diff options
| -rw-r--r-- | drivers/regulator/cpr3-regulator.c | 146 | ||||
| -rw-r--r-- | drivers/regulator/cpr3-util.c | 26 |
2 files changed, 160 insertions, 12 deletions
diff --git a/drivers/regulator/cpr3-regulator.c b/drivers/regulator/cpr3-regulator.c index cd02debc37aa..23ac83eb30df 100644 --- a/drivers/regulator/cpr3-regulator.c +++ b/drivers/regulator/cpr3-regulator.c @@ -1264,6 +1264,8 @@ static void cprh_controller_program_sdelta( mb(); } +static int cprh_regulator_aging_adjust(struct cpr3_controller *ctrl); + /** * cpr3_regulator_init_cprh() - performs hardware initialization at the * controller and thread level required for CPRh operation. @@ -1290,6 +1292,16 @@ static int cpr3_regulator_init_cprh(struct cpr3_controller *ctrl) return -EINVAL; } + rc = cprh_regulator_aging_adjust(ctrl); + if (rc && rc != -ETIMEDOUT) { + /* + * Don't fail initialization if the CPR aging measurement + * timed out due to sensors not being available. + */ + cpr3_err(ctrl, "CPR aging adjustment failed, rc=%d\n", rc); + return rc; + } + cprh_controller_program_sdelta(ctrl); rc = cpr3_regulator_init_cprh_corners(&ctrl->thread[0].vreg[0]); @@ -3346,7 +3358,7 @@ static int cpr3_regulator_measure_aging(struct cpr3_controller *ctrl, u32 mask, reg, result, quot_min, quot_max, sel_min, sel_max; u32 quot_min_scaled, quot_max_scaled; u32 gcnt, gcnt_ref, gcnt0_restore, gcnt1_restore, irq_restore; - u32 cont_dly_restore, up_down_dly_restore = 0; + u32 ro_mask_restore, cont_dly_restore, up_down_dly_restore = 0; int quot_delta, quot_delta_scaled, quot_delta_scaled_sum; int *quot_delta_results; int rc, rc2, i, aging_measurement_count, filtered_count; @@ -3379,7 +3391,8 @@ static int cpr3_regulator_measure_aging(struct cpr3_controller *ctrl, /* Switch from HW to SW closed-loop if necessary */ if (ctrl->supports_hw_closed_loop) { - if (ctrl->ctrl_type == CPR_CTRL_TYPE_CPR4) { + if (ctrl->ctrl_type == CPR_CTRL_TYPE_CPR4 || + ctrl->ctrl_type == CPR_CTRL_TYPE_CPRH) { cpr3_masked_write(ctrl, CPR4_REG_MARGIN_ADJ_CTL, CPR4_MARGIN_ADJ_CTL_HW_CLOSED_LOOP_EN_MASK, CPR4_MARGIN_ADJ_CTL_HW_CLOSED_LOOP_DISABLE); @@ -3397,6 +3410,10 @@ static int cpr3_regulator_measure_aging(struct cpr3_controller *ctrl, cpr3_write(ctrl, CPR3_REG_GCNT(0), gcnt); cpr3_write(ctrl, CPR3_REG_GCNT(1), gcnt); + /* Unmask all RO's */ + ro_mask_restore = cpr3_read(ctrl, CPR3_REG_RO_MASK(0)); + cpr3_write(ctrl, CPR3_REG_RO_MASK(0), 0); + /* * Mask all sensors except for the one to measure and bypass all * sensors in collapsible domains. @@ -3535,6 +3552,8 @@ cleanup: cpr3_write(ctrl, CPR3_REG_IRQ_EN, irq_restore); + cpr3_write(ctrl, CPR3_REG_RO_MASK(0), ro_mask_restore); + cpr3_write(ctrl, CPR3_REG_GCNT(0), gcnt0_restore); cpr3_write(ctrl, CPR3_REG_GCNT(1), gcnt1_restore); @@ -3565,7 +3584,8 @@ cleanup: CPR3_IRQ_UP | CPR3_IRQ_DOWN | CPR3_IRQ_MID); if (ctrl->supports_hw_closed_loop) { - if (ctrl->ctrl_type == CPR_CTRL_TYPE_CPR4) { + if (ctrl->ctrl_type == CPR_CTRL_TYPE_CPR4 || + ctrl->ctrl_type == CPR_CTRL_TYPE_CPRH) { cpr3_masked_write(ctrl, CPR4_REG_MARGIN_ADJ_CTL, CPR4_MARGIN_ADJ_CTL_HW_CLOSED_LOOP_EN_MASK, ctrl->use_hw_closed_loop @@ -3867,6 +3887,126 @@ cleanup: } /** + * cprh_regulator_aging_adjust() - adjust the target quotients and open-loop + * voltages for CPRh regulators based on the output of CPR aging + * sensors + * @ctrl: Pointer to the CPR3 controller + * + * Return: 0 on success, errno on failure + */ +static int cprh_regulator_aging_adjust(struct cpr3_controller *ctrl) +{ + int i, j, id, rc, rc2, aging_volt, init_volt; + int max_aging_volt = 0; + u32 reg; + + if (!ctrl->aging_required || !ctrl->cpr_enabled) + return 0; + + if (!ctrl->vdd_regulator) { + cpr3_err(ctrl, "vdd-supply regulator missing\n"); + return -ENODEV; + } + + init_volt = regulator_get_voltage(ctrl->vdd_regulator); + if (init_volt < 0) { + cpr3_err(ctrl, "could not get vdd-supply voltage, rc=%d\n", + init_volt); + return init_volt; + } + + if (init_volt > ctrl->aging_ref_volt) { + cpr3_info(ctrl, "unable to perform CPR aging measurement as vdd=%d uV > aging voltage=%d uV\n", + init_volt, ctrl->aging_ref_volt); + return 0; + } + + /* Verify that none of the aging sensors are currently masked. */ + for (i = 0; i < ctrl->aging_sensor_count; i++) { + id = ctrl->aging_sensor[i].sensor_id; + reg = cpr3_read(ctrl, CPR3_REG_SENSOR_MASK_READ(id)); + if (reg & BIT(id % 32)) { + cpr3_info(ctrl, "unable to perform CPR aging measurement as CPR sensor %d is masked\n", + id); + return 0; + } + } + + rc = regulator_set_voltage(ctrl->vdd_regulator, ctrl->aging_ref_volt, + INT_MAX); + if (rc) { + cpr3_err(ctrl, "unable to set vdd-supply to aging voltage=%d uV, rc=%d\n", + ctrl->aging_ref_volt, rc); + return rc; + } + + if (ctrl->aging_vdd_mode) { + rc = regulator_set_mode(ctrl->vdd_regulator, + ctrl->aging_vdd_mode); + if (rc) { + cpr3_err(ctrl, "unable to configure vdd-supply for mode=%u, rc=%d\n", + ctrl->aging_vdd_mode, rc); + goto cleanup; + } + } + + /* Perform aging measurement on all aging sensors */ + for (i = 0; i < ctrl->aging_sensor_count; i++) { + for (j = 0; j < CPR3_AGING_RETRY_COUNT; j++) { + rc = cpr3_regulator_measure_aging(ctrl, + &ctrl->aging_sensor[i]); + if (!rc) + break; + } + + if (!rc) { + aging_volt = + cpr3_voltage_adjustment( + ctrl->aging_sensor[i].ro_scale, + ctrl->aging_sensor[i].measured_quot_diff + - ctrl->aging_sensor[i].init_quot_diff); + max_aging_volt = max(max_aging_volt, aging_volt); + } else { + cpr3_err(ctrl, "CPR aging measurement failed after %d tries, rc=%d\n", + j, rc); + ctrl->aging_failed = true; + ctrl->aging_required = false; + goto cleanup; + } + } + +cleanup: + /* Adjust the CPR target quotients according to the aging measurement */ + if (!rc) { + cpr3_regulator_set_aging_ref_adjustment(ctrl, max_aging_volt); + + cpr3_info(ctrl, "aging measurement successful; aging reference adjustment voltage=%d uV\n", + ctrl->aging_ref_adjust_volt); + ctrl->aging_succeeded = true; + ctrl->aging_required = false; + } + + rc2 = regulator_set_voltage(ctrl->vdd_regulator, init_volt, INT_MAX); + if (rc2) { + cpr3_err(ctrl, "unable to reset vdd-supply to initial voltage=%d uV, rc=%d\n", + init_volt, rc2); + return rc2; + } + + if (ctrl->aging_complete_vdd_mode) { + rc2 = regulator_set_mode(ctrl->vdd_regulator, + ctrl->aging_complete_vdd_mode); + if (rc2) { + cpr3_err(ctrl, "unable to configure vdd-supply for mode=%u, rc=%d\n", + ctrl->aging_complete_vdd_mode, rc2); + return rc2; + } + } + + return rc; +} + +/** * cpr3_regulator_update_ctrl_state() - update the state of the CPR controller * to reflect the corners used by all CPR3 regulators as well as * the CPR operating mode and perform aging adjustments if needed diff --git a/drivers/regulator/cpr3-util.c b/drivers/regulator/cpr3-util.c index 51179f28fcf5..e3e05b6ad352 100644 --- a/drivers/regulator/cpr3-util.c +++ b/drivers/regulator/cpr3-util.c @@ -1202,6 +1202,23 @@ int cpr3_parse_common_ctrl_data(struct cpr3_controller *ctrl) if (rc) return rc; + ctrl->vdd_regulator = devm_regulator_get(ctrl->dev, "vdd"); + if (IS_ERR(ctrl->vdd_regulator)) { + rc = PTR_ERR(ctrl->vdd_regulator); + if (rc != -EPROBE_DEFER) { + /* vdd-supply is optional for CPRh controllers. */ + if (ctrl->ctrl_type == CPR_CTRL_TYPE_CPRH) { + cpr3_debug(ctrl, "unable to request vdd regulator, rc=%d\n", + rc); + ctrl->vdd_regulator = NULL; + return 0; + } + cpr3_err(ctrl, "unable to request vdd regulator, rc=%d\n", + rc); + } + return rc; + } + /* * Regulator device handles are not necessary for CPRh controllers * since communication with the regulators is completely managed @@ -1210,15 +1227,6 @@ int cpr3_parse_common_ctrl_data(struct cpr3_controller *ctrl) if (ctrl->ctrl_type == CPR_CTRL_TYPE_CPRH) return rc; - ctrl->vdd_regulator = devm_regulator_get(ctrl->dev, "vdd"); - if (IS_ERR(ctrl->vdd_regulator)) { - rc = PTR_ERR(ctrl->vdd_regulator); - if (rc != -EPROBE_DEFER) - cpr3_err(ctrl, "unable request vdd regulator, rc=%d\n", - rc); - return rc; - } - ctrl->system_regulator = devm_regulator_get_optional(ctrl->dev, "system"); if (IS_ERR(ctrl->system_regulator)) { |