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ath9k: add debugfs support for hw TPC

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Add tpc entry to ath9k debugfs in order to enable/disable hw TPC

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Lorenzo Bianconi 2014-12-19 00:18:13 +01:00 committed by Kalle Valo
parent a9abe3023a
commit 8718389b1c
1 changed files with 71 additions and 0 deletions
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71
drivers/net/wireless/ath/ath9k/debug.c
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@ -1115,6 +1115,75 @@ static const struct file_operations fops_ackto = {
};
#endif
static ssize_t read_file_tpc(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;
unsigned int len = 0, size = 32;
ssize_t retval;
char *buf;
buf = kzalloc(size, GFP_KERNEL);
if (!buf)
return -ENOMEM;
len += scnprintf(buf + len, size - len, "%s\n",
ah->tpc_enabled ? "ENABLED" : "DISABLED");
if (len > size)
len = size;
retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
kfree(buf);
return retval;
}
static ssize_t write_file_tpc(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_hw *ah = sc->sc_ah;
unsigned long val;
char buf[32];
ssize_t len;
bool tpc_enabled;
if (!AR_SREV_9300_20_OR_LATER(ah)) {
/* ar9002 does not support TPC for the moment */
return -EOPNOTSUPP;
}
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
if (kstrtoul(buf, 0, &val))
return -EINVAL;
if (val < 0 || val > 1)
return -EINVAL;
tpc_enabled = !!val;
if (tpc_enabled != ah->tpc_enabled) {
ah->tpc_enabled = tpc_enabled;
ath9k_hw_set_txpowerlimit(ah, sc->cur_chan->txpower, false);
}
return count;
}
static const struct file_operations fops_tpc = {
.read = read_file_tpc,
.write = write_file_tpc,
.open = simple_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
/* Ethtool support for get-stats */
#define AMKSTR(nm) #nm "_BE", #nm "_BK", #nm "_VI", #nm "_VO"
@ -1324,6 +1393,8 @@ int ath9k_init_debug(struct ath_hw *ah)
debugfs_create_file("ack_to", S_IRUSR | S_IWUSR, sc->debug.debugfs_phy,
sc, &fops_ackto);
#endif
debugfs_create_file("tpc", S_IRUSR | S_IWUSR,
sc->debug.debugfs_phy, sc, &fops_tpc);
return 0;
}