diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0814-overlays-Fix-mcp23017-s-addr-parameter.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0814-overlays-Fix-mcp23017-s-addr-parameter.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0814-overlays-Fix-mcp23017-s-addr-parameter.patch b/target/linux/bcm27xx/patches-4.19/950-0814-overlays-Fix-mcp23017-s-addr-parameter.patch new file mode 100644 index 0000000000..f1750b2e2f --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0814-overlays-Fix-mcp23017-s-addr-parameter.patch @@ -0,0 +1,46 @@ +From 11ef396f6e72b22469e1c8aebf5fd50488a9431d Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Tue, 4 Feb 2020 15:22:55 +0000 +Subject: [PATCH] overlays: Fix mcp23017's addr parameter + +The addr parameter of the mcp23017 overlay was broken by the addition +of the noints parameter; splitting the mcp node in two without also +modifying the second half from the addr parameter would cause the two +halves to separate. Change the implementation strategy to patch +fragment 2 (as was originally proposed). This will prevent the +overlay from being applied at runtime until the "dtoverlay" command +is improved, but the overlay already has this restriction due to +fragment 3 so this isn't a step backwards. + +See: https://github.com/raspberrypi/linux/issues/3449 + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + arch/arm/boot/dts/overlays/mcp23017-overlay.dts | 16 +++++++--------- + 1 file changed, 7 insertions(+), 9 deletions(-) + +--- a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts ++++ b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts +@@ -48,15 +48,13 @@ + }; + + fragment@4 { +- target = <&i2c1>; +- __overlay__ { +- mcp23017_irq: mcp@20 { +- #interrupt-cells=<2>; +- interrupt-parent = <&gpio>; +- interrupts = <4 2>; +- interrupt-controller; +- microchip,irq-mirror; +- }; ++ target = <&mcp23017>; ++ mcp23017_irq: __overlay__ { ++ #interrupt-cells=<2>; ++ interrupt-parent = <&gpio>; ++ interrupts = <4 2>; ++ interrupt-controller; ++ microchip,irq-mirror; + }; + }; + |