[PATCH v5 17/48] mfd: tps65910: Register with kernel power-off handler

Guenter Roeck
2014-11-06T17:00:37Z

directly. Register with low priority to reflect that the original code
only sets pm_power_off if it was not already set.

Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: linux-omap@vger.kernel.org
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:
- Use define to specify poweroff handler priority
- Use dev_warn instead of dev_err

drivers/mfd/tps65910.c | 21 +++++++++++++--------
include/linux/mfd/tps65910.h | 4 ++++
2 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c
index 7612d89..b312b92 100644
--- a/drivers/mfd/tps65910.c
+++ b/drivers/mfd/tps65910.c
@@ -23,6 +23,7 @@
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/mfd/core.h>
+#include <linux/pm.h>
#include <linux/regmap.h>
#include <linux/mfd/tps65910.h>
#include <linux/of.h>
@@ -437,12 +438,10 @@ struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
}
#endif

-static struct i2c_client *tps65910_i2c_client;
-static void tps65910_power_off(void)
+static void tps65910_power_off(struct power_off_handler_block *this)
{
- struct tps65910 *tps65910;
-
- tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
+ struct tps65910 *tps65910 = container_of(this, struct tps65910,
+ power_off_hb);

if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
DEVCTRL_PWR_OFF_MASK) < 0)
@@ -505,9 +504,13 @@ static int tps65910_i2c_probe(struct i2c_client *i2c,
tps65910_ck32k_init(tps65910, pmic_plat_data);
tps65910_sleepinit(tps65910, pmic_plat_data);

- if (pmic_plat_data->pm_off && !pm_power_off) {
- tps65910_i2c_client = i2c;
- pm_power_off = tps65910_power_off;
+ if (pmic_plat_data->pm_off) {
+ tps65910->power_off_hb.handler = tps65910_power_off;
+ tps65910->power_off_hb.priority = POWER_OFF_PRIORITY_LOW;
+ ret = register_power_off_handler(&tps65910->power_off_hb);
+ if (ret)
+ dev_warn(&i2c->dev,
+ "failed to register power-off handler\n");
}

ret = mfd_add_devices(tps65910->dev, -1,
@@ -527,6 +530,8 @@ static int tps65910_i2c_remove(struct i2c_client *i2c)
{
struct tps65910 *tps65910 = i2c_get_clientdata(i2c);

+ unregister_power_off_handler(&tps65910->power_off_hb);
+
tps65910_irq_exit(tps65910);
mfd_remove_devices(tps65910->dev);

diff --git a/include/linux/mfd/tps65910.h b/include/linux/mfd/tps65910.h
index 6483a6f..a85ad0f 100644
--- a/include/linux/mfd/tps65910.h
+++ b/include/linux/mfd/tps65910.h
@@ -18,6 +18,7 @@
#define __LINUX_MFD_TPS65910_H

#include <linux/gpio.h>
+#include <linux/pm.h>
#include <linux/regmap.h>

/* TPS chip id list */
@@ -905,6 +906,9 @@ struct tps65910 {
/* IRQ Handling */
int chip_irq;
struct regmap_irq_chip_data *irq_data;
+
+ /* Power-off handling */
+ struct power_off_handler_block power_off_hb;
};

struct tps65910_platform_data {
--
1.9.1