[PATCH] ppc32/serial: Change mpc52xx_uart.c to use the Low Density Serial port major

 * by the bootloader or in the platform init code.

 *

 * The idx field must be equal to the PSC index ( e.g. 0 for PSC1, 1 for PSC2,

 * and so on). So the PSC1 is mapped to /dev/ttyS0, PSC2 to /dev/ttyS1 and so

 * on. But be warned, it's an ABSOLUTE REQUIREMENT ! This is needed mainly for

 * the console code : without this 1:1 mapping, at early boot time, when we are

 * parsing the kernel args console=ttyS?, we wouldn't know wich PSC it will be

 * mapped to.

 * and so on). So the PSC1 is mapped to /dev/ttyPSC0, PSC2 to /dev/ttyPSC1 and

 * so on. But be warned, it's an ABSOLUTE REQUIREMENT ! This is needed mainly

 * fpr the console code : without this 1:1 mapping, at early boot time, when we

 * are parsing the kernel args console=ttyPSC?, we wouldn't know wich PSC it

 * will be mapped to.

 */

#include <linux/config.h>

#include <linux/serial_core.h>

/* We've been assigned a range on the "Low-density serial ports" major */

#define SERIAL_PSC_MAJOR	204

#define SERIAL_PSC_MINOR	148

#define ISR_PASS_LIMIT 256	/* Max number of iteration in the interrupt */

static struct uart_driver mpc52xx_uart_driver;

static struct console mpc52xx_console = {

	.name	= "ttyS",

	.name	= "ttyPSC",

	.write	= mpc52xx_console_write,

	.device	= uart_console_device,

	.setup	= mpc52xx_console_setup,

	.flags	= CON_PRINTBUFFER,

	.index	= -1,	/* Specified on the cmdline (e.g. console=ttyS0 ) */

	.index	= -1,	/* Specified on the cmdline (e.g. console=ttyPSC0 ) */

	.data	= &mpc52xx_uart_driver,

};

static struct uart_driver mpc52xx_uart_driver = {

	.owner		= THIS_MODULE,

	.driver_name	= "mpc52xx_psc_uart",

	.dev_name	= "ttyS",

	.devfs_name	= "ttyS",

	.major		= TTY_MAJOR,

	.minor		= 64,

	.dev_name	= "ttyPSC",

	.devfs_name	= "ttyPSC",

	.major		= SERIAL_PSC_MAJOR,

	.minor		= SERIAL_PSC_MINOR,

	.nr		= MPC52xx_PSC_MAXNUM,

	.cons		= MPC52xx_PSC_CONSOLE,

};