Commit Graph

7 Commits

Author SHA1 Message Date
Axel Lin
d422234f17
regulator: ltc3676: Fix module description
This driver is for LTC3676 rather than LTC1376.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-02-15 17:39:36 +00:00
Axel Lin
502aba81aa
regulator: ltc3676: Simplify .readable_reg and .writable_reg callbacks
Use case range for continuous range to make the code shorter.
The .readable_reg and .writable_reg implementation are exactly the same,
so use a common ltc3676_readable_writeable_reg function instead.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-02-15 17:37:51 +00:00
David Frey
1c96a2f67c
regmap: split up regmap_config.use_single_rw
Split regmap_config.use_single_rw into use_single_read and
use_single_write. This change enables drivers of devices which only
support bulk operations in one direction to use the regmap_bulk_*()
functions for both directions and have their bulk operation split into
single operations only when necessary.

Update all struct regmap_config instances where use_single_rw==true to
instead set both use_single_read and use_single_write. No attempt was
made to evaluate whether it is possible to set only one of
use_single_read or use_single_write.

Signed-off-by: David Frey <dpfrey@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-09-07 13:03:55 +01:00
Marek Vasut
d2a66ddfe8
regulator: ltc3676: Assure PGOOD mask is set before changing voltage
Make sure the DVBxB bit 5, PGOOD mask, is set before changing voltage
on the buck converters. If the PGOOD mask bit is not set, the PMIC may
deassert the PGOOD signal during the voltage transition.

On systems that use the PGOOD signal as a power OK indication for the
board or SoC, which should be the case on correct designs, deasserting
the PGOOD signal will lead to system reset or shutdown, which is not
the expected behavior when changing PMIC buck converter voltage.

Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-05-02 06:00:20 +09:00
Javier Martinez Canillas
c314341557 regulator: ltc3676: Add OF device ID table
The driver doesn't have a struct of_device_id table but supported devices
are registered via Device Trees. This is working on the assumption that a
I2C device registered via OF will always match a legacy I2C device ID and
that the MODALIAS reported will always be of the form i2c:<device>.

But this could change in the future so the correct approach is to have an
OF device ID table if the devices are registered via OF.

Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-02-21 10:30:56 -08:00
Bhumika Goyal
f9e93acc14 regulator: ltc3676: constify regulator_ops structure
Declare regulator_ops structure as const as it is only stored in the ops
field of a regulator_desc structure. This field is of type const, so
regulator_ops structures having this property can be made const too.

File size before: drivers/regulator/ltc3676.o
   text	   data	    bss	    dec	    hex	filename
   2369	   2808	    288	   5465	   1559	drivers/regulator/ltc3676.o

File size after: drivers/regulator/ltc3676.o
   text	   data	    bss	    dec	    hex	filename
   3145	   2296	      8	   5449	   1549	drivers/regulator/ltc3676.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-01-31 20:48:35 +00:00
Tim Harvey
37b918a034 regulator: Add LTC3676 support
This patch adds support for the Linear Technology LTC3676
8-output I2C voltage regulator IC.

Cc: Jaffer Kapasi <jkapasi@linear.com>
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-08-16 12:28:00 +01:00