[PATCH 1/3 v6] gpio: pcf857x: Name instance after dev_name()

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

Put the label on this gpio_chip from the dev_name() instead of
the client name.

The client name will be pcf8574 etc for all instances even if
there are several chips on a system.

This manifests on the DaVinci DM6467 (non-devicetree) which
will contain 3 different pcf8574 devices that as a result cannot
be told apart because they are all named "pcf8574", affecting
the GPIO descriptor tables which need a unique label per chip.

By passing in .dev_name in the struct i2c_board_info we can
explicitly name each instance and use that to discern the chips
when using board files.

Cc: Sekhar Nori <nsekhar@xxxxxx>
Cc: Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
ChangeLog v5->v6:
- Rebase on v5.14-rc1
ChangeLog ->v5:
- New patch to deal with the chip label
---
 drivers/gpio/gpio-pcf857x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index b7568ee33696..2271ec86e414 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -311,7 +311,7 @@ static int pcf857x_probe(struct i2c_client *client,
 	if (status < 0)
 		goto fail;
 
-	gpio->chip.label = client->name;
+	gpio->chip.label = dev_name(&client->dev);
 
 	gpio->client = client;
 	i2c_set_clientdata(client, gpio);
-- 
2.31.1