target/linux/ipq806x/patches/0173-cpufreq-Add-module-to-register-cpufreq-krait-device.patch

   1 From f1db56284b01b1212a211023dcaa7846fd07d0ec Mon Sep 17 00:00:00 2001
   2 From: Stephen Boyd <sboyd@codeaurora.org>
   3 Date: Fri, 30 May 2014 17:16:53 -0700
   4 Subject: [PATCH 173/182] cpufreq: Add module to register cpufreq-krait device
   5
   6 Register a cpufreq-krait device whenever we detect that a
   7 "qcom,krait" compatible CPU is present in DT.
   8
   9 Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
  10 ---
  11  drivers/cpufreq/Kconfig.arm    |    8 +++++++
  12  drivers/cpufreq/Makefile       |    1 +
  13  drivers/cpufreq/qcom-cpufreq.c |   48 ++++++++++++++++++++++++++++++++++++++++
  14  3 files changed, 57 insertions(+)
  15  create mode 100644 drivers/cpufreq/qcom-cpufreq.c
  16
  17 diff --git a/drivers/cpufreq/Kconfig.arm b/drivers/cpufreq/Kconfig.arm
  18 index 3129749..6ae884d 100644
  19 --- a/drivers/cpufreq/Kconfig.arm
  20 +++ b/drivers/cpufreq/Kconfig.arm
  21 @@ -123,6 +123,14 @@ config ARM_OMAP2PLUS_CPUFREQ
  22         depends on ARCH_OMAP2PLUS
  23         default ARCH_OMAP2PLUS
  24
  25 +config ARM_QCOM_CPUFREQ
  26 +       tristate "Qualcomm based"
  27 +       depends on ARCH_QCOM
  28 +       help
  29 +         This adds the CPUFreq driver for Qualcomm SoC based boards.
  30 +
  31 +         If in doubt, say N.
  32 +
  33  config ARM_S3C_CPUFREQ
  34         bool
  35         help
  36 diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
  37 index f6f4485..f5d18a3 100644
  38 --- a/drivers/cpufreq/Makefile
  39 +++ b/drivers/cpufreq/Makefile
  40 @@ -60,6 +60,7 @@ obj-$(CONFIG_ARM_IMX6Q_CPUFREQ)               += imx6q-cpufreq.o
  41  obj-$(CONFIG_ARM_INTEGRATOR)           += integrator-cpufreq.o
  42  obj-$(CONFIG_ARM_KIRKWOOD_CPUFREQ)     += kirkwood-cpufreq.o
  43  obj-$(CONFIG_ARM_OMAP2PLUS_CPUFREQ)    += omap-cpufreq.o
  44 +obj-$(CONFIG_ARM_QCOM_CPUFREQ)         += qcom-cpufreq.o
  45  obj-$(CONFIG_PXA25x)                   += pxa2xx-cpufreq.o
  46  obj-$(CONFIG_PXA27x)                   += pxa2xx-cpufreq.o
  47  obj-$(CONFIG_PXA3xx)                   += pxa3xx-cpufreq.o
  48 diff --git a/drivers/cpufreq/qcom-cpufreq.c b/drivers/cpufreq/qcom-cpufreq.c
  49 new file mode 100644
  50 index 0000000..71f4387
  51 --- /dev/null
  52 +++ b/drivers/cpufreq/qcom-cpufreq.c
  53 @@ -0,0 +1,48 @@
  54 +/* Copyright (c) 2014, The Linux Foundation. All rights reserved.
  55 + *
  56 + * This program is free software; you can redistribute it and/or modify
  57 + * it under the terms of the GNU General Public License version 2 and
  58 + * only version 2 as published by the Free Software Foundation.
  59 + *
  60 + * This program is distributed in the hope that it will be useful,
  61 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  62 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  63 + * GNU General Public License for more details.
  64 + */
  65 +
  66 +#include <linux/kernel.h>
  67 +#include <linux/module.h>
  68 +#include <linux/cpu.h>
  69 +#include <linux/of.h>
  70 +#include <linux/platform_device.h>
  71 +#include <linux/err.h>
  72 +
  73 +static int qcom_cpufreq_driver_init(void)
  74 +{
  75 +       struct platform_device_info devinfo = { .name = "cpufreq-krait", };
  76 +       struct device *cpu_dev;
  77 +       struct device_node *np;
  78 +       struct platform_device *pdev;
  79 +
  80 +       cpu_dev = get_cpu_device(0);
  81 +       if (!cpu_dev)
  82 +               return -ENODEV;
  83 +
  84 +       np = of_node_get(cpu_dev->of_node);
  85 +       if (!np)
  86 +               return -ENOENT;
  87 +
  88 +       if (!of_device_is_compatible(np, "qcom,krait")) {
  89 +               of_node_put(np);
  90 +               return -ENODEV;
  91 +       }
  92 +       of_node_put(np);
  93 +
  94 +       pdev = platform_device_register_full(&devinfo);
  95 +
  96 +       return PTR_ERR_OR_ZERO(pdev);
  97 +}
  98 +module_init(qcom_cpufreq_driver_init);
  99 +
 100 +MODULE_DESCRIPTION("Qualcomm CPUfreq driver");
 101 +MODULE_LICENSE("GPL v2");
 102 --
 103 1.7.10.4
 104