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hwmon: (corsair-psu) add reporting of rail mode via debugfs

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Add reporting if the PSU is running in single or multi rail mode via
ocpmode debugfs entry. Also update the documentation and driver comments
accordingly.

Signed-off-by: Wilken Gottwalt <wilken.gottwalt@posteo.net>
Link: https://lore.kernel.org/r/YvS9PZKr0xqFqJny@monster.localdomain
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Wilken Gottwalt 2022-08-11 08:26:37 +00:00 committed by Guenter Roeck
parent e2769f5e7f
commit eb12f54876
2 changed files with 31 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Documentation/hwmon/corsair-psu.rst
View File

@ -86,8 +86,9 @@ Debugfs entries
---------------
======================= ========================================================
uptime Current uptime of the psu
ocpmode Single or multi rail mode of the PCIe power connectors
product Product name of the psu
uptime Session uptime of the psu
uptime_total Total uptime of the psu
vendor Vendor name of the psu
product Product name of the psu
======================= ========================================================

29
drivers/hwmon/corsair-psu.c
View File

@ -55,6 +55,7 @@
#define SECONDS_PER_DAY (SECONDS_PER_HOUR * 24)
#define RAIL_COUNT 3 /* 3v3 + 5v + 12v */
#define TEMP_COUNT 2
#define OCP_MULTI_RAIL 0x02
#define PSU_CMD_SELECT_RAIL 0x00 /* expects length 2 */
#define PSU_CMD_RAIL_VOLTS_HCRIT 0x40 /* the rest of the commands expect length 3 */
@ -71,9 +72,10 @@
#define PSU_CMD_RAIL_WATTS 0x96
#define PSU_CMD_VEND_STR 0x99
#define PSU_CMD_PROD_STR 0x9A
#define PSU_CMD_TOTAL_WATTS 0xEE
#define PSU_CMD_TOTAL_UPTIME 0xD1
#define PSU_CMD_UPTIME 0xD2
#define PSU_CMD_OCPMODE 0xD8
#define PSU_CMD_TOTAL_WATTS 0xEE
#define PSU_CMD_INIT 0xFE
#define L_IN_VOLTS "v_in"
@ -268,6 +270,7 @@ static int corsairpsu_get_value(struct corsairpsu_data *priv, u8 cmd, u8 rail, l
break;
case PSU_CMD_TOTAL_UPTIME:
case PSU_CMD_UPTIME:
case PSU_CMD_OCPMODE:
*val = tmp;
break;
default:
@ -660,6 +663,29 @@ static int product_show(struct seq_file *seqf, void *unused)
}
DEFINE_SHOW_ATTRIBUTE(product);
static int ocpmode_show(struct seq_file *seqf, void *unused)
{
struct corsairpsu_data *priv = seqf->private;
long val;
int ret;
/*
* The rail mode is switchable on the fly. The RAW interface can be used for this. But it
* will not be included here, because I consider it somewhat dangerous for the health of the
* PSU. The returned value can be a bogus one, if the PSU is in the process of switching and
* getting of the value itself can also fail during this. Because of this every other value
* than OCP_MULTI_RAIL can be considered as "single rail".
*/
ret = corsairpsu_get_value(priv, PSU_CMD_OCPMODE, 0, &val);
if (ret < 0)
seq_puts(seqf, "N/A\n");
else
seq_printf(seqf, "%s\n", (val == OCP_MULTI_RAIL) ? "multi rail" : "single rail");
return 0;
}
DEFINE_SHOW_ATTRIBUTE(ocpmode);
static void corsairpsu_debugfs_init(struct corsairpsu_data *priv)
{
char name[32];
@ -671,6 +697,7 @@ static void corsairpsu_debugfs_init(struct corsairpsu_data *priv)
debugfs_create_file("uptime_total", 0444, priv->debugfs, priv, &uptime_total_fops);
debugfs_create_file("vendor", 0444, priv->debugfs, priv, &vendor_fops);
debugfs_create_file("product", 0444, priv->debugfs, priv, &product_fops);
debugfs_create_file("ocpmode", 0444, priv->debugfs, priv, &ocpmode_fops);
}
#else