diff options
| author | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2014-10-19 11:30:28 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-10-21 00:51:01 +0200 |
| commit | 34e5a5273d6aa0ee8836bd5d6111b135ffae6931 (patch) | |
| tree | 7317dc2b6efc5e4f407be166f652ee51c54d4340 | |
| parent | 51315cdfa0521fff3059cec5fb8ffecc7f37cba7 (diff) | |
cpufreq: cpufreq-dt: extend with platform_data
This commit extends the cpufreq-dt driver to take a platform_data
structure. This structure is for now used to tell the cpufreq-dt
driver the layout of the clocks on the platform, i.e whether all CPUs
share the same clock or whether each CPU has a separate clock.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/cpufreq/cpufreq-dt.c | 17 | ||||
| -rw-r--r-- | include/linux/cpufreq-dt.h | 22 |
2 files changed, 37 insertions, 2 deletions
diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c index 6bbb8b91344..52facdaf531 100644 --- a/drivers/cpufreq/cpufreq-dt.c +++ b/drivers/cpufreq/cpufreq-dt.c @@ -18,6 +18,7 @@ #include <linux/cpu.h> #include <linux/cpu_cooling.h> #include <linux/cpufreq.h> +#include <linux/cpufreq-dt.h> #include <linux/cpumask.h> #include <linux/err.h> #include <linux/module.h> @@ -178,6 +179,7 @@ try_again: static int cpufreq_init(struct cpufreq_policy *policy) { + struct cpufreq_dt_platform_data *pd; struct cpufreq_frequency_table *freq_table; struct thermal_cooling_device *cdev; struct device_node *np; @@ -265,9 +267,18 @@ static int cpufreq_init(struct cpufreq_policy *policy) policy->driver_data = priv; policy->clk = cpu_clk; - ret = cpufreq_generic_init(policy, freq_table, transition_latency); - if (ret) + ret = cpufreq_table_validate_and_show(policy, freq_table); + if (ret) { + dev_err(cpu_dev, "%s: invalid frequency table: %d\n", __func__, + ret); goto out_cooling_unregister; + } + + policy->cpuinfo.transition_latency = transition_latency; + + pd = cpufreq_get_driver_data(); + if (pd && !pd->independent_clocks) + cpumask_setall(policy->cpus); of_node_put(np); @@ -335,6 +346,8 @@ static int dt_cpufreq_probe(struct platform_device *pdev) if (!IS_ERR(cpu_reg)) regulator_put(cpu_reg); + dt_cpufreq_driver.driver_data = dev_get_platdata(&pdev->dev); + ret = cpufreq_register_driver(&dt_cpufreq_driver); if (ret) dev_err(cpu_dev, "failed register driver: %d\n", ret); diff --git a/include/linux/cpufreq-dt.h b/include/linux/cpufreq-dt.h new file mode 100644 index 00000000000..0414009e2c3 --- /dev/null +++ b/include/linux/cpufreq-dt.h @@ -0,0 +1,22 @@ +/* + * Copyright (C) 2014 Marvell + * Thomas Petazzoni <thomas.petazzoni@free-electrons.com> + * + * 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__ + +struct cpufreq_dt_platform_data { + /* + * True when each CPU has its own clock to control its + * frequency, false when all CPUs are controlled by a single + * clock. + */ + bool independent_clocks; +}; + +#endif /* __CPUFREQ_DT_H__ */ |