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

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(-)

Hi Weilong,

On 2022/10/28 10:24, Weilong Chen wrote:
> 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),

Andy has some comments about using of ACPI_PTR/of_match_ptr(), I think they also
apply here. [*]

The patch itself looks good to me.

[*] https://lore.kernel.org/linux-i2c/d96beadb-5693-6c73-8fee-3ac3b4cb9a44@huawei.com/T/#m51adf2c1480a14ca0882784826f3168ddb83bf62

>  	},
>  	.probe		= hisi_gpio_probe,
>  };
>