@@ -191,6 +191,7 @@ config CPUFREQ_DT
depends on HAVE_CLK && OF
# if CPU_THERMAL is on and THERMAL=m, CPUFREQ_DT cannot be =y:
depends on !CPU_THERMAL || THERMAL
+ select CPUFREQ_DT_PLATDEV
select PM_OPP
help
This adds a generic DT based cpufreq driver for frequency management.
@@ -199,6 +200,16 @@ config CPUFREQ_DT
If in doubt, say N.
+config CPUFREQ_DT_PLATDEV
+ bool
+ depends on CPUFREQ_DT
+ help
+ This adds a generic DT based cpufreq platdev driver for frequency
+ management. This creates a 'cpufreq-dt' platform device, on the
+ supported platforms.
+
+ If in doubt, say N.
+
if X86
source "drivers/cpufreq/Kconfig.x86"
endif
@@ -13,6 +13,7 @@ obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative.o
obj-$(CONFIG_CPU_FREQ_GOV_COMMON) += cpufreq_governor.o
obj-$(CONFIG_CPUFREQ_DT) += cpufreq-dt.o
+obj-$(CONFIG_CPUFREQ_DT_PLATDEV) += cpufreq-dt-platdev.o
##################################################################################
# x86 drivers.
new file mode 100644
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2016 Linaro.
+ * Viresh Kumar <viresh.kumar@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.
+ */
+
+#include <linux/cpufreq-dt.h>
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+struct cpufreq_dt_compat {
+ const char *compatible;
+ const void *data;
+ size_t size;
+};
+
+static struct cpufreq_dt_compat compat[] = {
+};
+
+static int __init cpufreq_dt_platdev_init(void)
+{
+ struct platform_device *pdev;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(compat); i++) {
+ if (!of_machine_is_compatible(compat[i].compatible))
+ continue;
+
+ pdev = platform_device_register_data(NULL, "cpufreq-dt", -1,
+ compat[i].data,
+ compat[i].size);
+
+ return PTR_ERR_OR_ZERO(pdev);
+ }
+
+ return -ENODEV;
+}
+module_init(cpufreq_dt_platdev_init);
+
+MODULE_ALIAS("cpufreq-dt-platdev");
+MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
+MODULE_DESCRIPTION("cpufreq-dt platdev driver");
+MODULE_LICENSE("GPL");
Multiple platforms are using the generic cpufreq-dt driver now, and all of them are required to create a platform device with name "cpufreq-dt", in order to get the cpufreq-dt probed. Many of them do it from platform code, others have special drivers just to do that. It would be more sensible to do this at a generic place, where all such platform can mark their entries. This patch adds a separate file to get this device created. Currently the compat list of platforms that we support is empty, and will be filled in as and when we move platforms to use it. It always compiles as part of the kernel and so doesn't need a module-exit operation. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> --- drivers/cpufreq/Kconfig | 11 +++++++++ drivers/cpufreq/Makefile | 1 + drivers/cpufreq/cpufreq-dt-platdev.c | 48 ++++++++++++++++++++++++++++++++++++ 3 files changed, 60 insertions(+) create mode 100644 drivers/cpufreq/cpufreq-dt-platdev.c -- 2.7.1.410.g6faf27b -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html