From a9af65223b41cec60cd44fa95a93d10149deb143 Mon Sep 17 00:00:00 2001 From: Chanwoo Choi Date: Thu, 24 Apr 2014 19:46:49 +0900 Subject: extcon: Add extcon_dev_allocate/free() to control the memory of extcon device This patch add APIs to control the extcon device on extcon provider driver. The extcon_dev_allocate() allocates the memory of extcon device and initializes supported cables. And then extcon_dev_free() decrement the reference of the device of extcon device and free the memory of the extcon device. This APIs must need to implement devm_extcon_dev_allocate()/free() APIs. Signed-off-by: Chanwoo Choi Reviewed-by: Felipe Balbi --- drivers/extcon/extcon-class.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) (limited to 'drivers/extcon') diff --git a/drivers/extcon/extcon-class.c b/drivers/extcon/extcon-class.c index f6df68989651..654ed52e17c2 100644 --- a/drivers/extcon/extcon-class.c +++ b/drivers/extcon/extcon-class.c @@ -565,6 +565,42 @@ static void dummy_sysfs_dev_release(struct device *dev) { } +/* + * extcon_dev_allocate() - Allocate the memory of extcon device. + * @supported_cable: Array of supported cable names ending with NULL. + * If supported_cable is NULL, cable name related APIs + * are disabled. + * + * This function allocates the memory for extcon device without allocating + * memory in each extcon provider driver and initialize default setting for + * extcon device. + * + * Return the pointer of extcon device if success or ERR_PTR(err) if fail + */ +struct extcon_dev *extcon_dev_allocate(const char **supported_cable) +{ + struct extcon_dev *edev; + + edev = kzalloc(sizeof(*edev), GFP_KERNEL); + if (!edev) + return ERR_PTR(-ENOMEM); + + edev->max_supported = 0; + edev->supported_cable = supported_cable; + + return edev; +} + +/* + * extcon_dev_free() - Free the memory of extcon device. + * @edev: the extcon device to free + */ +void extcon_dev_free(struct extcon_dev *edev) +{ + kfree(edev); +} +EXPORT_SYMBOL_GPL(extcon_dev_free); + /** * extcon_dev_register() - Register a new extcon device * @edev : the new extcon device (should be allocated before calling) -- cgit v1.2.3-70-g09d2