[PATCH v4 1/8] cpufreq: cpufreq-cpu0: allow use of optional boost mode frequencies

Hi Viresh, Tomas,

On 14 May 2014 06:41, Thomas Abraham [off-list ref] wrote:

quoted

From: Thomas Abraham <redacted>

Lookup for the optional boost-frequency property in cpu0 node and if
available, enable support for boost mode frequencies. The
frequencies usable in boost mode are determined while preparing the
cpufreq table from the list of operating points available.

Cc: Shawn Guo <redacted>
Cc: Lukasz Majewski <redacted>
Signed-off-by: Thomas Abraham <redacted>
---
 .../devicetree/bindings/cpufreq/cpufreq-cpu0.txt   |    2 ++
 drivers/cpufreq/Kconfig                            |   11
+++++++++++ drivers/cpufreq/cpufreq-cpu0.c                     |
5 +++++ 3 files changed, 18 insertions(+), 0 deletions(-)

diff --git
a/Documentation/devicetree/bindings/cpufreq/cpufreq-cpu0.txt
b/Documentation/devicetree/bindings/cpufreq/cpufreq-cpu0.txt index
f055515..60f321a 100644 ---
a/Documentation/devicetree/bindings/cpufreq/cpufreq-cpu0.txt +++
b/Documentation/devicetree/bindings/cpufreq/cpufreq-cpu0.txt @@
-19,6 +19,8 @@ Optional properties:
 - cooling-min-level:
 - cooling-max-level:
      Please refer to
Documentation/devicetree/bindings/thermal/thermal.txt. +-
boost-frequency:
+     Please refer to
Documentation/devicetree/bindings/cpufreq/cpufreq-boost.txt

 Examples:

diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 1fbe11f..0ca4485 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig

@@ -194,6 +194,17 @@ config GENERIC_CPUFREQ_CPU0

          If in doubt, say N.

+config GENERIC_CPUFREQ_CPU0_BOOST

Get rid of this.. just not required.

I think that you can rely solely on the CPU_FREQ_BOOST_SW flag if the
original author of cpufreq-cpu0.c don't mind.

quoted

+       bool "Boost frequency support for generic CPU0 cpufreq
driver"
+       depends on GENERIC_CPUFREQ_CPU0
+       select CPU_FREQ_BOOST_SW
+       help
+         This enables support for software managed overclocking
(BOOST). It
+         allows usage of special frequencies (those beyond the
normal operating
+         frequencies).
+
+         If in doubt, say N.
+
 menu "x86 CPU frequency scaling drivers"
 depends on X86
 source "drivers/cpufreq/Kconfig.x86"

diff --git a/drivers/cpufreq/cpufreq-cpu0.c

b/drivers/cpufreq/cpufreq-cpu0.c index 1bf6bba..e6c21a8 100644

--- a/drivers/cpufreq/cpufreq-cpu0.c
+++ b/drivers/cpufreq/cpufreq-cpu0.c

@@ -194,6 +194,11 @@ static int cpu0_cpufreq_probe(struct

platform_device *pdev) transition_latency += ret * 1000;
        }

+#ifdef CONFIG_GENERIC_CPUFREQ_CPU0_BOOST
+       if (of_find_property(cpu_dev->of_node, "boost-frequency",
NULL))

Lets see what happens to the other thread for this.

quoted

+               cpu0_cpufreq_driver.boost_supported = true;
+#endif
+
        ret = cpufreq_register_driver(&cpu0_cpufreq_driver);
        if (ret) {
                pr_err("failed register driver: %d\n", ret);
--
1.7.4.4

-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group