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authorLeo Yan <leo.yan@linaro.org>2015-03-30 13:26:37 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-04-02 02:24:54 +0200
commit5acb972fed8bcfe6c38a4bdef4e74148eaad04b2 (patch)
treebe8065bcc3d9728350965ea4ffb7bfcfa569799c /drivers/cpufreq
parent09a972d1620934142d30cfda455ffe429af751c4 (diff)
cpufreq: hisilicon: add acpu driver
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>
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r--drivers/cpufreq/Kconfig.arm9
-rw-r--r--drivers/cpufreq/Makefile1
-rw-r--r--drivers/cpufreq/hisi-acpu-cpufreq.c42
3 files changed, 52 insertions, 0 deletions
diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
index 1b06fc4640e2..4f3dbc8cf729 100644
--- a/drivers/cpufreq/Kconfig.arm
+++ b/drivers/cpufreq/Kconfig.arm
@@ -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
diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index 26df0ad00e32..cdce92ae2e8b 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -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
diff --git a/drivers/cpufreq/hisi-acpu-cpufreq.c b/drivers/cpufreq/hisi-acpu-cpufreq.c
new file mode 100644
index 000000000000..026d5b2224de
--- /dev/null
+++ b/drivers/cpufreq/hisi-acpu-cpufreq.c
@@ -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");