From mboxrd@z Thu Jan 1 00:00:00 1970 From: Guenter Roeck Subject: [PATCH v3 19/47] mfd: rk808: Register power-off handler with kernel power-off handler Date: Mon, 27 Oct 2014 08:55:26 -0700 Message-ID: <1414425354-10359-20-git-send-email-linux@roeck-us.net> References: <1414425354-10359-1-git-send-email-linux@roeck-us.net> Return-path: In-Reply-To: <1414425354-10359-1-git-send-email-linux@roeck-us.net> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org Cc: linux-pm@vger.kernel.org, Guenter Roeck , Chris Zhong , Zhang Qing , Lee Jones , Samuel Ortiz List-Id: linux-pm@vger.kernel.org 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 Cc: Zhang Qing Signed-off-by: Guenter Roeck --- 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(-) 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 #include #include +#include +#include #include 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 #include #include @@ -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 */ -- 1.9.1