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-rw-r--r--target/linux/brcm2708/patches-4.1/0177-BCM270X_DT-Add-SDIO-overlay.patch80
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 0000000000..0ffa82905e
--- /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>;
++ };
++ };
++ };
++};