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authorDavid Lin <dtwlin@google.com>2016-07-12 17:41:21 -0700
committerGreg Kroah-Hartman <gregkh@google.com>2016-07-16 07:58:52 +0900
commit1f77b363bef417e28d8556a11c9a82f3e6cf24f0 (patch)
tree6fc4cc15c512e32c7fa762015c2c5b11c0ac42a5 /drivers/staging/greybus/arche-apb-ctrl.c
parent47becc556d4e8dc5bcd370100edebd6ad749b702 (diff)
greybus: hd: arche-platform: implement greybus shutdown
Implement platform driver shutdown callback to perform proper greybus shutdown so that the userspace unipro_shutdown service that shuts down the APB/SVC abruptly can be removed. The shutdown callback in arche-platform will first remove SVC so that all the Interface can be Deactivated in a sequence according to the spec before powering off the APB: Before: -> Arche/APB power off -> SoC power off After this patch: -> HD shutdown -> SVC shutdown -> Module shutdown -> Interface shutdown -> Bundle shutdown -> Arche/APB power off -> SoC power off Testing Done: - Observe all Interfaces are deactivated in the log during shutdown - Measure power off current and make sure no regression Signed-off-by: David Lin <dtwlin@google.com> Reviewed-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org> Reviewed-by: Johan Hovold <johan@hovoldconsulting.com> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers/staging/greybus/arche-apb-ctrl.c')
-rw-r--r--drivers/staging/greybus/arche-apb-ctrl.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/staging/greybus/arche-apb-ctrl.c b/drivers/staging/greybus/arche-apb-ctrl.c
index fce6a187ecfe..cae56fc0a6e5 100644
--- a/drivers/staging/greybus/arche-apb-ctrl.c
+++ b/drivers/staging/greybus/arche-apb-ctrl.c
@@ -444,6 +444,11 @@ static int arche_apb_ctrl_resume(struct device *dev)
return 0;
}
+static void arche_apb_ctrl_shutdown(struct platform_device *pdev)
+{
+ apb_ctrl_poweroff(&pdev->dev);
+}
+
static SIMPLE_DEV_PM_OPS(arche_apb_ctrl_pm_ops, arche_apb_ctrl_suspend,
arche_apb_ctrl_resume);
@@ -455,6 +460,7 @@ static struct of_device_id arche_apb_ctrl_of_match[] = {
static struct platform_driver arche_apb_ctrl_device_driver = {
.probe = arche_apb_ctrl_probe,
.remove = arche_apb_ctrl_remove,
+ .shutdown = arche_apb_ctrl_shutdown,
.driver = {
.name = "arche-apb-ctrl",
.pm = &arche_apb_ctrl_pm_ops,