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