forked from luck/tmp_suning_uos_patched
192cc7f090
With the conversion of MIPS to RTC_LIB the old RTC driver CONFIG_RTC became unselectable. Fix by setting up a platform device. Also enable RTC_CLASS so system time gets set from RTC on kernel initialization. [Ralf: Original patch by Tiejun; polished nice and shiny by me] Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
/*
|
|
* 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) 2007 MIPS Technologies, Inc.
|
|
* written by Ralf Baechle (ralf@linux-mips.org)
|
|
*
|
|
* Copyright (C) 2008 Wind River Systems, Inc.
|
|
* updated by Tiejun Chen <tiejun.chen@windriver.com>
|
|
*
|
|
* 1. Probe driver for the Malta's UART ports:
|
|
*
|
|
* o 2 ports in the SMC SuperIO
|
|
* o 1 port in the CBUS UART, a discrete 16550 which normally is only used
|
|
* for bringups.
|
|
*
|
|
* We don't use 8250_platform.c on Malta as it would result in the CBUS
|
|
* UART becoming ttyS0.
|
|
*
|
|
* 2. Register RTC-CMOS platform device on Malta.
|
|
*/
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/serial_8250.h>
|
|
#include <linux/mc146818rtc.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#define SMC_PORT(base, int) \
|
|
{ \
|
|
.iobase = base, \
|
|
.irq = int, \
|
|
.uartclk = 1843200, \
|
|
.iotype = UPIO_PORT, \
|
|
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, \
|
|
.regshift = 0, \
|
|
}
|
|
|
|
#define CBUS_UART_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_IOREMAP)
|
|
|
|
static struct plat_serial8250_port uart8250_data[] = {
|
|
SMC_PORT(0x3F8, 4),
|
|
SMC_PORT(0x2F8, 3),
|
|
{
|
|
.mapbase = 0x1f000900, /* The CBUS UART */
|
|
.irq = MIPS_CPU_IRQ_BASE + 2,
|
|
.uartclk = 3686400, /* Twice the usual clk! */
|
|
.iotype = UPIO_MEM32,
|
|
.flags = CBUS_UART_FLAGS,
|
|
.regshift = 3,
|
|
},
|
|
{ },
|
|
};
|
|
|
|
static struct platform_device malta_uart8250_device = {
|
|
.name = "serial8250",
|
|
.id = PLAT8250_DEV_PLATFORM2,
|
|
.dev = {
|
|
.platform_data = uart8250_data,
|
|
},
|
|
};
|
|
|
|
struct resource malta_rtc_resources[] = {
|
|
{
|
|
.start = RTC_PORT(0),
|
|
.end = RTC_PORT(7),
|
|
.flags = IORESOURCE_IO,
|
|
}, {
|
|
.start = RTC_IRQ,
|
|
.end = RTC_IRQ,
|
|
.flags = IORESOURCE_IRQ,
|
|
}
|
|
};
|
|
|
|
static struct platform_device malta_rtc_device = {
|
|
.name = "rtc_cmos",
|
|
.id = -1,
|
|
.resource = malta_rtc_resources,
|
|
.num_resources = ARRAY_SIZE(malta_rtc_resources),
|
|
};
|
|
|
|
static struct platform_device *malta_devices[] __initdata = {
|
|
&malta_uart8250_device,
|
|
&malta_rtc_device,
|
|
};
|
|
|
|
static int __init malta_add_devices(void)
|
|
{
|
|
int err;
|
|
|
|
err = platform_add_devices(malta_devices, ARRAY_SIZE(malta_devices));
|
|
if (err)
|
|
return err;
|
|
|
|
/*
|
|
* Set RTC to BCD mode to support current alarm code.
|
|
*/
|
|
CMOS_WRITE(CMOS_READ(RTC_CONTROL) & ~RTC_DM_BINARY, RTC_CONTROL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
device_initcall(malta_add_devices);
|