ath9k_hw: Implement PLL control on AR9003

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 27 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.c b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
index f1632abdce50..9767265cde02 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
@@ -112,8 +112,27 @@ static void ar9003_hw_spur_mitigate(struct ath_hw *ah,
 static u32 ar9003_hw_compute_pll_control(struct ath_hw *ah,
                                          struct ath9k_channel *chan)
 {
-        /* TODO */
-        return 0;
+        u32 pll;
+
+        pll = SM(0x5, AR_RTC_9300_PLL_REFDIV);
+
+        if (chan && IS_CHAN_HALF_RATE(chan))
+                pll |= SM(0x1, AR_RTC_9300_PLL_CLKSEL);
+        else if (chan && IS_CHAN_QUARTER_RATE(chan))
+                pll |= SM(0x2, AR_RTC_9300_PLL_CLKSEL);
+
+        if (chan && IS_CHAN_5GHZ(chan)) {
+                pll |= SM(0x28, AR_RTC_9300_PLL_DIV);
+
+                /*
+                 * When doing fast clock, set PLL to 0x142c
+                 */
+                if (IS_CHAN_A_5MHZ_SPACED(chan))
+                        pll = 0x142c;
+        } else
+                pll |= SM(0x2c, AR_RTC_9300_PLL_DIV);
+
+        return pll;
 }
 
 static void ar9003_hw_set_channel_regs(struct ath_hw *ah,
diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h
index bc48bc92076f..9d632861aaff 100644
--- a/drivers/net/wireless/ath/ath9k/reg.h
+++ b/drivers/net/wireless/ath/ath9k/reg.h
@@ -1040,6 +1040,12 @@ enum {
 #define AR_PCIE_MSI                              (AR_SREV_9300_20_OR_LATER(ah) ? 0x40a4 : 0x4094)
 #define AR_PCIE_MSI_ENABLE                       0x00000001
 
+#define AR_RTC_9300_PLL_DIV          0x000003ff
+#define AR_RTC_9300_PLL_DIV_S        0
+#define AR_RTC_9300_PLL_REFDIV       0x00003C00
+#define AR_RTC_9300_PLL_REFDIV_S     10
+#define AR_RTC_9300_PLL_CLKSEL       0x0000C000
+#define AR_RTC_9300_PLL_CLKSEL_S     14
 
 #define AR_RTC_9160_PLL_DIV     0x000003ff
 #define AR_RTC_9160_PLL_DIV_S   0