Re: [U-Boot] [PATCH] arm: ls1021atwr: program the regulator for deep sleep

[York Sun]

On 05/14/2015 11:42 PM, Chenhui Zhao wrote:
 Program the external regulator to switch off voltage in deep sleep.
 
 Signed-off-by: Chenhui Zhao chenhui.z...@freescale.com
 ---

Applied to u-boot-fsl-qoriq master. Thanks.

York
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Re: [U-Boot] [PATCH] arm: ls1021atwr: program the regulator for deep sleep

[Alison Wang]

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


Zhao Chenhui-3 wrote
 Program the external regulator to switch off voltage in deep sleep.
 
 Signed-off-by: Chenhui Zhao lt;

 chenhui.zhao@

 gt;
 ---
  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
 
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[U-Boot] [PATCH] arm: ls1021atwr: program the regulator for deep sleep

[Chenhui Zhao]

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

Signed-off-by: Chenhui Zhao chenhui.z...@freescale.com
---
 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_MASK0x0f
+
+   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

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