linux-toradex.git/drivers/spmi/spmi.c, branch v5.9-rc5

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284

2019-06-05T15:36:37+00:00

Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 and
  only version 2 as published by the free software foundation this
  program is distributed in the hope that it will be useful but
  without any warranty without even the implied warranty of
  merchantability or fitness for a particular purpose see the gnu
  general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 294 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Allison Randal 
Reviewed-by: Alexios Zavras 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.825281744@linutronix.de
Signed-off-by: Greg Kroah-Hartman

spmi: Convert to using %pOF instead of full_name

2017-08-28T11:51:20+00:00

Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring 
Reviewed-by: Stephen Boyd 
Signed-off-by: Greg Kroah-Hartman

spmi: Include OF based modalias in device uevent

2017-07-17T13:00:47+00:00

Include the OF-based modalias in the uevent sent when registering SPMI
devices, so that user space has a chance to autoload the kernel module
for the device.

Tested-by: Rob Clark 
Reported-by: Rob Clark 
Reviewed-by: Stephen Boyd 
Signed-off-by: Bjorn Andersson 
Cc: stable 
Signed-off-by: Greg Kroah-Hartman

spmi: do not use bus internal data

2016-04-30T21:15:56+00:00

The variable p is a data structure which is used by the driver core
internally and it is not expected that busses will be directly accessing
these driver core internal only data.

Signed-off-by: Sudip Mukherjee 
Signed-off-by: Greg Kroah-Hartman

spmi: Auto-populate driver.owner in spmi_driver_register()

2015-09-21T02:32:02+00:00

Populate the owner field of the spmi driver when
spmi_driver_register() is called in a similar fashion to how
other *_driver_register() functions do it. This saves driver
writers from having to do this themselves.

Cc: Andy Gross 
Cc: Gilad Avidov 
Signed-off-by: Stephen Boyd 
Signed-off-by: Greg Kroah-Hartman

spmi: add command tracepoints for SPMI

2015-08-05T19:27:09+00:00

Add tracepoints to retrieve information about read, write
and non-data commands. For performance measurement support
tracepoints are added at the beginning and at the end of
transfers. Following is a list showing the new tracepoint
events. The "cmd" parameter here represents the opcode, SID,
and full 16-bit address.

spmi_write_begin: cmd and data buffer.
spmi_write_end  : cmd and return value.
spmi_read_begin : cmd.
spmi_read_end   : cmd, return value and data buffer.
spmi_cmd        : cmd.

The reason that cmd appears at both the beginning and at
the end event is that SPMI drivers can request commands
concurrently. cmd helps in matching the corresponding
events.

SPMI tracepoints can be enabled like:

echo 1 >/sys/kernel/debug/tracing/events/spmi/enable

and will dump messages that can be viewed in
/sys/kernel/debug/tracing/trace that look like:

... spmi_read_begin: opc=56 sid=00 addr=0x0000
... spmi_read_end: opc=56 sid=00 addr=0x0000 ret=0 len=02 buf=0x[01-40]
... spmi_write_begin: opc=48 sid=00 addr=0x0000 len=3 buf=0x[ff-ff-ff]

Suggested-by: Sagar Dharia 
Acked-by: Steven Rostedt 
Reviewed-by: Stephen Boyd 
Signed-off-by: Gilad Avidov 
Signed-off-by: Ankit Gupta 
Signed-off-by: Greg Kroah-Hartman

spmi: remove wakeup command before slave probe

2015-03-26T22:51:36+00:00

According to spmi spec a slave powers up into startup state and then
transitions into active state. Thus, the wakeup command is not required
before calling the slave's probe. The wakeup command is only needed for
slaves that are in sleep state after receiving the sleep command.

Cc: galak@codeaurora.org
Reviewed-by: Stephen Boyd 
Reviewed-by: Sagar Dharia 
Acked-by: Josh Cartwright 
Signed-off-by: Gilad Avidov 
Tested-by: Ivan T. Ivanov 
Signed-off-by: Greg Kroah-Hartman

spmi: Remove duplicate inclusion of module.h

2014-07-10T22:22:13+00:00

module.h was included twice.

Signed-off-by: Sachin Kamat 
Signed-off-by: Greg Kroah-Hartman

spmi: pm: drop bus-level PM suspend/resume routines

2014-03-09T06:15:52+00:00

SPMI defines the behavior of a device in the "SLEEP" state as being
"user-defined or specified by the device manufacturer".  Without
clearly-defined bus-level semantics for low-power states, push the
responsibility of transitioning a device into/out of "SLEEP" into SPMI
device drivers.

Cc: Felipe Balbi 
Signed-off-by: Josh Cartwright 
Signed-off-by: Greg Kroah-Hartman

spmi: Linux driver framework for SPMI

2014-02-15T19:55:28+00:00

System Power Management Interface (SPMI) is a specification
developed by the MIPI (Mobile Industry Process Interface) Alliance
optimized for the real time control of Power Management ICs (PMIC).

SPMI is a two-wire serial interface that supports up to 4 master
devices and up to 16 logical slaves.

The framework supports message APIs, multiple busses (1 controller
per bus) and multiple clients/slave devices per controller.

Signed-off-by: Kenneth Heitke 
Signed-off-by: Michael Bohan 
Signed-off-by: Josh Cartwright 
Signed-off-by: Greg Kroah-Hartman