[PATCH v5 18/48] mfd: twl4030-power: Register with kernel power-off handler

Guenter Roeck
2014-11-06T16:44:35Z

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

Make twl4030_power_off static as it is only called from the twl4030-power
driver. Drop remove function as it is no longer needed.

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
- Use devm_register_power_off_handler
- Drop remove function as it is no longer needed.

drivers/mfd/twl4030-power.c | 25 +++++++++++++++----------
include/linux/i2c/twl.h | 1 -
2 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
index cf92a6d..88fd33c 100644
--- a/drivers/mfd/twl4030-power.c
+++ b/drivers/mfd/twl4030-power.c
@@ -25,9 +25,9 @@
*/

#include <linux/module.h>
-#include <linux/pm.h>
#include <linux/i2c/twl.h>
#include <linux/platform_device.h>
+#include <linux/pm.h>
#include <linux/of.h>
#include <linux/of_device.h>

@@ -611,7 +611,7 @@ twl4030_power_configure_resources(const struct twl4030_power_data *pdata)
* After a successful execution, TWL shuts down the power to the SoC
* and all peripherals connected to it.
*/
-void twl4030_power_off(void)
+static void twl4030_power_off(struct power_off_handler_block *this)
{
int err;

@@ -621,6 +621,11 @@ void twl4030_power_off(void)
pr_err("TWL4030 Unable to power off\n");
}

+static struct power_off_handler_block twl4030_power_off_hb = {
+ .handler = twl4030_power_off,
+ .priority = POWER_OFF_PRIORITY_LOW,
+};
+
static bool twl4030_power_use_poweroff(const struct twl4030_power_data *pdata,
struct device_node *node)
{
@@ -839,7 +844,9 @@ static int twl4030_power_probe(struct platform_device *pdev)
}

/* Board has to be wired properly to use this feature */
- if (twl4030_power_use_poweroff(pdata, node) && !pm_power_off) {
+ if (twl4030_power_use_poweroff(pdata, node)) {
+ int ret;
+
/* Default for SEQ_OFFSYNC is set, lets ensure this */
err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
TWL4030_PM_MASTER_CFG_P123_TRANSITION);
@@ -856,7 +863,11 @@ static int twl4030_power_probe(struct platform_device *pdev)
}
}

- pm_power_off = twl4030_power_off;
+ ret = devm_register_power_off_handler(&pdev->dev,
+ &twl4030_power_off_hb);
+ if (ret)
+ dev_warn(&pdev->dev,
+ "Failed to register power-off handler\n");
}

relock:
@@ -870,11 +881,6 @@ relock:
return err;
}

-static int twl4030_power_remove(struct platform_device *pdev)
-{
- return 0;
-}
-
static struct platform_driver twl4030_power_driver = {
.driver = {
.name = "twl4030_power",
@@ -882,7 +888,6 @@ static struct platform_driver twl4030_power_driver = {
.of_match_table = of_match_ptr(twl4030_power_of_match),
},
.probe = twl4030_power_probe,
- .remove = twl4030_power_remove,
};

module_platform_driver(twl4030_power_driver);
diff --git a/include/linux/i2c/twl.h b/include/linux/i2c/twl.h
index 8cfb50f..f8544f1 100644
--- a/include/linux/i2c/twl.h
+++ b/include/linux/i2c/twl.h
@@ -680,7 +680,6 @@ struct twl4030_power_data {
};

extern int twl4030_remove_script(u8 flags);
-extern void twl4030_power_off(void);

struct twl4030_codec_data {
unsigned int digimic_delay; /* in ms */
--
1.9.1