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authorAlexandru Tachici <alexandru.tachici@analog.com>2020-08-12 17:20:53 +0300
committerGuenter Roeck <linux@roeck-us.net>2020-09-23 09:42:41 -0700
commited1ff457e1870425ea8d3c8643d9aeb7fa54300f (patch)
treefb3456633c72ddd9984962d1e54b2aecd1a4bc74 /drivers/hwmon
parentd98dfad35c38c037b37c4adc99df01da571031a5 (diff)
downloadlinux-ed1ff457e1870425ea8d3c8643d9aeb7fa54300f.tar.bz2
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')
-rw-r--r--drivers/hwmon/pmbus/adm1266.c41
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[] = {