linux-kernel - Re: [PATCH 10/11] [DEBUG] firmware: arm_scmi: add custom

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Message-ID: <c0a300b7-7589-bfb1-6731-f07fdd7391fd@linaro.org>
Date:   Tue, 20 Oct 2020 22:49:23 -0400
From:   Thara Gopinath <thara.gopinath@...aro.org>
To:     Cristian Marussi <cristian.marussi@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     sudeep.holla@....com, lukasz.luba@....com,
        james.quinlan@...adcom.com, Jonathan.Cameron@...wei.com,
        f.fainelli@...il.com, etienne.carriere@...aro.org,
        vincent.guittot@...aro.org, souvik.chakravarty@....com
Subject: Re: [PATCH 10/11] [DEBUG] firmware: arm_scmi: add custom_dummy SCMI
 devname



On 10/14/20 11:05 AM, Cristian Marussi wrote:
> Add custom_dummy SCMI devname.
> 
> Signed-off-by: Cristian Marussi <cristian.marussi@....com>
> ---
>   drivers/firmware/arm_scmi/driver.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c
> index 55df134c2338..5c39a738866a 100644
> --- a/drivers/firmware/arm_scmi/driver.c
> +++ b/drivers/firmware/arm_scmi/driver.c
> @@ -993,6 +993,7 @@ static struct scmi_prot_devnames devnames[] = {
>   	{ SCMI_PROTOCOL_CLOCK,  { "clocks" },},
>   	{ SCMI_PROTOCOL_SENSOR, { "hwmon" },},
>   	{ SCMI_PROTOCOL_RESET,  { "reset" },},
> +	{ SCMI_PROTOCOL_CUSTOM_DUMMY,  { "custom_dummy" },},

Hi Cristian,

Thanks for the sample dummy custom protocol and driver!
The problem with adding scmi devname into the array is that every time a 
custom vendor protocol is added, the array has to be extended. Instead 
since the scmi spec supports the range 0x80-0xff for custom protocols, 
why not check for that range in scmi_create_protocol_devices and go 
ahead with registering the creating the protocol device via 
scmi_create_protocol_device?


>   };
>   
>   static inline void
> 

-- 
Warm Regards
Thara