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Add CPLD versions to sysfs.

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This commit is contained in:
Jeffrey Townsend
2017-10-05 00:41:18 +00:00
parent e1baa8133c
commit 2cc3cf66d6
1 changed files with 32 additions and 16 deletions
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48
packages/platforms/accton/x86-64/x86-64-accton-as7312-54x/modules/builds/x86-64-accton-as7312-54x-cpld.c
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@@ -60,14 +60,14 @@ static const unsigned short normal_i2c[] = { 0x31, 0x35, 0x60, 0x62, 0x64, I2C_C
static void accton_i2c_cpld_add_client(struct i2c_client *client)
{
struct cpld_client_node *node = kzalloc(sizeof(struct cpld_client_node), GFP_KERNEL);
if (!node) {
dev_dbg(&client->dev, "Can't allocate cpld_client_node (0x%x)\n", client->addr);
return;
}
node->client = client;
mutex_lock(&list_lock);
list_add(&node->list, &cpld_client_list);
mutex_unlock(&list_lock);
@@ -78,27 +78,41 @@ static void accton_i2c_cpld_remove_client(struct i2c_client *client)
struct list_head *list_node = NULL;
struct cpld_client_node *cpld_node = NULL;
int found = 0;
mutex_lock(&list_lock);
list_for_each(list_node, &cpld_client_list)
{
cpld_node = list_entry(list_node, struct cpld_client_node, list);
if (cpld_node->client == client) {
found = 1;
break;
}
}
if (found) {
list_del(list_node);
kfree(cpld_node);
}
mutex_unlock(&list_lock);
}
static ssize_t show_cpld_version(struct device *dev, struct device_attribute *attr, char *buf)
{
u8 reg = 0x1;
struct i2c_client *client;
int len;
client = to_i2c_client(dev);
len = sprintf(buf, "%d", i2c_smbus_read_byte_data(client, reg));
return len;
}
static struct device_attribute ver = __ATTR(version, 0600, show_cpld_version, NULL);
static int accton_i2c_cpld_probe(struct i2c_client *client,
const struct i2c_device_id *dev_id)
{
@@ -112,7 +126,8 @@ static int accton_i2c_cpld_probe(struct i2c_client *client,
dev_info(&client->dev, "chip found\n");
accton_i2c_cpld_add_client(client);
sysfs_create_file(&client->dev.kobj, &ver.attr);
return 0;
exit:
@@ -121,9 +136,10 @@ exit:
static int accton_i2c_cpld_remove(struct i2c_client *client)
{
accton_i2c_cpld_remove_client(client);
return 0;
sysfs_remove_file(&client->dev.kobj, &ver.attr);
accton_i2c_cpld_remove_client(client);
return 0;
}
static const struct i2c_device_id accton_i2c_cpld_id[] = {
@@ -148,7 +164,7 @@ int as7312_54x_i2c_cpld_read(unsigned short cpld_addr, u8 reg)
struct list_head *list_node = NULL;
struct cpld_client_node *cpld_node = NULL;
int ret = -EPERM;
mutex_lock(&list_lock);
list_for_each(list_node, &cpld_client_list)
@@ -160,7 +176,7 @@ int as7312_54x_i2c_cpld_read(unsigned short cpld_addr, u8 reg)
break;
}
}
mutex_unlock(&list_lock);
return ret;
@@ -172,19 +188,19 @@ int as7312_54x_i2c_cpld_write(unsigned short cpld_addr, u8 reg, u8 value)
struct list_head *list_node = NULL;
struct cpld_client_node *cpld_node = NULL;
int ret = -EIO;
mutex_lock(&list_lock);
list_for_each(list_node, &cpld_client_list)
{
cpld_node = list_entry(list_node, struct cpld_client_node, list);
if (cpld_node->client->addr == cpld_addr) {
ret = i2c_smbus_write_byte_data(cpld_node->client, reg, value);
break;
}
}
mutex_unlock(&list_lock);
return ret;