diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0177-BCM270X_DT-Add-SDIO-overlay.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0177-BCM270X_DT-Add-SDIO-overlay.patch | 80 |
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>; ++ }; ++ }; ++ }; ++}; |