ath9k: Dump modal eeprom header

Debugfs file location:
<debugfs_mnt>/ieee80211/phy#/ath9k/modal_eeprom
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/debug.c

@@ -1191,6 +1191,34 @@ static const struct file_operations fops_base_eeprom = {
 	.llseek = default_llseek,
 };
 
+static ssize_t read_file_modal_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;
+	u32 len = 0, size = 6000;
+	char *buf;
+	size_t retval;
+
+	buf = kzalloc(size, GFP_KERNEL);
+	if (buf == NULL)
+		return -ENOMEM;
+
+	len = ah->eep_ops->dump_eeprom(ah, false, buf, len, size);
+
+	retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
+	kfree(buf);
+
+	return retval;
+}
+
+static const struct file_operations fops_modal_eeprom = {
+	.read = read_file_modal_eeprom,
+	.open = ath9k_debugfs_open,
+	.owner = THIS_MODULE,
+	.llseek = default_llseek,
+};
+
 int ath9k_init_debug(struct ath_hw *ah)
 {
 	struct ath_common *common = ath9k_hw_common(ah);
@@ -1236,6 +1264,8 @@ int ath9k_init_debug(struct ath_hw *ah)
 			    &fops_regdump);
 	debugfs_create_file("base_eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
 			    &fops_base_eeprom);
+	debugfs_create_file("modal_eeprom", S_IRUSR, sc->debug.debugfs_phy, sc,
+			    &fops_modal_eeprom);
 
 	debugfs_create_u32("gpio_mask", S_IRUSR | S_IWUSR,
 			   sc->debug.debugfs_phy, &sc->sc_ah->gpio_mask);