Acked-by: Alison Wang alison.wang@freescale.com

Zhao Chenhui-3 wrote

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

Signed-off-by: Chenhui Zhao <

chenhui.zhao@

>

board/freescale/ls1021atwr/ls1021atwr.c | 34 +++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)

diff --git a/board/freescale/ls1021atwr/ls1021atwr.c b/board/freescale/ls1021atwr/ls1021atwr.c index 2c8d6d1..37ec0ba 100644 --- a/board/freescale/ls1021atwr/ls1021atwr.c +++ b/board/freescale/ls1021atwr/ls1021atwr.c @@ -578,6 +578,37 @@ 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 @@ -600,6 +631,9 @@ int board_init(void) u_qe_init(); #endif

+#ifdef CONFIG_DEEP_SLEEP

• ls1twr_program_regulator();

+#endif return 0; }

-- 1.9.1

---

U-Boot mailing list

U-Boot@.denx

http://lists.denx.de/mailman/listinfo/u-boot

-- View this message in context: http://u-boot.10912.n7.nabble.com/PATCH-arm-ls1021atwr-program-the-regulator... Sent from the U-Boot mailing list archive at Nabble.com.