diff options
| author | Vivek Natarajan <vnatarajan@atheros.com> | 2011-01-27 12:15:07 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-01-28 23:44:28 +0300 |
| commit | b141581923ab4904052174e3b4eb17cc3ce8632c (patch) | |
| tree | 7b6249510e86a8e72cc10c73ab8e6eeecb631917 /drivers/net/wireless/ath/ath9k/hw.c | |
| parent | 74f7635930bb157b2e83d38a68177a2b28138ead (diff) | |
| download | linux-b141581923ab4904052174e3b4eb17cc3ce8632c.tar.xz | |
ath9k_hw: Add a function to read sqsum_dvc.
Add a function to observe the delta VC of BB_PLL.
For a good chip, the sqsum_dvc is below 2000.
Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/hw.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hw.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 48d121c24eb7..0e64d7666057 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -668,6 +668,19 @@ static void ath9k_hw_init_qos(struct ath_hw *ah) REGWRITE_BUFFER_FLUSH(ah); } +unsigned long ar9003_get_pll_sqsum_dvc(struct ath_hw *ah) +{ + REG_WRITE(ah, PLL3, (REG_READ(ah, PLL3) & ~(PLL3_DO_MEAS_MASK))); + udelay(100); + REG_WRITE(ah, PLL3, (REG_READ(ah, PLL3) | PLL3_DO_MEAS_MASK)); + + while ((REG_READ(ah, PLL4) & PLL4_MEAS_DONE) == 0) + udelay(100); + + return (REG_READ(ah, PLL3) & SQSUM_DVC_MASK) >> 3; +} +EXPORT_SYMBOL(ar9003_get_pll_sqsum_dvc); + static void ath9k_hw_init_pll(struct ath_hw *ah, struct ath9k_channel *chan) { |