From 222cc7b1cefbab1287ed5d5e3cce1f45aec60d39 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 22 Jun 2012 11:39:16 +0100 Subject: [PATCH] regulator: core: Allow multiple requests of a single supply mapping Sometimes it may be useful to allow a device to request a supply multiple times, for example in order to allow framework management of some uses of the supply with some additional driver specific management or in order to allow multiple children of an MFD to work with the supply. Currently this is not possible due to the creation of Solve this by removing the requested_uA entry (we have no current users of this feature anyway) and ignoring errors creating the symlink to the consumer. We should do something nicer than this as this causes sysfs to spew enormous warnings but it allows users to run for now. Signed-off-by: Mark Brown Acked-by: Liam Girdwood --- drivers/regulator/core.c | 49 ++++------------------------------------ 1 file changed, 5 insertions(+), 44 deletions(-) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 890fa5eb770..00c787c01f3 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -303,18 +303,6 @@ static int regulator_check_drms(struct regulator_dev *rdev) return 0; } -static ssize_t device_requested_uA_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct regulator *regulator; - - regulator = get_device_regulator(dev); - if (regulator == NULL) - return 0; - - return sprintf(buf, "%d\n", regulator->uA_load); -} - static ssize_t regulator_uV_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -1097,48 +1085,27 @@ static struct regulator *create_regulator(struct regulator_dev *rdev, list_add(®ulator->list, &rdev->consumer_list); if (dev) { - /* create a 'requested_microamps_name' sysfs entry */ - size = scnprintf(buf, REG_STR_SIZE, - "microamps_requested_%s-%s", - dev_name(dev), supply_name); - if (size >= REG_STR_SIZE) - goto overflow_err; - - regulator->dev = dev; - sysfs_attr_init(®ulator->dev_attr.attr); - regulator->dev_attr.attr.name = kstrdup(buf, GFP_KERNEL); - if (regulator->dev_attr.attr.name == NULL) - goto attr_name_err; - - regulator->dev_attr.attr.mode = 0444; - regulator->dev_attr.show = device_requested_uA_show; - err = device_create_file(dev, ®ulator->dev_attr); - if (err < 0) { - rdev_warn(rdev, "could not add regulator_dev requested microamps sysfs entry\n"); - goto attr_name_err; - } - - /* also add a link to the device sysfs entry */ + /* Add a link to the device sysfs entry */ size = scnprintf(buf, REG_STR_SIZE, "%s-%s", dev->kobj.name, supply_name); if (size >= REG_STR_SIZE) - goto attr_err; + goto overflow_err; regulator->supply_name = kstrdup(buf, GFP_KERNEL); if (regulator->supply_name == NULL) - goto attr_err; + goto overflow_err; err = sysfs_create_link(&rdev->dev.kobj, &dev->kobj, buf); if (err) { rdev_warn(rdev, "could not add device link %s err %d\n", dev->kobj.name, err); - goto link_name_err; + /* non-fatal */ } } else { regulator->supply_name = kstrdup(supply_name, GFP_KERNEL); if (regulator->supply_name == NULL) - goto attr_err; + goto overflow_err; } regulator->debugfs = debugfs_create_dir(regulator->supply_name, @@ -1165,12 +1132,6 @@ static struct regulator *create_regulator(struct regulator_dev *rdev, mutex_unlock(&rdev->mutex); return regulator; -link_name_err: - kfree(regulator->supply_name); -attr_err: - device_remove_file(regulator->dev, ®ulator->dev_attr); -attr_name_err: - kfree(regulator->dev_attr.attr.name); overflow_err: list_del(®ulator->list); kfree(regulator); -- 2.41.0