[U-Boot] [PATCH v3 0/3] pmic:pfuze support buck regulator mode switch

Peng Fan

16 Jan 2015 16 Jan '15

4:25 p.m.

Hi, Przemyslaw

There is a return value comments that from Fabio, I correct it and send out v3 version. Others are same to the v1 version patch set. If this patch set is fine, please give you Acked-by. Sorry for the troubles.

This patch set is to support buck regulator can working in different switching modes. To improve system efficiency the buck regulators can operate in different switching modes.

patch 1/3 is to add related bit definitions and registers. patch 2/3 is to implement the switching mode init function. patch 3/3 is to add related mode init function in board code.

mx6slevk board is not included in this patch set, since power and i2c interface are not implemented for it. Future patch will cover this to add PAD setting, power_init_board and etc.

Peng Fan (3): pmic:pfuz100 add switch mode and more registers pmic:pfuze implement pmic_mode_init imx:mx6 set normal APS and standby PFM mode

board/freescale/common/pfuze.c | 36 ++++++++++++++++++ board/freescale/common/pfuze.h | 1 + board/freescale/mx6qsabreauto/mx6qsabreauto.c | 6 +++ board/freescale/mx6sabresd/mx6sabresd.c | 6 ++- board/freescale/mx6sxsabresd/mx6sxsabresd.c | 6 ++- include/power/pfuze100_pmic.h | 53 +++++++++++++++++++++++++++ 6 files changed, 106 insertions(+), 2 deletions(-)

-- 1.8.4

Show replies by date

Peng Fan

16 Jan 16 Jan

4:25 p.m.

New subject: [U-Boot] [PATCH v3 1/3] pmic:pfuz100 add switch mode and more registers

Add more pfuze register offset. And switch mode definition.

Signed-off-by: Peng Fan Peng.Fan@freescale.com ---

Changes v3: none

Changes v2: none

include/power/pfuze100_pmic.h | 53 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+)

diff --git a/include/power/pfuze100_pmic.h b/include/power/pfuze100_pmic.h index 1118489..7474afb 100644 --- a/include/power/pfuze100_pmic.h +++ b/include/power/pfuze100_pmic.h @@ -16,14 +16,34 @@ enum {

PFUZE100_SW1ABVOL = 0x20, PFUZE100_SW1ABSTBY = 0x21, + PFUZE100_SW1ABOFF = 0x22, + PFUZE100_SW1ABMODE = 0x23, PUZE_100_SW1ABCONF = 0x24, PFUZE100_SW1CVOL = 0x2e, PFUZE100_SW1CSTBY = 0x2f, + PFUZE100_SW1COFF = 0x30, + PFUZE100_SW1CMODE = 0x31, PFUZE100_SW1CCONF = 0x32, PFUZE100_SW2VOL = 0x35, + PFUZE100_SW2STBY = 0x36, + PFUZE100_SW2OFF = 0x37, + PFUZE100_SW2MODE = 0x38, + PFUZE100_SW2CONF = 0x39, PFUZE100_SW3AVOL = 0x3c, + PFUZE100_SW3ASTBY = 0x3D, + PFUZE100_SW3AOFF = 0x3E, + PFUZE100_SW3AMODE = 0x3F, + PFUZE100_SW3ACONF = 0x40, PFUZE100_SW3BVOL = 0x43, + PFUZE100_SW3BSTBY = 0x44, + PFUZE100_SW3BOFF = 0x45, + PFUZE100_SW3BMODE = 0x46, + PFUZE100_SW3BCONF = 0x47, PFUZE100_SW4VOL = 0x4a, + PFUZE100_SW4STBY = 0x4b, + PFUZE100_SW4OFF = 0x4c, + PFUZE100_SW4MODE = 0x4d, + PFUZE100_SW4CONF = 0x4e, PFUZE100_SWBSTCON1 = 0x66, PFUZE100_VREFDDRCON = 0x6a, PFUZE100_VSNVSVOL = 0x6b, @@ -177,5 +197,38 @@ enum { #define SWBST_MODE_AUTO (2 << 2) #define SWBST_MODE_APS (2 << 3)

+/* + * Regulator Mode Control + * + * OFF: The regulator is switched off and the output voltage is discharged. + * PFM: In this mode, the regulator is always in PFM mode, which is useful + * at light loads for optimized efficiency. + * PWM: In this mode, the regulator is always in PWM mode operation + * regardless of load conditions. + * APS: In this mode, the regulator moves automatically between pulse + * skipping mode and PWM mode depending on load conditions. + * + * SWxMODE[3:0] + * Normal Mode | Standby Mode | value + * OFF OFF 0x0 + * PWM OFF 0x1 + * PFM OFF 0x3 + * APS OFF 0x4 + * PWM PWM 0x5 + * PWM APS 0x6 + * APS APS 0x8 + * APS PFM 0xc + * PWM PFM 0xd + */ +#define OFF_OFF 0x0 +#define PWM_OFF 0x1 +#define PFM_OFF 0x3 +#define APS_OFF 0x4 +#define PWM_PWM 0x5 +#define PWM_APS 0x6 +#define APS_APS 0x8 +#define APS_PFM 0xc +#define PWM_PFM 0xd + int power_pfuze100_init(unsigned char bus); #endif

-- 1.8.4

Peng Fan

4:25 p.m.

New subject: [U-Boot] [PATCH v3 2/3] pmic:pfuze implement pmic_mode_init

This patch is to implement pmic_mode_init function, and add prototype in header file.

This function is to set switching mode for pmic buck regulators to improve system efficiency.

Mode: OFF: The regulator is switched off and the output voltage is discharged. PFM: In this mode, the regulator is always in PFM mode, which is useful at light loads for optimized efficiency. PWM: In this mode, the regulator is always in PWM mode operation regardless of load conditions. APS: In this mode, the regulator moves automatically between pulse skipping mode and PWM mode depending on load conditions.

Signed-off-by: Peng Fan Peng.Fan@freescale.com ---

Changes v3: delete the new feature, it is fine to use the original v1 patch version

Changes v2: implement new feature to configure one regulator

board/freescale/common/pfuze.c | 36 ++++++++++++++++++++++++++++++++++++ board/freescale/common/pfuze.h | 1 + 2 files changed, 37 insertions(+)

diff --git a/board/freescale/common/pfuze.c b/board/freescale/common/pfuze.c index 2cd1794..74df69c 100644 --- a/board/freescale/common/pfuze.c +++ b/board/freescale/common/pfuze.c @@ -8,6 +8,42 @@ #include <power/pmic.h> #include <power/pfuze100_pmic.h>

+int pfuze_mode_init(struct pmic *p, u32 mode) +{ + unsigned char offset, i, switch_num; + u32 id, ret; + + pmic_reg_read(p, PFUZE100_DEVICEID, &id); + id = id & 0xf; + + if (id == 0) { + switch_num = 6; + offset = PFUZE100_SW1CMODE; + } else if (id == 1) { + switch_num = 4; + offset = PFUZE100_SW2MODE; + } else { + printf("Not supported, id=%d\n", id); + return -1; + } + + ret = pmic_reg_write(p, PFUZE100_SW1ABMODE, mode); + if (ret < 0) { + printf("Set SW1AB mode error!\n"); + return ret; + } + + for (i = 0; i < switch_num - 1; i++) { + ret = pmic_reg_write(p, offset + i * 7, mode); + if (ret < 0) { + printf("Set switch%x mode error!\n", offset + i * 7); + return ret; + } + } + + return ret; +} + struct pmic *pfuze_common_init(unsigned char i2cbus) { struct pmic *p; diff --git a/board/freescale/common/pfuze.h b/board/freescale/common/pfuze.h index 7a4126c..53cfc99 100644 --- a/board/freescale/common/pfuze.h +++ b/board/freescale/common/pfuze.h @@ -8,5 +8,6 @@ #define __PFUZE_BOARD_HELPER__

struct pmic *pfuze_common_init(unsigned char i2cbus); +int pfuze_mode_init(struct pmic *p, u32 mode);

#endif

-- 1.8.4

Fabio Estevam

4:34 p.m.

New subject: [U-Boot] [PATCH v3 2/3] pmic:pfuze implement pmic_mode_init

On Fri, Jan 16, 2015 at 1:25 PM, Peng Fan Peng.Fan@freescale.com wrote:

...

+int pfuze_mode_init(struct pmic *p, u32 mode) +{

```
  unsigned char offset, i, switch_num;
```
```
  u32 id, ret;
```

  pmic_reg_read(p, PFUZE100_DEVICEID, &id);

```
  id = id & 0xf;
```
```
  if (id == 0) {
```
```
          switch_num = 6;
```
```
          offset = PFUZE100_SW1CMODE;
```
```
  } else if (id == 1) {
```
```
          switch_num = 4;
```
```
          offset = PFUZE100_SW2MODE;
```
```
  } else {
```

          printf("Not supported, id=%d\n", id);

```
          return -1;
```

return -EINVAL would be better.

Peng Fan

4:25 p.m.

New subject: [U-Boot] [PATCH v3 3/3] imx:mx6 set normal APS and standby PFM mode

To normal mode, use APS switching mode. To standy mode, use PFM switching mode.

Signed-off-by: Peng Fan Peng.Fan@freescale.com ---

Changes v3: Following Fabio's comments, correct return value

Changes v2: none

board/freescale/mx6qsabreauto/mx6qsabreauto.c | 6 ++++++ board/freescale/mx6sabresd/mx6sabresd.c | 6 +++++- board/freescale/mx6sxsabresd/mx6sxsabresd.c | 6 +++++- 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/board/freescale/mx6qsabreauto/mx6qsabreauto.c b/board/freescale/mx6qsabreauto/mx6qsabreauto.c index 59387ff..b12e74e 100644 --- a/board/freescale/mx6qsabreauto/mx6qsabreauto.c +++ b/board/freescale/mx6qsabreauto/mx6qsabreauto.c @@ -29,6 +29,7 @@ #include <asm/arch/crm_regs.h> #include <pca953x.h> #include <power/pmic.h> +#include <power/pfuze100_pmic.h> #include "../common/pfuze.h"

DECLARE_GLOBAL_DATA_PTR; @@ -515,11 +516,16 @@ int board_spi_cs_gpio(unsigned bus, unsigned cs) int power_init_board(void) { struct pmic *p; + unsigned int ret;

p = pfuze_common_init(I2C_PMIC); if (!p) return -ENODEV;

+ ret = pfuze_mode_init(p, APS_PFM); + if (ret < 0) + return ret; + return 0; }

diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c index 2f7198d..bb2dd96 100644 --- a/board/freescale/mx6sabresd/mx6sabresd.c +++ b/board/freescale/mx6sabresd/mx6sabresd.c @@ -631,12 +631,16 @@ int board_init(void) int power_init_board(void) { struct pmic *p; - unsigned int reg; + unsigned int reg, ret;

p = pfuze_common_init(I2C_PMIC); if (!p) return -ENODEV;

+ ret = pfuze_mode_init(p, APS_PFM); + if (ret < 0) + return ret; + /* Increase VGEN3 from 2.5 to 2.8V */ pmic_reg_read(p, PFUZE100_VGEN3VOL, &reg); reg &= ~LDO_VOL_MASK; diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c index 5cc58ac..49e4658 100644 --- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c +++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c @@ -199,12 +199,16 @@ static struct i2c_pads_info i2c_pad_info1 = { int power_init_board(void) { struct pmic *p; - unsigned int reg; + unsigned int reg, ret;

p = pfuze_common_init(I2C_PMIC); if (!p) return -ENODEV;

+ ret = pfuze_mode_init(p, APS_PFM); + if (ret < 0) + return ret; + /* Enable power of VGEN5 3V3, needed for SD3 */ pmic_reg_read(p, PFUZE100_VGEN5VOL, &reg); reg &= ~LDO_VOL_MASK;

-- 1.8.4

3770

Age (days ago)

3770

Last active (days ago)

List overview

Download

4 comments

2 participants

tags (0)

participants (2)

Fabio Estevam
Peng Fan