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-rw-r--r--target/linux/brcm2708/patches-4.4/0125-SDIO-overlay-add-bus_width-parameter.patch42
1 files changed, 42 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0125-SDIO-overlay-add-bus_width-parameter.patch b/target/linux/brcm2708/patches-4.4/0125-SDIO-overlay-add-bus_width-parameter.patch
new file mode 100644
index 0000000000..c16a0027d5
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.4/0125-SDIO-overlay-add-bus_width-parameter.patch
@@ -0,0 +1,42 @@
+From c671b8fada8fe75583e25cd93f9a414c7024e613 Mon Sep 17 00:00:00 2001
+From: Andrew Litt <ajlitt@splunge.net>
+Date: Mon, 11 Jan 2016 07:55:54 +0000
+Subject: [PATCH 125/232] SDIO-overlay: add bus_width parameter
+
+Allow setting of the SDIO bus width capability of the bcm2835-mmc
+host. This is helpful when only a 1 bit wide bus is connected
+between host and device but both host and device advertise 4 bit
+mode.
+---
+ arch/arm/boot/dts/overlays/README | 2 ++
+ arch/arm/boot/dts/overlays/sdio-overlay.dts | 2 ++
+ 2 files changed, 4 insertions(+)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -634,6 +634,8 @@ Params: overclock_50 Clock (
+ poll_once Disable SDIO-device polling every second
+ (default on: polling once at boot-time)
+
++ bus_width Set the SDIO host bus width (default 4 bits)
++
+
+ Name: sdtweak
+ Info: Tunes the bcm2835-sdhost SD/MMC driver
+--- a/arch/arm/boot/dts/overlays/sdio-overlay.dts
++++ b/arch/arm/boot/dts/overlays/sdio-overlay.dts
+@@ -11,6 +11,7 @@
+ pinctrl-names = "default";
+ pinctrl-0 = <&sdio_pins>;
+ non-removable;
++ bus-width = <4>;
+ status = "okay";
+ };
+ };
+@@ -28,5 +29,6 @@
+
+ __overrides__ {
+ poll_once = <&sdio_mmc>,"non-removable?";
++ bus_width = <&sdio_mmc>,"bus-width:0";
+ };
+ };