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pmic:pfuze implement pmic_mode_init

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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>
This commit is contained in:
Peng Fan 2015-01-27 10:14:03 +08:00 • committed by Stefano Babic
parent aee0013e53
commit 7428f55c94
2 changed files with 39 additions and 0 deletions
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38
board/freescale/common/pfuze.c
View file

@ -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;

1
board/freescale/common/pfuze.h
View file

@ -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