linux-kernel - Re: [PATCH v3 3/3] usb: typec: tcpm: Get Sink VDO from fwnode

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Date:   Tue, 2 Feb 2021 10:22:48 +0200
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Kyle Tso <kyletso@...gle.com>
Cc:     linux@...ck-us.net, gregkh@...uxfoundation.org,
        hdegoede@...hat.com, robh+dt@...nel.org, badhri@...gle.com,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v3 3/3] usb: typec: tcpm: Get Sink VDO from fwnode

On Mon, Feb 01, 2021 at 09:34:21PM +0800, Kyle Tso wrote:
> Commit a079973f462a ("usb: typec: tcpm: Remove tcpc_config
> configuration mechanism") removed the tcpc_config which includes the
> Sink VDO and it is not yet added back with fwnode. Add it now.
> 
> Signed-off-by: Kyle Tso <kyletso@...gle.com>

Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>

> ---
> Changes since v2:
> - use fwnode_property_count_u32 instead to get the count
> - revise the error handling
> 
>  drivers/usb/typec/tcpm/tcpm.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
> index 979b7ee6473c..9b13e19118f0 100644
> --- a/drivers/usb/typec/tcpm/tcpm.c
> +++ b/drivers/usb/typec/tcpm/tcpm.c
> @@ -5677,6 +5677,20 @@ static int tcpm_fw_get_caps(struct tcpm_port *port,
>  			port->new_source_frs_current = frs_current;
>  	}
>  
> +	/* sink-vdos is optional */
> +	ret = fwnode_property_count_u32(fwnode, "sink-vdos");
> +	if (ret < 0)
> +		ret = 0;
> +
> +	port->nr_snk_vdo = min(ret, VDO_MAX_OBJECTS);
> +	if (port->nr_snk_vdo) {
> +		ret = fwnode_property_read_u32_array(fwnode, "sink-vdos",
> +						     port->snk_vdo,
> +						     port->nr_snk_vdo);
> +		if (ret < 0)
> +			return ret;
> +	}
> +
>  	return 0;
>  }
>  
> -- 
> 2.30.0.365.g02bc693789-goog

thanks,

-- 
heikki