cpufreq: SPEAr: Instantiate as platform_driver
As multiplatform build is being adopted by more and more ARM platforms, initcall function should be used very carefully. For example, when SPEAr cpufreq driver is enabled on a kernel booted on a non-SPEAr board, we will get following boot time error: spear_cpufreq: Invalid cpufreq_tbl To eliminate this undesired the effect, the patch changes SPEAr driver to have it instantiated as a platform_driver. Then it will only run on platforms that create the platform_device "spear-cpufreq". This patch also creates platform node for SPEAr13xx boards. Reported-by: Josh Cartwright <joshc@codeaurora.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -28,6 +28,7 @@
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static void __init spear1310_dt_init(void)
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{
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of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
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platform_device_register_simple("spear-cpufreq", -1, NULL, 0);
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}
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static const char * const spear1310_dt_board_compat[] = {
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@ -143,6 +143,7 @@ static void __init spear1340_dt_init(void)
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{
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of_platform_populate(NULL, of_default_bus_match_table,
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spear1340_auxdata_lookup, NULL);
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platform_device_register_simple("spear-cpufreq", -1, NULL, 0);
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}
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static const char * const spear1340_dt_board_compat[] = {
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@ -19,6 +19,7 @@
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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@ -166,7 +167,7 @@ static struct cpufreq_driver spear_cpufreq_driver = {
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.attr = cpufreq_generic_attr,
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};
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static int spear_cpufreq_driver_init(void)
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static int spear_cpufreq_probe(struct platform_device *pdev)
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{
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struct device_node *np;
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const struct property *prop;
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@ -234,7 +235,15 @@ out_put_node:
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of_node_put(np);
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return ret;
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}
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late_initcall(spear_cpufreq_driver_init);
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static struct platform_driver spear_cpufreq_platdrv = {
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.driver = {
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.name = "spear-cpufreq",
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.owner = THIS_MODULE,
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},
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.probe = spear_cpufreq_probe,
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};
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module_platform_driver(spear_cpufreq_platdrv);
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MODULE_AUTHOR("Deepak Sikri <deepak.sikri@st.com>");
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MODULE_DESCRIPTION("SPEAr CPUFreq driver");
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