| Message ID | 1431672150-4027-1-git-send-email-chenhui.zhao@freescale.com |
|---|---|
| State | Accepted |
| Delegated to: | York Sun |
| Headers | show |
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-for-deep-sleep-tp214798p219807.html Sent from the U-Boot mailing list archive at Nabble.com.
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.zhao@freescale.com> > --- Applied to u-boot-fsl-qoriq master. Thanks. York
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; }
Program the external regulator to switch off voltage in deep sleep. Signed-off-by: Chenhui Zhao <chenhui.zhao@freescale.com> --- board/freescale/ls1021atwr/ls1021atwr.c | 34 +++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+)