dsa: mv88e6xxx: Add debugfs interface for registers
Allow the contents of the registers to be shown in debugfs.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/dsa/mv88e6xxx.c b/drivers/net/dsa/mv88e6xxx.c
index 39530fa..e6dbc4a 100644
--- a/drivers/net/dsa/mv88e6xxx.c
+++ b/drivers/net/dsa/mv88e6xxx.c
@@ -8,6 +8,7 @@
* (at your option) any later version.
*/
+#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/if_bridge.h>
@@ -16,6 +17,7 @@
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
+#include <linux/seq_file.h>
#include <net/dsa.h>
#include "mv88e6xxx.h"
@@ -1601,9 +1603,50 @@
return 0;
}
+static int mv88e6xxx_regs_show(struct seq_file *s, void *p)
+{
+ struct dsa_switch *ds = s->private;
+
+ struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
+ int reg, port;
+
+ seq_puts(s, " GLOBAL GLOBAL2 ");
+ for (port = 0 ; port < ps->num_ports; port++)
+ seq_printf(s, " %2d ", port);
+ seq_puts(s, "\n");
+
+ for (reg = 0; reg < 32; reg++) {
+ seq_printf(s, "%2x: ", reg);
+ seq_printf(s, " %4x %4x ",
+ mv88e6xxx_reg_read(ds, REG_GLOBAL, reg),
+ mv88e6xxx_reg_read(ds, REG_GLOBAL2, reg));
+
+ for (port = 0 ; port < ps->num_ports; port++)
+ seq_printf(s, "%4x ",
+ mv88e6xxx_reg_read(ds, REG_PORT(port), reg));
+ seq_puts(s, "\n");
+ }
+
+ return 0;
+}
+
+static int mv88e6xxx_regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mv88e6xxx_regs_show, inode->i_private);
+}
+
+static const struct file_operations mv88e6xxx_regs_fops = {
+ .open = mv88e6xxx_regs_open,
+ .read = seq_read,
+ .llseek = no_llseek,
+ .release = single_release,
+ .owner = THIS_MODULE,
+};
+
int mv88e6xxx_setup_common(struct dsa_switch *ds)
{
struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
+ char *name;
mutex_init(&ps->smi_mutex);
@@ -1613,6 +1656,13 @@
INIT_WORK(&ps->bridge_work, mv88e6xxx_bridge_work);
+ name = kasprintf(GFP_KERNEL, "dsa%d", ds->index);
+ ps->dbgfs = debugfs_create_dir(name, NULL);
+ kfree(name);
+
+ debugfs_create_file("regs", S_IRUGO, ps->dbgfs, ds,
+ &mv88e6xxx_regs_fops);
+
return 0;
}