ARM: shmobile: kzm9g: Support Real Time Clock
authorTetsuyuki Kobayashi <koba@kmckk.co.jp>
Wed, 20 Jun 2012 10:57:51 +0000 (12:57 +0200)
committerRafael J. Wysocki <rjw@sisk.pl>
Thu, 21 Jun 2012 10:02:56 +0000 (12:02 +0200)
commit080e0d1384a3fce16b7d5324dbfc47c136cc3573
treeb35bdb5729d407670b8edb87d189b57ffaa6f806
parentaccb90c8f3b5c22c9d2893c775e98abb4a0d6bd3
ARM: shmobile: kzm9g: Support Real Time Clock

KZM-A9-GT board has RTC device r2025d at I2C channel 0
with slave address 0x64.

This patch enables reading and writing hardware real time clock on
KZM-A9-GT board. Interrupt is not yet supported.

How to test this patch using user space command.

Read RTC
 # hwclock -r

Copy system clock to RTC
 # hwclock -w

Shutdown and power off the board, and wait a while, then power on again.
Check RTC still keeps correct date.

Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
Tested-by: Simon Horman <horms@verge.net.au>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
arch/arm/configs/kzm9g_defconfig
arch/arm/mach-shmobile/board-kzm9g.c