From 8ac0e95d6467ced054565312ecdf0a55a5333c64 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sat, 14 Apr 2012 09:14:34 +0800 Subject: [PATCH] regulator: core: Support setting suspend_[mode|voltage] if set_suspend_[en|dis]able is NULL In current implementation, to support set_suspend_voltage and set_suspend_mode the regulator code needs the regulator driver to implement both set_suspend_enable and set_suspend_disable callbacks. This patch removes this limitation. In the case set_suspend_enable and/or set_suspend_disable are NULL, the regulator code assumes we don't need to do any thing to enable/disable regulator when system is suspended and then will continue to handle set_suspend_mode and set_suspend_voltage. Currently the regulator core creates suspend state related sysfs entries only if both set_suspend_enable and set_suspend_disable callbacks are not NULL. A side-effect of this change is that the regulator core will create suspend state related sysfs entries unconditionally now. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/regulator/core.c | 27 +++++++++------------------ 1 file changed, 9 insertions(+), 18 deletions(-) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 713981b52f2a..5c0c975e5ac2 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -673,17 +673,14 @@ static int suspend_set_state(struct regulator_dev *rdev, struct regulator_state *rstate) { int ret = 0; - bool can_set_state; - - can_set_state = rdev->desc->ops->set_suspend_enable && - rdev->desc->ops->set_suspend_disable; /* If we have no suspend mode configration don't set anything; - * only warn if the driver actually makes the suspend mode - * configurable. + * only warn if the driver implements set_suspend_voltage or + * set_suspend_mode callback. */ if (!rstate->enabled && !rstate->disabled) { - if (can_set_state) + if (rdev->desc->ops->set_suspend_voltage || + rdev->desc->ops->set_suspend_mode) rdev_warn(rdev, "No configuration\n"); return 0; } @@ -693,15 +690,13 @@ static int suspend_set_state(struct regulator_dev *rdev, return -EINVAL; } - if (!can_set_state) { - rdev_err(rdev, "no way to set suspend state\n"); - return -EINVAL; - } - - if (rstate->enabled) + if (rstate->enabled && rdev->desc->ops->set_suspend_enable) ret = rdev->desc->ops->set_suspend_enable(rdev); - else + else if (rstate->disabled && rdev->desc->ops->set_suspend_disable) ret = rdev->desc->ops->set_suspend_disable(rdev); + else /* OK if set_suspend_enable or set_suspend_disable is NULL */ + ret = 0; + if (ret < 0) { rdev_err(rdev, "failed to enabled/disable\n"); return ret; @@ -2776,10 +2771,6 @@ static int add_regulator_attributes(struct regulator_dev *rdev) return status; } - /* suspend mode constraints need multiple supporting methods */ - if (!(ops->set_suspend_enable && ops->set_suspend_disable)) - return status; - status = device_create_file(dev, &dev_attr_suspend_standby_state); if (status < 0) return status; -- 2.20.1