From: Jindong Yue <jindong.yue@nxp.com>

Change defconfig as tristate type and add platform driver
to support building it as a module.

Signed-off-by: Jindong Yue <jindong.yue@nxp.com>
Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>
---
 drivers/clocksource/Kconfig         |  2 +-
 drivers/clocksource/timer-imx-tpm.c | 36 ++++++++++++++++++++++++++---
 2 files changed, 34 insertions(+), 4 deletions(-)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 2112efb85029..1ba3e9bca3db 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -613,7 +613,7 @@ config CLKSRC_IMX_GPT
 	select CLKSRC_MMIO
 
 config CLKSRC_IMX_TPM
-	bool "Clocksource using i.MX TPM" if COMPILE_TEST
+	tristate "Clocksource using i.MX TPM"
 	depends on (ARM || ARM64) && HAVE_CLK
 	select CLKSRC_MMIO
 	select TIMER_OF
diff --git a/drivers/clocksource/timer-imx-tpm.c b/drivers/clocksource/timer-imx-tpm.c
index 92c025b70eb6..419d094459b2 100644
--- a/drivers/clocksource/timer-imx-tpm.c
+++ b/drivers/clocksource/timer-imx-tpm.c
@@ -8,6 +8,8 @@
 #include <linux/clocksource.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
 #include <linux/sched_clock.h>
 
 #include "timer-of.h"
@@ -152,7 +154,7 @@ static struct timer_of to_tpm = {
 	},
 };
 
-static int __init tpm_clocksource_init(void)
+static int tpm_clocksource_init(void)
 {
 #if defined(CONFIG_ARM)
 	tpm_delay_timer.read_current_timer = &tpm_read_current_timer;
@@ -171,7 +173,7 @@ static int __init tpm_clocksource_init(void)
 				     clocksource_mmio_readl_up);
 }
 
-static void __init tpm_clockevent_init(void)
+static void tpm_clockevent_init(void)
 {
 	clockevents_config_and_register(&to_tpm.clkevt,
 					timer_of_rate(&to_tpm) >> 3,
@@ -180,7 +182,7 @@ static void __init tpm_clockevent_init(void)
 					1));
 }
 
-static int __init tpm_timer_init(struct device_node *np)
+static int tpm_timer_init(struct device_node *np)
 {
 	struct clk *ipg;
 	int ret;
@@ -241,4 +243,32 @@ static int __init tpm_timer_init(struct device_node *np)
 
 	return tpm_clocksource_init();
 }
+#ifdef MODULE
+static int tpm_timer_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+
+	return tpm_timer_init(np);
+}
+
+static const struct of_device_id tpm_timer_match_table[] = {
+	{ .compatible = "fsl,imx7ulp-tpm" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, tpm_timer_match_table);
+
+static struct platform_driver tpm_timer_driver = {
+	.probe		= tpm_timer_probe,
+	.driver		= {
+		.name	= "tpm-timer",
+		.of_match_table = tpm_timer_match_table,
+	},
+};
+module_platform_driver(tpm_timer_driver);
+
+#else
 TIMER_OF_DECLARE(imx7ulp, "fsl,imx7ulp-tpm", tpm_timer_init);
+#endif
+
+MODULE_DESCRIPTION("i.MX TPM Timer Driver");
+MODULE_LICENSE("GPL");
-- 
2.34.1

Hi Zhipeng,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/timers/core]
[also build test WARNING on soc/for-next linus/master v7.0-rc2 next-20260304]
[cannot apply to daniel-lezcano/clockevents/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Zhipeng-Wang/clocksource-drivers-mmio-Export-clocksource_mmio_init/20260304-162226
base:   tip/timers/core
patch link:    https://lore.kernel.org/r/20260304081207.4030882-5-zhipeng.wang_1%40nxp.com
patch subject: [PATCH v4 4/4] clocksource/drivers/imx-tpm: Support building imx-tpm driver as module
config: arm-randconfig-001-20260305 (https://download.01.org/0day-ci/archive/20260305/202603052149.00j5uebB-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 9a109fbb6e184ec9bcce10615949f598f4c974a9)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260305/202603052149.00j5uebB-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202603052149.00j5uebB-lkp@intel.com/

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> WARNING: modpost: vmlinux: section mismatch in reference: tpm_timer_init+0x111 (section: .text) -> register_current_timer_delay (section: .init.text)

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki