linux.git/drivers/base/regmap, branch v4.16

Merge tag 'char-misc-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2018-02-01T18:31:17+00:00

Pull char/misc driver updates from Greg KH:
 "Here is the big pull request for char/misc drivers for 4.16-rc1.

  There's a lot of stuff in here. Three new driver subsystems were added
  for various types of hardware busses:

   - siox
   - slimbus
   - soundwire

  as well as a new vboxguest subsystem for the VirtualBox hypervisor
  drivers.

  There's also big updates from the FPGA subsystem, lots of Android
  binder fixes, the usual handful of hyper-v updates, and lots of other
  smaller driver updates.

  All of these have been in linux-next for a long time, with no reported
  issues"

* tag 'char-misc-4.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (155 commits)
  char: lp: use true or false for boolean values
  android: binder: use VM_ALLOC to get vm area
  android: binder: Use true and false for boolean values
  lkdtm: fix handle_irq_event symbol for INT_HW_IRQ_EN
  EISA: Delete error message for a failed memory allocation in eisa_probe()
  EISA: Whitespace cleanup
  misc: remove AVR32 dependencies
  virt: vbox: Add error mapping for VERR_INVALID_NAME and VERR_NO_MORE_FILES
  soundwire: Fix a signedness bug
  uio_hv_generic: fix new type mismatch warnings
  uio_hv_generic: fix type mismatch warnings
  auxdisplay: img-ascii-lcd: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE
  uio_hv_generic: add rescind support
  uio_hv_generic: check that host supports monitor page
  uio_hv_generic: create send and receive buffers
  uio: document uio_hv_generic regions
  doc: fix documentation about uio_hv_generic
  vmbus: add monitor_id and subchannel_id to sysfs per channel
  vmbus: fix ABI documentation
  uio_hv_generic: use ISR callback method
  ...

Merge remote-tracking branches 'regmap/topic/soundwire' and 'regmap/topic/zero' into regmap-next

2018-01-12T20:04:01+00:00

Merge remote-tracking branches 'regmap/topic/const', 'regmap/topic/flat', 'regmap/topic/hwspinlock' and 'regmap/topic/nolock' into regmap-next

2018-01-12T20:03:57+00:00

regmap: Allow empty read/write_flag_mask

2018-01-08T12:15:04+00:00

All zero read and write masks in the regmap config are used to signal no
special mask is needed and the bus defaults are used. In some devices
all zero read/write masks are the special mask and bus defaults should
not be used. To signal this a new variable is added.

For example SPI often sets bit 7 in address to signal to the device a
read is requested. On TI AFE44xx parts with SPI interfaces no bit
needs to be set as registers are either read or write only and the
operation can be determined from the address only. For this case both
masks must be zero to not effect the address.

Signed-off-by: Andrew F. Davis 
Signed-off-by: Mark Brown

regcache: flat: Un-inline index lookup from cache access

2018-01-08T12:08:57+00:00

This makes the code slightly more readable and allows for cleaner
addition of functionality in later patches.

Signed-off-by: Andrew F. Davis 
Signed-off-by: Mark Brown

regmap: Add SoundWire bus support

2018-01-08T11:27:18+00:00

SoundWire bus provides sdw_read() and sdw_write() APIs for Slave
devices to program the registers. Provide support in regmap for
SoundWire bus.

Signed-off-by: Hardik T Shah 
Signed-off-by: Sanyog Kale 
Reviewed-by: Philippe Ombredanne 
Acked-by: Pierre-Louis Bossart 
Reviewed-by: Takashi Iwai 
Signed-off-by: Vinod Koul 
Signed-off-by: Mark Brown

regmap: Add one flag to indicate if a hwlock should be used

2017-12-27T10:37:03+00:00

Since the hwlock id 0 is valid for hardware spinlock core, but now id 0
is treated as one invalid value for regmap. Thus we should add one extra
flag for regmap config to indicate if a hardware spinlock should be used,
then id 0 can be valid for regmap to request.

Signed-off-by: Baolin Wang 
Signed-off-by: Mark Brown

regmap: debugfs: document why we don't create the debugfs entries

2017-12-27T10:33:24+00:00

This is a follow-up to commit a5ba91c380b8 ("regmap: debugfs: emit a
debug message when locking is disabled"). I figured that a user may
see this message, grep the code, come to this place and he still won't
know why we actually disabled debugfs.

Add a comment explaining the reason.

Signed-off-by: Bartosz Golaszewski 
Signed-off-by: Mark Brown

regmap: debugfs: emit a debug message when locking is disabled

2017-12-21T12:27:25+00:00

We currently silently omit creating the debugfs entries when regmap
locking is disabled. Users may not be aware of the reason for which
regmap files don't show up in debugfs. Add a dev_dbg() message
explaining that.

Signed-off-by: Bartosz Golaszewski 
Signed-off-by: Mark Brown

regmap: use proper part of work_buf for storing val

2017-12-19T10:55:40+00:00

The map->work_buf is a buffer preallocated in __regmap_init() with size
allowing it to store all 3 parts of a buffer - reg, pad and val. While
reg and val parts are always properly setup before each transaction, the
pad part is left at its default value (zeros). Until it is overwritten,
that is.

_regmap_bus_read(), when calling _regmap_raw_read() uses beginning of
work_buf as a place to store data read. Usually that is fine but if
val_bits > reg_bits && pad_bits > 0, padding area of work_buf() may get
overwritten. Since padding is not zeroed before each transaction,
garbage will be used on next calls.

This patch moves the val pointer used for _regmap_raw_read() to point
to a part of work_buf intended for storing value read.

Signed-off-by: Krzysztof Adamski 
Signed-off-by: Mark Brown