[PATCH] gpio: mpc8xxx: Add ACPI support

[Ran Wang <ran.wang_1@xxxxxxx>]

Current implementation only supports DT, now add ACPI support.

Note that compared to device of 'fsl,qoriq-gpio', LS1028A and
LS1088A's GPIO have no extra programming, so simplify related checking.

Signed-off-by: Ran Wang <ran.wang_1@xxxxxxx>
---
 drivers/gpio/gpio-mpc8xxx.c | 50 +++++++++++++++++++++++++++----------
 1 file changed, 37 insertions(+), 13 deletions(-)

diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index 6dfca83bcd90..de5b7e17cde3 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -9,6 +9,7 @@
  * kind, whether express or implied.
  */
 
+#include <linux/acpi.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/spinlock.h>
@@ -292,8 +293,6 @@ static const struct of_device_id mpc8xxx_gpio_ids[] = {
 	{ .compatible = "fsl,mpc5121-gpio", .data = &mpc512x_gpio_devtype, },
 	{ .compatible = "fsl,mpc5125-gpio", .data = &mpc5125_gpio_devtype, },
 	{ .compatible = "fsl,pq3-gpio",     },
-	{ .compatible = "fsl,ls1028a-gpio", },
-	{ .compatible = "fsl,ls1088a-gpio", },
 	{ .compatible = "fsl,qoriq-gpio",   },
 	{}
 };
@@ -303,10 +302,19 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 	struct device_node *np = pdev->dev.of_node;
 	struct mpc8xxx_gpio_chip *mpc8xxx_gc;
 	struct gpio_chip	*gc;
-	const struct mpc8xxx_gpio_devtype *devtype =
-		of_device_get_match_data(&pdev->dev);
+	const struct mpc8xxx_gpio_devtype *devtype;
+	const struct acpi_device_id *acpi_id;
 	int ret;
 
+	if (pdev->dev.of_node) {
+		devtype = of_device_get_match_data(&pdev->dev);
+	} else {
+		acpi_id = acpi_match_device(pdev->dev.driver->acpi_match_table,
+						&pdev->dev);
+		if (acpi_id)
+			devtype = (struct mpc8xxx_gpio_devtype *) acpi_id->driver_data;
+	}
+
 	mpc8xxx_gc = devm_kzalloc(&pdev->dev, sizeof(*mpc8xxx_gc), GFP_KERNEL);
 	if (!mpc8xxx_gc)
 		return -ENOMEM;
@@ -315,14 +323,14 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 
 	raw_spin_lock_init(&mpc8xxx_gc->lock);
 
-	mpc8xxx_gc->regs = of_iomap(np, 0);
+	mpc8xxx_gc->regs = devm_platform_ioremap_resource(pdev, 0);
 	if (!mpc8xxx_gc->regs)
 		return -ENOMEM;
 
 	gc = &mpc8xxx_gc->gc;
 	gc->parent = &pdev->dev;
 
-	if (of_property_read_bool(np, "little-endian")) {
+	if (device_property_read_bool(&pdev->dev, "little-endian")) {
 		ret = bgpio_init(gc, &pdev->dev, 4,
 				 mpc8xxx_gc->regs + GPIO_DAT,
 				 NULL, NULL,
@@ -369,10 +377,14 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 	 * associated input enable must be set (GPIOxGPIE[IEn]=1) to propagate
 	 * the port value to the GPIO Data Register.
 	 */
-	if (of_device_is_compatible(np, "fsl,qoriq-gpio") ||
-	    of_device_is_compatible(np, "fsl,ls1028a-gpio") ||
-	    of_device_is_compatible(np, "fsl,ls1088a-gpio"))
-		gc->write_reg(mpc8xxx_gc->regs + GPIO_IBE, 0xffffffff);
+	if (pdev->dev.of_node) {
+		if (of_device_is_compatible(np, "fsl,qoriq-gpio"))
+			gc->write_reg(mpc8xxx_gc->regs + GPIO_IBE, 0xffffffff);
+	} else {
+		if (acpi_match_device(pdev->dev.driver->acpi_match_table,
+					&pdev->dev))
+			gc->write_reg(mpc8xxx_gc->regs + GPIO_IBE, 0xffffffff);
+	}
 
 	ret = gpiochip_add_data(gc, mpc8xxx_gc);
 	if (ret) {
@@ -381,12 +393,15 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 		goto err;
 	}
 
-	mpc8xxx_gc->irqn = irq_of_parse_and_map(np, 0);
+	mpc8xxx_gc->irqn = platform_get_irq(pdev, 0);
 	if (!mpc8xxx_gc->irqn)
 		return 0;
 
-	mpc8xxx_gc->irq = irq_domain_add_linear(np, MPC8XXX_GPIO_PINS,
-					&mpc8xxx_gpio_irq_ops, mpc8xxx_gc);
+	mpc8xxx_gc->irq = irq_domain_create_linear(dev_fwnode(&pdev->dev),
+						   MPC8XXX_GPIO_PINS,
+						   &mpc8xxx_gpio_irq_ops,
+						   mpc8xxx_gc);
+
 	if (!mpc8xxx_gc->irq)
 		return 0;
 
@@ -425,12 +440,21 @@ static int mpc8xxx_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id gpio_acpi_ids[] = {
+	{"NXP0031",},
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, gpio_acpi_ids);
+#endif
+
 static struct platform_driver mpc8xxx_plat_driver = {
 	.probe		= mpc8xxx_probe,
 	.remove		= mpc8xxx_remove,
 	.driver		= {
 		.name = "gpio-mpc8xxx",
 		.of_match_table	= mpc8xxx_gpio_ids,
+		.acpi_match_table = ACPI_PTR(gpio_acpi_ids),
 	},
 };
 
-- 
2.25.1