[PATCH v2 5/5] eeprom: at24: fix device name handling

[Marco Felsch <m.felsch@pengutronix.de>]

The at24 driver does not need to handle the ids by its own since the
nvmem_core does the handling too. This lead into issues where the eeprom
device is named: eeprom00.

Fix the alias handling too since the devie would never be named as
described in the alias, since we never told the nvmem-core to not add an
additional id.

Furthermore the devname can be static since the name gets later
allocated by the dev_set_name().

Fix these three issues by just using the alias or the static "eeprom"
sting and supply the correct NVMEM_DEVID_NONE or NVMEM_DEVID_AUTO to the
core.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
v2:
- no changes

 drivers/eeprom/at24.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/eeprom/at24.c b/drivers/eeprom/at24.c
index 23cb0e1fbbc9..a5079279af35 100644
--- a/drivers/eeprom/at24.c
+++ b/drivers/eeprom/at24.c
@@ -371,7 +371,7 @@ static int at24_probe(struct device *dev)
 	struct at24_data *at24;
 	int err;
 	unsigned i, num_addresses;
-	char *devname;
+	const char *devname;
 	const char *alias;
 
 	if (dev->platform_data) {
@@ -425,16 +425,10 @@ static int at24_probe(struct device *dev)
 	at24->num_addresses = num_addresses;
 
 	alias = of_alias_get(dev->of_node);
-	if (alias) {
-		devname = xstrdup(alias);
-	} else {
-		err = cdev_find_free_index("eeprom");
-		if (err < 0) {
-			dev_err(&client->dev, "no index found to name device\n");
-			goto err_device_name;
-		}
-		devname = xasprintf("eeprom%d", err);
-	}
+	if (alias)
+		devname = alias;
+	else
+		devname = "eeprom";
 
 	writable = !(chip.flags & AT24_FLAG_READONLY);
 
@@ -489,6 +483,7 @@ static int at24_probe(struct device *dev)
 	at24->nvmem_config.stride = 1;
 	at24->nvmem_config.word_size = 1;
 	at24->nvmem_config.size = chip.byte_len;
+	at24->nvmem_config.id = alias ? NVMEM_DEVID_NONE : NVMEM_DEVID_AUTO;
 
 	at24->nvmem = nvmem_register(&at24->nvmem_config);
 	err = PTR_ERR_OR_ZERO(at24->nvmem);
@@ -505,7 +500,6 @@ static int at24_probe(struct device *dev)
 	if (gpio_is_valid(at24->wp_gpio))
 		gpio_free(at24->wp_gpio);
 	kfree(at24->writebuf);
-err_device_name:
 	kfree(at24);
 err_out:
 	dev_dbg(&client->dev, "probe error %d\n", err);
-- 
2.39.2