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brcmfmac: expose chip information through debugfs 

Adding the debugfs file <debugfs_mnt>/brcmfmac/<devid>/chipinfo
which contains the chip number and revision.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
hifive-unleashed-5.1
Arend van Spriel 2013-11-29 12:25:24 +01:00 committed by John W. Linville
parent 01376a07bc
commit 7d68849f40
1 changed files with 35 additions and 1 deletions
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36
drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c
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@ -22,7 +22,6 @@
#include "dhd.h"
#include "dhd_bus.h"
#include "dhd_dbg.h"
#include "tracepoint.h"
static struct dentry *root_folder;
@ -42,6 +41,40 @@ void brcmf_debugfs_exit(void)
root_folder = NULL;
}
static
ssize_t brcmf_debugfs_chipinfo_read(struct file *f, char __user *data,
size_t count, loff_t *ppos)
{
struct brcmf_pub *drvr = f->private_data;
struct brcmf_bus *bus = drvr->bus_if;
char buf[40];
int res;
/* only allow read from start */
if (*ppos > 0)
return 0;
res = scnprintf(buf, sizeof(buf), "chip: %x(%u) rev %u\n",
bus->chip, bus->chip, bus->chiprev);
return simple_read_from_buffer(data, count, ppos, buf, res);
}
static const struct file_operations brcmf_debugfs_chipinfo_ops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = brcmf_debugfs_chipinfo_read
};
static int brcmf_debugfs_create_chipinfo(struct brcmf_pub *drvr)
{
struct dentry *dentry = drvr->dbgfs_dir;
if (!IS_ERR_OR_NULL(dentry))
debugfs_create_file("chipinfo", S_IRUGO, dentry, drvr,
&brcmf_debugfs_chipinfo_ops);
return 0;
}
int brcmf_debugfs_attach(struct brcmf_pub *drvr)
{
struct device *dev = drvr->bus_if->dev;
@ -50,6 +83,7 @@ int brcmf_debugfs_attach(struct brcmf_pub *drvr)
return -ENODEV;
drvr->dbgfs_dir = debugfs_create_dir(dev_name(dev), root_folder);
brcmf_debugfs_create_chipinfo(drvr);
return PTR_ERR_OR_ZERO(drvr->dbgfs_dir);
}