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authorMartin Blumenstingl <martin.blumenstingl@googlemail.com>2016-12-04 08:26:55 +0100
committerMathias Kresin <dev@kresin.me>2016-12-08 19:36:22 +0100
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lantiq: fix ath9k EEPROM data swapping for some devices
The EEPROM data in the flash of the ARV7518PW, ARV8539PW22, BTHOMEHUBV2B and BTHOMEHUBV3A is stored byte-swapped (swab16), meaning that for example the ath9k base_eep_header fields "version" (high and low byte), "opCapFlags" and "eepMisc" are swapped (the latter ones are just 1 byte wide, thus their position is swapped). The old "ath,eep-endian" property enabled the corresponding swapping logic in the ath9k driver (swab16 in ath9k_hw_nvram_swap_data, which is based on the magic bytes in the EEPROM data which have nothing to do with the calibration data - thus this logic should not be used anymore). Since we have switched to the upstream ath9k devicetree bindings there is no binding anymore which enables swab16 in ath9k (as this logic is not recommended anymore as explained above), leading to ath9k initialization errors: ath: phy0: Bad EEPROM VER 0x0001 or REV 0x00e0 (this shows that the version field is swapped, expected values are VER 0x000E and REV 0x0001) Swapping the ath9k calibration data when extracting it from the flash fixes the devices listed above (all other devices do not require additional swapping, since the position of the fields is already as expected by ath9k). This allows ath9k to read the version correctly again, as well as the more important "eepmisc" field (which is used for determining whether the data inside the EEPROM is Big or Little Endian which is required to parse the EEPROM contents correctly). Fixes: a20616863d3 ("lantiq: use ath9k device tree bindings binding/owl-loader") Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
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