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path: root/drivers/extcon/extcon-class.c
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2013-09-26Merge tag 'extcon-next-for-3.13' of ↵Greg Kroah-Hartman1-49/+46
git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon into char-misc-next Chanwoo writes: Update extcon for 3.13 This patchset modify extcon core to remove unnecessary allocation sequence for 'dev' instance and change extcon_dev_register() interface. extcon-gpio use gpiolib API to get debounce time and include small fix of extcon core/device driver. Detailed description for patchset: 1. Modify extcon core driver - The extcon-gpio driver use gpio_set_debounce() API provided from gpiolib if gpio driver for SoC support gpio_set_debounce() function and support 'gpio_ activ_low' filed to check whether gpio active state is 1(high) or 0(low). - Change field type of 'dev' in structure extcon_dev and remove the sequence of allocating memory of 'struct dev' on extcon_dev_register() function because extcon device must need 'struct device. - Change extcon_dev_register() prototype to simplify it and remove unnecessary parameter as below: 2. Fix coding style and typo - extcon core : Fix indentation coding style and remove unnecessary casting - extcon-max8997 : Fix checkpatch warning - extcon-max77693 : Fix checkpatch warning - extcon-arizona : Fix typo of comment and modify minor issue - extcon-palmas : Use dev_get_platdata() 3. Modify extcon-arizona driver - Modify minor issue about micbias and comparision statement
2013-09-27extcon: Simplify extcon_dev_register() prototype by removing unnecessary ↵Chanwoo Choi1-4/+7
parameter This patch remove extcon_dev_register()'s second parameter which means the pointer of parent device to simplify prototype of this function. So, if extcon device has the parent device, it should set the pointer of parent device to edev.dev.parent in extcon device driver instead of in extcon_dev_register(). Cc: Graeme Gregory <gg@slimlogic.co.uk> Cc: Kishon Vijay Abraham I <kishon@ti.com> Cc: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Cc: Mark Brown <broonie@kernel.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
2013-09-27extcon: Change field type of 'dev' in extcon_dev structureChanwoo Choi1-29/+23
The extcon device must always need 'struct device' so this patch change field type of 'dev' instead of allocating memory for 'struct device' on extcon_dev_register() function. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <cw00.choi@samsung.com>
2013-09-27extcon: Remove casting the return value which is a void pointerJingoo Han1-4/+4
Casting the return value which is a void pointer is redundant. The conversion from void pointer to any other pointer type is guaranteed by the C programming language. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
2013-09-27extcon: Fix indentation coding style to improve readabilityChanwoo Choi1-13/+13
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
2013-09-26extcon: class: Remove unnecessary extern declarationChanwoo Choi1-1/+0
This patch remove unnecessary extern declaration (extcon_set_state). checkpatch found this coding style issue. Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-26extcon: Fix up 80 column coding style issuesChanwoo Choi1-2/+4
This patch fix 80 column coding sytle issues by using checkpatch script. Cc: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Cc: Mark Brown <broonie@kernel.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-09-03Merge tag 'driver-core-3.12-rc1' of ↵Linus Torvalds1-5/+8
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core Pull driver core patches from Greg KH: "Here's the big driver core pull request for 3.12-rc1. Lots of tiny changes here fixing up the way sysfs attributes are created, to try to make drivers simpler, and fix a whole class race conditions with creations of device attributes after the device was announced to userspace. All the various pieces are acked by the different subsystem maintainers" * tag 'driver-core-3.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (119 commits) firmware loader: fix pending_fw_head list corruption drivers/base/memory.c: introduce help macro to_memory_block dynamic debug: line queries failing due to uninitialized local variable sysfs: sysfs_create_groups returns a value. debugfs: provide debugfs_create_x64() when disabled rbd: convert bus code to use bus_groups firmware: dcdbas: use binary attribute groups sysfs: add sysfs_create/remove_groups for when SYSFS is not enabled driver core: add #include <linux/sysfs.h> to core files. HID: convert bus code to use dev_groups Input: serio: convert bus code to use drv_groups Input: gameport: convert bus code to use drv_groups driver core: firmware: use __ATTR_RW() driver core: core: use DEVICE_ATTR_RO driver core: bus: use DRIVER_ATTR_WO() driver core: create write-only attribute macros for devices and drivers sysfs: create __ATTR_WO() driver-core: platform: convert bus code to use dev_groups workqueue: convert bus code to use dev_groups MEI: convert bus code to use dev_groups ...
2013-08-05extcon: Add an API to get extcon device from dt nodeKishon Vijay Abraham I1-1/+2
Added an API of_extcon_get_extcon_dev() to be used by drivers to get extcon device in the case of dt boot (this can be used instead of extcon_get_extcon_dev()). Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
2013-07-25extcon: convert extcon_class to use dev_groupsGreg Kroah-Hartman1-5/+8
The dev_attrs field of struct class is going away soon, dev_groups should be used instead. This converts the extcon_class code to use the correct field. Cc: MyungJoo Ham <myungjoo.ham@samsung.com> Acked-by: Chanwoo Choi<cw00.choi@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-07-03drivers: avoid format string in dev_set_nameKees Cook1-1/+1
Calling dev_set_name with a single paramter causes it to be handled as a format string. Many callers are passing potentially dynamic string content, so use "%s" in those cases to avoid any potential accidents, including wrappers like device_create*() and bdi_register(). Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-06-17extcon: add EXPORT_SYMBOL_GPL for exported functionsKishon Vijay Abraham I1-0/+2
Added EXPORT_SYMBOL_GPL() for extcon_register_interest and extcon_register_notifier in order to avoid undefined reference error when building the consumer modules of extcon as _modules_. Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-17extcon: Change permission 'state' sysfs entry (rw -> r)Chanwoo Choi1-22/+1
This patch change permission from read/write to only read. The specific process in the user-space couldn't change the state of cable when cable is attached or detached. - /sys/class/extcon/[devine name]/state Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-21extcon: Fix return value in extcon-class.cSachin Kamat1-1/+1
Return the value obtained from the function extcon_register_interest instead of -ENODEV. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
2012-10-23extcon : register for cable interest by cable nameJenny TC1-10/+34
There are some scnearios where a driver/framework needs to register interest for a particular cable without specifying the extcon device name. One such scenario is charger notifications. The platform will have charger cabel which will be bound to any extcon device. It's not mandatory for the charger driver to know which extcon device it should use. This patch enables the support for registering interest for a cable just by cable name wihtout specifying the extcon device name Signed-off-by: Jenny TC <jenny.tc@intel.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Tested-by: Chanwoo Choi <cw00.choi@samsung.com> -- Kernel-doc comment added by MyungJoo Ham
2012-10-23extcon: driver model release call not neededanish kumar1-40/+35
There was a case where free and list_del can be called twice on the same pointer.So fixed it by re-arranging the code and removing a function which was not needed. Signed-off-by: anish kumar <anish198519851985@gmail.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2012-10-23extcon: Fix kerneldoc for extcon_set_cable_state and extcon_set_cable_state_Axel Lin1-2/+2
Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
2012-10-23extcon: Fix return value in extcon_register_interest()Sachin Kamat1-1/+1
Propagate the value returned from extcon_find_cable_index() instead of -ENODEV. For readability, -EINVAL is returned in place of the variable. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
2012-10-23extcon: unregister compat link on cleanupPeter Huewe1-0/+4
Since extcon registers this compat link at device registration (extcon_dev_register), we should probably remove them at deregistration/cleanup. Cc: stable@vger.kernel.org Signed-off-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
2012-10-23extcon: Unregister compat class at module unload to fix oopsPeter Huewe1-0/+3
If you compile extcon with CONFIG_ANDROID and then load and unload the module you get a simple oops as the driver does not unregister its compat class and thus cannot register it again. Full trace: root@(none):~# modprobe extcon_class root@(none):~# rmmod extcon_class root@(none):~# modprobe extcon_class ------------[ cut here ]------------ WARNING: at fs/sysfs/dir.c:536 sysfs_add_one+0xde/0x100() sysfs: cannot create duplicate filename '/class/switch' Modules linked in: extcon_class(+) [last unloaded: extcon_class] Call Trace: 9f451a00: [<602a58bc>] printk+0x0/0xa8 9f451a18: [<60039b43>] warn_slowpath_common+0x93/0xd0 9f451a28: [<6012c6de>] sysfs_add_one+0xde/0x100 9f451a50: [<601d3d90>] strcat+0x0/0x40 9f451a68: [<60039cdc>] warn_slowpath_fmt+0x9c/0xa0 9f451a90: [<6002fe32>] unblock_signals+0x0/0x84 9f451ab0: [<60039c40>] warn_slowpath_fmt+0x0/0xa0 9f451ac0: [<6002fe32>] unblock_signals+0x0/0x84 9f451ae8: [<6012bd97>] sysfs_pathname.isra.10+0x57/0x70 9f451b00: [<601d3d90>] strcat+0x0/0x40 9f451b18: [<6012bd97>] sysfs_pathname.isra.10+0x57/0x70 9f451b48: [<6012c6de>] sysfs_add_one+0xde/0x100 9f451b78: [<6012c96f>] create_dir+0x8f/0x100 9f451bc0: [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class] 9f451bd8: [<6012cda6>] sysfs_create_dir+0xa6/0x1c0 9f451be8: [<601d89f1>] kvasprintf+0x81/0xa0 9f451bf8: [<601cf0f0>] kobject_get+0x0/0x50 9f451c18: [<601cf396>] kobject_add_internal+0x96/0x280 9f451c60: [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class] 9f451c78: [<601cfb93>] kobject_add+0xd3/0x140 9f451cc0: [<601cfac0>] kobject_add+0x0/0x140 9f451cd0: [<6002fe32>] unblock_signals+0x0/0x84 9f451cf8: [<6002fffc>] set_signals+0x29/0x3f 9f451d28: [<600c1de1>] kmem_cache_alloc+0xe1/0x100 9f451d78: [<601cffa0>] kobject_create_and_add+0x50/0xa0 9f451da8: [<601fbe76>] class_compat_register+0x56/0x80 9f451dc8: [<a085d118>] create_extcon_class+0x88/0xd0 [extcon_class] 9f451de8: [<a0861010>] extcon_class_init+0x10/0x12 [extcon_class] 9f451df8: [<600189a8>] do_one_initcall+0x48/0x1f0 9f451e20: [<60061920>] blocking_notifier_call_chain+0x0/0x20 9f451e30: [<60061920>] blocking_notifier_call_chain+0x0/0x20 9f451e58: [<6007e3c3>] sys_init_module+0xa3/0x280 9f451e88: [<6001e2ad>] handle_syscall+0x8d/0x90 9f451ea8: [<60033370>] userspace+0x405/0x531 9f451ee8: [<6001e380>] copy_chunk_to_user+0x0/0x40 9f451ef8: [<6001e5cd>] do_op_one_page+0x14d/0x220 9f451fd8: [<6001a355>] fork_handler+0x95/0xa0 ---[ end trace dd512cc03fe1c367 ]--- ------------[ cut here ]------------ WARNING: at lib/kobject.c:196 kobject_add_internal+0x26e/0x280() kobject_add_internal failed for switch with -EEXIST, don't try to register things with the same name in the same directory. Modules linked in: extcon_class(+) [last unloaded: extcon_class] Call Trace: 9f451ad0: [<602a58bc>] printk+0x0/0xa8 9f451ae8: [<60039b43>] warn_slowpath_common+0x93/0xd0 9f451af8: [<601cf56e>] kobject_add_internal+0x26e/0x280 9f451b18: [<601cf140>] kobject_put+0x0/0x70 9f451b20: [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class] 9f451b38: [<60039cdc>] warn_slowpath_fmt+0x9c/0xa0 9f451b88: [<60039c40>] warn_slowpath_fmt+0x0/0xa0 9f451bc0: [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class] 9f451bd8: [<6012cda6>] sysfs_create_dir+0xa6/0x1c0 9f451be8: [<601d89f1>] kvasprintf+0x81/0xa0 9f451bf8: [<601cf0f0>] kobject_get+0x0/0x50 9f451c18: [<601cf56e>] kobject_add_internal+0x26e/0x280 9f451c60: [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class] 9f451c78: [<601cfb93>] kobject_add+0xd3/0x140 9f451cc0: [<601cfac0>] kobject_add+0x0/0x140 9f451cd0: [<6002fe32>] unblock_signals+0x0/0x84 9f451cf8: [<6002fffc>] set_signals+0x29/0x3f 9f451d28: [<600c1de1>] kmem_cache_alloc+0xe1/0x100 9f451d78: [<601cffa0>] kobject_create_and_add+0x50/0xa0 9f451da8: [<601fbe76>] class_compat_register+0x56/0x80 9f451dc8: [<a085d118>] create_extcon_class+0x88/0xd0 [extcon_class] 9f451de8: [<a0861010>] extcon_class_init+0x10/0x12 [extcon_class] 9f451df8: [<600189a8>] do_one_initcall+0x48/0x1f0 9f451e20: [<60061920>] blocking_notifier_call_chain+0x0/0x20 9f451e30: [<60061920>] blocking_notifier_call_chain+0x0/0x20 9f451e58: [<6007e3c3>] sys_init_module+0xa3/0x280 9f451e88: [<6001e2ad>] handle_syscall+0x8d/0x90 9f451ea8: [<60033370>] userspace+0x405/0x531 9f451ee8: [<6001e380>] copy_chunk_to_user+0x0/0x40 9f451ef8: [<6001e5cd>] do_op_one_page+0x14d/0x220 9f451fd8: [<6001a355>] fork_handler+0x95/0xa0 ---[ end trace dd512cc03fe1c368 ]--- kobject_create_and_add: kobject_add error: -17 ------------[ cut here ]------------ WARNING: at drivers/extcon/extcon_class.c:545 create_extcon_class+0xbc/0xd0 [extcon_class]() cannot allocate Modules linked in: extcon_class(+) [last unloaded: extcon_class] Call Trace: 9f451c80: [<602a58bc>] printk+0x0/0xa8 9f451c98: [<60039b43>] warn_slowpath_common+0x93/0xd0 9f451ca0: [<6002fe32>] unblock_signals+0x0/0x84 9f451ca8: [<a085d14c>] create_extcon_class+0xbc/0xd0 [extcon_class] 9f451cd0: [<a0861000>] extcon_class_init+0x0/0x12 [extcon_class] 9f451ce8: [<60039cdc>] warn_slowpath_fmt+0x9c/0xa0 9f451d20: [<6002fe32>] unblock_signals+0x0/0x84 9f451d28: [<60039c40>] warn_slowpath_fmt+0x0/0xa0 9f451d48: [<6002fffc>] set_signals+0x29/0x3f 9f451d58: [<601cf172>] kobject_put+0x32/0x70 9f451d78: [<600c22c3>] kfree+0xb3/0x100 9f451da8: [<601fbe9a>] class_compat_register+0x7a/0x80 9f451dc8: [<a085d14c>] create_extcon_class+0xbc/0xd0 [extcon_class] 9f451de8: [<a0861010>] extcon_class_init+0x10/0x12 [extcon_class] 9f451df8: [<600189a8>] do_one_initcall+0x48/0x1f0 9f451e20: [<60061920>] blocking_notifier_call_chain+0x0/0x20 9f451e30: [<60061920>] blocking_notifier_call_chain+0x0/0x20 9f451e58: [<6007e3c3>] sys_init_module+0xa3/0x280 9f451e88: [<6001e2ad>] handle_syscall+0x8d/0x90 9f451ea8: [<60033370>] userspace+0x405/0x531 9f451ee8: [<6001e380>] copy_chunk_to_user+0x0/0x40 9f451ef8: [<6001e5cd>] do_op_one_page+0x14d/0x220 9f451fd8: [<6001a355>] fork_handler+0x95/0xa0 ---[ end trace dd512cc03fe1c369 ]--- FATAL: Error inserting extcon_class (/lib/modules/3.6.0-rc6-00178-g811315f/kernel/drivers/extcon/extcon_class.ko): Cannot allocate memory This patch fixes this. Cc: stable@vger.kernel.org Signed-off-by: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
2012-10-22extcon: optimising the check_mutually_exclusive functionanish kumar1-10/+6
Rather than re-inventing the wheel we can use the hamming function to calculate the number of bits set to check for violation of exclusivity. Signed-off-by: anish kumar <anish198519851985@gmail.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2012-10-22extcon: standard cable names definition and declaration changedanish kumar1-3/+1
With this change now individual drivers can use standard cable names as below: static const char *arizona_cable[] = { extcon_cable_name[EXTCON_USB], extcon_cable_name[EXTCON_USB_HOST], "CUSTOM_CABLE" NULL, } Signed-off-by: anish kumar <anish198519851985@gmail.com> Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
2012-09-05extcon: fixing typosPeter Meerwald1-4/+4
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16extcon: Ensure dynamically allocated sysfs attributes are initialisedMark Brown1-0/+4
The operation of lockdep requires that all dynamically allocated sysfs nodes are initialised using sysfs_attr_init() otherwise lots of warnings are generated. Ensure that all the dynamically allocated attributes that extcon generates have this done. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-08-16Extcon: renamed files to comply with the standard naming.MyungJoo Ham1-0/+832
Replaced '_' with '-' in the extcon file names, which has been bogging since new drivers have been using the standard naming. Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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