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gpio: dwapb: add gpio-signaled acpi event support 

This patch adds gpio-signaled acpi event support. It is used for
power button on hisilicon D02 board, an arm64 platform.

The corresponding DSDT file is defined as follows:
Device(GPI0) {
	Name(_HID, "HISI0181")
	Name(_ADR, 0)
	Name(_UID, 0)

	Name (_CRS, ResourceTemplate ()  {
		Memory32Fixed (ReadWrite, 0x802e0000, 0x10000)
		Interrupt (ResourceConsumer, Level, ActiveHigh,
		Exclusive,,,)  {344}
	})

	Device(PRTa) {
		Name (_DSD, Package () {
		Package () {
			Package () {"reg",0},
			Package () {"snps,nr-gpios",32},
		}
		})
	}

	Name (_AEI, ResourceTemplate () {
		GpioInt(Edge, ActiveLow, ExclusiveAndWake,
		PullUp, , " \\_SB.GPI0") {8}
	})

	Method (_E08, 0x0, NotSerialized) {
		Notify (\_SB.PWRB, 0x80)
	}
}

Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jiang Qiu <qiujiang@huawei.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
hifive-unleashed-5.1
Jiang Qiu 2016-04-28 17:32:03 +08:00 committed by Linus Walleij
parent 4ba8cfa79f
commit e6cb3486f5
1 changed files with 17 additions and 0 deletions
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17
drivers/gpio/gpio-dwapb.c
View File

@ -7,6 +7,7 @@
*
* All enquiries to support@picochip.com
*/
#include <linux/acpi.h>
#include <linux/gpio/driver.h>
/* FIXME: for gpio_get_value(), replace this with direct register read */
#include <linux/gpio.h>
@ -27,6 +28,8 @@
#include <linux/platform_data/gpio-dwapb.h>
#include <linux/slab.h>
#include "gpiolib.h"
#define GPIO_SWPORTA_DR 0x00
#define GPIO_SWPORTA_DDR 0x04
#define GPIO_SWPORTB_DR 0x0c
@ -435,6 +438,10 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
else
port->is_registered = true;
/* Add GPIO-signaled ACPI event support */
if (pp->irq)
acpi_gpiochip_request_interrupts(&port->gc);
return err;
}
@ -502,6 +509,9 @@ dwapb_gpio_get_pdata(struct device *dev)
dev_warn(dev, "no irq for port%d\n", pp->idx);
}
if (has_acpi_companion(dev) && pp->idx == 0)
pp->irq = platform_get_irq(to_platform_device(dev), 0);
pp->irq_shared = false;
pp->gpio_base = -1;
}
@ -576,6 +586,12 @@ static const struct of_device_id dwapb_of_match[] = {
};
MODULE_DEVICE_TABLE(of, dwapb_of_match);
static const struct acpi_device_id dwapb_acpi_match[] = {
{"HISI0181", 0},
{ }
};
MODULE_DEVICE_TABLE(acpi, dwapb_acpi_match);
#ifdef CONFIG_PM_SLEEP
static int dwapb_gpio_suspend(struct device *dev)
{
@ -670,6 +686,7 @@ static struct platform_driver dwapb_gpio_driver = {
.name = "gpio-dwapb",
.pm = &dwapb_gpio_pm_ops,
.of_match_table = of_match_ptr(dwapb_of_match),
.acpi_match_table = ACPI_PTR(dwapb_acpi_match),
},
.probe = dwapb_gpio_probe,
.remove = dwapb_gpio_remove,