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net: dsa: mv88e6xxx: wait for 88E6185 PPU disabled

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The PPU state of 88E6185 can be either "Disabled at Reset" or
"Disabled after Initialization". Because we intentionally clear the
PPU Enabled bit before checking its state, it is safe to wait for the
MV88E6185_G1_STS_PPU_STATE_DISABLED state explicitly instead of waiting
for any state different than MV88E6185_G1_STS_PPU_STATE_POLLING.

Signed-off-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2019-08-09 18:47:53 -04:00 committed by David S. Miller
parent eb2e7f0922
commit 929938536f
1 changed files with 1 additions and 1 deletions
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drivers/net/dsa/mv88e6xxx/global1.c
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@ -46,7 +46,7 @@ static int mv88e6185_g1_wait_ppu_disabled(struct mv88e6xxx_chip *chip)
/* Check the value of the PPUState bits 15:14 */
state &= MV88E6185_G1_STS_PPU_STATE_MASK;
if (state != MV88E6185_G1_STS_PPU_STATE_POLLING)
if (state == MV88E6185_G1_STS_PPU_STATE_DISABLED)
return 0;
usleep_range(1000, 2000);