diff options
Diffstat (limited to 'drivers/usb/serial/cp210x.c')
-rw-r--r-- | drivers/usb/serial/cp210x.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c index a373cd63b3a4..ee595d1bea0a 100644 --- a/drivers/usb/serial/cp210x.c +++ b/drivers/usb/serial/cp210x.c @@ -1410,17 +1410,6 @@ static void cp210x_break_ctl(struct tty_struct *tty, int break_state) } #ifdef CONFIG_GPIOLIB -static int cp210x_gpio_request(struct gpio_chip *gc, unsigned int offset) -{ - struct usb_serial *serial = gpiochip_get_data(gc); - struct cp210x_serial_private *priv = usb_get_serial_data(serial); - - if (priv->gpio_altfunc & BIT(offset)) - return -ENODEV; - - return 0; -} - static int cp210x_gpio_get(struct gpio_chip *gc, unsigned int gpio) { struct usb_serial *serial = gpiochip_get_data(gc); @@ -1549,6 +1538,24 @@ static int cp210x_gpio_set_config(struct gpio_chip *gc, unsigned int gpio, return -ENOTSUPP; } +static int cp210x_gpio_init_valid_mask(struct gpio_chip *gc, + unsigned long *valid_mask, unsigned int ngpios) +{ + 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; +} + /* * This function is for configuring GPIO using shared pins, where other signals * are made unavailable by configuring the use of GPIO. This is believed to be @@ -1786,13 +1793,13 @@ static int cp210x_gpio_init(struct usb_serial *serial) return result; priv->gc.label = "cp210x"; - priv->gc.request = cp210x_gpio_request; priv->gc.get_direction = cp210x_gpio_direction_get; priv->gc.direction_input = cp210x_gpio_direction_input; priv->gc.direction_output = cp210x_gpio_direction_output; priv->gc.get = cp210x_gpio_get; priv->gc.set = cp210x_gpio_set; priv->gc.set_config = cp210x_gpio_set_config; + priv->gc.init_valid_mask = cp210x_gpio_init_valid_mask; priv->gc.owner = THIS_MODULE; priv->gc.parent = &serial->interface->dev; priv->gc.base = -1; |