Lines Matching +full:slew +full:- +full:percent
56 struct vctrl_voltage_range *ctrl = &vctrl->vrange.ctrl; in vctrl_calc_ctrl_voltage()
57 struct vctrl_voltage_range *out = &vctrl->vrange.out; in vctrl_calc_ctrl_voltage()
59 return ctrl->min_uV + in vctrl_calc_ctrl_voltage()
60 DIV_ROUND_CLOSEST_ULL((s64)(out_uV - out->min_uV) * in vctrl_calc_ctrl_voltage()
61 (ctrl->max_uV - ctrl->min_uV), in vctrl_calc_ctrl_voltage()
62 out->max_uV - out->min_uV); in vctrl_calc_ctrl_voltage()
67 struct vctrl_voltage_range *ctrl = &vctrl->vrange.ctrl; in vctrl_calc_output_voltage()
68 struct vctrl_voltage_range *out = &vctrl->vrange.out; in vctrl_calc_output_voltage()
75 if (ctrl_uV < ctrl->min_uV) in vctrl_calc_output_voltage()
76 return out->min_uV; in vctrl_calc_output_voltage()
78 if (ctrl_uV > ctrl->max_uV) in vctrl_calc_output_voltage()
79 return out->max_uV; in vctrl_calc_output_voltage()
81 return out->min_uV + in vctrl_calc_output_voltage()
82 DIV_ROUND_CLOSEST_ULL((s64)(ctrl_uV - ctrl->min_uV) * in vctrl_calc_output_voltage()
83 (out->max_uV - out->min_uV), in vctrl_calc_output_voltage()
84 ctrl->max_uV - ctrl->min_uV); in vctrl_calc_output_voltage()
90 int ctrl_uV = regulator_get_voltage(vctrl->ctrl_reg); in vctrl_get_voltage()
100 struct regulator *ctrl_reg = vctrl->ctrl_reg; in vctrl_set_voltage()
105 if (req_min_uV >= uV || !vctrl->ovp_threshold) in vctrl_set_voltage()
113 int max_drop_uV = (uV * vctrl->ovp_threshold) / 100; in vctrl_set_voltage()
122 next_uV = max_t(int, req_min_uV, uV - max_drop_uV); in vctrl_set_voltage()
131 delay = DIV_ROUND_UP(uV - next_uV, vctrl->min_slew_down_rate); in vctrl_set_voltage()
150 return vctrl->sel; in vctrl_get_voltage_sel()
157 struct regulator *ctrl_reg = vctrl->ctrl_reg; in vctrl_set_voltage_sel()
158 unsigned int orig_sel = vctrl->sel; in vctrl_set_voltage_sel()
161 if (selector >= rdev->desc->n_voltages) in vctrl_set_voltage_sel()
162 return -EINVAL; in vctrl_set_voltage_sel()
164 if (selector >= vctrl->sel || !vctrl->ovp_threshold) { in vctrl_set_voltage_sel()
167 vctrl->vtable[selector].ctrl, in vctrl_set_voltage_sel()
168 vctrl->vtable[selector].ctrl); in vctrl_set_voltage_sel()
170 vctrl->sel = selector; in vctrl_set_voltage_sel()
175 while (vctrl->sel != selector) { in vctrl_set_voltage_sel()
179 if (selector >= vctrl->vtable[vctrl->sel].ovp_min_sel) in vctrl_set_voltage_sel()
182 next_sel = vctrl->vtable[vctrl->sel].ovp_min_sel; in vctrl_set_voltage_sel()
185 vctrl->vtable[next_sel].ctrl, in vctrl_set_voltage_sel()
186 vctrl->vtable[next_sel].ctrl); in vctrl_set_voltage_sel()
188 dev_err(&rdev->dev, in vctrl_set_voltage_sel()
190 vctrl->vtable[next_sel].ctrl); in vctrl_set_voltage_sel()
193 vctrl->sel = next_sel; in vctrl_set_voltage_sel()
195 delay = DIV_ROUND_UP(vctrl->vtable[vctrl->sel].out - in vctrl_set_voltage_sel()
196 vctrl->vtable[next_sel].out, in vctrl_set_voltage_sel()
197 vctrl->min_slew_down_rate); in vctrl_set_voltage_sel()
204 if (vctrl->sel != orig_sel) { in vctrl_set_voltage_sel()
207 vctrl->vtable[orig_sel].ctrl, in vctrl_set_voltage_sel()
208 vctrl->vtable[orig_sel].ctrl)) in vctrl_set_voltage_sel()
209 vctrl->sel = orig_sel; in vctrl_set_voltage_sel()
211 dev_warn(&rdev->dev, in vctrl_set_voltage_sel()
223 if (selector >= rdev->desc->n_voltages) in vctrl_list_voltage()
224 return -EINVAL; in vctrl_list_voltage()
226 return vctrl->vtable[selector].out; in vctrl_list_voltage()
233 struct device_node *np = pdev->dev.of_node; in vctrl_parse_dt()
237 vctrl->ctrl_reg = devm_regulator_get(&pdev->dev, "ctrl"); in vctrl_parse_dt()
238 if (IS_ERR(vctrl->ctrl_reg)) in vctrl_parse_dt()
239 return PTR_ERR(vctrl->ctrl_reg); in vctrl_parse_dt()
241 ret = of_property_read_u32(np, "ovp-threshold-percent", &pval); in vctrl_parse_dt()
243 vctrl->ovp_threshold = pval; in vctrl_parse_dt()
244 if (vctrl->ovp_threshold > 100) { in vctrl_parse_dt()
245 dev_err(&pdev->dev, in vctrl_parse_dt()
246 "ovp-threshold-percent (%u) > 100\n", in vctrl_parse_dt()
247 vctrl->ovp_threshold); in vctrl_parse_dt()
248 return -EINVAL; in vctrl_parse_dt()
252 ret = of_property_read_u32(np, "min-slew-down-rate", &pval); in vctrl_parse_dt()
254 vctrl->min_slew_down_rate = pval; in vctrl_parse_dt()
257 if (vctrl->min_slew_down_rate == 0) { in vctrl_parse_dt()
258 dev_err(&pdev->dev, in vctrl_parse_dt()
259 "min-slew-down-rate must not be 0\n"); in vctrl_parse_dt()
260 return -EINVAL; in vctrl_parse_dt()
261 } else if (vctrl->min_slew_down_rate > INT_MAX) { in vctrl_parse_dt()
262 dev_err(&pdev->dev, "min-slew-down-rate (%u) too big\n", in vctrl_parse_dt()
263 vctrl->min_slew_down_rate); in vctrl_parse_dt()
264 return -EINVAL; in vctrl_parse_dt()
268 if (vctrl->ovp_threshold && !vctrl->min_slew_down_rate) { in vctrl_parse_dt()
269 dev_err(&pdev->dev, in vctrl_parse_dt()
270 "ovp-threshold-percent requires min-slew-down-rate\n"); in vctrl_parse_dt()
271 return -EINVAL; in vctrl_parse_dt()
274 ret = of_property_read_u32(np, "regulator-min-microvolt", &pval); in vctrl_parse_dt()
276 dev_err(&pdev->dev, in vctrl_parse_dt()
277 "failed to read regulator-min-microvolt: %d\n", ret); in vctrl_parse_dt()
280 vctrl->vrange.out.min_uV = pval; in vctrl_parse_dt()
282 ret = of_property_read_u32(np, "regulator-max-microvolt", &pval); in vctrl_parse_dt()
284 dev_err(&pdev->dev, in vctrl_parse_dt()
285 "failed to read regulator-max-microvolt: %d\n", ret); in vctrl_parse_dt()
288 vctrl->vrange.out.max_uV = pval; in vctrl_parse_dt()
290 ret = of_property_read_u32_array(np, "ctrl-voltage-range", vrange_ctrl, in vctrl_parse_dt()
293 dev_err(&pdev->dev, "failed to read ctrl-voltage-range: %d\n", in vctrl_parse_dt()
299 dev_err(&pdev->dev, "ctrl-voltage-range is invalid: %d-%d\n", in vctrl_parse_dt()
301 return -EINVAL; in vctrl_parse_dt()
304 vctrl->vrange.ctrl.min_uV = vrange_ctrl[0]; in vctrl_parse_dt()
305 vctrl->vrange.ctrl.max_uV = vrange_ctrl[1]; in vctrl_parse_dt()
315 return at->ctrl - bt->ctrl; in vctrl_cmp_ctrl_uV()
321 struct regulator_desc *rdesc = &vctrl->desc; in vctrl_init_vtable()
322 struct regulator *ctrl_reg = vctrl->ctrl_reg; in vctrl_init_vtable()
323 struct vctrl_voltage_range *vrange_ctrl = &vctrl->vrange.ctrl; in vctrl_init_vtable()
330 rdesc->n_voltages = n_voltages; in vctrl_init_vtable()
336 if (ctrl_uV < vrange_ctrl->min_uV || in vctrl_init_vtable()
337 ctrl_uV > vrange_ctrl->max_uV) { in vctrl_init_vtable()
338 rdesc->n_voltages--; in vctrl_init_vtable()
343 if (rdesc->n_voltages == 0) { in vctrl_init_vtable()
344 dev_err(&pdev->dev, "invalid configuration\n"); in vctrl_init_vtable()
345 return -EINVAL; in vctrl_init_vtable()
348 vctrl->vtable = devm_kcalloc(&pdev->dev, rdesc->n_voltages, in vctrl_init_vtable()
351 if (!vctrl->vtable) in vctrl_init_vtable()
352 return -ENOMEM; in vctrl_init_vtable()
358 if (ctrl_uV < vrange_ctrl->min_uV || in vctrl_init_vtable()
359 ctrl_uV > vrange_ctrl->max_uV) in vctrl_init_vtable()
362 vctrl->vtable[idx_vt].ctrl = ctrl_uV; in vctrl_init_vtable()
363 vctrl->vtable[idx_vt].out = in vctrl_init_vtable()
369 sort(vctrl->vtable, rdesc->n_voltages, in vctrl_init_vtable()
373 /* pre-calculate OVP-safe downward transitions */ in vctrl_init_vtable()
374 for (i = rdesc->n_voltages - 1; i > 0; i--) { in vctrl_init_vtable()
376 int ovp_min_uV = (vctrl->vtable[i].out * in vctrl_init_vtable()
377 (100 - vctrl->ovp_threshold)) / 100; in vctrl_init_vtable()
380 if (vctrl->vtable[j].out >= ovp_min_uV) { in vctrl_init_vtable()
381 vctrl->vtable[i].ovp_min_sel = j; in vctrl_init_vtable()
387 dev_warn(&pdev->dev, "switching down from %duV may cause OVP shutdown\n", in vctrl_init_vtable()
388 vctrl->vtable[i].out); in vctrl_init_vtable()
390 vctrl->vtable[i].ovp_min_sel = i - 1; in vctrl_init_vtable()
400 int ret = regulator_enable(vctrl->ctrl_reg); in vctrl_enable()
403 vctrl->enabled = true; in vctrl_enable()
411 int ret = regulator_disable(vctrl->ctrl_reg); in vctrl_disable()
414 vctrl->enabled = false; in vctrl_disable()
423 return vctrl->enabled; in vctrl_is_enabled()
446 struct device_node *np = pdev->dev.of_node; in vctrl_probe()
455 vctrl = devm_kzalloc(&pdev->dev, sizeof(struct vctrl_data), in vctrl_probe()
458 return -ENOMEM; in vctrl_probe()
466 vrange_ctrl = &vctrl->vrange.ctrl; in vctrl_probe()
468 rdesc = &vctrl->desc; in vctrl_probe()
469 rdesc->name = "vctrl"; in vctrl_probe()
470 rdesc->type = REGULATOR_VOLTAGE; in vctrl_probe()
471 rdesc->owner = THIS_MODULE; in vctrl_probe()
473 if ((regulator_get_linear_step(vctrl->ctrl_reg) == 1) || in vctrl_probe()
474 (regulator_count_voltages(vctrl->ctrl_reg) == -EINVAL)) { in vctrl_probe()
475 rdesc->continuous_voltage_range = true; in vctrl_probe()
476 rdesc->ops = &vctrl_ops_cont; in vctrl_probe()
478 rdesc->ops = &vctrl_ops_non_cont; in vctrl_probe()
481 init_data = of_get_regulator_init_data(&pdev->dev, np, rdesc); in vctrl_probe()
483 return -ENOMEM; in vctrl_probe()
486 cfg.dev = &pdev->dev; in vctrl_probe()
490 if (!rdesc->continuous_voltage_range) { in vctrl_probe()
495 ctrl_uV = regulator_get_voltage(vctrl->ctrl_reg); in vctrl_probe()
497 dev_err(&pdev->dev, "failed to get control voltage\n"); in vctrl_probe()
502 if (ctrl_uV < vrange_ctrl->min_uV) { in vctrl_probe()
503 vctrl->sel = 0; in vctrl_probe()
504 } else if (ctrl_uV > vrange_ctrl->max_uV) { in vctrl_probe()
505 vctrl->sel = rdesc->n_voltages - 1; in vctrl_probe()
509 for (i = 0; i < rdesc->n_voltages; i++) { in vctrl_probe()
510 if (ctrl_uV == vctrl->vtable[i].ctrl) { in vctrl_probe()
511 vctrl->sel = i; in vctrl_probe()
518 vctrl->rdev = devm_regulator_register(&pdev->dev, rdesc, &cfg); in vctrl_probe()
519 if (IS_ERR(vctrl->rdev)) { in vctrl_probe()
520 ret = PTR_ERR(vctrl->rdev); in vctrl_probe()
521 dev_err(&pdev->dev, "failed to register regulator: %d\n", ret); in vctrl_probe()
529 { .compatible = "vctrl-regulator", },
537 .name = "vctrl-regulator",