Commit ed1ff457 authored by Alexandru Tachici's avatar Alexandru Tachici Committed by Guenter Roeck
Browse files

hwmon: (pmbus/adm1266) add debugfs for states 



Add a debugfs entry which prints the current state
of the adm1266 sequencer.

Signed-off-by: default avatarAlexandru Tachici <alexandru.tachici@analog.com>
Link: https://lore.kernel.org/r/20200812142055.9213-5-alexandru.tachici@analog.com


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent d98dfad3

drivers/hwmon/pmbus/adm1266.c

+40 −1
Original line number Diff line number Diff line
@@ -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[] = {