Linux GPIO subsystem development
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* [PATCH] gpio: Convert to subsys_platform_driver()
@ 2026-11-04 11:33 Peng Fan (OSS)
  2026-11-04 11:48 ` Charles Keepax
  0 siblings, 1 reply; 2+ messages in thread
From: Peng Fan (OSS) @ 2026-11-04 11:33 UTC (permalink / raw)
  To: Adrian Ng, Linus Walleij, Bartosz Golaszewski, Support Opensource,
	Maxime Coquelin, Alexandre Torgue, Shubhrajyoti Datta,
	Srinivas Neeli, Michal Simek
  Cc: linux-gpio, linux-kernel, linux-stm32, linux-arm-kernel, patches

From: Peng Fan <peng.fan@nxp.com>

Replace the open-coded subsys_initcall()/module_exit() platform driver
registration with subsys_platform_driver().

No functional change.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/gpio/gpio-altera.c    | 13 +------------
 drivers/gpio/gpio-da9055.c    | 13 +------------
 drivers/gpio/gpio-mm-lantiq.c | 13 +------------
 drivers/gpio/gpio-palmas.c    | 13 +------------
 drivers/gpio/gpio-stmpe.c     | 13 +------------
 drivers/gpio/gpio-twl4030.c   | 13 +------------
 drivers/gpio/gpio-wm831x.c    | 13 +------------
 drivers/gpio/gpio-wm8350.c    | 13 +------------
 drivers/gpio/gpio-wm8994.c    | 13 +------------
 drivers/gpio/gpio-xilinx.c    | 13 +------------
 10 files changed, 10 insertions(+), 120 deletions(-)

diff --git a/drivers/gpio/gpio-altera.c b/drivers/gpio/gpio-altera.c
index a6ac9356229c..6c30608bff89 100644
--- a/drivers/gpio/gpio-altera.c
+++ b/drivers/gpio/gpio-altera.c
@@ -272,18 +272,7 @@ static struct platform_driver altera_gpio_driver = {
 	},
 	.probe		= altera_gpio_probe,
 };
-
-static int __init altera_gpio_init(void)
-{
-	return platform_driver_register(&altera_gpio_driver);
-}
-subsys_initcall(altera_gpio_init);
-
-static void __exit altera_gpio_exit(void)
-{
-	platform_driver_unregister(&altera_gpio_driver);
-}
-module_exit(altera_gpio_exit);
+subsys_platform_driver(altera_gpio_driver);
 
 MODULE_AUTHOR("Tien Hock Loh <thloh@altera.com>");
 MODULE_DESCRIPTION("Altera GPIO driver");
diff --git a/drivers/gpio/gpio-da9055.c b/drivers/gpio/gpio-da9055.c
index 1949a6ea8ec6..f9ff2f83ffed 100644
--- a/drivers/gpio/gpio-da9055.c
+++ b/drivers/gpio/gpio-da9055.c
@@ -150,18 +150,7 @@ static struct platform_driver da9055_gpio_driver = {
 		.name	= "da9055-gpio",
 	},
 };
-
-static int __init da9055_gpio_init(void)
-{
-	return platform_driver_register(&da9055_gpio_driver);
-}
-subsys_initcall(da9055_gpio_init);
-
-static void __exit da9055_gpio_exit(void)
-{
-	platform_driver_unregister(&da9055_gpio_driver);
-}
-module_exit(da9055_gpio_exit);
+subsys_platform_driver(da9055_gpio_driver);
 
 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
 MODULE_DESCRIPTION("DA9055 GPIO Device Driver");
diff --git a/drivers/gpio/gpio-mm-lantiq.c b/drivers/gpio/gpio-mm-lantiq.c
index 1bd98c50a459..2ddf63357127 100644
--- a/drivers/gpio/gpio-mm-lantiq.c
+++ b/drivers/gpio/gpio-mm-lantiq.c
@@ -146,15 +146,4 @@ static struct platform_driver ltq_mm_driver = {
 	},
 };
 
-static int __init ltq_mm_init(void)
-{
-	return platform_driver_register(&ltq_mm_driver);
-}
-
-subsys_initcall(ltq_mm_init);
-
-static void __exit ltq_mm_exit(void)
-{
-	platform_driver_unregister(&ltq_mm_driver);
-}
-module_exit(ltq_mm_exit);
+subsys_platform_driver(ltq_mm_driver);
diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c
index e64ee0487718..da699c419823 100644
--- a/drivers/gpio/gpio-palmas.c
+++ b/drivers/gpio/gpio-palmas.c
@@ -210,18 +210,7 @@ static struct platform_driver palmas_gpio_driver = {
 	.driver.of_match_table = of_palmas_gpio_match,
 	.probe		= palmas_gpio_probe,
 };
-
-static int __init palmas_gpio_init(void)
-{
-	return platform_driver_register(&palmas_gpio_driver);
-}
-subsys_initcall(palmas_gpio_init);
-
-static void __exit palmas_gpio_exit(void)
-{
-	platform_driver_unregister(&palmas_gpio_driver);
-}
-module_exit(palmas_gpio_exit);
+subsys_platform_driver(palmas_gpio_driver);
 
 MODULE_DESCRIPTION("TI PALMAS series GPIO driver");
 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index ccdf13a741b7..12b1778c4be9 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -545,18 +545,7 @@ static struct platform_driver stmpe_gpio_driver = {
 	},
 	.probe		= stmpe_gpio_probe,
 };
-
-static int __init stmpe_gpio_init(void)
-{
-	return platform_driver_register(&stmpe_gpio_driver);
-}
-subsys_initcall(stmpe_gpio_init);
-
-static void __exit stmpe_gpio_exit(void)
-{
-	platform_driver_unregister(&stmpe_gpio_driver);
-}
-module_exit(stmpe_gpio_exit);
+subsys_platform_driver(stmpe_gpio_driver);
 
 MODULE_DESCRIPTION("STMPE expander GPIO");
 MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");
diff --git a/drivers/gpio/gpio-twl4030.c b/drivers/gpio/gpio-twl4030.c
index a851702befde..6ea0be23ae7e 100644
--- a/drivers/gpio/gpio-twl4030.c
+++ b/drivers/gpio/gpio-twl4030.c
@@ -619,18 +619,7 @@ static struct platform_driver gpio_twl4030_driver = {
 	},
 	.probe		= gpio_twl4030_probe,
 };
-
-static int __init gpio_twl4030_init(void)
-{
-	return platform_driver_register(&gpio_twl4030_driver);
-}
-subsys_initcall(gpio_twl4030_init);
-
-static void __exit gpio_twl4030_exit(void)
-{
-	platform_driver_unregister(&gpio_twl4030_driver);
-}
-module_exit(gpio_twl4030_exit);
+subsys_platform_driver(gpio_twl4030_driver);
 
 MODULE_AUTHOR("Texas Instruments, Inc.");
 MODULE_DESCRIPTION("GPIO interface for TWL4030");
diff --git a/drivers/gpio/gpio-wm831x.c b/drivers/gpio/gpio-wm831x.c
index 489479d6f32b..b16aabcef57b 100644
--- a/drivers/gpio/gpio-wm831x.c
+++ b/drivers/gpio/gpio-wm831x.c
@@ -288,18 +288,7 @@ static struct platform_driver wm831x_gpio_driver = {
 	.driver.name	= "wm831x-gpio",
 	.probe		= wm831x_gpio_probe,
 };
-
-static int __init wm831x_gpio_init(void)
-{
-	return platform_driver_register(&wm831x_gpio_driver);
-}
-subsys_initcall(wm831x_gpio_init);
-
-static void __exit wm831x_gpio_exit(void)
-{
-	platform_driver_unregister(&wm831x_gpio_driver);
-}
-module_exit(wm831x_gpio_exit);
+subsys_platform_driver(wm831x_gpio_driver);
 
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 MODULE_DESCRIPTION("GPIO interface for WM831x PMICs");
diff --git a/drivers/gpio/gpio-wm8350.c b/drivers/gpio/gpio-wm8350.c
index 46923b23a72e..30936ec32b05 100644
--- a/drivers/gpio/gpio-wm8350.c
+++ b/drivers/gpio/gpio-wm8350.c
@@ -125,18 +125,7 @@ static struct platform_driver wm8350_gpio_driver = {
 	.driver.name	= "wm8350-gpio",
 	.probe		= wm8350_gpio_probe,
 };
-
-static int __init wm8350_gpio_init(void)
-{
-	return platform_driver_register(&wm8350_gpio_driver);
-}
-subsys_initcall(wm8350_gpio_init);
-
-static void __exit wm8350_gpio_exit(void)
-{
-	platform_driver_unregister(&wm8350_gpio_driver);
-}
-module_exit(wm8350_gpio_exit);
+subsys_platform_driver(wm8350_gpio_driver);
 
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 MODULE_DESCRIPTION("GPIO interface for WM8350 PMICs");
diff --git a/drivers/gpio/gpio-wm8994.c b/drivers/gpio/gpio-wm8994.c
index a0665cf3ff2f..d0c418bc6e03 100644
--- a/drivers/gpio/gpio-wm8994.c
+++ b/drivers/gpio/gpio-wm8994.c
@@ -288,18 +288,7 @@ static struct platform_driver wm8994_gpio_driver = {
 	.driver.name	= "wm8994-gpio",
 	.probe		= wm8994_gpio_probe,
 };
-
-static int __init wm8994_gpio_init(void)
-{
-	return platform_driver_register(&wm8994_gpio_driver);
-}
-subsys_initcall(wm8994_gpio_init);
-
-static void __exit wm8994_gpio_exit(void)
-{
-	platform_driver_unregister(&wm8994_gpio_driver);
-}
-module_exit(wm8994_gpio_exit);
+subsys_platform_driver(wm8994_gpio_driver);
 
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 MODULE_DESCRIPTION("GPIO interface for WM8994");
diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c
index 9406ce85f933..e7c483f93d9d 100644
--- a/drivers/gpio/gpio-xilinx.c
+++ b/drivers/gpio/gpio-xilinx.c
@@ -676,18 +676,7 @@ static struct platform_driver xgpio_plat_driver = {
 	},
 };
 
-static int __init xgpio_init(void)
-{
-	return platform_driver_register(&xgpio_plat_driver);
-}
-
-subsys_initcall(xgpio_init);
-
-static void __exit xgpio_exit(void)
-{
-	platform_driver_unregister(&xgpio_plat_driver);
-}
-module_exit(xgpio_exit);
+subsys_platform_driver(xgpio_plat_driver);
 
 MODULE_AUTHOR("Xilinx, Inc.");
 MODULE_DESCRIPTION("Xilinx GPIO driver");
-- 
2.51.0


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2026-11-04 11:33 [PATCH] gpio: Convert to subsys_platform_driver() Peng Fan (OSS)
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