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From f1db56284b01b1212a211023dcaa7846fd07d0ec Mon Sep 17 00:00:00 2001
From: Stephen Boyd <sboyd@codeaurora.org>
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 <sboyd@codeaurora.org>
---
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
--- 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
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_ARM_IMX6Q_CPUFREQ) += imx6
obj-$(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
--- /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 <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/cpu.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+
+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");
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