From 297a66221d2bed61e7d74d11bf071c7b489fc33d Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Fri, 9 Sep 2016 16:48:08 +0530 Subject: [PATCH] cpufreq: dt: Support governor tunables per policy The cpufreq-dt driver is also used for systems with multiple clock/voltage domains for CPUs, i.e. multiple cpufreq policies in a system. And in such cases the platform users may want to enable "governor tunables per policy". Support that via platform data, as not all users of the driver would want that behavior. Reported-by: Juri Lelli Signed-off-by: Viresh Kumar Signed-off-by: Rafael J. Wysocki --- drivers/cpufreq/cpufreq-dt-platdev.c | 7 +++++-- drivers/cpufreq/cpufreq-dt.c | 6 ++++++ drivers/cpufreq/cpufreq-dt.h | 19 +++++++++++++++++++ 3 files changed, 30 insertions(+), 2 deletions(-) create mode 100644 drivers/cpufreq/cpufreq-dt.h diff --git a/drivers/cpufreq/cpufreq-dt-platdev.c b/drivers/cpufreq/cpufreq-dt-platdev.c index 276378a43321..d2637e1a5710 100644 --- a/drivers/cpufreq/cpufreq-dt-platdev.c +++ b/drivers/cpufreq/cpufreq-dt-platdev.c @@ -11,6 +11,8 @@ #include #include +#include "cpufreq-dt.h" + static const struct of_device_id machines[] __initconst = { { .compatible = "allwinner,sun4i-a10", }, { .compatible = "allwinner,sun5i-a10s", }, @@ -93,7 +95,8 @@ static int __init cpufreq_dt_platdev_init(void) if (!match) return -ENODEV; - return PTR_ERR_OR_ZERO(platform_device_register_simple("cpufreq-dt", -1, - NULL, 0)); + return PTR_ERR_OR_ZERO(platform_device_register_data(NULL, "cpufreq-dt", + -1, match->data, + sizeof(struct cpufreq_dt_platform_data))); } device_initcall(cpufreq_dt_platdev_init); diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c index 2bd20534155d..5c07ae05d69a 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -25,6 +25,8 @@ #include #include +#include "cpufreq-dt.h" + struct private_data { struct device *cpu_dev; struct thermal_cooling_device *cdev; @@ -353,6 +355,7 @@ static struct cpufreq_driver dt_cpufreq_driver = { static int dt_cpufreq_probe(struct platform_device *pdev) { + struct cpufreq_dt_platform_data *data = dev_get_platdata(&pdev->dev); int ret; /* @@ -366,6 +369,9 @@ static int dt_cpufreq_probe(struct platform_device *pdev) if (ret) return ret; + if (data && data->have_governor_per_policy) + dt_cpufreq_driver.flags |= CPUFREQ_HAVE_GOVERNOR_PER_POLICY; + ret = cpufreq_register_driver(&dt_cpufreq_driver); if (ret) dev_err(&pdev->dev, "failed register driver: %d\n", ret); diff --git a/drivers/cpufreq/cpufreq-dt.h b/drivers/cpufreq/cpufreq-dt.h new file mode 100644 index 000000000000..54d774e46c43 --- /dev/null +++ b/drivers/cpufreq/cpufreq-dt.h @@ -0,0 +1,19 @@ +/* + * Copyright (C) 2016 Linaro + * Viresh Kumar + * + * 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. + */ + +#ifndef __CPUFREQ_DT_H__ +#define __CPUFREQ_DT_H__ + +#include + +struct cpufreq_dt_platform_data { + bool have_governor_per_policy; +}; + +#endif /* __CPUFREQ_DT_H__ */ -- 2.20.1