[PATCH] ath9k_hw: Fix fast clock support for AR9280 v2.0+

[PATCH] ath9k_hw: Fix fast clock support for AR9280 v2.0+

[Rajkumar Manoharan]

To enable fast clock support on 5GHz for AR9280 v2.0+ chips,
mac version alone is not sufficient. It also depends on eeprom
values.

Cc: stable@kernel.org
Cc: Adrian Chadd <adrian@freebsd.org>
Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
---
 drivers/net/wireless/ath/ath9k/hw.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index 284d2a4..d8d776f9 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -2184,7 +2184,10 @@ int ath9k_hw_fill_cap_info(struct ath_hw *ah)
 			pCap->hw_caps |= ATH9K_HW_CAP_PAPRD;
 	} else {
 		pCap->tx_desc_len = sizeof(struct ath_desc);
-		if (AR_SREV_9280_20(ah))
+		if (AR_SREV_9280_20(ah) &&
+		    ((ah->eep_ops->get_eeprom(ah, EEP_MINOR_REV) <=
+					      AR5416_EEP_MINOR_VER_16) ||
+		     ah->eep_ops->get_eeprom(ah, EEP_FSTCLK_5G)))
 			pCap->hw_caps |= ATH9K_HW_CAP_FASTCLOCK;
 	}
 
-- 
1.7.6.1

Re: [PATCH] ath9k_hw: Fix fast clock support for AR9280 v2.0+

[Felix Fietkau]

On 2011-08-30 12:25 PM, Rajkumar Manoharan wrote:
> To enable fast clock support on 5GHz for AR9280 v2.0+ chips,
> mac version alone is not sufficient. It also depends on eeprom
> values.
No, it doesn't. The check is bogus, even though it's present in the 
internal atheros codebase. All AR9280 can do fastclock even though on 
some the EEPROM flag is disabled.

- Felix