target/linux/brcm2708/patches-4.4/0211-BCM270X_DT-Add-pi3-act-led-overlay.patch

   1 From 47e82ea7d35926f12bd642e1ad2727b9a128536a Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Wed, 23 Mar 2016 15:57:14 +0000
   4 Subject: [PATCH 211/423] BCM270X_DT: Add pi3-act-led overlay
   5
   6 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
   7 ---
   8  arch/arm/boot/dts/overlays/Makefile                |  1 +
   9  arch/arm/boot/dts/overlays/README                  | 19 +++++++++++++++
  10  arch/arm/boot/dts/overlays/pi3-act-led-overlay.dts | 27 ++++++++++++++++++++++
  11  3 files changed, 47 insertions(+)
  12  create mode 100644 arch/arm/boot/dts/overlays/pi3-act-led-overlay.dts
  13
  14 --- a/arch/arm/boot/dts/overlays/Makefile
  15 +++ b/arch/arm/boot/dts/overlays/Makefile
  16 @@ -39,6 +39,7 @@ dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can0.
  17  dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can1.dtbo
  18  dtbo-$(RPI_DT_OVERLAYS) += mmc.dtbo
  19  dtbo-$(RPI_DT_OVERLAYS) += mz61581.dtbo
  20 +dtbo-$(RPI_DT_OVERLAYS) += pi3-act-led.dtbo
  21  dtbo-$(RPI_DT_OVERLAYS) += pi3-disable-bt.dtbo
  22  dtbo-$(RPI_DT_OVERLAYS) += pi3-miniuart-bt.dtbo
  23  dtbo-$(RPI_DT_OVERLAYS) += piscreen.dtbo
  24 --- a/arch/arm/boot/dts/overlays/README
  25 +++ b/arch/arm/boot/dts/overlays/README
  26 @@ -136,12 +136,14 @@ Params:
  27
  28          act_led_activelow       Set to "on" to invert the sense of the LED
  29                                  (default "off")
  30 +                                N.B. For Pi3 see pi3-act-led overlay.
  31
  32          act_led_gpio            Set which GPIO to use for the activity LED
  33                                  (in case you want to connect it to an external
  34                                  device)
  35                                  (default "16" on a non-Plus board, "47" on a
  36                                  Plus or Pi 2)
  37 +                                N.B. For Pi3 see pi3-act-led overlay.
  38
  39          pwr_led_trigger
  40          pwr_led_activelow
  41 @@ -499,6 +501,23 @@ Params: speed                   Display
  42  [ The pcf8563-rtc overlay has been deleted. See i2c-rtc. ]
  43
  44
  45 +Name:   pi3-act-led
  46 +Info:   Pi3 uses a GPIO expander to drive the LEDs which can only be accessed
  47 +        from the VPU. There is a special driver for this with a separate DT
  48 +        node, which has the unfortunate consequence of breaking the
  49 +        act_led_gpio and act_led_activelow dtparams.
  50 +        This overlay changes the GPIO controller back to the standard one and
  51 +        restores the dtparams.
  52 +Load:   dtoverlay=pi3-act-led,<param>=<val>
  53 +Params: activelow               Set to "on" to invert the sense of the LED
  54 +                                (default "off")
  55 +
  56 +        gpio                    Set which GPIO to use for the activity LED
  57 +                                (in case you want to connect it to an external
  58 +                                device)
  59 +                                REQUIRED
  60 +
  61 +
  62  Name:   pi3-disable-bt
  63  Info:   Disable Pi3 Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15
  64          N.B. To disable the systemd service that initialises the modem so it
  65 --- /dev/null
  66 +++ b/arch/arm/boot/dts/overlays/pi3-act-led-overlay.dts
  67 @@ -0,0 +1,27 @@
  68 +/dts-v1/;
  69 +/plugin/;
  70 +
  71 +/* Pi3 uses a GPIO expander to drive the LEDs which can only be accessed
  72 +   from the VPU. There is a special driver for this with a separate DT node,
  73 +   which has the unfortunate consequence of breaking the act_led_gpio and
  74 +   act_led_activelow dtparams.
  75 +
  76 +   This overlay changes the GPIO controller back to the standard one and
  77 +   restores the dtparams.
  78 +*/
  79 +
  80 +/{
  81 +       compatible = "brcm,bcm2708";
  82 +
  83 +       fragment@0 {
  84 +               target = <&act_led>;
  85 +               frag0: __overlay__ {
  86 +                       gpios = <&gpio 0 0>;
  87 +               };
  88 +       };
  89 +
  90 +       __overrides__ {
  91 +               gpio = <&frag0>,"gpios:4";
  92 +               activelow = <&frag0>,"gpios:8";
  93 +       };
  94 +};