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Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0468-overlays-Update-w1-gpio-and-w1-gpio-pullup.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0468-overlays-Update-w1-gpio-and-w1-gpio-pullup.patch78
1 files changed, 78 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0468-overlays-Update-w1-gpio-and-w1-gpio-pullup.patch b/target/linux/brcm2708/patches-4.19/950-0468-overlays-Update-w1-gpio-and-w1-gpio-pullup.patch
new file mode 100644
index 0000000000..f19a6380ce
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0468-overlays-Update-w1-gpio-and-w1-gpio-pullup.patch
@@ -0,0 +1,78 @@
+From 531ae7af75b2be2867814693f069fb51e3155341 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Wed, 12 Jun 2019 17:32:11 +0100
+Subject: [PATCH] overlays: Update w1-gpio and w1-gpio-pullup
+
+The parasitic power (power on data) feature is now enabled by
+default in the w1-gpio driver, so update the README and make the
+"pullup" parameter a no-op.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/README | 9 ++-------
+ arch/arm/boot/dts/overlays/w1-gpio-overlay.dts | 3 +--
+ arch/arm/boot/dts/overlays/w1-gpio-pullup-overlay.dts | 3 +--
+ 3 files changed, 4 insertions(+), 11 deletions(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -2261,9 +2261,7 @@ Info: Configures the w1-gpio Onewire i
+ Use this overlay if you *don't* need a GPIO to drive an external pullup.
+ Load: dtoverlay=w1-gpio,<param>=<val>
+ Params: gpiopin GPIO for I/O (default "4")
+-
+- pullup Non-zero, "on", or "y" to enable the parasitic
+- power (2-wire, power-on-data) feature
++ pullup Now enabled by default (ignored)
+
+
+ Name: w1-gpio-pullup
+@@ -2271,11 +2269,8 @@ Info: Configures the w1-gpio Onewire i
+ Use this overlay if you *do* need a GPIO to drive an external pullup.
+ Load: dtoverlay=w1-gpio-pullup,<param>=<val>
+ Params: gpiopin GPIO for I/O (default "4")
+-
+- pullup Non-zero, "on", or "y" to enable the parasitic
+- power (2-wire, power-on-data) feature
+-
+ extpullup GPIO for external pullup (default "5")
++ pullup Now enabled by default (ignored)
+
+
+ Name: wittypi
+--- a/arch/arm/boot/dts/overlays/w1-gpio-overlay.dts
++++ b/arch/arm/boot/dts/overlays/w1-gpio-overlay.dts
+@@ -14,7 +14,6 @@
+ pinctrl-names = "default";
+ pinctrl-0 = <&w1_pins>;
+ gpios = <&gpio 4 0>;
+- rpi,parasitic-power = <0>;
+ status = "okay";
+ };
+ };
+@@ -36,6 +35,6 @@
+ <&w1>,"reg:0",
+ <&w1_pins>,"brcm,pins:0",
+ <&w1_pins>,"reg:0";
+- pullup = <&w1>,"rpi,parasitic-power:0";
++ pullup; // Silently ignore unneeded parameter
+ };
+ };
+--- a/arch/arm/boot/dts/overlays/w1-gpio-pullup-overlay.dts
++++ b/arch/arm/boot/dts/overlays/w1-gpio-pullup-overlay.dts
+@@ -14,7 +14,6 @@
+ pinctrl-names = "default";
+ pinctrl-0 = <&w1_pins>;
+ gpios = <&gpio 4 0>, <&gpio 5 1>;
+- rpi,parasitic-power = <0>;
+ status = "okay";
+ };
+ };
+@@ -38,6 +37,6 @@
+ <&w1_pins>,"reg:0";
+ extpullup = <&w1>,"gpios:16",
+ <&w1_pins>,"brcm,pins:4";
+- pullup = <&w1>,"rpi,parasitic-power:0";
++ pullup; // Silently ignore unneeded parameter
+ };
+ };