x86, olpc: Add XO-1 RTC driver (cfee9597) · Commits · 戴 / test

Documentation/devicetree/bindings/rtc/olpc-xo1-rtc.txt

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		OLPC XO-1 RTC
		~~~~~~~~~~~~~

		Required properties:
		- compatible : "olpc,xo1-rtc"

arch/x86/Kconfig

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		@@ -2080,6 +2080,13 @@ config OLPC_XO1_PM
		---help---
		Add support for poweroff and suspend of the OLPC XO-1 laptop.

		config OLPC_XO1_RTC
		bool "OLPC XO-1 Real Time Clock"
		depends on OLPC_XO1_PM && RTC_DRV_CMOS
		---help---
		Add support for the XO-1 real time clock, which can be used as a
		programmable wakeup source.

		config OLPC_XO1_SCI
		bool "OLPC XO-1 SCI extras"
		depends on OLPC && OLPC_XO1_PM && POWER_SUPPLY

arch/x86/platform/olpc/Makefile

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		obj-$(CONFIG_OLPC) += olpc.o olpc_ofw.o olpc_dt.o
		obj-$(CONFIG_OLPC_XO1_PM) += olpc-xo1-pm.o xo1-wakeup.o
		obj-$(CONFIG_OLPC_XO1_RTC) += olpc-xo1-rtc.o
		obj-$(CONFIG_OLPC_XO1_SCI) += olpc-xo1-sci.o

arch/x86/platform/olpc/olpc-xo1-rtc.c

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		/*
		* Support for OLPC XO-1 Real Time Clock (RTC)
		*
		* Copyright (C) 2011 One Laptop per Child
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*/

		#include <linux/mc146818rtc.h>
		#include <linux/platform_device.h>
		#include <linux/rtc.h>
		#include <linux/of.h>

		#include <asm/msr.h>
		#include <asm/olpc.h>

		static void rtc_wake_on(struct device *dev)
		{
		olpc_xo1_pm_wakeup_set(CS5536_PM_RTC);
		}

		static void rtc_wake_off(struct device *dev)
		{
		olpc_xo1_pm_wakeup_clear(CS5536_PM_RTC);
		}

		static struct resource rtc_platform_resource[] = {
		[0] = {
		.start = RTC_PORT(0),
		.end = RTC_PORT(1),
		.flags = IORESOURCE_IO,
		},
		[1] = {
		.start = RTC_IRQ,
		.end = RTC_IRQ,
		.flags = IORESOURCE_IRQ,
		}
		};

		static struct cmos_rtc_board_info rtc_info = {
		.rtc_day_alarm = 0,
		.rtc_mon_alarm = 0,
		.rtc_century = 0,
		.wake_on = rtc_wake_on,
		.wake_off = rtc_wake_off,
		};

		static struct platform_device xo1_rtc_device = {
		.name = "rtc_cmos",
		.id = -1,
		.num_resources = ARRAY_SIZE(rtc_platform_resource),
		.dev.platform_data = &rtc_info,
		.resource = rtc_platform_resource,
		};

		static int __init xo1_rtc_init(void)
		{
		int r;
		struct device_node *node;

		node = of_find_compatible_node(NULL, NULL, "olpc,xo1-rtc");
		if (!node)
		return 0;
		of_node_put(node);

		pr_info("olpc-xo1-rtc: Initializing OLPC XO-1 RTC\n");
		rdmsrl(MSR_RTC_DOMA_OFFSET, rtc_info.rtc_day_alarm);
		rdmsrl(MSR_RTC_MONA_OFFSET, rtc_info.rtc_mon_alarm);
		rdmsrl(MSR_RTC_CEN_OFFSET, rtc_info.rtc_century);

		r = platform_device_register(&xo1_rtc_device);
		if (r)
		return r;

		device_init_wakeup(&xo1_rtc_device.dev, 1);
		return 0;
		}
		arch_initcall(xo1_rtc_init);

include/linux/cs5535.h

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		@@ -40,6 +40,10 @@
		#define MSR_MFGPT_NR 0x51400029
		#define MSR_MFGPT_SETUP 0x5140002B

		#define MSR_RTC_DOMA_OFFSET 0x51400055
		#define MSR_RTC_MONA_OFFSET 0x51400056
		#define MSR_RTC_CEN_OFFSET 0x51400057

		#define MSR_LX_SPARE_MSR 0x80000011 /* DC-specific */

		#define MSR_GX_GLD_MSR_CONFIG 0xC0002001
		@@ -95,6 +99,7 @@ static inline int cs5535_pic_unreqz_select_high(unsigned int group,

		/* CS5536_PM1_EN bits */
		#define CS5536_PM_PWRBTN (1 << 8)
		#define CS5536_PM_RTC (1 << 10)

		/* CS5536_PM_GPE0_STS bits */
		#define CS5536_GPIOM7_PME_FLAG (1 << 31)

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