diff mbox

[v5,20/48] mfd: rn5t618: Register power-off handler with kernel power-off handler

Message ID 1415292213-28652-21-git-send-email-linux@roeck-us.net (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Guenter Roeck Nov. 6, 2014, 4:43 p.m. UTC
Register with kernel power-off handler instead of setting pm_power_off
directly. Register with low priority to reflect that the original code
only sets pm_power_off if it was not already set.

Cc: Beniamino Galvani <b.galvani@gmail.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
v5:
- Rebase to v3.18-rc3
v4:
- Do not use notifiers but internal functions and data structures to manage
  the list of power-off handlers. Drop unused parameters from callbacks, and
  make the power-off function type void
v3:
- Replace poweroff in all newly introduced variables and in text
  with power_off or power-off as appropriate
- Replace POWEROFF_PRIORITY_xxx with POWER_OFF_PRIORITY_xxx
v2:
- New patch

 drivers/mfd/rn5t618.c       | 28 ++++++++++++----------------
 include/linux/mfd/rn5t618.h |  2 ++
 2 files changed, 14 insertions(+), 16 deletions(-)

Comments

Beniamino Galvani Nov. 7, 2014, 9 p.m. UTC | #1
On Thu, Nov 06, 2014 at 08:43:04AM -0800, Guenter Roeck wrote:
> Register with kernel power-off handler instead of setting pm_power_off
> directly. Register with low priority to reflect that the original code
> only sets pm_power_off if it was not already set.
> 
> Cc: Beniamino Galvani <b.galvani@gmail.com>
> Acked-by: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
> ---
> v5:
> - Rebase to v3.18-rc3
> v4:
> - Do not use notifiers but internal functions and data structures to manage
>   the list of power-off handlers. Drop unused parameters from callbacks, and
>   make the power-off function type void
> v3:
> - Replace poweroff in all newly introduced variables and in text
>   with power_off or power-off as appropriate
> - Replace POWEROFF_PRIORITY_xxx with POWER_OFF_PRIORITY_xxx
> v2:
> - New patch
> 
>  drivers/mfd/rn5t618.c       | 28 ++++++++++++----------------
>  include/linux/mfd/rn5t618.h |  2 ++
>  2 files changed, 14 insertions(+), 16 deletions(-)

Tested-by: Beniamino Galvani <b.galvani@gmail.com>
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Guenter Roeck Nov. 8, 2014, 4:19 a.m. UTC | #2
On 11/07/2014 01:00 PM, Beniamino Galvani wrote:
> On Thu, Nov 06, 2014 at 08:43:04AM -0800, Guenter Roeck wrote:
>> Register with kernel power-off handler instead of setting pm_power_off
>> directly. Register with low priority to reflect that the original code
>> only sets pm_power_off if it was not already set.
>>
>> Cc: Beniamino Galvani <b.galvani@gmail.com>
>> Acked-by: Lee Jones <lee.jones@linaro.org>
>> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
>> ---
>> v5:
>> - Rebase to v3.18-rc3
>> v4:
>> - Do not use notifiers but internal functions and data structures to manage
>>    the list of power-off handlers. Drop unused parameters from callbacks, and
>>    make the power-off function type void
>> v3:
>> - Replace poweroff in all newly introduced variables and in text
>>    with power_off or power-off as appropriate
>> - Replace POWEROFF_PRIORITY_xxx with POWER_OFF_PRIORITY_xxx
>> v2:
>> - New patch
>>
>>   drivers/mfd/rn5t618.c       | 28 ++++++++++++----------------
>>   include/linux/mfd/rn5t618.h |  2 ++
>>   2 files changed, 14 insertions(+), 16 deletions(-)
>
> Tested-by: Beniamino Galvani <b.galvani@gmail.com>
>
Thanks!

Guenter

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diff mbox

Patch

diff --git a/drivers/mfd/rn5t618.c b/drivers/mfd/rn5t618.c
index 6668571..1492025 100644
--- a/drivers/mfd/rn5t618.c
+++ b/drivers/mfd/rn5t618.c
@@ -15,6 +15,7 @@ 
 #include <linux/mfd/core.h>
 #include <linux/mfd/rn5t618.h>
 #include <linux/module.h>
+#include <linux/pm.h>
 #include <linux/regmap.h>
 
 static const struct mfd_cell rn5t618_cells[] = {
@@ -47,15 +48,16 @@  static const struct regmap_config rn5t618_regmap_config = {
 	.cache_type	= REGCACHE_RBTREE,
 };
 
-static struct rn5t618 *rn5t618_pm_power_off;
-
-static void rn5t618_power_off(void)
+static void rn5t618_power_off(struct power_off_handler_block *this)
 {
+	struct rn5t618 *rn5t618 = container_of(this, struct rn5t618,
+					       power_off_hb);
+
 	/* disable automatic repower-on */
-	regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_REPCNT,
+	regmap_update_bits(rn5t618->regmap, RN5T618_REPCNT,
 			   RN5T618_REPCNT_REPWRON, 0);
 	/* start power-off sequence */
-	regmap_update_bits(rn5t618_pm_power_off->regmap, RN5T618_SLPCNT,
+	regmap_update_bits(rn5t618->regmap, RN5T618_SLPCNT,
 			   RN5T618_SLPCNT_SWPWROFF, RN5T618_SLPCNT_SWPWROFF);
 }
 
@@ -85,23 +87,17 @@  static int rn5t618_i2c_probe(struct i2c_client *i2c,
 		return ret;
 	}
 
-	if (!pm_power_off) {
-		rn5t618_pm_power_off = priv;
-		pm_power_off = rn5t618_power_off;
-	}
+	priv->power_off_hb.handler = rn5t618_power_off;
+	priv->power_off_hb.priority = POWER_OFF_PRIORITY_LOW;
+	ret = devm_register_power_off_handler(&i2c->dev, &priv->power_off_hb);
+	if (ret)
+		dev_warn(&i2c->dev, "Failed to register power-off handler\n");
 
 	return 0;
 }
 
 static int rn5t618_i2c_remove(struct i2c_client *i2c)
 {
-	struct rn5t618 *priv = i2c_get_clientdata(i2c);
-
-	if (priv == rn5t618_pm_power_off) {
-		rn5t618_pm_power_off = NULL;
-		pm_power_off = NULL;
-	}
-
 	mfd_remove_devices(&i2c->dev);
 	return 0;
 }
diff --git a/include/linux/mfd/rn5t618.h b/include/linux/mfd/rn5t618.h
index c72d534..87e34b3 100644
--- a/include/linux/mfd/rn5t618.h
+++ b/include/linux/mfd/rn5t618.h
@@ -14,6 +14,7 @@ 
 #ifndef __LINUX_MFD_RN5T618_H
 #define __LINUX_MFD_RN5T618_H
 
+#include <linux/pm.h>
 #include <linux/regmap.h>
 
 #define RN5T618_LSIVER			0x00
@@ -223,6 +224,7 @@  enum {
 
 struct rn5t618 {
 	struct regmap *regmap;
+	struct power_off_handler_block power_off_hb;
 };
 
 #endif /* __LINUX_MFD_RN5T618_H */