Commit 933db81c authored by chenhui zhao's avatar chenhui zhao Committed by York Sun

armv7/ls1021atwr: program the regulator for deep sleep

Program the external regulator to switch off voltage in deep sleep.
Signed-off-by: default avatarChenhui Zhao <chenhui.zhao@freescale.com>
Acked-by: default avatarAlison Wang <alison.wang@freescale.com>
Reviewed-by: default avatarYork Sun <yorksun@freescale.com>
parent 99e1bd42
......@@ -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;
}
......
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