[PATCH 5/7] ath9k: of: Use the clk API to get the reference clock rate

[Alban]

If a clock named "ref" exists use it to get the reference clock rate.

Signed-off-by: Alban <al...@free.fr>
---
 drivers/net/wireless/ath/ath9k/init.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/wireless/ath/ath9k/init.c 
b/drivers/net/wireless/ath/ath9k/init.c
index 36b51a5..5cb9c61 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -24,6 +24,7 @@
 #include <linux/of_net.h>
 #include <linux/nvmem-consumer.h>
 #include <linux/relay.h>
+#include <linux/clk.h>
 #include <net/ieee80211_radiotap.h>
 
 #include "ath9k.h"
@@ -564,6 +565,7 @@ static int ath9k_of_init(struct ath_softc *sc)
        struct ath_hw *ah = sc->sc_ah;
        struct ath_common *common = ath9k_hw_common(ah);
        enum ath_bus_type bus_type = common->bus_ops->ath_bus_type;
+       struct clk *clk;
        const char *mac;
        char eeprom_name[100];
        int ret;
@@ -573,6 +575,12 @@ static int ath9k_of_init(struct ath_softc *sc)
 
        ath_dbg(common, CONFIG, "parsing configuration from OF node\n");
 
+       clk = clk_get(sc->dev, "ref");
+       if (!IS_ERR(clk)) {
+               ah->is_clk_25mhz = (clk_get_rate(clk) == 25000000);
+               clk_put(clk);
+       }
+
        if (of_property_read_bool(np, "qca,no-eeprom")) {
                /* ath9k-eeprom-<bus>-<id>.bin */
                scnprintf(eeprom_name, sizeof(eeprom_name),
-- 
2.7.4