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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>
This commit is contained in:
Alexandru Tachici 2020-08-12 17:20:53 +03:00 committed by Guenter Roeck
parent d98dfad35c
commit ed1ff457e1
1 changed files with 40 additions and 1 deletions
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41
drivers/hwmon/pmbus/adm1266.c
View File

@ -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[] = {