xref: /kernel/linux/linux-6.6/arch/mips/bcm63xx/dev-uart.c (revision 62306a36)

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
 */

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <bcm63xx_cpu.h>

static struct resource uart0_resources[] = {
	{
		/* start & end filled at runtime */
		.flags		= IORESOURCE_MEM,
	},
	{
		/* start filled at runtime */
		.flags		= IORESOURCE_IRQ,
	},
};

static struct resource uart1_resources[] = {
	{
		/* start & end filled at runtime */
		.flags		= IORESOURCE_MEM,
	},
	{
		/* start filled at runtime */
		.flags		= IORESOURCE_IRQ,
	},
};

static struct platform_device bcm63xx_uart_devices[] = {
	{
		.name		= "bcm63xx_uart",
		.id		= 0,
		.num_resources	= ARRAY_SIZE(uart0_resources),
		.resource	= uart0_resources,
	},

	{
		.name		= "bcm63xx_uart",
		.id		= 1,
		.num_resources	= ARRAY_SIZE(uart1_resources),
		.resource	= uart1_resources,
	}
};

int __init bcm63xx_uart_register(unsigned int id)
{
	if (id >= ARRAY_SIZE(bcm63xx_uart_devices))
		return -ENODEV;

	if (id == 1 && (!BCMCPU_IS_3368() && !BCMCPU_IS_6358() &&
		!BCMCPU_IS_6368()))
		return -ENODEV;

	if (id == 0) {
		uart0_resources[0].start = bcm63xx_regset_address(RSET_UART0);
		uart0_resources[0].end = uart0_resources[0].start +
			RSET_UART_SIZE - 1;
		uart0_resources[1].start = bcm63xx_get_irq_number(IRQ_UART0);
	}

	if (id == 1) {
		uart1_resources[0].start = bcm63xx_regset_address(RSET_UART1);
		uart1_resources[0].end = uart1_resources[0].start +
			RSET_UART_SIZE - 1;
		uart1_resources[1].start = bcm63xx_get_irq_number(IRQ_UART1);
	}

	return platform_device_register(&bcm63xx_uart_devices[id]);
}