linux-kernel - [PATCH v3 3/3] clocksource/drivers/sprd: Add module support to Unisoc timer

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Message-Id: <20210820100240.1893457-1-zhang.lyra@gmail.com>
Date:   Fri, 20 Aug 2021 18:02:40 +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 v3 3/3] clocksource/drivers/sprd: Add module support to Unisoc timer

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

Timers still have devices created for them. So, when compiling a timer
driver as a module, implement it as a normal platform device driver.

Original-by: Baolin Wang <baolin.wang7@...il.com>
Signed-off-by: Chunyan Zhang <chunyan.zhang@...soc.com>
---
 drivers/clocksource/Kconfig      |  2 +-
 drivers/clocksource/timer-sprd.c | 18 +++++++++++++-----
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index eb661b539a3e..a5a5b7c883ec 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -461,7 +461,7 @@ config MTK_TIMER
 	  Support for Mediatek timer driver.
 
 config SPRD_TIMER
-	bool "Spreadtrum timer driver" if EXPERT
+	tristate "Spreadtrum timer driver" if EXPERT
 	depends on HAS_IOMEM
 	depends on (ARCH_SPRD || COMPILE_TEST)
 	default ARCH_SPRD
diff --git a/drivers/clocksource/timer-sprd.c b/drivers/clocksource/timer-sprd.c
index 430cb99d8d79..b29c48ef3ba5 100644
--- a/drivers/clocksource/timer-sprd.c
+++ b/drivers/clocksource/timer-sprd.c
@@ -5,6 +5,8 @@
 
 #include <linux/init.h>
 #include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
 
 #include "timer-of.h"
 
@@ -141,7 +143,7 @@ static struct timer_of to = {
 	},
 };
 
-static int __init sprd_timer_init(struct device_node *np)
+static int sprd_timer_init(struct device_node *np)
 {
 	int ret;
 
@@ -190,7 +192,7 @@ static struct clocksource suspend_clocksource = {
 	.flags	= CLOCK_SOURCE_IS_CONTINUOUS | CLOCK_SOURCE_SUSPEND_NONSTOP,
 };
 
-static int __init sprd_suspend_timer_init(struct device_node *np)
+static int sprd_suspend_timer_init(struct device_node *np)
 {
 	int ret;
 
@@ -204,6 +206,12 @@ static int __init sprd_suspend_timer_init(struct device_node *np)
 	return 0;
 }
 
-TIMER_OF_DECLARE(sc9860_timer, "sprd,sc9860-timer", sprd_timer_init);
-TIMER_OF_DECLARE(sc9860_persistent_timer, "sprd,sc9860-suspend-timer",
-		 sprd_suspend_timer_init);
+static const struct of_device_id sc9860_timer_match_table[] = {
+	{ .compatible = "sprd,sc9860-timer",
+		.data = sprd_timer_init },
+	{ .compatible = "sprd,sc9860-suspend-timer",
+		.data = sprd_suspend_timer_init },
+	{},
+};
+TIMER_PLATFORM_DECLEAR("Unisoc broadcast timer module", sc9860_timer,
+		       sc9860_timer_match_table);
-- 
2.25.1