linux-kernel - [PATCH v5 0/2] cpufreq: qcom-hw: Add support for QCOM cpufreq HW driver

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Message-Id: <1531418745-19742-1-git-send-email-tdas@codeaurora.org>
Date:   Thu, 12 Jul 2018 23:35:43 +0530
From:   Taniya Das <tdas@...eaurora.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        Stephen Boyd <sboyd@...nel.org>
Cc:     Rajendra Nayak <rnayak@...eaurora.org>,
        Amit Nischal <anischal@...eaurora.org>,
        devicetree@...r.kernel.org, robh@...nel.org,
        skannan@...eaurora.org, amit.kucheria@...aro.org,
        evgreen@...gle.com, Taniya Das <tdas@...eaurora.org>
Subject: [PATCH v5 0/2] cpufreq: qcom-hw: Add support for QCOM cpufreq HW driver

[v5]
  * Remove mapping different register regions of perf/lut/enable,
    instead map the entire HW region.
  * Add reg_offset/cpufreq_qcom_std_offsets to be supplied as device data.
  * Check of src == 0 during lut read.
  * Add of_node_put(cpu_np) in qcom_get_related_cpus
  * Update the qcom_cpu_resources_init for register offset data,
    and cleanup the related cpus to keep a single copy of CPUfreq.
  * Replace FW with HW, update Kconfig, rename filename qcom-cpufreq-hw.c
  * Update the documentation binding to reflect the changes of mapping the
  * entire HW region.

[v4]
  * Fixed console messages as per comments.
  * Return error from qcom_resources_init()
    in the cases where failed to get frequency domain.
  * Rename cpu_dev to cpu_np in qcom_resources_init,
    qcom_get_related_cpus(). Also use temp variable freq_np in
    qcom_get_related_cpus().
  * Update qcom_cpufreq_fw_get() to use the policy data to incoporate
    the hotplug use case.
  * Update code to use of fast_switching.
  * Check for !c->max_cores instead of cpumask_empty in
    qcom_get_related_cpus().
  * Update the logic of assigning 'c' to qcom_freq_domain_map[cpu].

 [v3]
  * Remove index check from 'qcom_cpufreq_fw_target_index'.
  * Update the Documentation binding to add the platform specific properties in
    the CPU nodes, node name "qcom,freq-domain".
  * Update return value to '0' from -ENODEV from 'qcom_cpufreq_fw_get'.
  * Update the logic for boost frequency to use local variables instead of
    cpufreq driver data in 'qcom_read_lut'.
  * Update the logic in 'qcom_get_related_cpus' to find the related cpus.
  * Update the reg-names to remove "_base" and also update the binding with the
    description of these registers.
  * Update the logic in 'qcom_resources_init' to address the new device tree
    notation of handling the frequency domain phandles.

 [v2]
 * Fixed the alignment issues in "qcom_cpufreq_fw_target_index" for dev_err and
   also for "qcom_cpu_resources_init".
 * Removed ret = 0 from qcom_get_related_cpus and added to check for
   cpu_mask_empty to return -ENOENT.
 * Fixes qcom_cpu_resources_init function
   * Remove initialization of 'index'
   * Check for valid 'c'
 * Removed initialization of 'prev_cc' from 'qcom_read_lut'.
 * Remove initialization of 'ret' from function qcom_resources_init and add
   return -ENODEV based on 'of_get_available_child_count'.
 * Removed initialization of 'rc' from qcom_cpufreq_fw_driver_probe
 * Removed module_exit as this driver would not be used as module, also updated
   the Kconfig to bool from tristate.
 * Updated the subsystem in device tree bindings.

 [v1]
   * Fixed compilation reported by Amit K.

Taniya Das (2):
  dt-bindings: cpufreq: Introduce QCOM CPUFREQ Firmware bindings
  cpufreq: qcom-hw: Add support for QCOM cpufreq HW driver

 .../bindings/cpufreq/cpufreq-qcom-hw.txt           | 158 ++++++++++
 drivers/cpufreq/Kconfig.arm                        |  10 +
 drivers/cpufreq/Makefile                           |   1 +
 drivers/cpufreq/qcom-cpufreq-hw.c                  | 344 +++++++++++++++++++++
 4 files changed, 513 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.txt
 create mode 100644 drivers/cpufreq/qcom-cpufreq-hw.c

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