Thread (28 messages) 28 messages, 7 authors, 2024-03-13

Re: [PATCH] net: dsa: mt7530: disable LEDs before reset

flat view

From: Andrew Lunn <andrew@lunn.ch>
Date: 2024-03-12 01:03:15
Also in: linux-arm-kernel, linux-mediatek, lkml

(b) When a cable attached to an active peer is connected to
Port 3 (lan4) before reset, the incorrect crystal frequency
selection (0b11 = 25MHz) always occurs:

              [7]      [8]     [10]    [12]
              :        :       :       :
              _________         ______________________________________
ESW_P4_LED_0           |_______|
              _________         _______
ESW_P3_LED_0           |_______|       |______________________________

                        :     : :     :
                        [9]...: [11]..:

 [7] Port 4 LED Off. Port 3 LED Off.
 [8] Signals inverted. (reset_control_assert; reset_control_deassert)
 [9] Period of 320 usec.
[10] Signals inverted.
[11] Period of 300 usec.
[12] Signals reflect the bootstrapped configuration.
Shame the patch has already been accepted. The text in this email
would of made a cool commit message.

      Andrew
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