USB: serial: ftdi_sio: report the valid GPIO lines to gpiolib (11fb08cf) · Commits · 戴 / test

Since it is pretty common for only some of the CBUS lines to be valid as GPIO lines, let's report such validity to the rest of the kernel. Signed-off-by:

Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20201204164739.781812-3-maz@kernel.org Reviewed-by:

Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by:

Linus Walleij <linus.walleij@linaro.org> Signed-off-by:

Johan Hovold <johan@kernel.org>

drivers/usb/serial/ftdi_sio.c

+14 −0

Original line number	Diff line number	Diff line
		@@ -2002,6 +2002,19 @@ static int ftdi_gpio_direction_output(struct gpio_chip *gc, unsigned int gpio,
		return result;
		}

		static int ftdi_gpio_init_valid_mask(struct gpio_chip *gc,
		unsigned long *valid_mask,
		unsigned int ngpios)
		{
		struct usb_serial_port *port = gpiochip_get_data(gc);
		struct ftdi_private *priv = usb_get_serial_port_data(port);
		unsigned long map = priv->gpio_altfunc;

		bitmap_complement(valid_mask, &map, ngpios);

		return 0;
		}

		static int ftdi_read_eeprom(struct usb_serial serial, void dst, u16 addr,
		u16 nbytes)
		{
		@@ -2173,6 +2186,7 @@ static int ftdi_gpio_init(struct usb_serial_port *port)
		priv->gc.get_direction = ftdi_gpio_direction_get;
		priv->gc.direction_input = ftdi_gpio_direction_input;
		priv->gc.direction_output = ftdi_gpio_direction_output;
		priv->gc.init_valid_mask = ftdi_gpio_init_valid_mask;
		priv->gc.get = ftdi_gpio_get;
		priv->gc.set = ftdi_gpio_set;
		priv->gc.get_multiple = ftdi_gpio_get_multiple;

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