From 192cc7f0900a088e464635a59a63d974ee7a3e97 Mon Sep 17 00:00:00 2001 From: Tiejun Chen Date: Tue, 25 Nov 2008 16:33:20 +0800 Subject: MIPS: Malta: Add back RTC support 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 Signed-off-by: Ralf Baechle --- arch/mips/mti-malta/malta-platform.c | 56 ++++++++++++++++++++++++++++++------ 1 file changed, 47 insertions(+), 9 deletions(-) (limited to 'arch/mips/mti-malta') diff --git a/arch/mips/mti-malta/malta-platform.c b/arch/mips/mti-malta/malta-platform.c index 83b9bab..6a476f7 100644 --- a/arch/mips/mti-malta/malta-platform.c +++ b/arch/mips/mti-malta/malta-platform.c @@ -6,7 +6,10 @@ * Copyright (C) 2007 MIPS Technologies, Inc. * written by Ralf Baechle (ralf@linux-mips.org) * - * Probe driver for the Malta's UART ports: + * Copyright (C) 2008 Wind River Systems, Inc. + * updated by Tiejun Chen + * + * 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 @@ -14,10 +17,14 @@ * * 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 #include #include +#include +#include #define SMC_PORT(base, int) \ { \ @@ -45,7 +52,7 @@ static struct plat_serial8250_port uart8250_data[] = { { }, }; -static struct platform_device uart8250_device = { +static struct platform_device malta_uart8250_device = { .name = "serial8250", .id = PLAT8250_DEV_PLATFORM2, .dev = { @@ -53,13 +60,44 @@ static struct platform_device uart8250_device = { }, }; -static int __init uart8250_init(void) +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) { - return platform_device_register(&uart8250_device); -} + int err; -module_init(uart8250_init); + 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; +} -MODULE_AUTHOR("Ralf Baechle "); -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("8250 UART probe driver for the Malta CBUS UART"); +device_initcall(malta_add_devices); -- cgit v1.1