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Message-ID: <20250610143042.295376-5-antonio.borneo@foss.st.com>
Date: Tue, 10 Jun 2025 16:30:41 +0200
From: Antonio Borneo <antonio.borneo@...s.st.com>
To: Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Alexandre Torgue
<alexandre.torgue@...s.st.com>,
<linux-kernel@...r.kernel.org>, <linux-gpio@...r.kernel.org>
CC: Antonio Borneo <antonio.borneo@...s.st.com>,
Maxime Coquelin
<mcoquelin.stm32@...il.com>,
Clément Le Goffic
<clement.legoffic@...s.st.com>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-stm32@...md-mailman.stormreply.com>,
Stephane Danieau
<stephane.danieau@...s.st.com>
Subject: [PATCH v2 4/5] pinctrl: stm32: Allow compile as module for stm32mp257
From: Stephane Danieau <stephane.danieau@...s.st.com>
Add ability to build pinctrl for stm32mp257 as a kernel module.
Add kernel-doc to the exported symbols.
Signed-off-by: Stephane Danieau <stephane.danieau@...s.st.com>
Signed-off-by: Antonio Borneo <antonio.borneo@...s.st.com>
---
arch/arm64/Kconfig.platforms | 1 -
drivers/pinctrl/stm32/Kconfig | 6 +++---
drivers/pinctrl/stm32/pinctrl-stm32.c | 8 ++++++++
drivers/pinctrl/stm32/pinctrl-stm32.h | 14 ++++++++++++++
drivers/pinctrl/stm32/pinctrl-stm32mp257.c | 11 ++++++-----
5 files changed, 31 insertions(+), 9 deletions(-)
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index a541bb029aa4e..d6cfcfad26e47 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -311,7 +311,6 @@ config ARCH_STM32
bool "STMicroelectronics STM32 SoC Family"
select GPIOLIB
select PINCTRL
- select PINCTRL_STM32MP257
select ARM_SMC_MBOX
select ARM_SCMI_PROTOCOL
select REGULATOR
diff --git a/drivers/pinctrl/stm32/Kconfig b/drivers/pinctrl/stm32/Kconfig
index 2656d3d3ae402..297a2f088bc1f 100644
--- a/drivers/pinctrl/stm32/Kconfig
+++ b/drivers/pinctrl/stm32/Kconfig
@@ -2,7 +2,7 @@
if ARCH_STM32 || COMPILE_TEST
config PINCTRL_STM32
- bool
+ tristate
depends on OF
select PINMUX
select GENERIC_PINCONF
@@ -53,8 +53,8 @@ config PINCTRL_STM32MP157
select PINCTRL_STM32
config PINCTRL_STM32MP257
- bool "STMicroelectronics STM32MP257 pin control" if COMPILE_TEST && !MACH_STM32MP25
+ tristate "STMicroelectronics STM32MP257 pin control"
depends on OF && HAS_IOMEM
- default MACH_STM32MP25
+ default MACH_STM32MP25 || (ARCH_STM32 && ARM64)
select PINCTRL_STM32
endif
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.c b/drivers/pinctrl/stm32/pinctrl-stm32.c
index e7621f9b00056..ce2a5fee42303 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.c
@@ -8,6 +8,7 @@
*/
#include <linux/bitfield.h>
#include <linux/clk.h>
+#include <linux/export.h>
#include <linux/gpio/driver.h>
#include <linux/hwspinlock.h>
#include <linux/io.h>
@@ -1785,6 +1786,7 @@ int stm32_pctl_probe(struct platform_device *pdev)
clk_bulk_disable_unprepare(banks, pctl->clks);
return ret;
}
+EXPORT_SYMBOL(stm32_pctl_probe);
static int __maybe_unused stm32_pinctrl_restore_gpio_regs(
struct stm32_pinctrl *pctl, u32 pin)
@@ -1857,6 +1859,7 @@ int __maybe_unused stm32_pinctrl_suspend(struct device *dev)
return 0;
}
+EXPORT_SYMBOL(stm32_pinctrl_suspend);
int __maybe_unused stm32_pinctrl_resume(struct device *dev)
{
@@ -1873,3 +1876,8 @@ int __maybe_unused stm32_pinctrl_resume(struct device *dev)
return 0;
}
+EXPORT_SYMBOL(stm32_pinctrl_resume);
+
+MODULE_AUTHOR("Alexandre Torgue <alexandre.torgue@...s.st.com>");
+MODULE_DESCRIPTION("STM32 core pinctrl driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32.h b/drivers/pinctrl/stm32/pinctrl-stm32.h
index ed525f5bdd7cd..9e44ad8c35b35 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32.h
+++ b/drivers/pinctrl/stm32/pinctrl-stm32.h
@@ -66,8 +66,22 @@ struct stm32_pinctrl_match_data {
bool rif_control;
};
+/**
+ * stm32_pctl_probe() - Common probe for stm32 pinctrl drivers.
+ * @pdev: Pinctrl platform device.
+ */
int stm32_pctl_probe(struct platform_device *pdev);
+
+/**
+ * stm32_pinctrl_suspend() - Common suspend for stm32 pinctrl drivers.
+ * @dev: Pinctrl device.
+ */
int stm32_pinctrl_suspend(struct device *dev);
+
+/**
+ * stm32_pinctrl_resume() - Common resume for stm32 pinctrl drivers.
+ * @dev: Pinctrl device.
+ */
int stm32_pinctrl_resume(struct device *dev);
#endif /* __PINCTRL_STM32_H */
diff --git a/drivers/pinctrl/stm32/pinctrl-stm32mp257.c b/drivers/pinctrl/stm32/pinctrl-stm32mp257.c
index 984587207956a..d226de524bfc1 100644
--- a/drivers/pinctrl/stm32/pinctrl-stm32mp257.c
+++ b/drivers/pinctrl/stm32/pinctrl-stm32mp257.c
@@ -4,6 +4,7 @@
* Author: Alexandre Torgue <alexandre.torgue@...s.st.com> for STMicroelectronics.
*/
#include <linux/init.h>
+#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
@@ -2564,6 +2565,7 @@ static const struct of_device_id stm32mp257_pctrl_match[] = {
},
{ }
};
+MODULE_DEVICE_TABLE(of, stm32mp257_pctrl_match);
static const struct dev_pm_ops stm32_pinctrl_dev_pm_ops = {
SET_LATE_SYSTEM_SLEEP_PM_OPS(stm32_pinctrl_suspend, stm32_pinctrl_resume)
@@ -2577,9 +2579,8 @@ static struct platform_driver stm32mp257_pinctrl_driver = {
.pm = &stm32_pinctrl_dev_pm_ops,
},
};
+module_platform_driver(stm32mp257_pinctrl_driver);
-static int __init stm32mp257_pinctrl_init(void)
-{
- return platform_driver_register(&stm32mp257_pinctrl_driver);
-}
-arch_initcall(stm32mp257_pinctrl_init);
+MODULE_AUTHOR("Alexandre Torgue <alexandre.torgue@...s.st.com>");
+MODULE_DESCRIPTION("STM32MP257 pinctrl driver");
+MODULE_LICENSE("GPL");
--
2.34.1
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