diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0690-overlays-mcp23017-Add-option-for-not-connecting-the-.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0690-overlays-mcp23017-Add-option-for-not-connecting-the-.patch | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0690-overlays-mcp23017-Add-option-for-not-connecting-the-.patch b/target/linux/bcm27xx/patches-4.19/950-0690-overlays-mcp23017-Add-option-for-not-connecting-the-.patch new file mode 100644 index 0000000000..e6376d7f68 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0690-overlays-mcp23017-Add-option-for-not-connecting-the-.patch @@ -0,0 +1,66 @@ +From b37ac8c50684c3517fb9c6f737e7ea444a7d7405 Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.org> +Date: Thu, 5 Sep 2019 17:41:46 +0100 +Subject: [PATCH] overlays: mcp23017: Add option for not connecting the + int GPIO + +The interrupt GPIO is optional to the driver, therefore add an +option to not configure it. + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> +--- + arch/arm/boot/dts/overlays/README | 1 + + .../boot/dts/overlays/mcp23017-overlay.dts | 21 +++++++++++++------ + 2 files changed, 16 insertions(+), 6 deletions(-) + +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -1427,6 +1427,7 @@ Params: gpiopin Gpio pin + addr I2C address of the MCP23017 (default: 0x20) + + mcp23008 Configure an MCP23008 instead. ++ noints Disable the interrupt GPIO line. + + + Name: mcp23s17 +--- a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts ++++ b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts +@@ -34,11 +34,6 @@ + reg = <0x20>; + gpio-controller; + #gpio-cells = <2>; +- #interrupt-cells=<2>; +- interrupt-parent = <&gpio>; +- interrupts = <4 2>; +- interrupt-controller; +- microchip,irq-mirror; + + status = "okay"; + }; +@@ -52,11 +47,25 @@ + }; + }; + ++ fragment@4 { ++ target = <&i2c1>; ++ __overlay__ { ++ mcp23017_irq: mcp@20 { ++ #interrupt-cells=<2>; ++ interrupt-parent = <&gpio>; ++ interrupts = <4 2>; ++ interrupt-controller; ++ microchip,irq-mirror; ++ }; ++ }; ++ }; ++ + __overrides__ { + gpiopin = <&mcp23017_pins>,"brcm,pins:0", +- <&mcp23017>,"interrupts:0"; ++ <&mcp23017_irq>,"interrupts:0"; + addr = <&mcp23017>,"reg:0", <&mcp23017_pins>,"reg:0"; + mcp23008 = <0>,"=3"; ++ noints = <0>,"!1!4"; + }; + }; + |