linux-toradex.git/drivers/extcon/extcon-max77693.c, branch v3.14.35

extcon: max77693: Fix two NULL pointer exceptions on missing pdata

2014-07-01T03:11:52+00:00

commit d5653f2b7304f05eeb45d84f123cf02f840b8537 upstream.

Fix NULL pointer exceptions when platform data is not supplied.

Trace of one exception:
Unable to handle kernel NULL pointer dereference at virtual address 00000008
pgd = c0004000
[00000008] *pgd=00000000
Internal error: Oops: 5 [#1] PREEMPT SMP ARM
Modules linked in:
CPU: 2 PID: 1 Comm: swapper/0 Not tainted 3.14.0-12045-gead5dd4687a6-dirty #1628
task: eea80000 ti: eea88000 task.ti: eea88000
PC is at max77693_muic_probe+0x27c/0x528
LR is at regmap_write+0x50/0x60
pc : []    lr : []    psr: 20000113
sp : eea89e38  ip : 00000000  fp : c098a834
r10: ee1a5a10  r9 : 00000005  r8 : c098a83c
r7 : 0000000a  r6 : c098a774  r5 : 00000005  r4 : eeb006d0
r3 : c0697bd8  r2 : 00000000  r1 : 00000001  r0 : 00000000
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
Control: 10c5387d  Table: 4000404a  DAC: 00000015
Process swapper/0 (pid: 1, stack limit = 0xeea88240)
Stack: (0xeea89e38 to 0xeea8a000)
9e20:                                                       c08499fc eeb006d0
9e40: 00000000 00000000 c0915f98 00000001 00000000 ee1a5a10 c098a730 c09a88b8
9e60: 00000000 c098a730 c0915f98 00000000 00000000 c02d6aa0 c02d6a88 ee1a5a10
9e80: c0a712c8 c02d54e4 00001204 c0628b00 ee1a5a10 c098a730 ee1a5a44 00000000
9ea0: eea88000 c02d57b4 00000000 c098a730 c02d5728 c02d3a24 ee813e5c eeb9d534
9ec0: c098a730 ee22f700 c097c720 c02d4b14 c08174ec c098a730 00000006 c098a730
9ee0: 00000006 c092fd30 c09b8500 c02d5df8 00000000 c093cbb8 00000006 c0008928
9f00: 000000c3 ef7fc785 00000000 ef7fc794 00000000 c08af968 00000072 eea89f30
9f20: ef7fc85e c065f198 000000c3 c003e87c 00000003 00000000 c092fd3c 00000000
9f40: c08af618 c0826d58 00000006 00000006 c0956f58 c093cbb8 00000006 c092fd30
9f60: c09b8500 000000c3 c092fd3c c08e8510 00000000 c08e8bb0 00000006 00000006
9f80: c08e8510 c0c0c0c0 00000000 c0628fac 00000000 00000000 00000000 00000000
9fa0: 00000000 c0628fb4 00000000 c000f038 00000000 00000000 00000000 00000000
9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 c0c0c0c0 c0c0c0c0
[] (max77693_muic_probe) from [] (platform_drv_probe+0x18/0x48)
[] (platform_drv_probe) from [] (driver_probe_device+0x140/0x384)
[] (driver_probe_device) from [] (__driver_attach+0x8c/0x90)
[] (__driver_attach) from [] (bus_for_each_dev+0x54/0x88)
[] (bus_for_each_dev) from [] (bus_add_driver+0xe8/0x204)
[] (bus_add_driver) from [] (driver_register+0x78/0xf4)
[] (driver_register) from [] (do_one_initcall+0xc4/0x174)
[] (do_one_initcall) from [] (kernel_init_freeable+0xfc/0x1c8)
[] (kernel_init_freeable) from [] (kernel_init+0x8/0xec)
[] (kernel_init) from [] (ret_from_fork+0x14/0x3c)
Code: caffffe7 e59d200c e3550001 b3a05001 (e5923008)
---[ end trace 85db969ce011bde7 ]---

Signed-off-by: Krzysztof Kozlowski 
Fixes: 190d7cfc8632
Signed-off-by: Chanwoo Choi 
Signed-off-by: Greg Kroah-Hartman

Merge tag 'extcon-next-for-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/extcon into char-misc-next

2013-09-27T03:47:25+00:00

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

extcon: Simplify extcon_dev_register() prototype by removing unnecessary parameter

2013-09-27T00:37:01+00:00

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 
Cc: Kishon Vijay Abraham I 
Cc: Charles Keepax 
Cc: Mark Brown 
Signed-off-by: Chanwoo Choi 
Signed-off-by: Myungjoo Ham

extcon: max77693: Fix checkpatch warning

2013-09-27T00:37:00+00:00

Fixes the following warning:
WARNING: space prohibited before semicolon

Signed-off-by: Sachin Kamat 
Signed-off-by: Chanwoo Choi

extcon: Fix up 80 column coding style issues

2013-09-26T19:03:30+00:00

This patch fix 80 column coding sytle issues by using checkpatch script.

Cc: Charles Keepax 
Cc: Mark Brown 
Signed-off-by: Chanwoo Choi 
Signed-off-by: Myungjoo Ham 
Signed-off-by: Greg Kroah-Hartman

extcon: max77693: Fix return value

2013-04-08T22:53:46+00:00

Return the value obtained from the function instead of hardcoding.
Silences the following warnings:
drivers/extcon/extcon-max77693.c:297 max77693_muic_set_path()
info: why not propagate 'ret' from max77693_update_reg() instead of (-11)?
drivers/extcon/extcon-max77693.c:310 max77693_muic_set_path()
info: why not propagate 'ret' from max77693_update_reg() instead of (-11)?

Signed-off-by: Sachin Kamat 
Signed-off-by: Chanwoo Choi 
Signed-off-by: Myungjoo Ham

extcon: max77693: Staticize default_init_data

2013-04-08T22:53:46+00:00

Commit 0ec83bd246 ("extcon: max77693: Initialize register of MUIC
device to bring up it without platform data") added this structure
but forgot to make it static. Without this patch we get the following
warning:
drivers/extcon/extcon-max77693.c:41:26: warning:
symbol 'default_init_data' was not declared. Should it be static?

Signed-off-by: Sachin Kamat 
Signed-off-by: Chanwoo Choi 
Signed-off-by: Myungjoo Ham

extcon: max77693: Initialize register of MUIC device to bring up it without platform data

2013-03-13T08:38:57+00:00

This patch set default value of MUIC register to bring up MUIC device.

If user don't set some initial value for MUIC device through platform data,
extcon-max77693 driver use 'default_init_data' to bring up base operation
of MAX77693 MUIC device.

Signed-off-by: Chanwoo Choi 
Signed-off-by: Myungjoo Ham

extcon: max77693: Fix bug of wrong pointer when platform data is not used

2013-03-13T08:32:35+00:00

This patch fix wrong pointer of platform data. If each machine set
platform data for h/w path or delay time of workqueue, this driver
happen kernel panic related to null pointer.

Signed-off-by: Chanwoo Choi 
Signed-off-by: Myungjoo Ham

extcon: max77693: Make max77693_extcon_cable static

2013-02-13T22:52:49+00:00

'max77693_extcon_cable' is used only in this file. Hence
make it static.

Signed-off-by: Sachin Kamat 
Signed-off-by: Chanwoo Choi 
Signed-off-by: Myungjoo Ham