linux-kernel - [PATCH v3] gpio: palmas: Allow building as a module

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Message-Id: <20250702-gpio-palmas-gpio-v3-1-e04633e0bc54@gmail.com>
Date: Wed, 02 Jul 2025 00:56:26 -0500
From: Aaron Kling via B4 Relay <devnull+webgeek1234.gmail.com@...nel.org>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Aaron Kling <webgeek1234@...il.com>
Subject: [PATCH v3] gpio: palmas: Allow building as a module

From: Aaron Kling <webgeek1234@...il.com>

The driver works fine as a module, so allowing building as such. This
adds an exit handler to support module unload.

Signed-off-by: Aaron Kling <webgeek1234@...il.com>
---
Changes in v3:
- Drop use of module init macro and add exit handler
- Link to v2: https://lore.kernel.org/r/20250522-gpio-palmas-gpio-v2-1-89f209d4a949@gmail.com

Changes in v2:
- Drop module alias and add module device table
- Link to v1: https://lore.kernel.org/r/20250522-gpio-palmas-gpio-v1-1-d6b1a3776ef5@gmail.com
---
 drivers/gpio/Kconfig       |  2 +-
 drivers/gpio/gpio-palmas.c | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index f2c39bbff83a33dcb12b2d32aa3ebc358a0dd949..be5d823516d0e2bff4b4231dac6a82bf10887118 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1464,7 +1464,7 @@ config GPIO_MAX77650
 	  These chips have a single pin that can be configured as GPIO.
 
 config GPIO_PALMAS
-	bool "TI PALMAS series PMICs GPIO"
+	tristate "TI PALMAS series PMICs GPIO"
 	depends on MFD_PALMAS
 	help
 	  Select this option to enable GPIO driver for the TI PALMAS
diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c
index 28dba7048509a3ef9c7972c1be53ea30adddabb0..232b3ac52b3362c33ea8b068d5932f682816a5e4 100644
--- a/drivers/gpio/gpio-palmas.c
+++ b/drivers/gpio/gpio-palmas.c
@@ -140,6 +140,7 @@ static const struct of_device_id of_palmas_gpio_match[] = {
 	{ .compatible = "ti,tps80036-gpio", .data = &tps80036_dev_data,},
 	{ },
 };
+MODULE_DEVICE_TABLE(of, of_palmas_gpio_match);
 
 static int palmas_gpio_probe(struct platform_device *pdev)
 {
@@ -197,3 +198,13 @@ 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);
+
+MODULE_DESCRIPTION("TI PALMAS series GPIO driver");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@...dia.com>");
+MODULE_LICENSE("GPL");

---
base-commit: b36ddb9210e6812eb1c86ad46b66cc46aa193487
change-id: 20250520-gpio-palmas-gpio-a99fc046dc7f

Best regards,
-- 
Aaron Kling <webgeek1234@...il.com>