[RESEND PATCH v3 2/3] clocksource/drivers/timer-of: Add a boilerplate macro for timer module driver

From: Chunyan Zhang
Date: Sun Sep 12 2021 - 23:29:12 EST


From: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx>

To support module build, platform driver structs, .probe(), match table and
module macros need to be added to the timer driver. So this patch provides
a macro to take care of these things, and that would reduce the repeat
code lines in every sigle driver.

Since timer module should support loading only, we use
builtin_platform_driver() which doesn't include module_exit() to make
sure timer modules wouldn't be unloaded.

Signed-off-by: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx>
---
drivers/clocksource/timer-of.c | 13 +++++++++++++
drivers/clocksource/timer-of.h | 15 +++++++++++++++
2 files changed, 28 insertions(+)

diff --git a/drivers/clocksource/timer-of.c b/drivers/clocksource/timer-of.c
index 7f108978fd51..ecd7f7379400 100644
--- a/drivers/clocksource/timer-of.c
+++ b/drivers/clocksource/timer-of.c
@@ -8,7 +8,9 @@
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/of_device.h>
#include <linux/of_irq.h>
+#include <linux/platform_device.h>
#include <linux/slab.h>

#include "timer-of.h"
@@ -229,3 +231,14 @@ void timer_of_cleanup(struct timer_of *to)
if (to->flags & TIMER_OF_BASE)
timer_of_base_exit(&to->of_base);
}
+
+int platform_timer_probe(struct platform_device *pdev)
+{
+ int (*init_cb)(struct device_node *node);
+ struct device_node *np = pdev->dev.of_node;
+
+ init_cb = of_device_get_match_data(&pdev->dev);
+
+ return init_cb(np);
+}
+EXPORT_SYMBOL_GPL(platform_timer_probe);
diff --git a/drivers/clocksource/timer-of.h b/drivers/clocksource/timer-of.h
index 1b8cfac5900a..04a476da01bb 100644
--- a/drivers/clocksource/timer-of.h
+++ b/drivers/clocksource/timer-of.h
@@ -3,6 +3,7 @@
#define __TIMER_OF_H__

#include <linux/clockchips.h>
+#include <linux/platform_device.h>

#define TIMER_OF_BASE 0x1
#define TIMER_OF_CLOCK 0x2
@@ -71,4 +72,18 @@ extern int timer_of_init(struct device_node *np,

extern void timer_of_cleanup(struct timer_of *to);

+extern int platform_timer_probe(struct platform_device *pdev);
+
+#define TIMER_PLATFORM_DECLEAR(desc, drv_name, table) \
+MODULE_DEVICE_TABLE(of, table); \
+static struct platform_driver drv_name##_driver = { \
+ .probe = platform_timer_probe, \
+ .driver = { \
+ .name = #drv_name, \
+ .of_match_table = table, \
+ }, \
+}; \
+builtin_platform_driver(drv_name##_driver); \
+MODULE_DESCRIPTION(desc); \
+MODULE_LICENSE("GPL")
#endif
--
2.25.1