[Xen-devel] [PATCH 15/44] mfd: dm355evm_msp: Register with kernel poweroff handler

[Guenter Roeck <linux@xxxxxxxxxxxx>]

Register with kernel poweroff handler instead of setting pm_power_off
directly. Register with a low priority value of 64 to reflect that
the original code only sets pm_power_off if it was not already set.

Cc: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
Cc: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
 drivers/mfd/dm355evm_msp.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/mfd/dm355evm_msp.c b/drivers/mfd/dm355evm_msp.c
index 4c826f7..52a82f3 100644
--- a/drivers/mfd/dm355evm_msp.c
+++ b/drivers/mfd/dm355evm_msp.c
@@ -14,6 +14,8 @@
 #include <linux/platform_device.h>
 #include <linux/clk.h>
 #include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/pm.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/leds.h>
@@ -352,14 +354,22 @@ static void dm355evm_command(unsigned command)
                                command, status);
 }
 
-static void dm355evm_power_off(void)
+static int dm355evm_power_off(struct notifier_block *this,
+                             unsigned long unused1, void *unused2)
 {
        dm355evm_command(MSP_COMMAND_POWEROFF);
+
+       return NOTIFY_DONE;
 }
 
+static struct notifier_block dm355evm_msp_poweroff_nb = {
+       .notifier_call = dm355evm_power_off,
+       .priority = 64,
+};
+
 static int dm355evm_msp_remove(struct i2c_client *client)
 {
-       pm_power_off = NULL;
+       unregister_poweroff_handler(&dm355evm_msp_poweroff_nb);
        msp430 = NULL;
        return 0;
 }
@@ -398,7 +408,9 @@ dm355evm_msp_probe(struct i2c_client *client, const struct 
i2c_device_id *id)
                goto fail;
 
        /* PM hookup */
-       pm_power_off = dm355evm_power_off;
+       status = register_poweroff_handler(&dm355evm_msp_poweroff_nb);
+       if (status)
+               dev_err(&client->dev, "Failed to register poweroff handler\n");
 
        return 0;
 
-- 
1.9.1


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