diff mbox series

[V2,RESEND,1/4] gpio: mxc: Support module build

Message ID 1600054147-29997-1-git-send-email-Anson.Huang@nxp.com
State New
Headers show
Series [V2,RESEND,1/4] gpio: mxc: Support module build | expand

Commit Message

Anson Huang Sept. 14, 2020, 3:29 a.m. UTC
Change config to tristate, add module device table, module author,
description and license to support module build for i.MX GPIO driver.

As this is a SoC GPIO module, it provides common functions for most
of the peripheral devices, such as GPIO pins control, secondary
interrupt controller for GPIO pins IRQ etc., without GPIO driver, most
of the peripheral devices will NOT work properly, so GPIO module is
similar with clock, pinctrl driver that should be loaded ONCE and
never unloaded.

Since MXC GPIO driver needs to have init function to register syscore
ops once, here still use subsys_initcall(), NOT module_platform_driver().

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Changes since V1:
	- no code change, just add detail explanation about why this patch
	  does NOT support module unloaded.
 drivers/gpio/Kconfig    | 2 +-
 drivers/gpio/gpio-mxc.c | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)
diff mbox series


diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 5cfdaf3..c7292a5 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -397,7 +397,7 @@  config GPIO_MVEBU
 	select REGMAP_MMIO
 config GPIO_MXC
-	def_bool y
+	tristate "i.MX GPIO support"
 	depends on ARCH_MXC || COMPILE_TEST
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index 64278a4..643f4c55 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -15,6 +15,7 @@ 
 #include <linux/irq.h>
 #include <linux/irqdomain.h>
 #include <linux/irqchip/chained_irq.h>
+#include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/syscore_ops.h>
@@ -158,6 +159,7 @@  static const struct of_device_id mxc_gpio_dt_ids[] = {
 	{ .compatible = "fsl,imx7d-gpio", .data = &mxc_gpio_devtype[IMX35_GPIO], },
 	{ /* sentinel */ }
+MODULE_DEVICE_TABLE(of, mxc_gpio_dt_ids);
  * MX2 has one interrupt *for all* gpio ports. The list is used
@@ -604,3 +606,7 @@  static int __init gpio_mxc_init(void)
 	return platform_driver_register(&mxc_gpio_driver);
+MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");