linux-kernel - [PATCH v2 2/3] clocksource/drivers/timer-of: Add boilerplate macros for timer module driver

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Message-Id: <20210715065455.392923-3-zhang.lyra@gmail.com>
Date:   Thu, 15 Jul 2021 14:54:54 +0800
From:   Chunyan Zhang <zhang.lyra@...il.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     Saravana Kannan <saravanak@...gle.com>,
        Baolin Wang <baolin.wang7@...il.com>,
        Orson Zhai <orsonzhai@...il.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        Chunyan Zhang <chunyan.zhang@...soc.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/3] clocksource/drivers/timer-of: Add boilerplate macros for timer module driver

From: Chunyan Zhang <chunyan.zhang@...soc.com>

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 few macros to take care of these things, and that would reduce the repeat
code lines in every sigle driver.

Signed-off-by: Chunyan Zhang <chunyan.zhang@...soc.com>
---
 drivers/clocksource/timer-of.c | 13 +++++++++++++
 drivers/clocksource/timer-of.h | 20 ++++++++++++++++++++
 2 files changed, 33 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..129f539d5f54 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 +72,23 @@ 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_DRIVER_BEGIN(drv_name)	\
+static const struct of_device_id drv_name##_timer_match_table[] = {
+
+#define TIMER_MATCH(compat, _data) { .compatible = compat, .data = _data },
+
+#define TIMER_PLATFORM_DRIVER_END(drv_name)			\
+	{},							\
+};								\
+MODULE_DEVICE_TABLE(of, drv_name##_timer_match_table);		\
+static struct platform_driver drv_name##_driver = {		\
+	.probe  = platform_timer_probe,				\
+	.driver = {						\
+		.name = #drv_name,				\
+		.of_match_table = drv_name##_timer_match_table,	\
+	},							\
+};								\
+module_platform_driver(drv_name##_driver)
 #endif
-- 
2.25.1