[PATCH v5 4/4] clocksource/drivers/timer-mediatek: Make timer-mediatek become loadable module

From: walter.chang
Date: Tue May 16 2023 - 22:27:55 EST


From: Chun-Hung Wu <chun-hung.wu@xxxxxxxxxxxx>

Make the timer-mediatek driver which can register
an always-on timer as tick_broadcast_device on
MediaTek SoCs become loadable module in GKI.

Signed-off-by: Chun-Hung Wu <chun-hung.wu@xxxxxxxxxxxx>
Signed-off-by: Walter Chang <walter.chang@xxxxxxxxxxxx>
Tested-by: Walter Chang <walter.chang@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
---
drivers/clocksource/Kconfig | 2 +-
drivers/clocksource/timer-mediatek.c | 33 ++++++++++++++++++++++++++++
2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 526382dc7482..62103c0807f7 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -472,7 +472,7 @@ config SYS_SUPPORTS_SH_CMT
bool

config MTK_TIMER
- bool "Mediatek timer driver" if COMPILE_TEST
+ tristate "MediaTek timer driver"
depends on HAS_IOMEM
select TIMER_OF
select CLKSRC_MMIO
diff --git a/drivers/clocksource/timer-mediatek.c b/drivers/clocksource/timer-mediatek.c
index 7bcb4a3f26fb..afeacb509481 100644
--- a/drivers/clocksource/timer-mediatek.c
+++ b/drivers/clocksource/timer-mediatek.c
@@ -13,6 +13,9 @@
#include <linux/clocksource.h>
#include <linux/interrupt.h>
#include <linux/irqreturn.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
#include <linux/sched_clock.h>
#include <linux/slab.h>
#include "timer-of.h"
@@ -337,5 +340,35 @@ static int __init mtk_gpt_init(struct device_node *node)

return 0;
}
+
+#ifndef MODULE
TIMER_OF_DECLARE(mtk_mt6577, "mediatek,mt6577-timer", mtk_gpt_init);
TIMER_OF_DECLARE(mtk_mt6765, "mediatek,mt6765-timer", mtk_syst_init);
+#else
+static int mtk_timer_probe(struct platform_device *pdev)
+{
+ int (*timer_init)(struct device_node *node);
+ struct device_node *np = pdev->dev.of_node;
+
+ timer_init = of_device_get_match_data(&pdev->dev);
+ return timer_init(np);
+}
+
+static const struct of_device_id mtk_timer_match_table[] = {
+ { .compatible = "mediatek,mt6577-timer", .data = mtk_gpt_init },
+ { .compatible = "mediatek,mt6765-timer", .data = mtk_syst_init },
+ { /* sentinel */ }
+};
+
+static struct platform_driver mtk_timer_driver = {
+ .probe = mtk_timer_probe,
+ .driver = {
+ .name = "mediatek-timer",
+ .of_match_table = mtk_timer_match_table,
+ },
+};
+module_platform_driver(mtk_timer_driver);
+
+MODULE_DESCRIPTION("MediaTek Timer driver");
+MODULE_LICENSE("GPL v2");
+#endif
--
2.18.0