linux-kernel - Re: [PATCH] net: usb: smsc95xx: configure external LEDs function for EVB-LAN8670-USB

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Message-ID: <9c19e0a1-b65c-416a-833c-1a4c3b63fa2f@lunn.ch>
Date: Wed, 22 May 2024 18:44:22 +0200
From: Andrew Lunn <andrew@...n.ch>
To: Parthiban Veerasooran <Parthiban.Veerasooran@...rochip.com>
Cc: steve.glendinning@...well.net, UNGLinuxDriver@...rochip.com,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: usb: smsc95xx: configure external LEDs function for
 EVB-LAN8670-USB

On Wed, May 22, 2024 at 07:38:17PM +0530, Parthiban Veerasooran wrote:
> By default, LAN9500A configures the external LEDs to the below function.
> nSPD_LED -> Speed Indicator
> nLNKA_LED -> Link and Activity Indicator
> nFDX_LED -> Full Duplex Link Indicator
> 
> But, EVB-LAN8670-USB uses the below external LEDs function which can be
> enabled by writing 1 to the LED Select (LED_SEL) bit in the LAN9500A.
> nSPD_LED -> Speed Indicator
> nLNKA_LED -> Link Indicator
> nFDX_LED -> Activity Indicator

What else can the LEDs indicate?

> +	/* Set LED Select (LED_SEL) bit for the external LED pins functionality
> +	 * in the Microchip's EVB-LAN8670-USB 10BASE-T1S Ethernet device which

Is this a function of the USB dongle? Or a function of the PHY?

	Andrew