linux-kernel - [PATCH v3 0/3] AT91 PM improvements

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <1596616610-15460-1-git-send-email-claudiu.beznea@microchip.com>
Date:   Wed, 5 Aug 2020 11:36:47 +0300
From:   Claudiu Beznea <claudiu.beznea@...rochip.com>
To:     <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <ludovic.desroches@...rochip.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Claudiu Beznea <claudiu.beznea@...rochip.com>
Subject: [PATCH v3 0/3] AT91 PM improvements

Hi,

This series adds ULP0 fast mode intended to reduce the suspend/resume
time in the detriment of power consumption (patch 1/3).
Along with this patch 2/3 adds code to avoid requesting a PM mode
not available on platforms not supporting it.
Patch 3/3 decrements a device_node refcount after its usage.

Thank you,
Claudiu Beznea

Changes in v3:
- force STANDBY and ULP0 modes for rm9200 and at91sam9 to avoid
  looping over all available modes and thus preserving booting time
- keep static in "static const int modes[] __initconst" in *_pm_init()
  functions to avoid compilation error "error: section attribute cannot
  be specified for local variables const int modes[] __initconst = {"
- remove sama5_pm() introduced in v2

Changes in v2:
- in patch 2/3:
	- move per SoC supported mode arrays in *_pm_init() functions.
	- use 2 booleans in at91_pm_modes_validate() for modes validation
	- continue to use array of supported modes in at91rm9200_pm_init()
	  and at91sam9_pm_init() instead of forcing
	  soc_pm.data.standby_mode = AT91_PM_STANDBY and
	  soc_pm.data.suspend_mode = AT91_PM_ULP0 to breaking the user
	  configuration (it might request ulp0 as standby mode or vice versa)

Claudiu Beznea (3):
  ARM: at91: pm: add support for ULP0 fast wakeup
  ARM: at91: pm: add per soc validation of pm modes
  ARM: at91: pm: of_node_put() after its usage

 arch/arm/mach-at91/pm.c         | 90 ++++++++++++++++++++++++++++++++++++++---
 arch/arm/mach-at91/pm.h         |  5 ++-
 arch/arm/mach-at91/pm_suspend.S | 41 +++++++++++++++++--
 3 files changed, 125 insertions(+), 11 deletions(-)

-- 
2.7.4