/* ------------------------------------------------------------------------*//**
* @FUNCTION smps_uvolt2vsel
* @BRIEF for a given rail, convert voltage in microvolts into
* SMPS vsel command.
* @RETURNS >= 0 SMPS vsel command corresponding to uv
* OMAPCONF_ERR_ARG
* OMAPCONF_ERR_NOT_AVAILABLE
* @param[in] smps_id: valid SMPS ID
* @param[in] uvolt: voltage to be converted (in microvolts)
* @DESCRIPTION for a given rail, convert voltage in microvolts into
* SMPS vsel command.
*//*------------------------------------------------------------------------ */
int smps_uvolt2vsel(pmic_smps_id smps_id, unsigned long uvolt)
{
int vsel;
CHECK_ARG_LESS_THAN(smps_id, PMIC_SMPS_ID_MAX, (int) OMAPCONF_ERR_ARG);
if (!pmic_detection_done())
pmic_detect();
switch (pmic_chip[smps_id]) {
case PMIC_TWL6030:
case PMIC_TWL6032:
case PMIC_TWL6034:
vsel = (int) twl603x_uv_to_vsel(smps_id2vdd_id(smps_id), uvolt);
break;
case PMIC_TWL6035:
vsel = (int) twl603x_uv_to_vsel((unsigned int) smps_id, uvolt);
break;
case PMIC_TPS62361:
vsel = (int) tps62361_uv_to_vsel(uvolt);
break;
case PMIC_TPS659038:
vsel = (int) tps659038_uv_to_vsel(uvolt);
break;
case PMIC_TPS65217A:
case PMIC_TPS65217B:
case PMIC_TPS65217C:
case PMIC_TPS65217D:
vsel = (int) tps65217x_uv_to_vsel(uvolt);
break;
default:
vsel = (int) OMAPCONF_ERR_NOT_AVAILABLE;
}
dprintf("%s(%s): uvolt=%lu vsel=%u (0x%08X)\n", __func__,
smps_name_get(smps_id), uvolt, vsel, vsel);
return vsel;
}
/* ------------------------------------------------------------------------*//**
* @FUNCTION tps659038_uvoltage_set
* @BRIEF set voltage of a given SMPS voltage rail.
* @RETURNS 0 in case of success
* OMAPCONF_ERR_CPU
* OMAPCONF_ERR_ARG
* OMAPCONF_ERR_NOT_AVAILABLE
* OMAPCONF_ERR_REG_ACCESS
* OMAPCONF_ERR_INTERNAL
* @param[in] vdd_id: voltage domain ID
* @param[in] uv: voltage to be set (in micro-volt)
* @DESCRIPTION set voltage of a given SMPS voltage rail, in micro-volt.
*//*------------------------------------------------------------------------ */
int tps659038_uvoltage_set(unsigned int vdd_id, unsigned long uv)
{
int ret;
unsigned int val;
unsigned char vsel;
const tps659038_smps_registers **vdd_smps_regs;
const tps659038_smps_registers *smps_regs;
CHECK_ARG_LESS_THAN(vdd_id, 5, OMAPCONF_ERR_ARG);
/* Retrive SMPS registers addresses */
vdd_smps_regs = tps659038_smps_vdd_dra7xx[vdd_id];
if (vdd_smps_regs == NULL)
return OMAPCONF_ERR_INTERNAL;
smps_regs = *vdd_smps_regs;
if (smps_regs == NULL)
return OMAPCONF_ERR_INTERNAL;
dprintf("%s(): vdd_id=%u ADDR: ctrl=0x%02X tstep=0x%02X force=0x%02X "
"voltage=0x%02X\n", __func__, vdd_id, smps_regs->ctrl,
smps_regs->tstep, smps_regs->force, smps_regs->voltage);
/* Check SMPS Status */
if (smps_regs->ctrl == -1) {
dprintf("%s(): SMPSxx_CTRL addr=-1!!!\n", __func__);
return OMAPCONF_ERR_INTERNAL;
}
ret = i2cget(TPS659038_I2C_BUS, TPS659038_ID0_ADDR,
smps_regs->ctrl, &val);
if (ret != 0)
return OMAPCONF_ERR_REG_ACCESS;
dprintf("%s(): SMPSxx_CTRL=0x%02X\n", __func__, val);
if (extract_bitfield(val, 4, 2) == 0) {
dprintf("(%s(): SMPS is OFF\n", __func__);
return OMAPCONF_ERR_NOT_AVAILABLE;
}
/* Make sure SMPSxx_CTRL.ROOF_FLOOR_EN=0 */
if (extract_bit(val, 6) == 1) {
dprintf("%s(): SMPS voltage controlled by resource pins, "
"clearing ROOF_FLOOR_EN bit.\n", __func__);
/* Clear ROOF_FLOOR_EN bit (6) */
val = val & 0xBF;
ret = i2cset(TPS659038_I2C_BUS, TPS659038_ID0_ADDR,
smps_regs->ctrl, (unsigned int) val);
if (ret != 0)
return OMAPCONF_ERR_REG_ACCESS;
dprintf("%s(): SMPS voltage now controlled by "
"SMPS12_FORCE.CMD bit.\n", __func__);
} else {
dprintf("%s(): SMPS voltage controlled by "
"SMPS12_FORCE.CMD bit.\n", __func__);
}
/* Convert voltage to VSEL */
vsel = tps659038_uv_to_vsel(uv);
dprintf("%s(): uv=%lu vsel=0x%02X\n", __func__, uv, vsel);
/* Write VSEL to SMPSxx_VOLTAGE */
ret = i2cset(TPS659038_I2C_BUS, TPS659038_ID0_ADDR,
smps_regs->voltage, (unsigned int) vsel);
if (ret != 0)
return OMAPCONF_ERR_REG_ACCESS;
/*
* Try to switch voltage control to SMPSxx_FORCE register (if exists)
* so that voltage will not be overriden by kernel during
* DVFS, AVS or power transition.
*/
if (smps_regs->force != -1) {
dprintf("%s(): SMPSxx_FORCE exists, switching control.\n",
__func__);
/* Clear bit 7 (CMD) */
val = vsel & 0x7F;
ret = i2cset(TPS659038_I2C_BUS, TPS659038_ID0_ADDR,
smps_regs->force, (unsigned int) val);
} else {
dprintf("%s(): SMPSxx_FORCE does not exist.\n", __func__);
ret = 0;
}
return ret;
}
