Messages in this thread | | | Date | Mon, 3 Nov 2014 17:53:46 +0000 | From | Lee Jones <> | Subject | Re: [PATCH v3 19/47] mfd: rk808: Register power-off handler with kernel power-off handler |
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On Mon, 27 Oct 2014, 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: Chris Zhong <zyw@rock-chips.com> > Cc: Zhang Qing <zhangqing@rock-chips.com> > Signed-off-by: Guenter Roeck <linux@roeck-us.net> > --- > 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/rk808.c | 30 ++++++++++++++++-------------- > include/linux/mfd/rk808.h | 2 ++ > 2 files changed, 18 insertions(+), 14 deletions(-)
Code looks okay:
Acked-by: Lee Jones <lee.jones@linaro.org>
... but how are you thinking about handling this set?
> diff --git a/drivers/mfd/rk808.c b/drivers/mfd/rk808.c > index bd02150..5d5257d 100644 > --- a/drivers/mfd/rk808.c > +++ b/drivers/mfd/rk808.c > @@ -21,6 +21,8 @@ > #include <linux/mfd/rk808.h> > #include <linux/mfd/core.h> > #include <linux/module.h> > +#include <linux/notifier.h> > +#include <linux/pm.h> > #include <linux/regmap.h> > > struct rk808_reg_data { > @@ -147,23 +149,19 @@ static struct regmap_irq_chip rk808_irq_chip = { > .init_ack_masked = true, > }; > > -static struct i2c_client *rk808_i2c_client; > -static void rk808_device_shutdown(void) > +static int rk808_device_shutdown(struct notifier_block *this, > + unsigned long unused1, void *unused2) > { > + struct rk808 *rk808 = container_of(this, struct rk808, power_off_nb); > int ret; > - struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client); > - > - if (!rk808) { > - dev_warn(&rk808_i2c_client->dev, > - "have no rk808, so do nothing here\n"); > - return; > - } > > ret = regmap_update_bits(rk808->regmap, > RK808_DEVCTRL_REG, > DEV_OFF_RST, DEV_OFF_RST); > if (ret) > - dev_err(&rk808_i2c_client->dev, "power off error!\n"); > + dev_err(&rk808->i2c->dev, "power off error!\n"); > + > + return NOTIFY_DONE; > } > > static int rk808_probe(struct i2c_client *client, > @@ -222,9 +220,14 @@ static int rk808_probe(struct i2c_client *client, > > pm_off = of_property_read_bool(np, > "rockchip,system-power-controller"); > - if (pm_off && !pm_power_off) { > - rk808_i2c_client = client; > - pm_power_off = rk808_device_shutdown; > + if (pm_off) { > + rk808->power_off_nb.notifier_call = rk808_device_shutdown; > + rk808->power_off_nb.priority = POWER_OFF_PRIORITY_LOW; > + ret = devm_register_power_off_handler(&client->dev, > + &rk808->power_off_nb); > + if (ret) > + dev_warn(&client->dev, > + "Failed to register power-off handler\n"); > } > > return 0; > @@ -240,7 +243,6 @@ static int rk808_remove(struct i2c_client *client) > > regmap_del_irq_chip(client->irq, rk808->irq_data); > mfd_remove_devices(&client->dev); > - pm_power_off = NULL; > > return 0; > } > diff --git a/include/linux/mfd/rk808.h b/include/linux/mfd/rk808.h > index fb09312..6308fd4 100644 > --- a/include/linux/mfd/rk808.h > +++ b/include/linux/mfd/rk808.h > @@ -19,6 +19,7 @@ > #ifndef __LINUX_REGULATOR_rk808_H > #define __LINUX_REGULATOR_rk808_H > > +#include <linux/notifier.h> > #include <linux/regulator/machine.h> > #include <linux/regmap.h> > > @@ -192,5 +193,6 @@ struct rk808 { > struct i2c_client *i2c; > struct regmap_irq_chip_data *irq_data; > struct regmap *regmap; > + struct notifier_block power_off_nb; > }; > #endif /* __LINUX_REGULATOR_rk808_H */
-- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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