brcm2708: update to latest patches from RPi foundation

[openwrt/staging/chunkeey.git] / target / linux / brcm2708 / patches-4.19 / 950-0267-overlays-mcp23017-Support-the-MCP23008.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0267-overlays-mcp23017-Support-the-MCP23008.patch b/target/linux/brcm2708/patches-4.19/950-0267-overlays-mcp23017-Support-the-MCP23008.patch
new file mode 100644 (file)
index 0000000..44f295a
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0267-overlays-mcp23017-Support-the-MCP23008.patch
@@ -0,0 +1,49 @@
+From c85a1ccbc6b1cab51a5fe5b916bcaf40bcd9096c Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Mon, 21 Jan 2019 12:19:57 +0000
+Subject: [PATCH] overlays: mcp23017: Support the MCP23008
+
+Add an 'mcp23008' parameter to enable support for the MCP23008 device.
+
+See: https://github.com/raspberrypi/linux/issues/2818
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/README               |  2 ++
+ arch/arm/boot/dts/overlays/mcp23017-overlay.dts | 10 +++++++++-
+ 2 files changed, 11 insertions(+), 1 deletion(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1212,6 +1212,8 @@ Params: gpiopin                 Gpio pin
+ 
+         addr                    I2C address of the MCP23017 (default: 0x20)
+ 
++        mcp23008                Configure an MCP23008 instead.
++
+ 
+ Name:   mcp23s17
+ Info:   Configures the MCP23S08/17 SPI GPIO expanders.
+--- a/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
++++ b/arch/arm/boot/dts/overlays/mcp23017-overlay.dts
+@@ -44,11 +44,19 @@
+                       };
+               };
+       };
+-      
++
++      fragment@3 {
++              target = <&mcp23017>;
++              __dormant__ {
++                      compatible = "microchip,mcp23008";
++              };
++      };
++
+       __overrides__ {
+               gpiopin = <&mcp23017_pins>,"brcm,pins:0",
+                               <&mcp23017>,"interrupts:0";
+               addr = <&mcp23017>,"reg:0";
++              mcp23008 = <0>,"=3";
+       };
+ };
+