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3 Commits

Author SHA1 Message Date
Thomas Gleixner
1802d0beec treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 
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 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 655 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 2019-05-30 11:26:41 -07:00
Justin Chen
0e9b114132 soc bcm: brcmstb: Add support for S2/S3/S5 suspend states (MIPS) 
This commit adds support for the Broadcom STB S2/S3/S5 suspend
states on MIPS based SoCs.

This requires quite a lot of code in order to deal with the
different HW blocks that need to be quiesced during suspend:

- DDR PHY
- DDR memory controller and arbiter
- control processor

The final steps of the suspend execute in cache and there is is a little
bit of assembly code in order to shut down the DDR PHY PLL and then go
into a wait loop until a wake-up even occurs. Conversely the resume part
involves waiting for the DDR PHY PLL to come back up and resume
executions where we left.

Signed-off-by: Justin Chen <justinpopo6@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
 2017-09-25 11:47:14 -07:00
Brian Norris
0b741b8234 soc: bcm: brcmstb: Add support for S2/S3/S5 suspend states (ARM) 
This commit adds support for the Broadcom STB S2/S3/S5 suspend states on
ARM based SoCs.

This requires quite a lot of code in order to deal with the different HW
blocks that need to be quiesced during suspend:

- DDR PHY SHIM
- DDR memory controller and sequencer
- control processor

The final steps of the suspend execute in an on-chip SRAM and there is a
little bit of assembly code in order to shut down the DDR PHY PLL and
then go into a wfi loop until a wake-up even occurs. Conversely the
resume part involves waiting for the DDR PHY PLL to come back up and
resume executions where we left.

For S3, because of our memory hashing (actual hashing code not included
for simplicity, and is bypassed) we need to relocate the writable
variables (stack) into SRAM shortly before suspending in order to leave
the DRAM untouched and create a reliable hash of its contents.

This code has been contributed by Brian Norris initially and has been
incrementally fixed and updated to support new chips by a lot of people.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Signed-off-by: Justin Chen <justinpopo6@gmail.com>
Signed-off-by: Gareth Powell <gpowell@broadcom.com>
Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
 2017-09-25 11:46:48 -07:00