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| author | Peng Fan <Peng.Fan@freescale.com> | 2015-01-27 10:14:03 +0800 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2015-02-11 12:27:46 +0100 |
| commit | 7428f55c94ac51214038a3882630ddb89520e42e (patch) | |
| tree | f07efd7471971a030a3ab54026693d5100b3ce18 /board | |
| parent | aee0013e53b339a573e2a8d66062fe87765aa3bd (diff) | |
| download | u-boot-imx-7428f55c94ac51214038a3882630ddb89520e42e.zip u-boot-imx-7428f55c94ac51214038a3882630ddb89520e42e.tar.gz u-boot-imx-7428f55c94ac51214038a3882630ddb89520e42e.tar.bz2 | |
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>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
Diffstat (limited to 'board')
| -rw-r--r-- | board/freescale/common/pfuze.c | 38 | ||||
| -rw-r--r-- | board/freescale/common/pfuze.h | 1 |
2 files changed, 39 insertions, 0 deletions
diff --git a/board/freescale/common/pfuze.c b/board/freescale/common/pfuze.c index 2cd1794..4980bf7 100644 --- a/board/freescale/common/pfuze.c +++ b/board/freescale/common/pfuze.c @@ -5,9 +5,47 @@ */ #include <common.h> +#include <errno.h> #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 -EINVAL; + } + + 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 * SWITCH_SIZE, mode); + if (ret < 0) { + printf("Set switch 0x%x mode error!\n", + offset + i * SWITCH_SIZE); + 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 |