target/linux/brcm2708/patches-4.1/0098-BCM270X_DT-Add-overlay-to-enable-uart1.patch

   1 From dcbf44736f78f3c7899b4ab3ef6342a0c18dd767 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Fri, 26 Jun 2015 08:50:11 +0100
   4 Subject: [PATCH 098/222] BCM270X_DT: Add overlay to enable uart1
   5
   6 N.B. The UART1 clock is derived from the core clock. The firmware
   7 will update clock-frequency if core_freq is set, but be aware
   8 that unless force_turbo=1 while overclocking then the baud rate
   9 will vary with ARM activity.
  10 ---
  11  arch/arm/boot/dts/bcm2708-rpi-b-plus.dts     |  1 +
  12  arch/arm/boot/dts/bcm2708-rpi-b.dts          |  1 +
  13  arch/arm/boot/dts/bcm2708-rpi-cm.dts         |  1 +
  14  arch/arm/boot/dts/bcm2709-rpi-2-b.dts        |  1 +
  15  arch/arm/boot/dts/overlays/Makefile          |  1 +
  16  arch/arm/boot/dts/overlays/README            |  8 ++++++
  17  arch/arm/boot/dts/overlays/uart1-overlay.dts | 38 ++++++++++++++++++++++++++++
  18  arch/arm/configs/bcm2709_defconfig           |  2 +-
  19  arch/arm/configs/bcmrpi_defconfig            |  2 +-
  20  9 files changed, 53 insertions(+), 2 deletions(-)
  21  create mode 100644 arch/arm/boot/dts/overlays/uart1-overlay.dts
  22
  23 --- a/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
  24 +++ b/arch/arm/boot/dts/bcm2708-rpi-b-plus.dts
  25 @@ -103,6 +103,7 @@
  26         __overrides__ {
  27                 uart0 = <&uart0>,"status";
  28                 uart0_clkrate = <&clk_uart0>,"clock-frequency:0";
  29 +               uart1_clkrate = <&uart1>,"clock-frequency:0";
  30                 i2s = <&i2s>,"status";
  31                 spi = <&spi0>,"status";
  32                 i2c0 = <&i2c0>,"status";
  33 --- a/arch/arm/boot/dts/bcm2708-rpi-b.dts
  34 +++ b/arch/arm/boot/dts/bcm2708-rpi-b.dts
  35 @@ -97,6 +97,7 @@
  36         __overrides__ {
  37                 uart0 = <&uart0>,"status";
  38                 uart0_clkrate = <&clk_uart0>,"clock-frequency:0";
  39 +               uart1_clkrate = <&uart1>,"clock-frequency:0";
  40                 i2s = <&i2s>,"status";
  41                 spi = <&spi0>,"status";
  42                 i2c0 = <&i2c0>,"status";
  43 --- a/arch/arm/boot/dts/bcm2708-rpi-cm.dts
  44 +++ b/arch/arm/boot/dts/bcm2708-rpi-cm.dts
  45 @@ -79,6 +79,7 @@
  46         __overrides__ {
  47                 uart0 = <&uart0>,"status";
  48                 uart0_clkrate = <&clk_uart0>,"clock-frequency:0";
  49 +               uart1_clkrate = <&uart1>,"clock-frequency:0";
  50                 i2s = <&i2s>,"status";
  51                 spi = <&spi0>,"status";
  52                 i2c0 = <&i2c0>,"status";
  53 --- a/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
  54 +++ b/arch/arm/boot/dts/bcm2709-rpi-2-b.dts
  55 @@ -103,6 +103,7 @@
  56         __overrides__ {
  57                 uart0 = <&uart0>,"status";
  58                 uart0_clkrate = <&clk_uart0>,"clock-frequency:0";
  59 +               uart1_clkrate = <&uart1>,"clock-frequency:0";
  60                 i2s = <&i2s>,"status";
  61                 spi = <&spi0>,"status";
  62                 i2c0 = <&i2c0>,"status";
  63 --- a/arch/arm/boot/dts/overlays/Makefile
  64 +++ b/arch/arm/boot/dts/overlays/Makefile
  65 @@ -42,6 +42,7 @@ dtb-$(RPI_DT_OVERLAYS) += sdhost-overlay
  66  dtb-$(RPI_DT_OVERLAYS) += spi-bcm2708-overlay.dtb
  67  dtb-$(RPI_DT_OVERLAYS) += spi-bcm2835-overlay.dtb
  68  dtb-$(RPI_DT_OVERLAYS) += tinylcd35-overlay.dtb
  69 +dtb-$(RPI_DT_OVERLAYS) += uart1-overlay.dtb
  70  dtb-$(RPI_DT_OVERLAYS) += w1-gpio-overlay.dtb
  71  dtb-$(RPI_DT_OVERLAYS) += w1-gpio-pullup-overlay.dtb
  72
  73 --- a/arch/arm/boot/dts/overlays/README
  74 +++ b/arch/arm/boot/dts/overlays/README
  75 @@ -489,6 +489,14 @@ Params: speed                    Display
  76                  dtoverlay=tinylcd35,touch,touchgpio=3
  77
  78
  79 +Name:   uart1
  80 +Info:   Enable uart1 in place of uart0
  81 +Load:   dtoverlay=uart1,<param>=<val>
  82 +Params: txd1_pin                 GPIO pin for TXD1 (14, 32 or 40 - default 14)
  83 +
  84 +        rxd1_pin                 GPIO pin for RXD1 (15, 33 or 41 - default 15)
  85 +
  86 +
  87  Name:   w1-gpio
  88  Info:   Configures the w1-gpio Onewire interface module.
  89          Use this overlay if you *don't* need a GPIO to drive an external pullup.
  90 --- /dev/null
  91 +++ b/arch/arm/boot/dts/overlays/uart1-overlay.dts
  92 @@ -0,0 +1,38 @@
  93 +/dts-v1/;
  94 +/plugin/;
  95 +
  96 +/{
  97 +       compatible = "brcm,bcm2708";
  98 +
  99 +       fragment@0 {
 100 +               target = <&uart1>;
 101 +               __overlay__ {
 102 +                       pinctrl-names = "default";
 103 +                       pinctrl-0 = <&uart1_pins>;
 104 +                       status = "okay";
 105 +               };
 106 +       };
 107 +
 108 +       fragment@1 {
 109 +               target = <&gpio>;
 110 +               __overlay__ {
 111 +                       uart1_pins: uart1_pins {
 112 +                               brcm,pins = <14 15>;
 113 +                               brcm,function = <2>; /* alt5 */
 114 +                               brcm,pull = <0 2>;
 115 +                       };
 116 +               };
 117 +       };
 118 +
 119 +       fragment@2 {
 120 +               target-path = "/chosen";
 121 +               __overlay__ {
 122 +                       bootargs = "8250.nr_uarts=1";
 123 +               };
 124 +       };
 125 +
 126 +       __overrides__ {
 127 +               txd1_pin = <&uart1_pins>,"brcm,pins:0";
 128 +               rxd1_pin = <&uart1_pins>,"brcm,pins:4";
 129 +       };
 130 +};
 131 --- a/arch/arm/configs/bcm2709_defconfig
 132 +++ b/arch/arm/configs/bcm2709_defconfig
 133 @@ -562,7 +562,7 @@ CONFIG_SERIAL_8250=y
 134  CONFIG_SERIAL_8250_CONSOLE=y
 135  # CONFIG_SERIAL_8250_DMA is not set
 136  CONFIG_SERIAL_8250_NR_UARTS=1
 137 -CONFIG_SERIAL_8250_RUNTIME_UARTS=1
 138 +CONFIG_SERIAL_8250_RUNTIME_UARTS=0
 139  CONFIG_SERIAL_AMBA_PL011=y
 140  CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
 141  CONFIG_SERIAL_OF_PLATFORM=y
 142 --- a/arch/arm/configs/bcmrpi_defconfig
 143 +++ b/arch/arm/configs/bcmrpi_defconfig
 144 @@ -555,7 +555,7 @@ CONFIG_SERIAL_8250=y
 145  CONFIG_SERIAL_8250_CONSOLE=y
 146  # CONFIG_SERIAL_8250_DMA is not set
 147  CONFIG_SERIAL_8250_NR_UARTS=1
 148 -CONFIG_SERIAL_8250_RUNTIME_UARTS=1
 149 +CONFIG_SERIAL_8250_RUNTIME_UARTS=0
 150  CONFIG_SERIAL_AMBA_PL011=y
 151  CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
 152  CONFIG_SERIAL_OF_PLATFORM=y