Commit 87c8cefb authored Jun 20, 2015 by Andrew Lunn Committed by David S. Miller Jun 23, 2015

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>

parent 45dac1d6

drivers/net/dsa/mv88e6xxx.c

+50 −0

Original line number	Diff line number	Diff line
		@@ -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 @@ int mv88e6xxx_setup_ports(struct dsa_switch *ds)
		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 @@ int mv88e6xxx_setup_common(struct dsa_switch *ds)

		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;
		}

drivers/net/dsa/mv88e6xxx.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -339,6 +339,8 @@ struct mv88e6xxx_priv_state {
		u8 port_state[DSA_MAX_PORTS];

		struct work_struct bridge_work;

		struct dentry *dbgfs;
		};

		struct mv88e6xxx_hw_stat {