From mboxrd@z Thu Jan 1 00:00:00 1970 From: leo.yan@linaro.org (Leo Yan) Date: Thu, 26 Mar 2015 19:48:06 +0800 Subject: [PATCH v2] cpufreq: hisilicon: add acpu driver Message-ID: <1427370486-14823-1-git-send-email-leo.yan@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- drivers/cpufreq/Kconfig.arm | 9 ++++++++ drivers/cpufreq/Makefile | 1 + drivers/cpufreq/hisi-acpu-cpufreq.c | 43 +++++++++++++++++++++++++++++++++++++ 3 files changed, 53 insertions(+) create mode 100644 drivers/cpufreq/hisi-acpu-cpufreq.c diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index 1b06fc4..4f3dbc8 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 82a1821..6b7a3f0 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 0000000..2c7a705 --- /dev/null +++ b/drivers/cpufreq/hisi-acpu-cpufreq.c @@ -0,0 +1,43 @@ +/* + * Hisilicon Platforms Using ACPU CPUFreq Support + * + * Copyright (c) 2015 Hisilicon Limited. + * Copyright (c) 2015 Linaro Limited. + * + * Leo Yan + * + * 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 +#include +#include +#include +#include +#include + +static int __init hisi_acpu_cpufreq_driver_init(void) +{ + struct platform_device_info devinfo = { .name = "cpufreq-dt", }; + struct platform_device *pdev; + + if (!of_machine_is_compatible("hisilicon,hi6220")) + return -ENODEV; + + pdev = platform_device_register_full(&devinfo); + return PTR_ERR_OR_ZERO(pdev); +} +module_init(hisi_acpu_cpufreq_driver_init); + +MODULE_AUTHOR("Leo Yan "); +MODULE_DESCRIPTION("Hisilicon acpu cpufreq driver"); +MODULE_LICENSE("GPL v2"); -- 1.9.1