Re: [PATCH next v4 1/2] i2c: hisi: Add initial device tree support

Yicong Yang
2022-09-13T07:48:30Z

On 2022/9/9 15:48, Weilong Chen wrote:
> The HiSilicon I2C controller can be used on embedded platform, which
> boot from devicetree.
>
> Signed-off-by: Weilong Chen <chenweilong@huawei.com>
> ---
> drivers/i2c/busses/Kconfig | 2 +-
> drivers/i2c/busses/i2c-hisi.c | 19 ++++++++++++++++++-
> 2 files changed, 19 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
> index 7284206b278b..6d0fdf48e97d 100644
> --- a/drivers/i2c/busses/Kconfig
> +++ b/drivers/i2c/busses/Kconfig
> @@ -673,7 +673,7 @@ config I2C_HIGHLANDER
>
> config I2C_HISI
> tristate "HiSilicon I2C controller"
> - depends on (ARM64 && ACPI) || COMPILE_TEST
> + depends on ARM64 || COMPILE_TEST
> help
> Say Y here if you want to have Hisilicon I2C controller support
> available on the Kunpeng Server.
> diff --git a/drivers/i2c/busses/i2c-hisi.c b/drivers/i2c/busses/i2c-hisi.c
> index 76c3d8f6fc3c..7a77f306d05f 100644
> --- a/drivers/i2c/busses/i2c-hisi.c
> +++ b/drivers/i2c/busses/i2c-hisi.c
> @@ -5,6 +5,9 @@
> * Copyright (c) 2021 HiSilicon Technologies Co., Ltd.
> */
>
> +#ifdef CONFIG_ACPI
> +#include <linux/acpi.h>
> +#endif
> #include <linux/bits.h>
> #include <linux/bitfield.h>
> #include <linux/completion.h>
> @@ -13,6 +16,9 @@
> #include <linux/io.h>
> #include <linux/module.h>
> #include <linux/mod_devicetable.h>
> +#ifdef CONFIG_OF
> +#include <linux/of.h>
> +#endif

I don't think the protection for the headers is necessary and common. The
ACPI/OF specific functions should have already been handled well with{out}
ACPI/OF config. Have you met some problems without these?

BTW, it's better to have a changelog when updating the patches.

> #include <linux/platform_device.h>
> #include <linux/property.h>
> #include <linux/units.h>
> @@ -483,17 +489,28 @@ static int hisi_i2c_probe(struct platform_device *pdev)
> return 0;
> }
>
> +#ifdef CONFIG_ACPI
> static const struct acpi_device_id hisi_i2c_acpi_ids[] = {
> { "HISI03D1", 0 },
> { }
> };
> MODULE_DEVICE_TABLE(acpi, hisi_i2c_acpi_ids);
> +#endif
> +
> +#ifdef CONFIG_OF
> +static const struct of_device_id hisi_i2c_dts_ids[] = {
> + { .compatible = "hisilicon,hisi-i2c", },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, hisi_i2c_dts_ids);
> +#endif
>
> static struct platform_driver hisi_i2c_driver = {
> .probe = hisi_i2c_probe,
> .driver = {
> .name = "hisi-i2c",
> - .acpi_match_table = hisi_i2c_acpi_ids,
> + .acpi_match_table = ACPI_PTR(hisi_i2c_acpi_ids),
> + .of_match_table = of_match_ptr(hisi_i2c_dts_ids),
> },
> };
> module_platform_driver(hisi_i2c_driver);
>