linux-kernel - Re: [PATCH v2 4/4] net: dsa: vsc73xx: Assert reset if iCPU is enabled

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Date:   Thu, 4 Jul 2019 13:27:18 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Pawel Dembicki <paweldembicki@...il.com>
Cc:     linus.walleij@...aro.org, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 4/4] net: dsa: vsc73xx: Assert reset if iCPU is enabled



On 7/3/2019 10:19 AM, Pawel Dembicki wrote:
> Driver allow to use devices with disabled iCPU only.
> 
> Some devices have pre-initialised iCPU by bootloader.
> That state make switch unmanaged. This patch force reset
> if device is in unmanaged state. In the result chip lost
> internal firmware from RAM and it can be managed.
> 
> Signed-off-by: Pawel Dembicki <paweldembicki@...il.com>
> ---

[snip]

> @@ -1158,6 +1143,19 @@ int vsc73xx_probe(struct vsc73xx *vsc)
>  		msleep(20);
>  
>  	ret = vsc73xx_detect(vsc);
> +	if (ret == -EAGAIN) {
> +		dev_err(vsc->dev,
> +			"Chip seams to be out of control. Assert reset and try again.\n");
> +		gpiod_set_value_cansleep(vsc->reset, 1);

s/seams/seems/

With that fixed:

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian