This patch is to implement pfuze_mode_init and pfuze_regulator_mode_set
function, and add prototype in header file.
pfuze_mode_init is to set switching mode for all buck regulators to
improve system efficiency.
pfuze_regulator_mode_set is to set the regulator's mode according input
parameter.
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 <[email protected]>
---
Changes v2:
implement one function mode for one regulator.
board/freescale/common/pfuze.c | 43 ++++++++++++++++++++++++++++++++++++++++++
board/freescale/common/pfuze.h | 2 ++
2 files changed, 45 insertions(+)
diff --git a/board/freescale/common/pfuze.c b/board/freescale/common/pfuze.c
index 2cd1794..f2fffc1 100644
--- a/board/freescale/common/pfuze.c
+++ b/board/freescale/common/pfuze.c
@@ -8,6 +8,49 @@
#include <power/pmic.h>
#include <power/pfuze100_pmic.h>
+/* Set one switch regulator's mode */
+int pfuze_regulator_mode_set(struct pmic *p, u32 regulator, u32 mode)
+{
+ return pmic_reg_write(p, regulator, mode);
+}
+
+/* Set all switch regulators' working mode */
+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 = pfuze_regulator_mode_set(p, PFUZE100_SW1ABMODE, mode);
+ if (ret < 0) {
+ printf("Set SW1AB mode error!\n");
+ return ret;
+ }
+
+ for (i = 0; i < switch_num - 1; i++) {
+ ret = pfuze_regulator_mode_set(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..7c316c6 100644
--- a/board/freescale/common/pfuze.h
+++ b/board/freescale/common/pfuze.h
@@ -8,5 +8,7 @@
#define __PFUZE_BOARD_HELPER__
struct pmic *pfuze_common_init(unsigned char i2cbus);
+int pfuze_mode_init(struct pmic *p, u32 mode);
+int pfuze_regulator_mode_set(struct pmic *p, u32 regulator, u32 mode);
#endif
--
1.8.4
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