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USB: serial: cp210x: add gpio-configuration debug printk 

Add a debug printk to dump the GPIO configuration stored in EEPROM
during probe.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2021-04-09 17:52:16 +02:00
parent b979248d16
commit d07082277f
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/serial/cp210x.c
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@ -1543,10 +1543,16 @@ static int cp210x_gpio_init_valid_mask(struct gpio_chip *gc,
{ {
struct usb_serial *serial = gpiochip_get_data(gc); struct usb_serial *serial = gpiochip_get_data(gc);
struct cp210x_serial_private *priv = usb_get_serial_data(serial); struct cp210x_serial_private *priv = usb_get_serial_data(serial);
struct device *dev = &serial->interface->dev;
unsigned long altfunc_mask = priv->gpio_altfunc; unsigned long altfunc_mask = priv->gpio_altfunc;
bitmap_complement(valid_mask, &altfunc_mask, ngpios); bitmap_complement(valid_mask, &altfunc_mask, ngpios);
if (bitmap_empty(valid_mask, ngpios))
dev_dbg(dev, "no pin configured for GPIO\n");
else
dev_dbg(dev, "GPIO.%*pbl configured for GPIO\n", ngpios,
valid_mask);
return 0; return 0;
} }