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path: root/drivers/power/lp8727_charger.c
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2016-08-11power: move power supply drivers to power/supplySebastian Reichel1-631/+0
This moves all power supply drivers from drivers/power/ to drivers/power/supply/. The intention is a cleaner source tree, since drivers/power/ also contains frameworks unrelated to power supply, like adaptive voltage scaling. Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-09-22power:lp8727_charger: parsing child node after getting debounce-msMilo Kim1-4/+4
According to lp8727 bindings[*], charging parameter is optional. So parsing can be skipped in case those properties are undefined. However, 'debounce-ms' should be read prior to checking the properties. Otherwise, 'debounce-ms' property will be ignored even it is configured inside the DT. So, counting child is processed after updating 'debounce-ms'. [*] Documentation/devicetree/bindings/power_supply/lp8727_charger.txt Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Milo Kim <milo.kim@ti.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-09-22power:lp8727_charger: use the private data instead of updating I2C device ↵Milo Kim1-12/+13
platform data Currently, lp8727 charger driver parses the DT and copies values into the 'cl->dev.platform_data' if 'of_node' exists. This may have architectural issue. Platform data is configurable through the DT or I2C board info inside the platform area. However, lp8727 driver changes this configuration when it is loaded. The driver should get data from the platform side and use the private data, 'lp8727_chg->pdata' instead of changing the original platform data. _probe() procedure is changed as follows. 1. lp8727_parse_dt() returns the pointer of lp8727_platform_data. The driver uses this allocated platform data. So it should keep original platform data, 'dev->platform_data'. 2. In _probe(), check the return value of lp8727_parse_dt(). If an error is found, then exit as PTR_ERR(pdata). 3. If 'of_node' is not found, then the driver just gets the platform data from the I2C device structure. 4. Map the platform data to private data structure. Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Milo Kim <milo.kim@ti.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-13power_supply: Change ownership from driver to coreKrzysztof Kozlowski1-39/+49
Change the ownership of power_supply structure from each driver implementing the class to the power supply core. The patch changes power_supply_register() function thus all drivers implementing power supply class are adjusted. Each driver provides the implementation of power supply. However it should not be the owner of power supply class instance because it is exposed by core to other subsystems with power_supply_get_by_name(). These other subsystems have no knowledge when the driver will unregister the power supply. This leads to several issues when driver is unbound - mostly because user of power supply accesses freed memory. Instead let the core own the instance of struct 'power_supply'. Other users of this power supply will still access valid memory because it will be freed when device reference count reaches 0. Currently this means "it will leak" but power_supply_put() call in next patches will solve it. This solves invalid memory references in following race condition scenario: Thread 1: charger manager Thread 2: power supply driver, used by charger manager THREAD 1 (charger manager) THREAD 2 (power supply driver) ========================== ============================== psy = power_supply_get_by_name() Driver unbind, .remove power_supply_unregister() Device fully removed psy->get_property() The 'get_property' call is executed in invalid context because the driver was unbound and struct 'power_supply' memory was freed. This could be observed easily with charger manager driver (here compiled with max17040 fuel gauge): $ cat /sys/devices/virtual/power_supply/cm-battery/capacity & $ echo "1-0036" > /sys/bus/i2c/drivers/max17040/unbind [ 55.725123] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 55.732584] pgd = d98d4000 [ 55.734060] [00000000] *pgd=5afa2831, *pte=00000000, *ppte=00000000 [ 55.740318] Internal error: Oops: 80000007 [#1] PREEMPT SMP ARM [ 55.746210] Modules linked in: [ 55.749259] CPU: 1 PID: 2936 Comm: cat Tainted: G W 3.19.0-rc1-next-20141226-00048-gf79f475f3c44-dirty #1496 [ 55.760190] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 55.766270] task: d9b76f00 ti: daf54000 task.ti: daf54000 [ 55.771647] PC is at 0x0 [ 55.774182] LR is at charger_get_property+0x2f4/0x36c [ 55.779201] pc : [<00000000>] lr : [<c034b0b4>] psr: 60000013 [ 55.779201] sp : daf55e90 ip : 00000003 fp : 00000000 [ 55.790657] r10: 00000000 r9 : c06e2878 r8 : d9b26c68 [ 55.795865] r7 : dad81610 r6 : daec7410 r5 : daf55ebc r4 : 00000000 [ 55.802367] r3 : 00000000 r2 : daf55ebc r1 : 0000002a r0 : d9b26c68 [ 55.808879] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user [ 55.815994] Control: 10c5387d Table: 598d406a DAC: 00000015 [ 55.821723] Process cat (pid: 2936, stack limit = 0xdaf54210) [ 55.827451] Stack: (0xdaf55e90 to 0xdaf56000) [ 55.831795] 5e80: 60000013 c01459c4 0000002a c06f8ef8 [ 55.839956] 5ea0: db651000 c06f8ef8 daebac00 c04cb668 daebac08 c0346864 00000000 c01459c4 [ 55.848115] 5ec0: d99eaa80 c06f8ef8 00000fff 00001000 db651000 c027f25c c027f240 d99eaa80 [ 55.856274] 5ee0: d9a06c00 c0146218 daf55f18 00001000 d99eaa80 db4c18c0 00000001 00000001 [ 55.864468] 5f00: daf55f80 c0144c78 c0144c54 c0107f90 00015000 d99eaab0 00000000 00000000 [ 55.872603] 5f20: 000051c7 00000000 db4c18c0 c04a9370 00015000 00001000 daf55f80 00001000 [ 55.880763] 5f40: daf54000 00015000 00000000 c00e53dc db4c18c0 c00e548c 0000000d 00008124 [ 55.888937] 5f60: 00000001 00000000 00000000 db4c18c0 db4c18c0 00001000 00015000 c00e5550 [ 55.897099] 5f80: 00000000 00000000 00001000 00001000 00015000 00000003 00000003 c000f364 [ 55.905239] 5fa0: 00000000 c000f1a0 00001000 00015000 00000003 00015000 00001000 0001333c [ 55.913399] 5fc0: 00001000 00015000 00000003 00000003 00000002 00000000 00000000 00000000 [ 55.921560] 5fe0: 7fffe000 be999850 0000a225 b6f3c19c 60000010 00000003 00000000 00000000 [ 55.929744] [<c034b0b4>] (charger_get_property) from [<c0346864>] (power_supply_show_property+0x48/0x20c) [ 55.939286] [<c0346864>] (power_supply_show_property) from [<c027f25c>] (dev_attr_show+0x1c/0x48) [ 55.948130] [<c027f25c>] (dev_attr_show) from [<c0146218>] (sysfs_kf_seq_show+0x84/0x104) [ 55.956298] [<c0146218>] (sysfs_kf_seq_show) from [<c0144c78>] (kernfs_seq_show+0x24/0x28) [ 55.964536] [<c0144c78>] (kernfs_seq_show) from [<c0107f90>] (seq_read+0x1b0/0x484) [ 55.972172] [<c0107f90>] (seq_read) from [<c00e53dc>] (__vfs_read+0x18/0x4c) [ 55.979188] [<c00e53dc>] (__vfs_read) from [<c00e548c>] (vfs_read+0x7c/0x100) [ 55.986304] [<c00e548c>] (vfs_read) from [<c00e5550>] (SyS_read+0x40/0x8c) [ 55.993164] [<c00e5550>] (SyS_read) from [<c000f1a0>] (ret_fast_syscall+0x0/0x48) [ 56.000626] Code: bad PC value [ 56.011652] ---[ end trace 7b64343fbdae8ef1 ]--- Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for compal-laptop.c] Acked-by: Darren Hart <dvhart@linux.intel.com> [for the mfd part] Acked-by: Lee Jones <lee.jones@linaro.org> [for the hid part] Acked-by: Jiri Kosina <jkosina@suse.cz> [for the acpi part] Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2015-03-13power_supply: Move run-time configuration to separate structureKrzysztof Kozlowski1-7/+7
Add new structure 'power_supply_config' for holding run-time initialization data like of_node, supplies and private driver data. The power_supply_register() function is changed so all power supply drivers need updating. When registering the power supply this new 'power_supply_config' should be used instead of directly initializing 'struct power_supply'. This allows changing the ownership of power_supply structure from driver to the power supply core in next patches. When a driver does not use of_node or supplies then it should use NULL as config. If driver uses of_node or supplies then it should allocate config on stack and initialize it with proper values. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Acked-by: Pavel Machek <pavel@ucw.cz> [for the nvec part] Reviewed-by: Marc Dietrich <marvin24@gmx.de> [for drivers/platform/x86/compal-laptop.c] Reviewed-by: Darren Hart <dvhart@linux.intel.com> [for drivers/hid/*] Reviewed-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Sebastian Reichel <sre@kernel.org>
2013-06-06lp8727_charger: Support the device tree featureKim, Milo1-0/+68
The interrupt and charging parameters are configurable in the device tree structure. In the board test, a GPIO is used for handling LP8727 interrupts. The device tree binding documentation is added also. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton@enomsg.org>
2013-02-02lp8727_charger: Small cleanup in namingDan Carpenter1-4/+4
"pdata" and "pchg->pdata" are the same. Changing the function call to pdata->get_batt_present() makes it match the check and it's a little cleaner. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Milo Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton@enomsg.org>
2012-11-28power: remove use of __devexitBill Pemberton1-1/+1
CONFIG_HOTPLUG is going away as an option so __devexit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Anton Vorontsov <cbou@mail.ru> Cc: David Woodhouse <dwmw2@infradead.org> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28power: remove use of __devexit_pBill Pemberton1-1/+1
CONFIG_HOTPLUG is going away as an option so __devexit_p is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Anton Vorontsov <cbou@mail.ru> Cc: David Woodhouse <dwmw2@infradead.org> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-09-20lp8727_charger: More pure cosmetic improvementsKim, Milo1-1/+2
This is really minor, but it improves the readability. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Fix checkpatch warningKim, Milo1-2/+1
Fix the warning on MODULE_AUTHOR. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Add description in the private dataKim, Milo1-4/+8
Add description and relocate data. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Fix a typo - chg_parm to chg_paramKim, Milo1-8/+8
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Make some cosmetic changes in lp8727_delayed_func()Kim, Milo1-3/+5
Declare a variable at one line and align lines. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Clean up lp8727_charger_changed()Kim, Milo1-9/+13
Declare a variable at one line. Just return when no charger exists to make code simpler. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Return if the battery is dischargingKim, Milo1-6/+7
If the charger is pulled out, just return as DISCHARGING. Then no need for additional 'else' statement. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Make lp8727_charger_get_propery() simplerKim, Milo1-3/+4
Charger has only one valid property - ONLINE. If the property is not ONLINE, then just return quickly. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Make lp8727_ctrl_switch() inlineKim, Milo1-1/+1
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Make lp8727_init_device() shorterKim, Milo1-5/+1
Just return with lp8727_write_byte(), no need to check its value. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Clean up lp8727_is_charger_attached()Kim, Milo1-8/+6
Change return type to boolean. Remove unnecessary check routine for NULL string. (Power supply name is always valid when the function is executed.) Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Use specific definitionKim, Milo1-3/+6
Add new LP8727_ICHG_SHIFT definition and replace a magic number. Reuse definition for the size of interrupt register buffer. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Clean up lp8727 definitionsKim, Milo1-66/+64
All definitions should be unique, since they're in the gloabl namespace. So the prefix LP8727_ are added. Additionally, use BIT() macro for bit masks. Remove unnecessary definitions such as SW_DM1_U1 and SW_DP2_U2. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Use the definition rather than enumKim, Milo1-11/+5
Enum lp8727_chg_state can be removed because only one charger status is used - EOC(End Of Charge). To check whether the EOC is reached or not, use simple comparison rather than shift-operation. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Fix code for getting battery tempKim, Milo1-5/+26
For better understanding, use specific function and definitions rather than magic numbers. New enum type for die temperature is matched with hex codes. Specific temperature names are better than 0x1, 0x2 and 0x3. And lp8727_is_high_temperature() function has better readability than comparing raw register values. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Clear interrrupts at inital timeKim, Milo1-0/+8
To initialize the device, previous interrupts need to be cleared while loading the driver. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Clean up the interrupt handlerKim, Milo1-9/+28
For better understanding, function name is changed. (lp8727_intr_config() is replaced with lp8727_setup_irq().) The private IRQ number is set when the IRQ is allocated successfully. This data is used for releasing the IRQ on unloading the driver. Even the IRQ number is not defined, the driver should be operated. In this case, just return as 0. In additional function lp8727_release_irq(), the workqueue is canceled and the allocated IRQ is released. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Remove unnecessary workqueue threadKim, Milo1-12/+1
LP8727 has two IRQ threads. One is the I2C HW IRQ pin, the other is for delayed interrupt processing. But this delayed processing can be handled without additional single thread by using schedule_delayed_work() with jiffies time value. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Add configurable debouce timerKim, Milo1-3/+9
Debounce time is configurable in the platform side. If it is not defined, the default value is 270ms. Platform data is msec unit, and this time is converted to jiffies internally. The workqueue uses this jiffies time in the interrupt handling. So debounce_jiffies is added in the private data. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Fix buggy code of NULL pdataKim, Milo1-7/+21
LP8727 platform data is optional, so the driver should work even the platform data is NULL. To check the platform data, charging parameter data should be changed to the pointer type. Fix NULL point access problem when getting the battery properties. When the data is NULL, just return as invalid value. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Cleanup _probe() and _remove()Kim, Milo1-11/+9
If the lp8727_register_psy() gets failed, registered interrupt handler should be freed, but this is not complete solution. It has still problem. Assume that the IRQ occurs while unregistering power supply devices. Then the ISR will access to freed IRQ. From Anton's opinion, it can be resolved if re-ordering the call sequence. Register power supplies first, then create interrupt handler. Then no need to free the IRQ in _probe(). Additionally goto statements can be removed because those can be replaced with return statements. The _remove() should be changed the sequence - in reverse order of _probe() Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Use devm_kzalloc()Kim, Milo1-6/+2
Use devm_kzalloc() rather than kzalloc()/kfree() to make allocating/freeing the private data simpler. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-09-20lp8727_charger: Use IRQF_ONESHOTFengguang Wu1-1/+1
Generated by: scripts/coccinelle/misc/irqf_oneshot.cocci ERROR: Threaded IRQ with no primary handler requested without IRQF_ONESHOT Make sure threaded IRQs without a primary handler are always request with IRQF_ONESHOT Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Acked-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-08-22lp8727_charger: Unregister power supply at error path of lp8727_register_psyDevendra Naga1-7/+9
if usb power supply registration fails, we wont unregister the ac power supply if battery power supply registration fails, we wont unregister the usb, and ac supply, take care of those things and also no need of goto -err_mem: at the fail case of kzalloc simply can have return -ENOMEM Signed-off-by: Devendra Naga <develkernel412222@gmail.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-07-14lp8727_charger: Move header file into platform_data directoryKim, Milo1-1/+1
The lp8727 header can be used only in the platform side, so it can be moved to the platform_data directory. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-26power_supply: Convert i2c drivers to module_i2c_driverAxel Lin1-13/+1
Factor out some boilerplate code for i2c driver registration into module_i2c_driver. Signed-off-by: Axel Lin <axel.lin@gmail.com> Cc: Woogyom Kim <milo.kim@ti.com> Cc: Daniel Jeong <daniel.jeong@ti.com> Cc: Minkyu Kang <mk7.kang@samsung.com> Cc: Peter Edwards <sweetlilmre@gmail.com> Acked-by: Milo(Woogyom) Kim <milo.kim@ti.com> Acked-by: Rhyland Klein <rklein@nvidia.com> Acked-by: Ryan Mallon <rmallon@gmail.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-26lp8727_charger: Add MODULE_DEVICE_TABLEAxel Lin1-0/+1
Add MODULE_DEVICE_TABLE to setup modalias for lp8727. Allows auto modprobing. Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-26lp8727_charger: Correct typos on the commentKim, Milo1-1/+1
intergrated charger -> integrated charger ^ Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-26lp8727_charger: Fix wrong code styleKim, Milo1-5/+5
Definition of STATUS2 : remove space before tabs. Return code of lp8727_is_dedicated_charger(), lp8727_is_usb_charger() : remove parentheses when return is not a function. MODULE_AUTHOR section : remove space at the start of a line. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-26lp8727_charger: Change i2c functionsKim, Milo1-28/+20
On writing single byte via i2c, use i2c_smbus_write_byte_data() rather than i2c_smbus_write_i2c_block_data(). Name changes : lp8727_i2c_read() -> lp8727_read_bytes() lp8727_i2c_write() -> removed lp8727_i2c_read_byte() -> lp8727_read_byte() lp8727_i2c_write_byte() -> lp8727_write_byte() Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-26lp8727_charger: Add error check routine on probe()Kim, Milo1-18/+39
Add error checking on initializing registers and interrupt handler. Initializing registers - lp8727_init_device() : check i2c error during probing the driver. Initializing interrupt handler - lp8727_intr_config() : check an error on creating the irq thread. If an error occurs on probing lp8727 driver, allocated lp8727 driver memory is freed. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-03-26lp8727_charger: Add company name and descriptionKim, Milo1-1/+2
Add 'Texas Instruments' because TI acquired National semiconductor at 2011. And the driver information is added in the header file. Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-02-01lp8727_charger: Add terminating entry for i2c_device_id tableAxel Lin1-0/+1
The i2c_device_id table is supposed to be zero-terminated. Signed-off-by: Axel Lin <axel.lin@gmail.com> Acked-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2012-01-04lp8727_charger: Coding style changesKim, Milo1-25/+25
1. Useless braces were omitted 2. Useless void casts were omitted 3. module exit name changed lp8727_chg_exit -> lp8727_exit 4. Pointer coding style changes no space between pointer('*') and pointer name ex) u8 * data -> u8 *data 5. Author information change : email and additional author Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2012-01-04lp8727_charger: Add supported i2c functionality check routineKim, Milo1-0/+3
lp8727 i2c r/w functions are based on SMBUS I2C BLOCK. So the driver needs to check whether i2c bus supports this functionality or not. Signed-off-by: Woogyom Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
2012-01-04power_supply: Add LP8727 charger driverWoogyom Kim1-0/+491
National Semiconductor LP8727 is the battery charger with Micro/Mini USB interface. This IC includes below functions: - I2C interface for accessing user registers - Single input Li-Ion battery charger - Charger input ID detection from Micro/Mini USB - Multiplexing switches on USB, UART Signed-off-by: Woogyom Kim <milo.kim@ti.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
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