| Message ID | 20200910021106.2958382-1-andrew@aj.id.au (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v2] hwmon: (pmbus) Expose PEC debugfs attribute | expand |
On 9/9/20 7:11 PM, Andrew Jeffery wrote: > Enable runtime debug control of whether the PEC byte is exchanged with > the PMBus device. > > Some manufacturers have asked for the PEC to be disabled as part of > debugging driver communication issues with devices. > > Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Applied. Thanks, Guenter > --- > drivers/hwmon/pmbus/pmbus_core.c | 39 ++++++++++++++++++++++++++++++++ > 1 file changed, 39 insertions(+) > > diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c > index 44535add3a4a..9e7d5f7f0cd0 100644 > --- a/drivers/hwmon/pmbus/pmbus_core.c > +++ b/drivers/hwmon/pmbus/pmbus_core.c > @@ -2346,6 +2346,42 @@ static int pmbus_debugfs_get_status(void *data, u64 *val) > DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_status, pmbus_debugfs_get_status, > NULL, "0x%04llx\n"); > > +static int pmbus_debugfs_get_pec(void *data, u64 *val) > +{ > + struct i2c_client *client = data; > + > + *val = !!(client->flags & I2C_CLIENT_PEC); > + > + return 0; > +} > + > +static int pmbus_debugfs_set_pec(void *data, u64 val) > +{ > + int rc; > + struct i2c_client *client = data; > + > + if (!val) { > + client->flags &= ~I2C_CLIENT_PEC; > + return 0; > + } > + > + if (val != 1) > + return -EINVAL; > + > + rc = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY); > + if (rc < 0) > + return rc; > + > + if (!(rc & PB_CAPABILITY_ERROR_CHECK)) > + return -EOPNOTSUPP; > + > + client->flags |= I2C_CLIENT_PEC; > + > + return 0; > +} > +DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_pec, pmbus_debugfs_get_pec, > + pmbus_debugfs_set_pec, "%1llu\n"); > + > static int pmbus_init_debugfs(struct i2c_client *client, > struct pmbus_data *data) > { > @@ -2374,6 +2410,9 @@ static int pmbus_init_debugfs(struct i2c_client *client, > if (!entries) > return -ENOMEM; > > + debugfs_create_file("pec", 0664, data->debugfs, client, > + &pmbus_debugfs_ops_pec); > + > for (i = 0; i < data->info->pages; ++i) { > /* Check accessibility of status register if it's not page 0 */ > if (!i || pmbus_check_status_register(client, i)) { >
diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index 44535add3a4a..9e7d5f7f0cd0 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -2346,6 +2346,42 @@ static int pmbus_debugfs_get_status(void *data, u64 *val) DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_status, pmbus_debugfs_get_status, NULL, "0x%04llx\n"); +static int pmbus_debugfs_get_pec(void *data, u64 *val) +{ + struct i2c_client *client = data; + + *val = !!(client->flags & I2C_CLIENT_PEC); + + return 0; +} + +static int pmbus_debugfs_set_pec(void *data, u64 val) +{ + int rc; + struct i2c_client *client = data; + + if (!val) { + client->flags &= ~I2C_CLIENT_PEC; + return 0; + } + + if (val != 1) + return -EINVAL; + + rc = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY); + if (rc < 0) + return rc; + + if (!(rc & PB_CAPABILITY_ERROR_CHECK)) + return -EOPNOTSUPP; + + client->flags |= I2C_CLIENT_PEC; + + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(pmbus_debugfs_ops_pec, pmbus_debugfs_get_pec, + pmbus_debugfs_set_pec, "%1llu\n"); + static int pmbus_init_debugfs(struct i2c_client *client, struct pmbus_data *data) { @@ -2374,6 +2410,9 @@ static int pmbus_init_debugfs(struct i2c_client *client, if (!entries) return -ENOMEM; + debugfs_create_file("pec", 0664, data->debugfs, client, + &pmbus_debugfs_ops_pec); + for (i = 0; i < data->info->pages; ++i) { /* Check accessibility of status register if it's not page 0 */ if (!i || pmbus_check_status_register(client, i)) {
Enable runtime debug control of whether the PEC byte is exchanged with the PMBus device. Some manufacturers have asked for the PEC to be disabled as part of debugging driver communication issues with devices. Signed-off-by: Andrew Jeffery <andrew@aj.id.au> --- drivers/hwmon/pmbus/pmbus_core.c | 39 ++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+)