Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1240694

Re: [PATCH net-next v3 1/2] regmap: Allow installing custom reg_update_bits function

Show all headers | View raw

[Multipart message — attachments visible in raw view] - view raw

On Thu, Oct 01, 2015 at 12:38:07PM -0400, jon@ringle.org wrote:
> From: Jon Ringle <jringle@gridpoint.com>
> 
> This commit allows installing a custom reg_update_bits function for cases where
> the hardware provides a mechanism to set or clear register bits without a
> read/modify/write cycle. Such is the case with the Microchip ENCX24J600.

Thanks, I've applied this.  I'll extend it so that individual devices
can do this as well - I've not looked at your driver but it might be
that this is a better option than regmap_bus for your driver (but both
are supported so meh).  Dave, I've tagged the commit and there's a pull
request for this below:

The following changes since commit 6ff33f3902c3b1c5d0db6b1e2c70b6d76fba357f:

  Linux 4.3-rc1 (2015-09-12 16:35:56 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git tags/regmap-offload-update-bits

for you to fetch changes up to 77792b11409c9270d98e604b4314b85ce886ac7d:

  regmap: Allow installing custom reg_update_bits function (2015-10-06 16:12:34 +0100)

----------------------------------------------------------------
regmap: Allow buses to provide a custom update_bits() operation

Some buses provide a native _update_bits() operation which for uncached
registers is faster than doing a read/modify/write cycle as it is a
single bus transaction.  Add support for implementing this to regmap.

----------------------------------------------------------------
Jon Ringle (1):
      regmap: Allow installing custom reg_update_bits function

 drivers/base/regmap/internal.h |  2 ++
 drivers/base/regmap/regmap.c   | 29 ++++++++++++++++++-----------
 include/linux/regmap.h         |  3 +++
 3 files changed, 23 insertions(+), 11 deletions(-)

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

Re: [PATCH net-next v3 1/2] regmap: Allow installing custom  reg_update_bits function Mark Brown <broonie@kernel.org> - 2015-10-06 18:40 +0200
  Re: [PATCH net-next v3 1/2] regmap: Allow installing custom  reg_update_bits function David Miller <davem@davemloft.net> - 2015-10-08 12:50 +0200

csiph-web