diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0566-overlays-Additional-parameters-for-gpio-poweroff.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0566-overlays-Additional-parameters-for-gpio-poweroff.patch | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0566-overlays-Additional-parameters-for-gpio-poweroff.patch b/target/linux/bcm27xx/patches-5.15/950-0566-overlays-Additional-parameters-for-gpio-poweroff.patch new file mode 100644 index 0000000000..e6c7b5fd15 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0566-overlays-Additional-parameters-for-gpio-poweroff.patch @@ -0,0 +1,50 @@ +From ae5bd19ff96560fb75a75c7d2374bed60bbd9669 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Thu, 11 Nov 2021 10:24:02 +0000 +Subject: [PATCH] overlays: Additional parameters for gpio-poweroff + +The gpio-poweroff driver supports active-delay-ms and inactive-delay-ms +properties. Add parameters to set these parameters - active_delay_ms +and inactive_delay_ms. + +See: https://forums.raspberrypi.com/viewtopic.php?t=323508 + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + arch/arm/boot/dts/overlays/README | 7 +++++++ + arch/arm/boot/dts/overlays/gpio-poweroff-overlay.dts | 2 ++ + 2 files changed, 9 insertions(+) + +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -1155,6 +1155,11 @@ Info: Drives a GPIO high or low on pow + or reboot). This also disables the ability to trigger a boot by driving + GPIO3 low. + ++ The GPIO starts in an inactive state. At poweroff time it is driven ++ active for 100ms, then inactive for 100ms, then active again. It is ++ safe to remove the power at any point after the initial activation of ++ the GPIO. ++ + Users of this overlay are required to provide an external mechanism to + switch off the power supply when signalled - failure to do so results + in a kernel BUG, increased power consumption and undefined behaviour. +@@ -1170,6 +1175,8 @@ Params: gpiopin GPIO for + input Set if the gpio pin should be configured as + an input. + export Set to export the configured pin to sysfs ++ active_delay_ms Initial GPIO active period (default 100) ++ inactive_delay_ms Subsequent GPIO inactive period (default 100) + timeout_ms Specify (in ms) how long the kernel waits for + power-down before issuing a WARN (default 3000). + +--- a/arch/arm/boot/dts/overlays/gpio-poweroff-overlay.dts ++++ b/arch/arm/boot/dts/overlays/gpio-poweroff-overlay.dts +@@ -33,5 +33,7 @@ + input = <&power_ctrl>,"input?"; + export = <&power_ctrl>,"export?"; + timeout_ms = <&power_ctrl>,"timeout-ms:0"; ++ active_delay_ms = <&power_ctrl>,"active-delay-ms:0"; ++ inactive_delay_ms = <&power_ctrl>,"inactive-delay-ms:0"; + }; + }; |