Re: [PATCH 09/18] staging: typec: fusb302: Use tcpm_set_current_limit_psy

From: Guenter Roeck <linux@roeck-us.net>
To: Hans de Goede <hdegoede@redhat.com>,
	Darren Hart <dvhart@infradead.org>,
	Andy Shevchenko <andy@infradead.org>,
	Wolfram Sang <wsa@the-dreams.de>,
	Sebastian Reichel <sre@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: platform-driver-x86@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org,
	Liam Breck <liam@networkimprov.net>,
	Tony Lindgren <tony@atomide.com>,
	linux-pm@vger.kernel.org, devel@driverdev.osuosl.org
Subject: Re: [PATCH 09/18] staging: typec: fusb302: Use tcpm_set_current_limit_psy
Date: Sun, 6 Aug 2017 07:24:31 -0700	[thread overview]
Message-ID: <b2f7c028-73c9-ba74-850b-cda44905a327@roeck-us.net> (raw)
In-Reply-To: <20170806123555.5124-10-hdegoede@redhat.com>

On 08/06/2017 05:35 AM, Hans de Goede wrote:
> Register a power_supply and use tcpm_set_current_limit_psy as
> set_current_limit so that another driver (e.g. the charger driver) can
> pick the limit up and configure the system accordingly.
> 
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> ---
>   drivers/staging/typec/fusb302/fusb302.c | 18 ++++++------------
>   1 file changed, 6 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/staging/typec/fusb302/fusb302.c b/drivers/staging/typec/fusb302/fusb302.c
> index 1d8c9b66df2f..e1e08f57af99 100644
> --- a/drivers/staging/typec/fusb302/fusb302.c
> +++ b/drivers/staging/typec/fusb302/fusb302.c
> @@ -854,17 +854,6 @@ static int tcpm_set_vbus(struct tcpc_dev *dev, bool on, bool charge)
>   	return ret;
>   }
>   
> -static int tcpm_set_current_limit(struct tcpc_dev *dev, u32 max_ma, u32 mv)
> -{
> -	struct fusb302_chip *chip = container_of(dev, struct fusb302_chip,
> -						 tcpc_dev);
> -
> -	fusb302_log(chip, "current limit: %d ma, %d mv (not implemented)",
> -		    max_ma, mv);
> -
> -	return 0;
> -}
> -

Same comment as before. I think the fusb code should do what tcpm_set_current_limit_psy
is doing, ie register with a power supply.

>   static int fusb302_pd_tx_flush(struct fusb302_chip *chip)
>   {
>   	return fusb302_i2c_set_bits(chip, FUSB_REG_CONTROL0,
> @@ -1208,7 +1197,7 @@ static void init_tcpc_dev(struct tcpc_dev *fusb302_tcpc_dev)
>   	fusb302_tcpc_dev->set_polarity = tcpm_set_polarity;
>   	fusb302_tcpc_dev->set_vconn = tcpm_set_vconn;
>   	fusb302_tcpc_dev->set_vbus = tcpm_set_vbus;
> -	fusb302_tcpc_dev->set_current_limit = tcpm_set_current_limit;
> +	fusb302_tcpc_dev->set_current_limit = tcpm_set_current_limit_psy;
>   	fusb302_tcpc_dev->set_pd_rx = tcpm_set_pd_rx;
>   	fusb302_tcpc_dev->set_roles = tcpm_set_roles;
>   	fusb302_tcpc_dev->start_drp_toggling = tcpm_start_drp_toggling;
> @@ -1733,6 +1722,11 @@ static int fusb302_probe(struct i2c_client *client,
>   			return -EPROBE_DEFER;
>   	}
>   
> +	ret = tcpm_register_psy(chip->dev, &chip->tcpc_dev,
> +				"fusb302-typec-source");
> +	if (ret < 0)
> +		return ret;
> +
>   	ret = fusb302_debugfs_init(chip);
>   	if (ret < 0)
>   		return ret;
> 