diff options
| author | Alexandru Tachici <alexandru.tachici@analog.com> | 2020-08-12 17:20:53 +0300 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2020-09-23 09:42:41 -0700 |
| commit | ed1ff457e1870425ea8d3c8643d9aeb7fa54300f (patch) | |
| tree | fb3456633c72ddd9984962d1e54b2aecd1a4bc74 /drivers/hwmon/pmbus | |
| parent | d98dfad35c38c037b37c4adc99df01da571031a5 (diff) | |
hwmon: (pmbus/adm1266) add debugfs for states
Add a debugfs entry which prints the current state
of the adm1266 sequencer.
Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com>
Link: https://lore.kernel.org/r/20200812142055.9213-5-alexandru.tachici@analog.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/pmbus')
| -rw-r--r-- | drivers/hwmon/pmbus/adm1266.c | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/drivers/hwmon/pmbus/adm1266.c b/drivers/hwmon/pmbus/adm1266.c index bcc8a78c2725..e129a88e58f5 100644 --- a/drivers/hwmon/pmbus/adm1266.c +++ b/drivers/hwmon/pmbus/adm1266.c @@ -19,6 +19,7 @@ #include <linux/slab.h> #define ADM1266_PDIO_CONFIG 0xD4 +#define ADM1266_READ_STATE 0xD9 #define ADM1266_GPIO_CONFIG 0xE1 #define ADM1266_PDIO_STATUS 0xE9 #define ADM1266_GPIO_STATUS 0xEA @@ -43,6 +44,7 @@ struct adm1266_data { struct gpio_chip gc; const char *gpio_names[ADM1266_GPIO_NR + ADM1266_PDIO_NR]; struct i2c_client *client; + struct dentry *debugfs_dir; struct mutex buf_mutex; u8 write_buf[ADM1266_PMBUS_BLOCK_MAX + 1] ____cacheline_aligned; u8 read_buf[ADM1266_PMBUS_BLOCK_MAX + 1] ____cacheline_aligned; @@ -292,6 +294,37 @@ static int adm1266_config_gpio(struct adm1266_data *data) return ret; } +static int adm1266_state_read(struct seq_file *s, void *pdata) +{ + struct device *dev = s->private; + struct i2c_client *client = to_i2c_client(dev); + int ret; + + ret = i2c_smbus_read_word_data(client, ADM1266_READ_STATE); + if (ret < 0) + return ret; + + seq_printf(s, "%d\n", ret); + + return 0; +} + +static void adm1266_init_debugfs(struct adm1266_data *data) +{ + struct dentry *root; + + root = pmbus_get_debugfs_dir(data->client); + if (!root) + return; + + data->debugfs_dir = debugfs_create_dir(data->client->name, root); + if (!data->debugfs_dir) + return; + + debugfs_create_devm_seqfile(&data->client->dev, "sequencer_state", data->debugfs_dir, + adm1266_state_read); +} + static int adm1266_probe(struct i2c_client *client) { struct adm1266_data *data; @@ -315,7 +348,13 @@ static int adm1266_probe(struct i2c_client *client) if (ret < 0) return ret; - return pmbus_do_probe(client, &data->info); + ret = pmbus_do_probe(client, &data->info); + if (ret) + return ret; + + adm1266_init_debugfs(data); + + return 0; } static const struct of_device_id adm1266_of_match[] = { |