RTC: LPC32xx: Introduce RTC driver for the LPC32xx (v3)

From: wellsk40
Date: Thu Aug 12 2010 - 17:57:40 EST


This patch set adds support for the LPC32xx built-in RTC. This is
a persistent RTC with alarm on it's own power domain and a
dedicated oscillator. UIE emulation is used for *_UIE_* ioctls.

The patch can be pulled from:
git://git.lpclinux.com/linux-2.6-lpc rtc-lpc32xx_v3

v3 includes updates from the initial review of the RTC driver
and updates from v2. ...Fingers crossed...

Changes since v2:
RTC register macros now prefixed with LPC32XX_
Changed alarm_enable type to unsigned char to match
the type in the struct rtc_wkalrm (enable)
Set pending flag to correct state in read-alarm
function
Change the alarm read failure message to a warning
Regardless of the state of the alarm enable flag
passed into set_alarm, the alarm fire value
is updated. Previously, this was only updated
when the alarm enable flag was set
Added braces for else clauses with a single statement
if the previous if clause had them
Cleared platform data pointer in rtc structure on
error and remove

Changes since v1:
Fixed spaces/tabbing in lpc32xx entry in Kconfig/Makefile
Remove improper enable for rtc->alarm_enabled
Removed typecast on rtc structure in irq handler
Switch to resource managed (devm_) variants of kzalloc
and other functions in probe. Updated remove
based on these changes.
Disabled alarm on probe instead of keeping current register
settings. No changes for suspend.
Allowed driver to continue operation without wakeup or
alarm irq if the rtc irq request failed.
Relocated module_init and _exit macros to just after it's
associated function
Passed a NULL pointer to .driver.pm in platform driver
structure instead of a list of NULL functions.
Added MODULE_ALIAS

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