22258fa40e
This patch extends the Ebony and Walnut platform code to instantiate the existing ds1742 RTC class driver for the DS1743 RTC/NVRAM chip found on both those boards. The patch uses a helper function to scan the device tree and instantiate the appropriate platform_device based on it, so it should be easy to extend for other boards which have mmio mapped RTC chips. Along with this, the device tree binding for the ds1743 chips is tweaked, based on the existing DS1385 OF binding found at: http://playground.sun.com/1275/proposals/Closed/Remanded/Accepted/346-it.txt Although that document covers the NVRAM portion of the chip, whereas here we're interested in the RTC portion, so it's not entirely clear if that's a good model. This implements only RTC class driver support - that is /dev/rtc0, not /dev/rtc, and the low-level get/set time callbacks remain unimplemented. That means in order to get at the clock you will either need a modified version of hwclock which will look at /dev/rtc0, or you'll need to configure udev to symlink rtc0 to rtc. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
#ifndef _ASM_POWERPC_OF_PLATFORM_H
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#define _ASM_POWERPC_OF_PLATFORM_H
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/*
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* Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
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* <benh@kernel.crashing.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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*/
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/* This is just here during the transition */
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#include <linux/of_platform.h>
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/* Platform drivers register/unregister */
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static inline int of_register_platform_driver(struct of_platform_driver *drv)
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{
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return of_register_driver(drv, &of_platform_bus_type);
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}
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static inline void of_unregister_platform_driver(struct of_platform_driver *drv)
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{
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of_unregister_driver(drv);
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}
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/* Platform devices and busses creation */
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extern struct of_device *of_platform_device_create(struct device_node *np,
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const char *bus_id,
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struct device *parent);
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/* pseudo "matches" value to not do deep probe */
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#define OF_NO_DEEP_PROBE ((struct of_device_id *)-1)
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extern int of_platform_bus_probe(struct device_node *root,
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const struct of_device_id *matches,
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struct device *parent);
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extern struct of_device *of_find_device_by_phandle(phandle ph);
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extern void of_instantiate_rtc(void);
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#endif /* _ASM_POWERPC_OF_PLATFORM_H */
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