lkml.org 
[lkml]   [2019]   [Feb]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    Subject[RFC PATCH v1 0/3] bd718x7: Support SNVS low power state
    Patch series adding SNVS power state support to ROHM bd718x7 driver.

    The SNVS is a low power state used by i.MX family of SoCs. In SNVS
    state processor and most of the peripherials are shut off in order
    to minimize power consumption.

    BD71837 and BD71847 can be configured to use the SNVS state as a
    reset/shutdown target state. There is some HW limitations though.
    Main limitation is that regulators which have been under SW control
    (regarding enable/disable state) will stay shut down after such reset.
    Thus if SNVS is used as reset target the control of boot crucial
    regulators must be left to HW state machine.

    This patch seris allows one to describe the boot crucial regulators
    and reset/shutdown target state as well as the default HW state
    voltages from device-tree. I am unsure if the device-tree is the
    correct way to bring this information and hence I send this initial
    patch set as an RFC. Please comment and I will generate properly tested
    patch series on top of this idea if this is seen as a reasonable
    approach.

    ---

    Matti Vaittinen (3):
    devicetree: bindings: bd718x7: document HW state related ROHM specific
    properties
    regulator: add regulator_desc_list_voltage_linear_range
    regulator: bd718x7: Support SNVS low power state

    .../devicetree/bindings/mfd/rohm,bd71837-pmic.txt | 17 +++
    .../bindings/regulator/rohm,bd71837-regulator.txt | 36 ++++++
    drivers/regulator/bd718x7-regulator.c | 135 +++++++++++++++++++++
    drivers/regulator/helpers.c | 39 ++++--
    include/linux/regulator/driver.h | 6 +
    5 files changed, 223 insertions(+), 10 deletions(-)

    --
    2.14.3


    --
    Matti Vaittinen, Linux device drivers
    ROHM Semiconductors, Finland SWDC
    Kiviharjunlenkki 1E
    90220 OULU
    FINLAND

    ~~~ "I don't think so," said Rene Descartes. Just then, he vanished ~~~

    \
     
     \ /
      Last update: 2019-02-12 15:17    [W:3.655 / U:0.252 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site