[U-Boot] [PATCH v3 5/8] dm: pmic: add pmic_shutdown() interface

[Kever Yang]

On 2019/9/19 下午4:09, Elaine Zhang wrote:
> From: Joseph Chen <chenjh at rock-chips.com>
>
> It is a common requirement to shutdown some PMIC. Provide some
> simple convenience functions to do this.
>
> Signed-off-by: Joseph Chen <chenjh at rock-chips.com>
> Signed-off-by: Elaine Zhang <zhangqing at rock-chips.com>

Reviewed-by: Kever Yang<kever.yang at rock-chips.com>

Thanks,
- Kever
> ---
>   drivers/power/pmic/pmic-uclass.c | 11 +++++++++++
>   include/power/pmic.h             |  9 +++++++++
>   2 files changed, 20 insertions(+)
>
> diff --git a/drivers/power/pmic/pmic-uclass.c b/drivers/power/pmic/pmic-uclass.c
> index db68c766f5d7..28cfe0c987a2 100644
> --- a/drivers/power/pmic/pmic-uclass.c
> +++ b/drivers/power/pmic/pmic-uclass.c
> @@ -191,6 +191,17 @@ static int pmic_pre_probe(struct udevice *dev)
>   	return 0;
>   }
>   
> +
> +int pmic_shutdown(struct udevice *dev)
> +{
> +	const struct dm_pmic_ops *ops = dev_get_driver_ops(dev);
> +
> +	if (!ops || !ops->shutdown)
> +		return -ENOSYS;
> +
> +	return ops->shutdown(dev);
> +}
> +
>   UCLASS_DRIVER(pmic) = {
>   	.id		= UCLASS_PMIC,
>   	.name		= "pmic",
> diff --git a/include/power/pmic.h b/include/power/pmic.h
> index be9de6b4de7e..231195e5ea85 100644
> --- a/include/power/pmic.h
> +++ b/include/power/pmic.h
> @@ -164,6 +164,7 @@ struct dm_pmic_ops {
>   	int (*read)(struct udevice *dev, uint reg, uint8_t *buffer, int len);
>   	int (*write)(struct udevice *dev, uint reg, const uint8_t *buffer,
>   		     int len);
> +	int (*shutdown)(struct udevice *dev);
>   };
>   
>   /**
> @@ -306,6 +307,14 @@ struct uc_pmic_priv {
>   	uint trans_len;
>   };
>   
> +/**
> + * pmic_shutdown() - power off supplies of PMIC
> + *
> + * @dev:	PMIC device to update
> + * @return 0 on success or negative value of errno.
> + */
> +int pmic_shutdown(struct udevice *dev);
> +
>   #endif /* CONFIG_DM_PMIC */
>   
>   #ifdef CONFIG_POWER