Messages in this thread | | | Subject | Re: [PATCH] net: dsa: bcm_sf2: remove redundant variable off | From | Florian Fainelli <> | Date | Mon, 9 Jul 2018 09:10:00 -0700 |
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Hi Andrew,
On 07/04/2018 07:25 AM, Andrew Lunn wrote: > Hi Florian > > I this a bug? It seems to be a result of moving to > b53_disable_port() in f86ad77faf. > > Before you would handle the CPU port differently than a normal > port. After this change, there is no difference?
This is not a bug actually but it is not obvious because there was a separate definition added in bcm_sf2_regs.h for port 8 named CORE_IMP_CTL. The logic in b53_regs.h is:
#define B53_PORT_CTRL(i) (0x00 + (i))
and due to the memory map used in bcm_sf2, that would translate into:
8 << 2 = 0x20 which is correct here and matches the definition of CORE_IMP_CTL.
in fact, the new code is more correct because any port could be a DSA CPU port, whereas before we assumed that port 8 == CPU port, which is not necessarily true.
Thanks! -- Florian
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