Re: [PATCH v5 1/3] phy: handle optional regulator for PHY

Russell King (Oracle)
2024-01-02T11:31:09Z

On Wed, Dec 20, 2023 at 09:35:35PM +0100, Jernej Skrabec wrote:
> From: Corentin Labbe <clabbe.montjoie@gmail.com>
>
> Add handling of optional regulators for PHY.
>
> Regulators need to be enabled before PHY scanning, so MDIO bus
> initiate this task.
>
> Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
> Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
> ---
> drivers/net/mdio/fwnode_mdio.c | 53 ++++++++++++++++++++++++++++++++--
> drivers/net/phy/phy_device.c | 6 ++++
> include/linux/phy.h | 3 ++
> 3 files changed, 60 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/mdio/fwnode_mdio.c b/drivers/net/mdio/fwnode_mdio.c
> index fd02f5cbc853..bd5a27eaf40c 100644
> --- a/drivers/net/mdio/fwnode_mdio.c
> +++ b/drivers/net/mdio/fwnode_mdio.c
> @@ -11,6 +11,7 @@
> #include <linux/of.h>
> #include <linux/phy.h>
> #include <linux/pse-pd/pse.h>
> +#include <linux/regulator/consumer.h>
>
> MODULE_AUTHOR("Calvin Johnson <calvin.johnson@oss.nxp.com>");
> MODULE_LICENSE("GPL");
> @@ -58,6 +59,40 @@ fwnode_find_mii_timestamper(struct fwnode_handle *fwnode)
> return register_mii_timestamper(arg.np, arg.args[0]);
> }
>
> +static int
> +fwnode_regulator_get_bulk_enabled(struct device *dev,
> + struct fwnode_handle *fwnode,
> + struct regulator_bulk_data **consumers)

This seems to be a bad name for something living in fwnode_mdio.c - it
looks like something the regulator core should be providing.

> +clean_regulators:
> + if (reg_cnt > 0)
> + regulator_bulk_disable(reg_cnt, consumers);
> + kfree(consumers);

and there really should be a function that undoes the effects of
fwnode_regulator_get_bulk_enabled() rather than having it open-coded,
especially as:

> @@ -3400,6 +3401,11 @@ static int phy_remove(struct device *dev)
>
> phydev->drv = NULL;
>
> + if (phydev->regulator_cnt > 0)
> + regulator_bulk_disable(phydev->regulator_cnt, phydev->consumers);
> +
> + kfree(phydev->consumers);
> +

it also appears here.

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