linux-kernel - Re: [PATCH v2 2/3] usb: typec: change altmode SVID to u16 entry

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Date:   Wed, 15 Nov 2023 09:27:16 +0200
From:   Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
        Mark Gross <markgross@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH v2 2/3] usb: typec: change altmode SVID to u16 entry

On Tue, Nov 14, 2023 at 12:13:28AM +0200, Dmitry Baryshkov wrote:
> As stated in the changelog for the commit 7b458a4c5d73 ("usb: typec: Add
> typec_port_register_altmodes()"), the code should be adjusted according
> to the AltMode bindings. As the SVID is 16 bits wide (according to the
> USB PD Spec), use fwnode_property_read_u16() to read it.
> 
> Acked-by: Hans de Goede <hdegoede@...hat.com>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

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

> ---
>  drivers/platform/x86/intel/chtwc_int33fe.c | 2 +-
>  drivers/usb/typec/class.c                  | 5 +++--
>  2 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/platform/x86/intel/chtwc_int33fe.c b/drivers/platform/x86/intel/chtwc_int33fe.c
> index 848baecc1bb0..93f75ba1dafd 100644
> --- a/drivers/platform/x86/intel/chtwc_int33fe.c
> +++ b/drivers/platform/x86/intel/chtwc_int33fe.c
> @@ -136,7 +136,7 @@ static const struct software_node altmodes_node = {
>  };
>  
>  static const struct property_entry dp_altmode_properties[] = {
> -	PROPERTY_ENTRY_U32("svid", 0xff01),
> +	PROPERTY_ENTRY_U16("svid", 0xff01),
>  	PROPERTY_ENTRY_U32("vdo", 0x0c0086),
>  	{ }
>  };
> diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
> index 6ec2a94e6fad..4251d44137b6 100644
> --- a/drivers/usb/typec/class.c
> +++ b/drivers/usb/typec/class.c
> @@ -2238,7 +2238,8 @@ void typec_port_register_altmodes(struct typec_port *port,
>  	struct typec_altmode_desc desc;
>  	struct typec_altmode *alt;
>  	size_t index = 0;
> -	u32 svid, vdo;
> +	u16 svid;
> +	u32 vdo;
>  	int ret;
>  
>  	altmodes_node = device_get_named_child_node(&port->dev, "altmodes");
> @@ -2246,7 +2247,7 @@ void typec_port_register_altmodes(struct typec_port *port,
>  		return; /* No altmodes specified */
>  
>  	fwnode_for_each_child_node(altmodes_node, child) {
> -		ret = fwnode_property_read_u32(child, "svid", &svid);
> +		ret = fwnode_property_read_u16(child, "svid", &svid);
>  		if (ret) {
>  			dev_err(&port->dev, "Error reading svid for altmode %s\n",
>  				fwnode_get_name(child));
> -- 
> 2.42.0

-- 
heikki