1 files changed, 80 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0177-BCM270X_DT-Add-SDIO-overlay.patch b/target/linux/brcm2708/patches-4.1/0177-BCM270X_DT-Add-SDIO-overlay.patch
new file mode 100644
index 0000000..0ffa829
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.1/0177-BCM270X_DT-Add-SDIO-overlay.patch
@@ -0,0 +1,80 @@
+From a0adae0d3e1327dfa796986e45bbe20dee335f2c Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Tue, 8 Sep 2015 15:14:50 +0100
+Subject: [PATCH 177/203] BCM270X_DT: Add SDIO overlay
+
+Enable SDIO from MMC interface via GPIOs 22-27. Includes the sdhost
+overlay to free up the MMC interface.
+---
+ arch/arm/boot/dts/overlays/Makefile         |  1 +
+ arch/arm/boot/dts/overlays/README           | 15 +++++++++++++++
+ arch/arm/boot/dts/overlays/sdio-overlay.dts | 29 +++++++++++++++++++++++++++++
+ 3 files changed, 45 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/sdio-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -44,6 +44,7 @@ dtb-$(RPI_DT_OVERLAYS) += rpi-ft5406-ove
+ dtb-$(RPI_DT_OVERLAYS) += rpi-proto-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += rpi-sense-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += sdhost-overlay.dtb
++dtb-$(RPI_DT_OVERLAYS) += sdio-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += spi-bcm2708-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += spi-bcm2835-overlay.dtb
+ dtb-$(RPI_DT_OVERLAYS) += spi-dma-overlay.dtb
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -513,6 +513,21 @@ Params: overclock_50             Clock (
+         debug                    Enable debug output (default off)
+ 
+ 
++Name:   sdio
++Info:   Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock,
++        and enables SDIO via GPIOs 22-27.
++Load:   dtoverlay=sdio,<param>=<val>
++Params: overclock_50             Clock (in MHz) to use when the MMC framework
++                                 requests 50MHz
++
++        force_pio                Disable DMA support (default off)
++
++        pio_limit                Number of blocks above which to use DMA
++                                 (default 1)
++
++        debug                    Enable debug output (default off)
++
++
+ Name:   spi-bcm2708
+ Info:   Selects the bcm2708-spi SPI driver
+ Load:   dtoverlay=spi-bcm2708
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/sdio-overlay.dts
+@@ -0,0 +1,29 @@
++/* Enable SDIO from MMC interface via GPIOs 22-27. Includes sdhost overlay. */
++
++/include/ "sdhost-overlay.dts"
++
++/{
++	compatible = "brcm,bcm2708";
++
++	fragment@3 {
++		target = <&mmc>;
++		__overlay__ {
++			compatible = "brcm,bcm2835-mmc";
++			pinctrl-names = "default";
++			pinctrl-0 = <&sdio_pins>;
++			non-removable;
++			status = "okay";
++		};
++	};
++
++	fragment@4 {
++		target = <&gpio>;
++		__overlay__ {
++			sdio_pins: sdio_pins {
++				brcm,pins = <22 23 24 25 26 27>;
++				brcm,function = <7 7 7 7 7 7>; /* ALT3 = SD1 */
++				brcm,pull = <0 2 2 2 2 2>;
++			};
++		};
++	};
++};