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Commit 7d68849f authored by Arend van Spriel's avatar Arend van Spriel Committed by John W. Linville
Browse files

brcmfmac: expose chip information through debugfs 



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

Reviewed-by: default avatarHante Meuleman <meuleman@broadcom.com>
Reviewed-by: default avatarPieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: default avatarArend van Spriel <arend@broadcom.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 01376a07

drivers/net/wireless/brcm80211/brcmfmac/dhd_dbg.c

+35 −1
Original line number Diff line number Diff line
@@ -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);

}