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gpio: mxc: Support module build 

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>
Link: https://lore.kernel.org/r/1600320829-1453-1-git-send-email-Anson.Huang@nxp.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Anson Huang 2020-09-17 13:33:46 +08:00 committed by Linus Walleij
parent 513034d8b0
commit 12d16b397c
2 changed files with 7 additions and 1 deletions
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2
drivers/gpio/Kconfig
View File

@ -397,7 +397,7 @@ config GPIO_MVEBU
select REGMAP_MMIO select REGMAP_MMIO
config GPIO_MXC config GPIO_MXC
def_bool y tristate "i.MX GPIO support"
depends on ARCH_MXC || COMPILE_TEST depends on ARCH_MXC || COMPILE_TEST
select GPIO_GENERIC select GPIO_GENERIC
select GENERIC_IRQ_CHIP select GENERIC_IRQ_CHIP

6
drivers/gpio/gpio-mxc.c
View File

@ -15,6 +15,7 @@
#include <linux/irq.h> #include <linux/irq.h>
#include <linux/irqdomain.h> #include <linux/irqdomain.h>
#include <linux/irqchip/chained_irq.h> #include <linux/irqchip/chained_irq.h>
#include <linux/module.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/syscore_ops.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], }, { .compatible = "fsl,imx7d-gpio", .data = &mxc_gpio_devtype[IMX35_GPIO], },
{ /* sentinel */ } { /* sentinel */ }
}; };
MODULE_DEVICE_TABLE(of, mxc_gpio_dt_ids);
/* /*
* MX2 has one interrupt *for all* gpio ports. The list is used * 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); return platform_driver_register(&mxc_gpio_driver);
} }
subsys_initcall(gpio_mxc_init); subsys_initcall(gpio_mxc_init);
MODULE_AUTHOR("Shawn Guo <shawn.guo@linaro.org>");
MODULE_DESCRIPTION("i.MX GPIO Driver");
MODULE_LICENSE("GPL");