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ARM: shmobile: kzm9g: Support Real Time Clock

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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>
This commit is contained in:
Tetsuyuki Kobayashi 2012-06-20 12:57:51 +02:00 • committed by Rafael J. Wysocki
parent accb90c8f3
commit 080e0d1384
2 changed files with 4 additions and 0 deletions
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1
arch/arm/configs/kzm9g_defconfig
View file

@ -108,6 +108,7 @@ CONFIG_MMC_SH_MMCIF=y
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_DRV_RS5C372=y
CONFIG_DMADEVICES=y
CONFIG_SH_DMAE=y
CONFIG_ASYNC_TX_DMA=y

3
arch/arm/mach-shmobile/board-kzm9g.c
View file

@ -338,6 +338,9 @@ static struct pcf857x_platform_data pcf8575_pdata = {
static struct i2c_board_info i2c0_devices[] = {
{
I2C_BOARD_INFO("ak4648", 0x12),
},
{
I2C_BOARD_INFO("r2025sd", 0x32),
}
};