diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0156-BCM270X_DT-at86rf233-overlay-drop-to-3MHz.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0156-BCM270X_DT-at86rf233-overlay-drop-to-3MHz.patch | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0156-BCM270X_DT-at86rf233-overlay-drop-to-3MHz.patch b/target/linux/brcm2708/patches-4.4/0156-BCM270X_DT-at86rf233-overlay-drop-to-3MHz.patch new file mode 100644 index 0000000000..7df9187d67 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0156-BCM270X_DT-at86rf233-overlay-drop-to-3MHz.patch @@ -0,0 +1,36 @@ +From 8941fe4985a1cc8f800be00224c6a2e741789d03 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Thu, 18 Feb 2016 15:28:14 +0000 +Subject: [PATCH 156/156] BCM270X_DT: at86rf233 overlay - drop to 3MHz + +The consensus is that 6MHz is too fast, but that 3MHz is OK. + +See: https://github.com/raspberrypi/linux/issues/1294 + https://github.com/raspberrypi/linux/issues/1151 +--- + arch/arm/boot/dts/overlays/README | 2 +- + arch/arm/boot/dts/overlays/at86rf233-overlay.dts | 2 +- + 2 files changed, 2 insertions(+), 2 deletions(-) + +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -188,7 +188,7 @@ Load: dtoverlay=at86rf233,<param>=<val + Params: interrupt GPIO used for INT (default 23) + reset GPIO used for Reset (default 24) + sleep GPIO used for Sleep (default 25) +- speed SPI bus speed in Hz (default 6000000) ++ speed SPI bus speed in Hz (default 3000000) + trim Fine tuning of the internal capacitance + arrays (0=+0pF, 15=+4.5pF, default 15) + +--- a/arch/arm/boot/dts/overlays/at86rf233-overlay.dts ++++ b/arch/arm/boot/dts/overlays/at86rf233-overlay.dts +@@ -25,7 +25,7 @@ + interrupts = <23 4>; /* active high */ + reset-gpio = <&gpio 24 1>; + sleep-gpio = <&gpio 25 1>; +- spi-max-frequency = <6000000>; ++ spi-max-frequency = <3000000>; + xtal-trim = /bits/ 8 <0xf>; + }; + }; |