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USB: serial: cp210x: clean up type detection

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Clean up attach somewhat by moving type detection into the quirk helper
and giving it a more generic name.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2021-07-05 10:20:14 +02:00
parent 33a61d2cc7
commit 33fb934a09
1 changed files with 12 additions and 11 deletions
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23
drivers/usb/serial/cp210x.c
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@ -2092,11 +2092,21 @@ static int cp210x_get_fw_version(struct usb_serial *serial, u16 value)
return 0;
}
static void cp210x_determine_quirks(struct usb_serial *serial)
static void cp210x_determine_type(struct usb_serial *serial)
{
struct cp210x_serial_private *priv = usb_get_serial_data(serial);
int ret;
ret = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
CP210X_GET_PARTNUM, &priv->partnum,
sizeof(priv->partnum));
if (ret < 0) {
dev_warn(&serial->interface->dev,
"querying part number failed\n");
priv->partnum = CP210X_PARTNUM_UNKNOWN;
return;
}
switch (priv->partnum) {
case CP210X_PARTNUM_CP2102N_QFN28:
case CP210X_PARTNUM_CP2102N_QFN24:
@ -2121,18 +2131,9 @@ static int cp210x_attach(struct usb_serial *serial)
if (!priv)
return -ENOMEM;
result = cp210x_read_vendor_block(serial, REQTYPE_DEVICE_TO_HOST,
CP210X_GET_PARTNUM, &priv->partnum,
sizeof(priv->partnum));
if (result < 0) {
dev_warn(&serial->interface->dev,
"querying part number failed\n");
priv->partnum = CP210X_PARTNUM_UNKNOWN;
}
usb_set_serial_data(serial, priv);
cp210x_determine_quirks(serial);
cp210x_determine_type(serial);
cp210x_init_max_speed(serial);
result = cp210x_gpio_init(serial);