diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0098-BCM270X_DT-Add-overlay-to-enable-uart1.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.1/0098-BCM270X_DT-Add-overlay-to-enable-uart1.patch | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0098-BCM270X_DT-Add-overlay-to-enable-uart1.patch b/target/linux/brcm2708/patches-4.1/0098-BCM270X_DT-Add-overlay-to-enable-uart1.patch new file mode 100644 index 0000000..d310e39 --- /dev/null +++ b/target/linux/brcm2708/patches-4.1/0098-BCM270X_DT-Add-overlay-to-enable-uart1.patch @@ -0,0 +1,152 @@ +From 5131bc710dd79b98d12c08b2f22477f48fdbd0d3 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Fri, 26 Jun 2015 08:50:11 +0100 +Subject: [PATCH 098/121] BCM270X_DT: Add overlay to enable uart1 + +N.B. The UART1 clock is derived from the core clock. The firmware +will update clock-frequency if core_freq is set, but be aware +that unless force_turbo=1 while overclocking then the baud rate +will vary with ARM activity. +--- + arch/arm/boot/dts/bcm2708-rpi-b-plus.dts | 1 + + arch/arm/boot/dts/bcm2708-rpi-b.dts | 1 + + arch/arm/boot/dts/bcm2708-rpi-cm.dts | 1 + + arch/arm/boot/dts/bcm2709-rpi-2-b.dts | 1 + + arch/arm/boot/dts/overlays/Makefile | 1 + + arch/arm/boot/dts/overlays/README | 8 ++++++ + arch/arm/boot/dts/overlays/uart1-overlay.dts | 38 ++++++++++++++++++++++++++++ + arch/arm/configs/bcm2709_defconfig | 2 +- + arch/arm/configs/bcmrpi_defconfig | 2 +- + 9 files changed, 53 insertions(+), 2 deletions(-) + create mode 100644 arch/arm/boot/dts/overlays/uart1-overlay.dts + +--- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts ++++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts +@@ -103,6 +103,7 @@ + __overrides__ { + uart0 = <&uart0>,"status"; + uart0_clkrate = <&clk_uart0>,"clock-frequency:0"; ++ uart1_clkrate = <&uart1>,"clock-frequency:0"; + i2s = <&i2s>,"status"; + spi = <&spi0>,"status"; + i2c0 = <&i2c0>,"status"; +--- a/arch/arm/boot/dts/bcm2708-rpi-b.dts ++++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts +@@ -97,6 +97,7 @@ + __overrides__ { + uart0 = <&uart0>,"status"; + uart0_clkrate = <&clk_uart0>,"clock-frequency:0"; ++ uart1_clkrate = <&uart1>,"clock-frequency:0"; + i2s = <&i2s>,"status"; + spi = <&spi0>,"status"; + i2c0 = <&i2c0>,"status"; +--- a/arch/arm/boot/dts/bcm2708-rpi-cm.dts ++++ b/arch/arm/boot/dts/bcm2708-rpi-cm.dts +@@ -79,6 +79,7 @@ + __overrides__ { + uart0 = <&uart0>,"status"; + uart0_clkrate = <&clk_uart0>,"clock-frequency:0"; ++ uart1_clkrate = <&uart1>,"clock-frequency:0"; + i2s = <&i2s>,"status"; + spi = <&spi0>,"status"; + i2c0 = <&i2c0>,"status"; +--- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts ++++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts +@@ -103,6 +103,7 @@ + __overrides__ { + uart0 = <&uart0>,"status"; + uart0_clkrate = <&clk_uart0>,"clock-frequency:0"; ++ uart1_clkrate = <&uart1>,"clock-frequency:0"; + i2s = <&i2s>,"status"; + spi = <&spi0>,"status"; + i2c0 = <&i2c0>,"status"; +--- a/arch/arm/boot/dts/overlays/Makefile ++++ b/arch/arm/boot/dts/overlays/Makefile +@@ -42,6 +42,7 @@ dtb-$(RPI_DT_OVERLAYS) += sdhost-overlay + dtb-$(RPI_DT_OVERLAYS) += spi-bcm2708-overlay.dtb + dtb-$(RPI_DT_OVERLAYS) += spi-bcm2835-overlay.dtb + dtb-$(RPI_DT_OVERLAYS) += tinylcd35-overlay.dtb ++dtb-$(RPI_DT_OVERLAYS) += uart1-overlay.dtb + dtb-$(RPI_DT_OVERLAYS) += w1-gpio-overlay.dtb + dtb-$(RPI_DT_OVERLAYS) += w1-gpio-pullup-overlay.dtb + +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -489,6 +489,14 @@ Params: speed Display + dtoverlay=tinylcd35,touch,touchgpio=3 + + ++Name: uart1 ++Info: Enable uart1 in place of uart0 ++Load: dtoverlay=uart1,<param>=<val> ++Params: txd1_pin GPIO pin for TXD1 (14, 32 or 40 - default 14) ++ ++ rxd1_pin GPIO pin for RXD1 (15, 33 or 41 - default 15) ++ ++ + Name: w1-gpio + Info: Configures the w1-gpio Onewire interface module. + Use this overlay if you *don't* need a GPIO to drive an external pullup. +--- /dev/null ++++ b/arch/arm/boot/dts/overlays/uart1-overlay.dts +@@ -0,0 +1,38 @@ ++/dts-v1/; ++/plugin/; ++ ++/{ ++ compatible = "brcm,bcm2708"; ++ ++ fragment@0 { ++ target = <&uart1>; ++ __overlay__ { ++ pinctrl-names = "default"; ++ pinctrl-0 = <&uart1_pins>; ++ status = "okay"; ++ }; ++ }; ++ ++ fragment@1 { ++ target = <&gpio>; ++ __overlay__ { ++ uart1_pins: uart1_pins { ++ brcm,pins = <14 15>; ++ brcm,function = <2>; /* alt5 */ ++ brcm,pull = <0 2>; ++ }; ++ }; ++ }; ++ ++ fragment@2 { ++ target-path = "/chosen"; ++ __overlay__ { ++ bootargs = "8250.nr_uarts=1"; ++ }; ++ }; ++ ++ __overrides__ { ++ txd1_pin = <&uart1_pins>,"brcm,pins:0"; ++ rxd1_pin = <&uart1_pins>,"brcm,pins:4"; ++ }; ++}; +--- a/arch/arm/configs/bcm2709_defconfig ++++ b/arch/arm/configs/bcm2709_defconfig +@@ -562,7 +562,7 @@ CONFIG_SERIAL_8250=y + CONFIG_SERIAL_8250_CONSOLE=y + # CONFIG_SERIAL_8250_DMA is not set + CONFIG_SERIAL_8250_NR_UARTS=1 +-CONFIG_SERIAL_8250_RUNTIME_UARTS=1 ++CONFIG_SERIAL_8250_RUNTIME_UARTS=0 + CONFIG_SERIAL_AMBA_PL011=y + CONFIG_SERIAL_AMBA_PL011_CONSOLE=y + CONFIG_SERIAL_OF_PLATFORM=y +--- a/arch/arm/configs/bcmrpi_defconfig ++++ b/arch/arm/configs/bcmrpi_defconfig +@@ -555,7 +555,7 @@ CONFIG_SERIAL_8250=y + CONFIG_SERIAL_8250_CONSOLE=y + # CONFIG_SERIAL_8250_DMA is not set + CONFIG_SERIAL_8250_NR_UARTS=1 +-CONFIG_SERIAL_8250_RUNTIME_UARTS=1 ++CONFIG_SERIAL_8250_RUNTIME_UARTS=0 + CONFIG_SERIAL_AMBA_PL011=y + CONFIG_SERIAL_AMBA_PL011_CONSOLE=y + CONFIG_SERIAL_OF_PLATFORM=y |