[PATCH 29/44] staging: nvec: Register with kernel poweroff handler

Guenter Roeck
2014-10-07T05:28:31Z

Register with kernel poweroff handler instead of setting pm_power_off
directly. Register with default priority value of 128 since we don't know
any better.

Cc: Julian Andres Klode <jak@jak-linux.org>
Cc: Marc Dietrich <marvin24@gmx.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
drivers/staging/nvec/nvec.c | 24 +++++++++++++++---------
drivers/staging/nvec/nvec.h | 2 ++
2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/nvec/nvec.c b/drivers/staging/nvec/nvec.c
index a93208a..33d406c 100644
--- a/drivers/staging/nvec/nvec.c
+++ b/drivers/staging/nvec/nvec.c
@@ -33,6 +33,7 @@
#include <linux/mfd/core.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
+#include <linux/pm.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
@@ -80,8 +81,6 @@ enum nvec_sleep_subcmds {
#define LID_SWITCH BIT(1)
#define PWR_BUTTON BIT(15)

-static struct nvec_chip *nvec_power_handle;
-
static const struct mfd_cell nvec_devices[] = {
{
.name = "nvec-kbd",
@@ -759,12 +758,17 @@ static void nvec_disable_i2c_slave(struct nvec_chip *nvec)
}
#endif

-static void nvec_power_off(void)
+static int nvec_power_off(struct notifier_block *this, unsigned long unused1,
+ void *unused2)
{
+ struct nvec_chip *nvec = container_of(this, struct nvec_chip,
+ poweroff_nb);
char ap_pwr_down[] = { NVEC_SLEEP, AP_PWR_DOWN };

- nvec_toggle_global_events(nvec_power_handle, false);
- nvec_write_async(nvec_power_handle, ap_pwr_down, 2);
+ nvec_toggle_global_events(nvec, false);
+ nvec_write_async(nvec, ap_pwr_down, 2);
+
+ return NOTIFY_DONE;
}

/*
@@ -878,8 +882,11 @@ static int tegra_nvec_probe(struct platform_device *pdev)
nvec->nvec_status_notifier.notifier_call = nvec_status_notifier;
nvec_register_notifier(nvec, &nvec->nvec_status_notifier, 0);

- nvec_power_handle = nvec;
- pm_power_off = nvec_power_off;
+ nvec->poweroff_nb.notifier_call = nvec_power_off;
+ nvec->poweroff_nb.priority = 128;
+ ret = register_poweroff_handler(&nvec->poweroff_nb);
+ if (ret)
+ dev_err(nvec->dev, "Failed to register poweroff handler\n");

/* Get Firmware Version */
msg = nvec_write_sync(nvec, get_firmware_version, 2);
@@ -914,13 +921,12 @@ static int tegra_nvec_remove(struct platform_device *pdev)
{
struct nvec_chip *nvec = platform_get_drvdata(pdev);

+ unregister_poweroff_handler(&nvec->poweroff_nb);
nvec_toggle_global_events(nvec, false);
mfd_remove_devices(nvec->dev);
nvec_unregister_notifier(nvec, &nvec->nvec_status_notifier);
cancel_work_sync(&nvec->rx_work);
cancel_work_sync(&nvec->tx_work);
- /* FIXME: needs check wether nvec is responsible for power off */
- pm_power_off = NULL;

return 0;
}
diff --git a/drivers/staging/nvec/nvec.h b/drivers/staging/nvec/nvec.h
index e271375..e5ee2af 100644
--- a/drivers/staging/nvec/nvec.h
+++ b/drivers/staging/nvec/nvec.h
@@ -163,6 +163,8 @@ struct nvec_chip {
struct nvec_msg *last_sync_msg;

int state;
+
+ struct notifier_block poweroff_nb;
};

extern int nvec_write_async(struct nvec_chip *nvec, const unsigned char *data,
--
1.9.1