[PATCH v3 17/47] mfd: tps65910: Register with kernel power-off handler

Felipe Balbi
2014-11-03T17:57:27Z

On Mon, Oct 27, 2014 at 08:55:24AM -0700, 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: Samuel Ortiz <sameo@linux.intel.com>
> Cc: Lee Jones <lee.jones@linaro.org>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

missed lakml and linux-omap here too

> ---
> 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 | 27 ++++++++++++++++++---------
> include/linux/mfd/tps65910.h | 3 +++
> 2 files changed, 21 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c
> index 7612d89..3c94dbf 100644
> --- a/drivers/mfd/tps65910.c
> +++ b/drivers/mfd/tps65910.c
> @@ -23,6 +23,8 @@
> #include <linux/irq.h>
> #include <linux/irqdomain.h>
> #include <linux/mfd/core.h>
> +#include <linux/notifier.h>
> +#include <linux/pm.h>
> #include <linux/regmap.h>
> #include <linux/mfd/tps65910.h>
> #include <linux/of.h>
> @@ -437,19 +439,20 @@ 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 int tps65910_power_off(struct notifier_block *this,
> + unsigned long unused1, void *unused2)
> {
> - struct tps65910 *tps65910;
> -
> - tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
> + struct tps65910 *tps65910 = container_of(this, struct tps65910,
> + power_off_nb);
>
> if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
> DEVCTRL_PWR_OFF_MASK) < 0)
> - return;
> + return NOTIFY_DONE;
>
> tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
> DEVCTRL_DEV_ON_MASK);
> +
> + return NOTIFY_DONE;
> }
>
> static int tps65910_i2c_probe(struct i2c_client *i2c,
> @@ -505,9 +508,13 @@ 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_nb.notifier_call = tps65910_power_off;
> + tps65910->power_off_nb.priority = POWER_OFF_PRIORITY_LOW;
> + ret = register_power_off_handler(&tps65910->power_off_nb);
> + if (ret)
> + dev_warn(&i2c->dev,
> + "failed to register power-off handler\n");
> }
>
> ret = mfd_add_devices(tps65910->dev, -1,
> @@ -527,6 +534,8 @@ static int tps65910_i2c_remove(struct i2c_client *i2c)
> {
> struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
>
> + unregister_power_off_handler(&tps65910->power_off_nb);
> +
> 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..94876c4 100644
> --- a/include/linux/mfd/tps65910.h
> +++ b/include/linux/mfd/tps65910.h
> @@ -905,6 +905,9 @@ struct tps65910 {
> /* IRQ Handling */
> int chip_irq;
> struct regmap_irq_chip_data *irq_data;
> +
> + /* Power-off handling */
> + struct notifier_block power_off_nb;
> };
>
> struct tps65910_platform_data {
> --
> 1.9.1
>
> --
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--
balbi
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