mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 17:18:59 +00:00
63 lines
3.2 KiB
Diff
63 lines
3.2 KiB
Diff
|
From 5f9fcc99c517a517e8d74ce001fc5bc2648f0e59 Mon Sep 17 00:00:00 2001
|
||
|
|
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
|
||
|
|
Date: Thu, 30 Apr 2020 19:41:10 +0200
|
||
|
|
Subject: [PATCH] overlays: gpio-shutdown: Add information for
|
||
|
|
Raspberry Pi 1 Model B rev 1
|
||
|
|
|
||
|
|
Raspberry Pi 1 Model B rev 1 uses GPIO1 for power-up instead of GPIO3.
|
||
|
|
---
|
||
|
|
arch/arm/boot/dts/overlays/README | 10 ++++++++--
|
||
|
|
arch/arm/boot/dts/overlays/gpio-shutdown-overlay.dts | 6 ++++--
|
||
|
|
2 files changed, 12 insertions(+), 4 deletions(-)
|
||
|
|
|
||
|
|
--- a/arch/arm/boot/dts/overlays/README
|
||
|
|
+++ b/arch/arm/boot/dts/overlays/README
|
||
|
|
@@ -883,9 +883,14 @@ Info: Initiates a shutdown when GPIO p
|
||
|
|
can be powered up again by driving GPIO3 low. The default
|
||
|
|
configuration uses GPIO3 with a pullup, so if you connect a
|
||
|
|
button between GPIO3 and GND (pin 5 and 6 on the 40-pin header),
|
||
|
|
- you get a shutdown and power-up button.
|
||
|
|
+ you get a shutdown and power-up button. Please note that
|
||
|
|
+ Raspberry Pi 1 Model B rev 1 uses GPIO1 instead of GPIO3.
|
||
|
|
Load: dtoverlay=gpio-shutdown,<param>=<val>
|
||
|
|
Params: gpio_pin GPIO pin to trigger on (default 3)
|
||
|
|
+ For Raspberry Pi 1 Model B rev 1 set this
|
||
|
|
+ explicitly to value 1, e.g.:
|
||
|
|
+
|
||
|
|
+ dtoverlay=gpio-shutdown,gpio_pin=1
|
||
|
|
|
||
|
|
active_low When this is 1 (active low), a falling
|
||
|
|
edge generates a key down event and a
|
||
|
|
@@ -897,7 +902,8 @@ Params: gpio_pin GPIO pin
|
||
|
|
Default is "up".
|
||
|
|
|
||
|
|
Note that the default pin (GPIO3) has an
|
||
|
|
- external pullup.
|
||
|
|
+ external pullup. Same applies for GPIO1
|
||
|
|
+ on Raspberry Pi 1 Model B rev 1.
|
||
|
|
|
||
|
|
debounce Specify the debounce interval in milliseconds
|
||
|
|
(default 100)
|
||
|
|
--- a/arch/arm/boot/dts/overlays/gpio-shutdown-overlay.dts
|
||
|
|
+++ b/arch/arm/boot/dts/overlays/gpio-shutdown-overlay.dts
|
||
|
|
@@ -4,7 +4,9 @@
|
||
|
|
|
||
|
|
// This overlay sets up an input device that generates KEY_POWER events
|
||
|
|
// when a given GPIO pin changes. It defaults to using GPIO3, which can
|
||
|
|
-// also be used to wake up (start) the Rpi again after shutdown. Since
|
||
|
|
+// also be used to wake up (start) the Rpi again after shutdown.
|
||
|
|
+// Raspberry Pi 1 Model B rev 1 can be wake up only by GPIO1 pin, so for
|
||
|
|
+// these boards change default GPIO pin to 1 via gpio_pin parameter. Since
|
||
|
|
// wakeup is active-low, this defaults to active-low with a pullup
|
||
|
|
// enabled, but all of this can be changed using overlay parameters (but
|
||
|
|
// note that GPIO3 has an external pullup on at least some boards).
|
||
|
|
@@ -71,7 +73,7 @@
|
||
|
|
|
||
|
|
// Allow changing the internal pullup/down state. 0 = none, 1 = pulldown, 2 = pullup
|
||
|
|
// Note that GPIO3 and GPIO2 are the I2c pins and have an external pullup (at least
|
||
|
|
- // on some boards).
|
||
|
|
+ // on some boards). Same applies for GPIO1 on Raspberry Pi 1 Model B rev 1.
|
||
|
|
gpio_pull = <&pin_state>,"brcm,pull:0";
|
||
|
|
|
||
|
|
// Allow setting the active_low flag. 0 = active high, 1 = active low
|