[PATCH next v2 1/2] gpio: hisi: Add initial device tree support

[Weilong Chen <chenweilong@huawei.com>]

Add support for HiSilicon GPIO controller in embedded platform, which
boot from devicetree.

Signed-off-by: Weilong Chen <chenweilong@huawei.com>
---
Change since v1:
- Rename gpio-ascend910 to ascend910-gpio
Link: https://lore.kernel.org/lkml/30b95e7b-b902-babc-ea78-a2112c80ec7e@linaro.org/t/#m39e195979c1f42a6327aba009428316607d033e2

 drivers/gpio/Kconfig     |  2 +-
 drivers/gpio/gpio-hisi.c | 15 ++++++++++++++-
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index e034f752e7ce..71a7880af59d 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -310,7 +310,7 @@ config GPIO_GRGPIO
 
 config GPIO_HISI
 	tristate "HiSilicon GPIO controller driver"
-	depends on (ARM64 && ACPI) || COMPILE_TEST
+	depends on ARM64 || COMPILE_TEST
 	select GPIO_GENERIC
 	select GPIOLIB_IRQCHIP
 	help
diff --git a/drivers/gpio/gpio-hisi.c b/drivers/gpio/gpio-hisi.c
index 3caabef5c7a2..92cf575f2eab 100644
--- a/drivers/gpio/gpio-hisi.c
+++ b/drivers/gpio/gpio-hisi.c
@@ -1,8 +1,10 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /* Copyright (c) 2020 HiSilicon Limited. */
+#include <linux/acpi.h>
 #include <linux/gpio/driver.h>
 #include <linux/module.h>
 #include <linux/mod_devicetable.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/property.h>
 
@@ -215,11 +217,21 @@ static void hisi_gpio_init_irq(struct hisi_gpio *hisi_gpio)
 	hisi_gpio_write_reg(chip, HISI_GPIO_INTCOMB_MASK_WX, 1);
 }
 
+#ifdef CONFIG_ACPI
 static const struct acpi_device_id hisi_gpio_acpi_match[] = {
 	{"HISI0184", 0},
 	{}
 };
 MODULE_DEVICE_TABLE(acpi, hisi_gpio_acpi_match);
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id hisi_gpio_dts_match[] = {
+	{ .compatible = "hisilicon,ascend910-gpio", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, hisi_gpio_dts_match);
+#endif
 
 static void hisi_gpio_get_pdata(struct device *dev,
 				struct hisi_gpio *hisi_gpio)
@@ -310,7 +322,8 @@ static int hisi_gpio_probe(struct platform_device *pdev)
 static struct platform_driver hisi_gpio_driver = {
 	.driver		= {
 		.name	= HISI_GPIO_DRIVER_NAME,
-		.acpi_match_table = hisi_gpio_acpi_match,
+		.acpi_match_table = ACPI_PTR(hisi_gpio_acpi_match),
+		.of_match_table = of_match_ptr(hisi_gpio_dts_match),
 	},
 	.probe		= hisi_gpio_probe,
 };
-- 
2.31.GIT