mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 22:23:27 +00:00
58 lines
1.9 KiB
Diff
58 lines
1.9 KiB
Diff
|
From 03a2b2dc2c01a00838b83b6843c086230847239f Mon Sep 17 00:00:00 2001
|
||
|
|
From: Nick Bulleid <nedbulleid@fastmail.com>
|
||
|
|
Date: Thu, 10 May 2018 21:57:02 +0100
|
||
|
|
Subject: [PATCH] Add ability to export gpio used by gpio-poweroff
|
||
|
|
|
||
|
|
Signed-off-by: Nick Bulleid <nedbulleid@fastmail.com>
|
||
|
|
|
||
|
|
Added export feature to gpio-poweroff documentation
|
||
|
|
|
||
|
|
Signed-off-by: Nick Bulleid <nedbulleid@fastmail.com>
|
||
|
|
---
|
||
|
|
.../devicetree/bindings/power/reset/gpio-poweroff.txt | 1 +
|
||
|
|
drivers/power/reset/gpio-poweroff.c | 9 +++++++++
|
||
|
|
2 files changed, 10 insertions(+)
|
||
|
|
|
||
|
|
--- a/Documentation/devicetree/bindings/power/reset/gpio-poweroff.txt
|
||
|
|
+++ b/Documentation/devicetree/bindings/power/reset/gpio-poweroff.txt
|
||
|
|
@@ -31,6 +31,7 @@ Optional properties:
|
||
|
|
- inactive-delay-ms: Delay (default 100) to wait after driving gpio inactive
|
||
|
|
- timeout-ms: Time to wait before asserting a WARN_ON(1). If nothing is
|
||
|
|
specified, 3000 ms is used.
|
||
|
|
+- export : Export the GPIO line to the sysfs system
|
||
|
|
|
||
|
|
Examples:
|
||
|
|
|
||
|
|
--- a/drivers/power/reset/gpio-poweroff.c
|
||
|
|
+++ b/drivers/power/reset/gpio-poweroff.c
|
||
|
|
@@ -51,6 +51,7 @@ static int gpio_poweroff_probe(struct pl
|
||
|
|
bool input = false;
|
||
|
|
enum gpiod_flags flags;
|
||
|
|
bool force = false;
|
||
|
|
+ bool export = false;
|
||
|
|
|
||
|
|
/* If a pm_power_off function has already been added, leave it alone */
|
||
|
|
force = of_property_read_bool(pdev->dev.of_node, "force");
|
||
|
|
@@ -76,6 +77,12 @@ static int gpio_poweroff_probe(struct pl
|
||
|
|
if (IS_ERR(reset_gpio))
|
||
|
|
return PTR_ERR(reset_gpio);
|
||
|
|
|
||
|
|
+ export = of_property_read_bool(pdev->dev.of_node, "export");
|
||
|
|
+ if (export) {
|
||
|
|
+ gpiod_export(reset_gpio, false);
|
||
|
|
+ gpiod_export_link(&pdev->dev, "poweroff-gpio", reset_gpio);
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
pm_power_off = &gpio_poweroff_do_poweroff;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
@@ -85,6 +92,8 @@ static int gpio_poweroff_remove(struct p
|
||
|
|
if (pm_power_off == &gpio_poweroff_do_poweroff)
|
||
|
|
pm_power_off = NULL;
|
||
|
|
|
||
|
|
+ gpiod_unexport(reset_gpio);
|
||
|
|
+
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|