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[PATCH v8 0/3] gpio: dwapb: add gpio-signaled acpi event support for power button

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  [PATCH v8 0/3] gpio: dwapb: add gpio-signaled acpi event support for power button Jiang Qiu <qiujiang@huawei.com> - 2016-04-20 05:30 +0200
    [PATCH v8 3/3] gpio: dwapb: add gpio-signaled acpi event support Jiang Qiu <qiujiang@huawei.com> - 2016-04-20 05:30 +0200

#1383027 — [PATCH v8 0/3] gpio: dwapb: add gpio-signaled acpi event support for power button

This patchset adds gpio-signaled acpi events support for power button on hisilicon
D02 board.

The three patches respectively:
        - remove name from dwapb_port_property
	- convert device node to fwnode
        - add gpio-signaled acpi event support

   This patchset is based on
   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git
   branch "devel"

Changes v7 -> v8:
   - fixed few minors

Changes v6 -> v7:
   - add patch1 by Alan's suggestion

Changes v5 -> v6:
   - merge patch 2~3 to one patch
   - small fixed from Alan's suggestion
   - fixed subject title reference commit history

Changes v4 -> v5:
   - split into three patchs
   - add Andy's ACKs
   
Changes v3 -> v4:
   - re-organize this two patchs by Andy's suggestion

Changes v2 -> v3:
   - fixed the build error reported by Kbuild test robot

Changes v1 -> v2: 
   - rebase to branch "devel" of Linus Walleij's repository
   - split in two patch as suggested by Andy S
   - add Mika's ACKs

Jiang Qiu (3):
  gpio: dwapb: remove name from dwapb_port_property
  gpio: dwapb: convert device node to fwnode
  gpio: dwapb: add gpio-signaled acpi event support

 drivers/gpio/gpio-dwapb.c                | 78 +++++++++++++++++++-------------
 drivers/mfd/intel_quark_i2c_gpio.c       |  3 +-
 include/linux/platform_data/gpio-dwapb.h |  3 +-
 3 files changed, 48 insertions(+), 36 deletions(-)

-- 
1.9.1

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#1383029 — [PATCH v8 3/3] 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>
---
 drivers/gpio/gpio-dwapb.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index 7258cc5..b2b83d6 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -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
@@ -436,6 +439,10 @@ 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;
 }
 
@@ -503,6 +510,9 @@ 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;
 	}
@@ -577,6 +587,12 @@ 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)
 {
@@ -671,6 +687,7 @@ 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,
-- 
1.9.1

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