OpenWrt – Rev 4

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--- a/drivers/net/wireless/ath/ath9k/debug.c
+++ b/drivers/net/wireless/ath/ath9k/debug.c
@@ -1374,6 +1374,53 @@ void ath9k_deinit_debug(struct ath_softc
        ath9k_cmn_spectral_deinit_debug(&sc->spec_priv);
 }
 
+static ssize_t read_file_eeprom(struct file *file, char __user *user_buf,
+                            size_t count, loff_t *ppos)
+{
+       struct ath_softc *sc = file->private_data;
+       struct ath_hw *ah = sc->sc_ah;
+       struct ath_common *common = ath9k_hw_common(ah);
+       int bytes = 0;
+       int pos = *ppos;
+       int size = 4096;
+       u16 val;
+       int i;
+
+       if (AR_SREV_9300_20_OR_LATER(ah))
+               size = 16384;
+
+       if (*ppos < 0)
+               return -EINVAL;
+
+       if (count > size - *ppos)
+               count = size - *ppos;
+
+       for (i = *ppos / 2; count > 0; count -= bytes, *ppos += bytes, i++) {
+               void *from = &val;
+
+               if (!common->bus_ops->eeprom_read(common, i, &val))
+                       val = 0xffff;
+
+               if (*ppos % 2) {
+                       from++;
+                       bytes = 1;
+               } else if (count == 1) {
+                       bytes = 1;
+               } else {
+                       bytes = 2;
+               }
+               copy_to_user(user_buf, from, bytes);
+               user_buf += bytes;
+       }
+       return *ppos - pos;
+}
+
+static const struct file_operations fops_eeprom = {
+       .read = read_file_eeprom,
+       .open = simple_open,
+       .owner = THIS_MODULE
+};
+
 int ath9k_init_debug(struct ath_hw *ah)
 {
        struct ath_common *common = ath9k_hw_common(ah);
@@ -1393,6 +1440,8 @@ int ath9k_init_debug(struct ath_hw *ah)
        ath9k_tx99_init_debug(sc);
        ath9k_cmn_spectral_init_debug(&sc->spec_priv, sc->debug.debugfs_phy);
 
+       debugfs_create_file("eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
+                           &fops_eeprom);
        debugfs_create_devm_seqfile(sc->dev, "dma", sc->debug.debugfs_phy,
                                    read_file_dma);
        debugfs_create_devm_seqfile(sc->dev, "interrupt", sc->debug.debugfs_phy,