From d07082277f55cb395be00c813c62f3c956d1edb6 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Fri, 9 Apr 2021 17:52:16 +0200 Subject: [PATCH] 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 Signed-off-by: Johan Hovold --- drivers/usb/serial/cp210x.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c index ceb3a656a075..ee595d1bea0a 100644 --- a/drivers/usb/serial/cp210x.c +++ b/drivers/usb/serial/cp210x.c @@ -1543,10 +1543,16 @@ static int cp210x_gpio_init_valid_mask(struct gpio_chip *gc, { struct usb_serial *serial = gpiochip_get_data(gc); struct cp210x_serial_private *priv = usb_get_serial_data(serial); + struct device *dev = &serial->interface->dev; unsigned long altfunc_mask = priv->gpio_altfunc; 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; } -- 2.11.0