leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

armv7/ls1021atwr: program the regulator for deep sleep

Browse Source 
Program the external regulator to switch off voltage in deep sleep.

Signed-off-by: Chenhui Zhao <chenhui.zhao@freescale.com>
Acked-by: Alison Wang <alison.wang@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
This commit is contained in:
chenhui zhao 2015-05-15 14:42:30 +08:00 committed by York Sun
parent 99e1bd4241
commit 933db81c04
1 changed files with 34 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
board/freescale/ls1021atwr/ls1021atwr.c
View File

@ -582,6 +582,37 @@ struct smmu_stream_id dev_stream_id[] = {
{ 0x18c, 0x0e, "DEBUG" },
};
#ifdef CONFIG_DEEP_SLEEP
/* program the regulator (MC34VR500) to support deep sleep */
void ls1twr_program_regulator(void)
{
unsigned int i2c_bus;
u8 i2c_device_id;
#define LS1TWR_I2C_BUS_MC34VR500 1
#define MC34VR500_ADDR 0x8
#define MC34VR500_DEVICEID 0x4
#define MC34VR500_DEVICEID_MASK 0x0f
i2c_bus = i2c_get_bus_num();
i2c_set_bus_num(LS1TWR_I2C_BUS_MC34VR500);
i2c_device_id = i2c_reg_read(MC34VR500_ADDR, 0x0) &
MC34VR500_DEVICEID_MASK;
if (i2c_device_id != MC34VR500_DEVICEID) {
printf("The regulator (MC34VR500) does not exist. The device does not support deep sleep.\n");
return;
}
i2c_reg_write(MC34VR500_ADDR, 0x31, 0x4);
i2c_reg_write(MC34VR500_ADDR, 0x4d, 0x4);
i2c_reg_write(MC34VR500_ADDR, 0x6d, 0x38);
i2c_reg_write(MC34VR500_ADDR, 0x6f, 0x37);
i2c_reg_write(MC34VR500_ADDR, 0x71, 0x30);
i2c_set_bus_num(i2c_bus);
}
#endif
int board_init(void)
{
#ifndef CONFIG_SYS_FSL_NO_SERDES
@ -604,6 +635,9 @@ int board_init(void)
u_qe_init();
#endif
#ifdef CONFIG_DEEP_SLEEP
ls1twr_program_regulator();
#endif
return 0;
}