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hwmon: (k10temp) Add debugfs support

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Show thermal and SVI registers for Family 17h CPUs.

Tested-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2020-01-21 21:33:54 -08:00
parent 70831c8a91
commit 9c4a38f19e
1 changed files with 77 additions and 1 deletions
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78
drivers/hwmon/k10temp.c
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@ -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[] = {