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net: sfp: ignore power level 2 prior to SFF-8472 Rev 10.2 

Power level 2 was introduced by SFF-8472 revision 10.2. Ignore
the power declaration bit for modules that are not compliant with
at least this revision.

This should remove any spurious indication of 1.5W modules.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Russell King (Oracle) 2022-10-21 16:09:49 +01:00 committed by Jakub Kicinski
parent 02eaf5a791
commit 18cc659e95
1 changed files with 2 additions and 1 deletions
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3
drivers/net/phy/sfp.c
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@ -1761,7 +1761,8 @@ static int sfp_module_parse_power(struct sfp *sfp)
u32 power_mW = 1000;
bool supports_a2;
if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL))
if (sfp->id.ext.sff8472_compliance >= SFP_SFF8472_COMPLIANCE_REV10_2 &&
sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL))
power_mW = 1500;
if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL))
power_mW = 2000;