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| author |   Johan Hovold <johan@kernel.org> | 2021-04-09 17:52:16 +0200 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2021-04-12 11:58:42 +0200 |
| commit | d07082277f55cb395be00c813c62f3c956d1edb6 (patch) | |
| tree | 3189057a7eb7ae66ed1b8c6558e81227c794e441 /drivers/usb/serial/cp210x.c | |
| parent | USB: serial: cp210x: provide gpio valid mask (diff) | |
| download | linux-dev-d07082277f55cb395be00c813c62f3c956d1edb6.tar.xz linux-dev-d07082277f55cb395be00c813c62f3c956d1edb6.zip | |
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>
Diffstat (limited to 'drivers/usb/serial/cp210x.c')
| -rw-r--r-- | drivers/usb/serial/cp210x.c | 6 |
1 files changed, 6 insertions, 0 deletions
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; } |