Commit 9c4a38f1 authored by Guenter Roeck's avatar Guenter Roeck
Browse files

hwmon: (k10temp) Add debugfs support 



Show thermal and SVI registers for Family 17h CPUs.

Tested-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 70831c8a

drivers/hwmon/k10temp.c

+77 −1
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
 */



#include <linux/bitops.h>

#include <linux/debugfs.h>

#include <linux/err.h>

#include <linux/hwmon.h>

#include <linux/init.h>
@@ -442,6 +443,76 @@ static bool has_erratum_319(struct pci_dev *pdev) 
	       (boot_cpu_data.x86_model == 4 && boot_cpu_data.x86_stepping <= 2);

}



#ifdef CONFIG_DEBUG_FS



static void k10temp_smn_regs_show(struct seq_file *s, struct pci_dev *pdev,

				  u32 addr, int count)

{

	u32 reg;

	int i;



	for (i = 0; i < count; i++) {

		if (!(i & 3))

			seq_printf(s, "0x%06x: ", addr + i * 4);

		amd_smn_read(amd_pci_dev_to_node_id(pdev), addr + i * 4, &reg);

		seq_printf(s, "%08x ", reg);

		if ((i & 3) == 3)

			seq_puts(s, "\n");

	}

}



static int svi_show(struct seq_file *s, void *unused)

{

	struct k10temp_data *data = s->private;



	k10temp_smn_regs_show(s, data->pdev, F17H_M01H_SVI, 32);

	return 0;

}

DEFINE_SHOW_ATTRIBUTE(svi);



static int thm_show(struct seq_file *s, void *unused)

{

	struct k10temp_data *data = s->private;



	k10temp_smn_regs_show(s, data->pdev,

			      F17H_M01H_REPORTED_TEMP_CTRL_OFFSET, 256);

	return 0;

}

DEFINE_SHOW_ATTRIBUTE(thm);



static void k10temp_debugfs_cleanup(void *ddir)

{

	debugfs_remove_recursive(ddir);

}



static void k10temp_init_debugfs(struct k10temp_data *data)

{

	struct dentry *debugfs;

	char name[32];



	/* Only show debugfs data for Family 17h/18h CPUs */

	if (!data->show_tdie)

		return;



	scnprintf(name, sizeof(name), "k10temp-%s", pci_name(data->pdev));



	debugfs = debugfs_create_dir(name, NULL);

	if (debugfs) {

		debugfs_create_file("svi", 0444, debugfs, data, &svi_fops);

		debugfs_create_file("thm", 0444, debugfs, data, &thm_fops);

		devm_add_action_or_reset(&data->pdev->dev,

					 k10temp_debugfs_cleanup, debugfs);

	}

}



#else



static void k10temp_init_debugfs(struct k10temp_data *data)

{

}



#endif



static const struct hwmon_channel_info *k10temp_info[] = {

	HWMON_CHANNEL_INFO(temp,

			   HWMON_T_INPUT | HWMON_T_MAX |
@@ -553,7 +624,12 @@ static int k10temp_probe(struct pci_dev *pdev, const struct pci_device_id *id) 
	hwmon_dev = devm_hwmon_device_register_with_info(dev, "k10temp", data,

							 &k10temp_chip_info,

							 NULL);

	return PTR_ERR_OR_ZERO(hwmon_dev);

	if (IS_ERR(hwmon_dev))

		return PTR_ERR(hwmon_dev);



	k10temp_init_debugfs(data);



	return 0;

}



static const struct pci_device_id k10temp_id_table[] = {