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Commit 0d963ebf authored by Jan Kiszka's avatar Jan Kiszka
Browse files

serial: exar: Factor out platform hooks 



This prepares the addition of IOT2040 platform support by preparing the
needed setup and rs485_config hooks.

Signed-off-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4076cf08

drivers/tty/serial/8250/8250_exar.c

+27 −5
Original line number Diff line number Diff line
@@ -63,6 +63,11 @@ 


struct exar8250;



struct exar8250_platform {

	int (*rs485_config)(struct uart_port *, struct serial_rs485 *);

	int (*register_gpio)(struct pci_dev *, struct uart_8250_port *);

};



/**

 * struct exar8250_board - board information

 * @num_ports: number of serial ports
@@ -189,7 +194,7 @@ static void setup_gpio(u8 __iomem *p) 
}



static void *

xr17v35x_register_gpio(struct pci_dev *pcidev)

__xr17v35x_register_gpio(struct pci_dev *pcidev)

{

	struct platform_device *pdev;
@@ -208,17 +213,36 @@ xr17v35x_register_gpio(struct pci_dev *pcidev) 
	return pdev;

}



static int xr17v35x_register_gpio(struct pci_dev *pcidev,

				  struct uart_8250_port *port)

{

	if (pcidev->vendor == PCI_VENDOR_ID_EXAR)

		port->port.private_data =

			__xr17v35x_register_gpio(pcidev);



	return 0;

}



static const struct exar8250_platform exar8250_default_platform = {

	.register_gpio = xr17v35x_register_gpio,

};



static int

pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev,

		   struct uart_8250_port *port, int idx)

{

	const struct exar8250_board *board = priv->board;

	const struct exar8250_platform *platform;

	unsigned int offset = idx * 0x400;

	unsigned int baud = 7812500;

	u8 __iomem *p;

	int ret;



	platform = &exar8250_default_platform;



	port->port.uartclk = baud * 16;

	port->port.rs485_config = platform->rs485_config;



	/*

	 * Setup the uart clock for the devices on expansion slot to

	 * half the clock speed of the main chip (which is 125MHz)
@@ -241,12 +265,10 @@ pci_xr17v35x_setup(struct exar8250 *priv, struct pci_dev *pcidev, 
		/* Setup Multipurpose Input/Output pins. */

		setup_gpio(p);



		if (pcidev->vendor == PCI_VENDOR_ID_EXAR)

			port->port.private_data =

				xr17v35x_register_gpio(pcidev);

		ret = platform->register_gpio(pcidev, port);

	}



	return 0;

	return ret;

}



static void pci_xr17v35x_exit(struct pci_dev *pcidev)