - Raspberry Pi <kernel-list@raspberrypi.com>
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+
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+description: |-
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+ The Raspberry Pi PR2040 GPIO bridge can be used as a GPIO expander and
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+ Tx-only SPI master.
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+
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+properties:
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+ reg:
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+ description: I2C slave address
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+ const: 0x40
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+
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+ compatible:
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+ const: raspberrypi,rp2040-gpio-bridge
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+
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+ power-supply:
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+ description: Phandle to the regulator that powers the RP2040.
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+
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+ '#address-cells':
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+ const: 1
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+
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+ '#size-cells':
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+ const: 0
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+
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+ '#gpio-cells':
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+ const: 2
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+
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+ gpio-controller: true
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+
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+ fast_xfer_requires_i2c_lock:
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+ description: Set if I2C bus should be locked during fast transfer.
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+
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+ fast_xfer_recv_gpio_base:
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+ description: RP2040 GPIO base for fast transfer pair.
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+
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+ fast_xfer-gpios:
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+ description: RP1 GPIOs to use for fast transfer clock and data.
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+
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+required:
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+ - reg
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+ - compatible
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+ - power-supply
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+ - '#gpio-cells'
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+ - gpio-controller
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+
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+additionalProperties: false
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+
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+examples:
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+ - |
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+ i2c {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ spi@40 {
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+ reg = <0x40>;
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+ compatible = "raspberrypi,rp2040-gpio-bridge";
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+ status = "disabled";
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+
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+ power-supply = <&cam_dummy_reg>;
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+
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+ #gpio-cells = <2>;
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+ gpio-controller;
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+ };
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+ };
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+
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+...
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+
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--- a/MAINTAINERS
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+++ b/MAINTAINERS
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@@ -19353,6 +19353,11 @@ L: linux-edac@vger.kernel.org
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S: Maintained
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F: drivers/ras/amd/fmpm.c
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+RASPBERRY PI RP2040 GPIO BRIDGE DRIVER
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+M: Raspberry Pi Kernel Maintenance <kernel-list@raspberrypi.com>
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+S: Maintained
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+F: Documentation/devicetree/bindings/spi/raspberrypi,rp2040-gpio-bridge.yaml
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+
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RASPBERRY PI PISP BACK END
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M: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
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L: Raspberry Pi Kernel Maintenance <kernel-list@raspberrypi.com>
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