linux-kernel - [PATCH v4 0/2] powernv/cpuidle Device-tree parsing cleanup

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Message-Id: <20180705114022.19285-1-akshay.adiga@linux.vnet.ibm.com>
Date:   Thu,  5 Jul 2018 17:10:20 +0530
From:   Akshay Adiga <akshay.adiga@...ux.vnet.ibm.com>
To:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-pm@...r.kernel.org
Cc:     rjw@...ysocki.net, stewart@...ux.vnet.ibm.com,
        benh@...nel.crashing.org, svaidy@...ux.vnet.ibm.com,
        ego@...ux.vnet.ibm.com, npiggin@...il.com, mpe@...erman.id.au,
        Akshay Adiga <akshay.adiga@...ux.vnet.ibm.com>
Subject: [PATCH v4 0/2] powernv/cpuidle Device-tree parsing cleanup

Device-tree parsed multiple time in powernv cpuidle and powernv
hotplug code.

First to identify supported flags. Second time, to identify deepest_state
and first deep state. Third time, during cpuidle init to find the available
idle states. Any change in device-tree format will lead to make changes in
these 3 places. Errors in device-tree can be handled in a better manner.

This series adds code to parse device tree once and save in global structure.

Changes from v3 :
 - Removed a stale comment
Changes from v2 :
 - Fix build error (moved a hunk from patch 1 to patch 2)
Changes from v1 :
 - fold first 2 patches into 1
 - rename pm_ctrl_reg_* as psscr_*
 - added comment stating removal of pmicr parsing code
 - removed parsing code for pmicr
 - add member valid in pnv_idle_states_t to indicate if the psscr-mask/val
are valid combination,
 - Change function description of pnv_parse_cpuidle_dt
 - Added error handling code.


Akshay Adiga (2):
  powernv/cpuidle: Parse dt idle properties into global structure
  powernv/cpuidle: Use parsed device tree values for cpuidle_init

 arch/powerpc/include/asm/cpuidle.h    |  13 ++
 arch/powerpc/platforms/powernv/idle.c | 216 ++++++++++++++++----------
 drivers/cpuidle/cpuidle-powernv.c     | 158 ++++---------------
 3 files changed, 177 insertions(+), 210 deletions(-)

-- 
2.18.0.rc2.85.g1fb9df7