diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0419-dts-Add-overlay-for-NXP-SC16IS752-Dual-UART-with-SPI.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0419-dts-Add-overlay-for-NXP-SC16IS752-Dual-UART-with-SPI.patch | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0419-dts-Add-overlay-for-NXP-SC16IS752-Dual-UART-with-SPI.patch b/target/linux/brcm2708/patches-4.4/0419-dts-Add-overlay-for-NXP-SC16IS752-Dual-UART-with-SPI.patch new file mode 100644 index 0000000000..f47efb7b8b --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0419-dts-Add-overlay-for-NXP-SC16IS752-Dual-UART-with-SPI.patch @@ -0,0 +1,106 @@ +From fbbafbb2b4739eb6980f18c78c276ffbee2602db Mon Sep 17 00:00:00 2001 +From: Erdem MEYDANLI <erdem.meydanli@punica.com.tr> +Date: Thu, 30 Jun 2016 21:05:08 +0300 +Subject: [PATCH] dts: Add overlay for NXP SC16IS752 Dual UART with SPI + Interface + +--- + arch/arm/boot/dts/overlays/Makefile | 1 + + arch/arm/boot/dts/overlays/README | 10 ++++ + .../boot/dts/overlays/sc16is752-spi1-overlay.dts | 61 ++++++++++++++++++++++ + 3 files changed, 72 insertions(+) + create mode 100644 arch/arm/boot/dts/overlays/sc16is752-spi1-overlay.dts + +--- a/arch/arm/boot/dts/overlays/Makefile ++++ b/arch/arm/boot/dts/overlays/Makefile +@@ -71,6 +71,7 @@ dtbo-$(RPI_DT_OVERLAYS) += rpi-ft5406.dt + dtbo-$(RPI_DT_OVERLAYS) += rpi-proto.dtbo + dtbo-$(RPI_DT_OVERLAYS) += rpi-sense.dtbo + dtbo-$(RPI_DT_OVERLAYS) += rra-digidac1-wm8741-audio.dtbo ++dtbo-$(RPI_DT_OVERLAYS) += sc16is752-spi1.dtbo + dtbo-$(RPI_DT_OVERLAYS) += sdhost.dtbo + dtbo-$(RPI_DT_OVERLAYS) += sdio.dtbo + dtbo-$(RPI_DT_OVERLAYS) += sdio-1bit.dtbo +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -888,6 +888,16 @@ Load: dtoverlay=rra-digidac1-wm8741-au + Params: <None> + + ++Name: sc16is752-spi1 ++Info: Overlay for the NXP SC16IS752 Dual UART with SPI Interface ++ Enables the chip on SPI1. ++ N.B.: spi1 is only accessible on devices with a 40pin header, eg: ++ A+, B+, Zero and PI2 B; as well as the Compute Module. ++ ++Load: dtoverlay=sc16is752-spi1,<param>=<val> ++Params: int_pin GPIO used for IRQ (default 24) ++ ++ + Name: sdhost + Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock. + N.B. This overlay is designed for situations where the mmc driver is +--- /dev/null ++++ b/arch/arm/boot/dts/overlays/sc16is752-spi1-overlay.dts +@@ -0,0 +1,61 @@ ++/dts-v1/; ++/plugin/; ++ ++/ { ++ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709"; ++ ++ fragment@0 { ++ target = <&gpio>; ++ __overlay__ { ++ spi1_pins: spi1_pins { ++ brcm,pins = <19 20 21>; ++ brcm,function = <3>; /* alt4 */ ++ }; ++ ++ spi1_cs_pins: spi1_cs_pins { ++ brcm,pins = <18>; ++ brcm,function = <1>; /* output */ ++ }; ++ }; ++ }; ++ ++ fragment@1 { ++ target = <&spi1>; ++ frag1: __overlay__ { ++ #address-cells = <1>; ++ #size-cells = <0>; ++ pinctrl-names = "default"; ++ pinctrl-0 = <&spi1_pins &spi1_cs_pins>; ++ cs-gpios = <&gpio 18 1>; ++ status = "okay"; ++ ++ sc16is752: sc16is752@0 { ++ compatible = "nxp,sc16is752"; ++ reg = <0>; /* CE0 */ ++ clocks = <&sc16is752_clk>; ++ interrupt-parent = <&gpio>; ++ interrupts = <24 2>; /* IRQ_TYPE_EDGE_FALLING */ ++ #gpio-controller; ++ #gpio-cells = <2>; ++ spi-max-frequency = <4000000>; ++ ++ sc16is752_clk: sc16is752_clk { ++ compatible = "fixed-clock"; ++ #clock-cells = <0>; ++ clock-frequency = <14745600>; ++ }; ++ }; ++ }; ++ }; ++ ++ fragment@2 { ++ target = <&aux>; ++ __overlay__ { ++ status = "okay"; ++ }; ++ }; ++ ++ __overrides__ { ++ int_pin = <&sc16is752>,"interrupts:0"; ++ }; ++}; |