[PATCH 1/4] devfreq: exynos4: Support devicetree to get device id of Exynos4 SoC

Chanwoo Choi
2014-03-12T11:48:22Z

This patch support DT(DeviceTree) method to probe exynos4_bus and get device
id of each Exynos4 SoC by using dt helper function.

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
drivers/devfreq/exynos/exynos4_bus.c | 26 +++++++++++++++++++++++++-
1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/devfreq/exynos/exynos4_bus.c b/drivers/devfreq/exynos/exynos4_bus.c
index e07b0c6..168a7c6 100644
--- a/drivers/devfreq/exynos/exynos4_bus.c
+++ b/drivers/devfreq/exynos/exynos4_bus.c
@@ -23,6 +23,7 @@
#include <linux/devfreq.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
+#include <linux/of.h>
#include <linux/module.h>

/* Exynos4 ASV has been in the mailing list, but not upstreamed, yet. */
@@ -1017,6 +1018,28 @@ unlock:
return NOTIFY_DONE;
}

+static struct of_device_id exynos4_busfreq_id_match[] = {
+ {
+ .compatible = "samsung,exynos4210-busfreq",
+ .data = (void *)TYPE_BUSF_EXYNOS4210,
+ }, {
+ .compatible = "samsung,exynos4x12-busfreq",
+ .data = (void *)TYPE_BUSF_EXYNOS4x12,
+ },
+};
+
+static int exynos4_busfreq_get_driver_data(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ const struct of_device_id *match;
+
+ match = of_match_node(exynos4_busfreq_id_match, dev->of_node);
+ if (!match)
+ return -ENODEV;
+
+ return (int) match->data;
+}
+
static int exynos4_busfreq_probe(struct platform_device *pdev)
{
struct busfreq_data *data;
@@ -1030,7 +1053,7 @@ static int exynos4_busfreq_probe(struct platform_device *pdev)
return -ENOMEM;
}

- data->type = pdev->id_entry->driver_data;
+ data->type = exynos4_busfreq_get_driver_data(pdev);
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;
@@ -1135,6 +1158,7 @@ static struct platform_driver exynos4_busfreq_driver = {
.name = "exynos4-busfreq",
.owner = THIS_MODULE,
.pm = &exynos4_busfreq_pm,
+ .of_match_table = exynos4_busfreq_id_match,
},
};

--
1.8.0