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cpufreq: hisilicon: add acpu driver

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Add acpu driver for hisilicon SoC, acpu is application processor
subsystem. Currently the acpu has the coupled clock domain for two
clusters, so this driver will directly use cpufreq-dt driver as
backend.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Leo Yan 2015-03-30 13:26:37 +08:00 committed by Rafael J. Wysocki
parent 09a972d162
commit 5acb972fed
3 changed files with 52 additions and 0 deletions
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9
drivers/cpufreq/Kconfig.arm
View file

@ -108,6 +108,15 @@ config ARM_HIGHBANK_CPUFREQ
If in doubt, say N.
config ARM_HISI_ACPU_CPUFREQ
tristate "Hisilicon ACPU CPUfreq driver"
depends on ARCH_HISI && CPUFREQ_DT
select PM_OPP
help
This enables the hisilicon ACPU CPUfreq driver.
If in doubt, say N.
config ARM_IMX6Q_CPUFREQ
tristate "Freescale i.MX6 cpufreq support"
depends on ARCH_MXC

1
drivers/cpufreq/Makefile
View file

@ -59,6 +59,7 @@ arm-exynos-cpufreq-$(CONFIG_ARM_EXYNOS4X12_CPUFREQ) += exynos4x12-cpufreq.o
arm-exynos-cpufreq-$(CONFIG_ARM_EXYNOS5250_CPUFREQ) += exynos5250-cpufreq.o
obj-$(CONFIG_ARM_EXYNOS5440_CPUFREQ) += exynos5440-cpufreq.o
obj-$(CONFIG_ARM_HIGHBANK_CPUFREQ) += highbank-cpufreq.o
obj-$(CONFIG_ARM_HISI_ACPU_CPUFREQ) += hisi-acpu-cpufreq.o
obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o
obj-$(CONFIG_ARM_INTEGRATOR) += integrator-cpufreq.o
obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o

42
drivers/cpufreq/hisi-acpu-cpufreq.c Normal file
View file

@ -0,0 +1,42 @@
/*
* Hisilicon Platforms Using ACPU CPUFreq Support
*
* Copyright (c) 2015 Hisilicon Limited.
* Copyright (c) 2015 Linaro Limited.
*
* Leo Yan <leo.yan@linaro.org>
*
* 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.
*
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
* kind, whether express or implied; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
static int __init hisi_acpu_cpufreq_driver_init(void)
{
struct platform_device *pdev;
if (!of_machine_is_compatible("hisilicon,hi6220"))
return -ENODEV;
pdev = platform_device_register_simple("cpufreq-dt", -1, NULL, 0);
return PTR_ERR_OR_ZERO(pdev);
}
module_init(hisi_acpu_cpufreq_driver_init);
MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>");
MODULE_DESCRIPTION("Hisilicon acpu cpufreq driver");
MODULE_LICENSE("GPL v2");