devfreq: exynos4: Support DT in exynos4 busfreq driver.

This patch makes exynos4 busfreq driver to support device tree.

Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com>

diff --git a/drivers/devfreq/exynos4_bus.c b/drivers/devfreq/exynos4_bus.c
index 3f37f3b..7319e81 100644 (file)
--- a/drivers/devfreq/exynos4_bus.c
+++ b/drivers/devfreq/exynos4_bus.c
@@ -24,6 +24,7 @@
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/module.h>
+#include <linux/of.h>
 
 /* Exynos4 ASV has been in the mailing list, but not upstreamed, yet. */
 #ifdef CONFIG_EXYNOS_ASV
@@ -1016,12 +1017,28 @@ unlock:
        return NOTIFY_DONE;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id exynos4_busfreq_match[] = {
+       {
+               .compatible = "samsung,exynos4210-busfreq",
+               .data = (void *)TYPE_BUSF_EXYNOS4210,
+       },
+       {
+               .compatible = "samsung,exynos4x12-busfreq",
+               .data = (void *)TYPE_BUSF_EXYNOS4x12,
+       },
+};
+MODULE_DEVICE_TABLE(of, exynos4_busfreq_match[]);
+#else
+#define exynos4_busfreq_match  NULL
+#endif
+
 static int exynos4_busfreq_probe(struct platform_device *pdev)
 {
        struct busfreq_data *data;
        struct opp *opp;
        struct device *dev = &pdev->dev;
-       int err = 0;
+       int type, err = 0;
 
        data = devm_kzalloc(&pdev->dev, sizeof(struct busfreq_data), GFP_KERNEL);
        if (data == NULL) {
@@ -1029,11 +1046,20 @@ static int exynos4_busfreq_probe(struct platform_device *pdev)
                return -ENOMEM;
        }
 
-       data->type = pdev->id_entry->driver_data;
+       if (dev->of_node) {
+               const struct of_device_id *match;
+               match = of_match_node(exynos4_busfreq_match, dev->of_node);
+               type = (int) match->data;
+       } else {
+               type = pdev->id_entry->driver_data;
+       }
+
+       data->type = type;
        data->dmc[0].hw_base = S5P_VA_DMC0;
        data->dmc[1].hw_base = S5P_VA_DMC1;
        data->pm_notifier.notifier_call = exynos4_busfreq_pm_notifier_event;
        data->dev = dev;
+
        mutex_init(&data->lock);
 
        switch (data->type) {
@@ -1133,6 +1159,7 @@ static struct platform_driver exynos4_busfreq_driver = {
                .name   = "exynos4-busfreq",
                .owner  = THIS_MODULE,
                .pm     = &exynos4_busfreq_pm,
+               .of_match_table = of_match_ptr(exynos4_busfreq_match),
        },
 };