From f1db56284b01b1212a211023dcaa7846fd07d0ec Mon Sep 17 00:00:00 2001 From: Stephen Boyd Date: Fri, 30 May 2014 17:16:53 -0700 Subject: [PATCH 173/182] cpufreq: Add module to register cpufreq-krait device Register a cpufreq-krait device whenever we detect that a "qcom,krait" compatible CPU is present in DT. Signed-off-by: Stephen Boyd --- drivers/cpufreq/Kconfig.arm | 8 +++++++ drivers/cpufreq/Makefile | 1 + drivers/cpufreq/qcom-cpufreq.c | 48 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 57 insertions(+) create mode 100644 drivers/cpufreq/qcom-cpufreq.c diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm index 3129749..6ae884d 100644 --- a/drivers/cpufreq/Kconfig.arm +++ b/drivers/cpufreq/Kconfig.arm @@ -123,6 +123,14 @@ config ARM_OMAP2PLUS_CPUFREQ depends on ARCH_OMAP2PLUS default ARCH_OMAP2PLUS +config ARM_QCOM_CPUFREQ + tristate "Qualcomm based" + depends on ARCH_QCOM + help + This adds the CPUFreq driver for Qualcomm SoC based boards. + + If in doubt, say N. + config ARM_S3C_CPUFREQ bool help diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile index f6f4485..f5d18a3 100644 --- a/drivers/cpufreq/Makefile +++ b/drivers/cpufreq/Makefile @@ -60,6 +60,7 @@ obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6q-cpufreq.o obj-$(CONFIG_ARM_INTEGRATOR) += integrator-cpufreq.o obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ) += kirkwood-cpufreq.o obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ) += omap-cpufreq.o +obj-$(CONFIG_ARM_QCOM_CPUFREQ) += qcom-cpufreq.o obj-$(CONFIG_PXA25x) += pxa2xx-cpufreq.o obj-$(CONFIG_PXA27x) += pxa2xx-cpufreq.o obj-$(CONFIG_PXA3xx) += pxa3xx-cpufreq.o diff --git a/drivers/cpufreq/qcom-cpufreq.c b/drivers/cpufreq/qcom-cpufreq.c new file mode 100644 index 0000000..71f4387 --- /dev/null +++ b/drivers/cpufreq/qcom-cpufreq.c @@ -0,0 +1,48 @@ +/* Copyright (c) 2014, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include + +static int qcom_cpufreq_driver_init(void) +{ + struct platform_device_info devinfo = { .name = "cpufreq-krait", }; + struct device *cpu_dev; + struct device_node *np; + struct platform_device *pdev; + + cpu_dev = get_cpu_device(0); + if (!cpu_dev) + return -ENODEV; + + np = of_node_get(cpu_dev->of_node); + if (!np) + return -ENOENT; + + if (!of_device_is_compatible(np, "qcom,krait")) { + of_node_put(np); + return -ENODEV; + } + of_node_put(np); + + pdev = platform_device_register_full(&devinfo); + + return PTR_ERR_OR_ZERO(pdev); +} +module_init(qcom_cpufreq_driver_init); + +MODULE_DESCRIPTION("Qualcomm CPUfreq driver"); +MODULE_LICENSE("GPL v2"); -- 1.7.10.4