diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0755-overlays-gpio-shutdown-Add-information-for-Raspberry.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0755-overlays-gpio-shutdown-Add-information-for-Raspberry.patch | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0755-overlays-gpio-shutdown-Add-information-for-Raspberry.patch b/target/linux/bcm27xx/patches-5.4/950-0755-overlays-gpio-shutdown-Add-information-for-Raspberry.patch new file mode 100644 index 0000000000..5bb6ee23ab --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0755-overlays-gpio-shutdown-Add-information-for-Raspberry.patch @@ -0,0 +1,62 @@ +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 |