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brcmfmac: add "reset" debugfs entry for testing reset

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This is a trivial debugfs entry for triggering reset just like in case
of firmware crash. It works by writing 1 to it:
echo 1 > reset

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Rafał Miłecki 2019-09-01 13:34:36 +02:00 committed by Kalle Valo
parent cb34212b1c
commit 2f8c8e62cd
1 changed files with 25 additions and 0 deletions
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25
drivers/net/wireless/broadcom/brcm80211/brcmfmac/core.c
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@ -1086,6 +1086,29 @@ static void brcmf_core_bus_reset(struct work_struct *work)
brcmf_bus_reset(drvr->bus_if);
}
static ssize_t bus_reset_write(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct brcmf_pub *drvr = file->private_data;
u8 value;
if (kstrtou8_from_user(user_buf, count, 0, &value))
return -EINVAL;
if (value != 1)
return -EINVAL;
schedule_work(&drvr->bus_reset);
return count;
}
static const struct file_operations bus_reset_fops = {
.open = simple_open,
.llseek = no_llseek,
.write = bus_reset_write,
};
static int brcmf_bus_started(struct brcmf_pub *drvr, struct cfg80211_ops *ops)
{
int ret = -1;
@ -1161,6 +1184,8 @@ static int brcmf_bus_started(struct brcmf_pub *drvr, struct cfg80211_ops *ops)
/* populate debugfs */
brcmf_debugfs_add_entry(drvr, "revinfo", brcmf_revinfo_read);
debugfs_create_file("reset", 0600, brcmf_debugfs_get_devdir(drvr), drvr,
&bus_reset_fops);
brcmf_feat_debugfs_create(drvr);
brcmf_proto_debugfs_create(drvr);
brcmf_bus_debugfs_create(bus_if);