brcm2708: rename target to bcm27xx

This change makes the names of Broadcom targets consistent by using
the common notation based on SoC/CPU ID (which is used internally
anyway), bcmXXXX instead of brcmXXXX.
This is even used for target TITLE in make menuconfig already,
only the short target name used brcm so far.

Despite, since subtargets range from bcm2708 to bcm2711, it seems
appropriate to use bcm27xx instead of bcm2708 (again, as already done
for BOARDNAME).

This also renames the packages brcm2708-userland and brcm2708-gpu-fw.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-4.19/950-0253-gpio-ir-change-default-pull-configuration-to-up.patch b/target/linux/bcm27xx/patches-4.19/950-0253-gpio-ir-change-default-pull-configuration-to-up.patch
new file mode 100644
index 0000000000..40bfc01441
--- /dev/null
+++ b/target/linux/bcm27xx/patches-4.19/950-0253-gpio-ir-change-default-pull-configuration-to-up.patch
@@ -0,0 +1,47 @@
+From d1cf5fb57ee5ee4512a93614d67d15af9c8070b2 Mon Sep 17 00:00:00 2001
+From: Matthias Reichl <hias@horus.com>
+Date: Wed, 9 Jan 2019 14:51:01 +0100
+Subject: [PATCH] gpio-ir: change default pull configuration to up
+
+IR receivers like the TSOP series from Vishay and compatible ones
+have active-low open collector outputs with an internal pull up of
+about 30k (according to the TSOP datasheets).
+
+Activating a pull-down resistor on the GPIO will make it work against
+the pull-up in the IR receiver and brings the idle input voltage down
+to about 1.9V (measured on a RPi3B+ with a TSOP4438). While that's
+usually enough to make the RPi see a high signal it's certainly not
+optimal and may even fail when using an IR receiver with a weaker pull-up.
+
+Switching the default GPIO pull to "up" results in an input voltage
+level of about 3.3V and ensures that an idle state (high signal) will
+be detected if no IR receiver is attached.
+
+Signed-off-by: Matthias Reichl <hias@horus.com>
+---
+ arch/arm/boot/dts/overlays/README              | 2 +-
+ arch/arm/boot/dts/overlays/gpio-ir-overlay.dts | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -611,7 +611,7 @@ Load:   dtoverlay=gpio-ir,<param>=<val>
+ Params: gpio_pin                Input pin number. Default is 18.
+ 
+         gpio_pull               Desired pull-up/down state (off, down, up)
+-                                Default is "down".
++                                Default is "up".
+ 
+         rc-map-name             Default rc keymap (can also be changed by
+                                 ir-keytable), defaults to "rc-rc6-mce"
+--- a/arch/arm/boot/dts/overlays/gpio-ir-overlay.dts
++++ b/arch/arm/boot/dts/overlays/gpio-ir-overlay.dts
+@@ -30,7 +30,7 @@
+                         gpio_ir_pins: gpio_ir_pins@12 {
+                                 brcm,pins = <18>;                       // pin 18
+                                 brcm,function = <0>;                    // in
+-                                brcm,pull = <1>;                        // down
++                                brcm,pull = <2>;                        // up
+                         };
+                 };
+         };