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hwmon: (pmbus/ibm-cffps) Add new manufacturer debugfs entries

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Add support for a number of manufacturer-specific registers in the
debugfs entries, as well as support to read and write the
PMBUS_ON_OFF_CONFIG register through debugfs.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/1576788607-13567-2-git-send-email-eajames@linux.ibm.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Eddie James 2019-12-19 14:50:05 -06:00 • committed by Guenter Roeck
parent cce209581a
commit abe508b66d
1 changed files with 70 additions and 4 deletions
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74
drivers/hwmon/pmbus/ibm-cffps.c
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@ -20,7 +20,9 @@
#define CFFPS_FRU_CMD 0x9A #define CFFPS_FRU_CMD 0x9A
#define CFFPS_PN_CMD 0x9B #define CFFPS_PN_CMD 0x9B
#define CFFPS_HEADER_CMD 0x9C
#define CFFPS_SN_CMD 0x9E #define CFFPS_SN_CMD 0x9E
#define CFFPS_MAX_POWER_OUT_CMD 0xA7
#define CFFPS_CCIN_CMD 0xBD #define CFFPS_CCIN_CMD 0xBD
#define CFFPS_FW_CMD 0xFA #define CFFPS_FW_CMD 0xFA
#define CFFPS1_FW_NUM_BYTES 4 #define CFFPS1_FW_NUM_BYTES 4
@ -57,9 +59,12 @@ enum {
CFFPS_DEBUGFS_INPUT_HISTORY = 0, CFFPS_DEBUGFS_INPUT_HISTORY = 0,
CFFPS_DEBUGFS_FRU, CFFPS_DEBUGFS_FRU,
CFFPS_DEBUGFS_PN, CFFPS_DEBUGFS_PN,
CFFPS_DEBUGFS_HEADER,
CFFPS_DEBUGFS_SN, CFFPS_DEBUGFS_SN,
CFFPS_DEBUGFS_MAX_POWER_OUT,
CFFPS_DEBUGFS_CCIN, CFFPS_DEBUGFS_CCIN,
CFFPS_DEBUGFS_FW, CFFPS_DEBUGFS_FW,
CFFPS_DEBUGFS_ON_OFF_CONFIG,
CFFPS_DEBUGFS_NUM_ENTRIES CFFPS_DEBUGFS_NUM_ENTRIES
}; };
@ -136,15 +141,15 @@ static ssize_t ibm_cffps_read_input_history(struct ibm_cffps *psu,
psu->input_history.byte_count); psu->input_history.byte_count);
} }
static ssize_t ibm_cffps_debugfs_op(struct file *file, char __user *buf, static ssize_t ibm_cffps_debugfs_read(struct file *file, char __user *buf,
size_t count, loff_t *ppos) size_t count, loff_t *ppos)
{ {
u8 cmd; u8 cmd;
int i, rc; int i, rc;
int *idxp = file->private_data; int *idxp = file->private_data;
int idx = *idxp; int idx = *idxp;
struct ibm_cffps *psu = to_psu(idxp, idx); struct ibm_cffps *psu = to_psu(idxp, idx);
char data[I2C_SMBUS_BLOCK_MAX] = { 0 }; char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
pmbus_set_page(psu->client, 0); pmbus_set_page(psu->client, 0);
@ -157,9 +162,20 @@ static ssize_t ibm_cffps_debugfs_op(struct file *file, char __user *buf,
case CFFPS_DEBUGFS_PN: case CFFPS_DEBUGFS_PN:
cmd = CFFPS_PN_CMD; cmd = CFFPS_PN_CMD;
break; break;
case CFFPS_DEBUGFS_HEADER:
cmd = CFFPS_HEADER_CMD;
break;
case CFFPS_DEBUGFS_SN: case CFFPS_DEBUGFS_SN:
cmd = CFFPS_SN_CMD; cmd = CFFPS_SN_CMD;
break; break;
case CFFPS_DEBUGFS_MAX_POWER_OUT:
rc = i2c_smbus_read_word_swapped(psu->client,
CFFPS_MAX_POWER_OUT_CMD);
if (rc < 0)
return rc;
rc = snprintf(data, I2C_SMBUS_BLOCK_MAX, "%d", rc);
goto done;
case CFFPS_DEBUGFS_CCIN: case CFFPS_DEBUGFS_CCIN:
rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD); rc = i2c_smbus_read_word_swapped(psu->client, CFFPS_CCIN_CMD);
if (rc < 0) if (rc < 0)
@ -199,6 +215,14 @@ static ssize_t ibm_cffps_debugfs_op(struct file *file, char __user *buf,
return -EOPNOTSUPP; return -EOPNOTSUPP;
} }
goto done; goto done;
case CFFPS_DEBUGFS_ON_OFF_CONFIG:
rc = i2c_smbus_read_byte_data(psu->client,
PMBUS_ON_OFF_CONFIG);
if (rc < 0)
return rc;
rc = snprintf(data, 3, "%02x", rc);
goto done;
default: default:
return -EINVAL; return -EINVAL;
} }
@ -214,9 +238,42 @@ done:
return simple_read_from_buffer(buf, count, ppos, data, rc); return simple_read_from_buffer(buf, count, ppos, data, rc);
} }
static ssize_t ibm_cffps_debugfs_write(struct file *file,
const char __user *buf, size_t count,
loff_t *ppos)
{
u8 data;
ssize_t rc;
int *idxp = file->private_data;
int idx = *idxp;
struct ibm_cffps *psu = to_psu(idxp, idx);
switch (idx) {
case CFFPS_DEBUGFS_ON_OFF_CONFIG:
pmbus_set_page(psu->client, 0);
rc = simple_write_to_buffer(&data, 1, ppos, buf, count);
if (rc < 0)
return rc;
rc = i2c_smbus_write_byte_data(psu->client,
PMBUS_ON_OFF_CONFIG, data);
if (rc)
return rc;
rc = 1;
break;
default:
return -EINVAL;
}
return rc;
}
static const struct file_operations ibm_cffps_fops = { static const struct file_operations ibm_cffps_fops = {
.llseek = noop_llseek, .llseek = noop_llseek,
.read = ibm_cffps_debugfs_op, .read = ibm_cffps_debugfs_read,
.write = ibm_cffps_debugfs_write,
.open = simple_open, .open = simple_open,
}; };
@ -486,15 +543,24 @@ static int ibm_cffps_probe(struct i2c_client *client,
debugfs_create_file("part_number", 0444, ibm_cffps_dir, debugfs_create_file("part_number", 0444, ibm_cffps_dir,
&psu->debugfs_entries[CFFPS_DEBUGFS_PN], &psu->debugfs_entries[CFFPS_DEBUGFS_PN],
&ibm_cffps_fops); &ibm_cffps_fops);
debugfs_create_file("header", 0444, ibm_cffps_dir,
&psu->debugfs_entries[CFFPS_DEBUGFS_HEADER],
&ibm_cffps_fops);
debugfs_create_file("serial_number", 0444, ibm_cffps_dir, debugfs_create_file("serial_number", 0444, ibm_cffps_dir,
&psu->debugfs_entries[CFFPS_DEBUGFS_SN], &psu->debugfs_entries[CFFPS_DEBUGFS_SN],
&ibm_cffps_fops); &ibm_cffps_fops);
debugfs_create_file("max_power_out", 0444, ibm_cffps_dir,
&psu->debugfs_entries[CFFPS_DEBUGFS_MAX_POWER_OUT],
&ibm_cffps_fops);
debugfs_create_file("ccin", 0444, ibm_cffps_dir, debugfs_create_file("ccin", 0444, ibm_cffps_dir,
&psu->debugfs_entries[CFFPS_DEBUGFS_CCIN], &psu->debugfs_entries[CFFPS_DEBUGFS_CCIN],
&ibm_cffps_fops); &ibm_cffps_fops);
debugfs_create_file("fw_version", 0444, ibm_cffps_dir, debugfs_create_file("fw_version", 0444, ibm_cffps_dir,
&psu->debugfs_entries[CFFPS_DEBUGFS_FW], &psu->debugfs_entries[CFFPS_DEBUGFS_FW],
&ibm_cffps_fops); &ibm_cffps_fops);
debugfs_create_file("on_off_config", 0644, ibm_cffps_dir,
&psu->debugfs_entries[CFFPS_DEBUGFS_ON_OFF_CONFIG],
&ibm_cffps_fops);
return 0; return 0;
} }