Lines Matching +full:vref +full:- +full:p
1 // SPDX-License-Identifier: GPL-2.0+
3 // Copyright (c) 2010-2024 Analog Devices Inc.
18 [AD3552R_CH_OUTPUT_RANGE_NEG_5__5V] = { -5000, 5000 },
19 [AD3552R_CH_OUTPUT_RANGE_NEG_10__10V] = { -10000, 10000 }
26 [AD3542R_CH_OUTPUT_RANGE_NEG_5__5V] = { -5000, 5000 },
27 [AD3542R_CH_OUTPUT_RANGE_NEG_2P5__7P5V] = { -2500, 7500 }
82 u16 ad3552r_calc_custom_gain(u8 p, u8 n, s16 goffs)
85 FIELD_PREP(AD3552R_MASK_CH_GAIN_SCALING_P, p) |
95 s64 vref, tmp, common, offset, gn, gp;
99 * Vmax = 2.5 - [(GainP + Offset / 1024) * 2.5 * Rfb * 1.03]
102 vref = 2500;
104 common = 2575 * ch_data->rfb;
105 offset = ch_data->gain_offset;
107 gn = gains_scaling_table[ch_data->n];
110 *v_max = vref + tmp;
112 gp = gains_scaling_table[ch_data->p];
113 tmp = (1024 * gp - AD3552R_GAIN_SCALE * offset) * common;
115 *v_min = vref - tmp;
124 if (ch_data->range_override) {
128 idx = ch_data->range;
129 v_min = model_data->ranges_table[idx][0];
130 v_max = model_data->ranges_table[idx][1];
143 span = v_max - v_min;
144 ch_data->scale_int = div_s64_rem(span, 65536, &rem);
146 ch_data->scale_dec = DIV_ROUND_CLOSEST((s64)rem * 1000000, 65536);
148 ch_data->offset_int = div_s64_rem(v_min * 65536, span, &rem);
150 ch_data->offset_dec = div_s64(tmp, span);
159 voltage = devm_regulator_get_enable_read_voltage(dev, "vref");
160 if (voltage < 0 && voltage != -ENODEV)
162 "Error getting vref voltage\n");
164 if (voltage == -ENODEV) {
165 if (device_property_read_bool(dev, "adi,vref-out-en"))
173 if (voltage > 2500000 + delta || voltage < 2500000 - delta) {
174 dev_warn(dev, "vref-supply must be 2.5V");
175 return -EINVAL;
189 err = device_property_read_u32(dev, "adi,sdo-drive-strength",
195 dev_err_probe(dev, -EINVAL,
196 "adi,sdo-drive-strength must be less than 4\n");
197 return -EINVAL;
213 "custom-output-range-config");
216 return dev_err_probe(dev, -EINVAL,
217 "custom-output-range-config mandatory\n");
219 err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-p", &val);
222 "adi,gain-scaling-p mandatory\n");
225 err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-n", &val);
228 "adi,gain-scaling-n property mandatory\n");
231 err = fwnode_property_read_u32(gain_child, "adi,rfb-ohms", &val);
234 "adi,rfb-ohms mandatory\n");
237 err = fwnode_property_read_u32(gain_child, "adi,gain-offset", &val);
240 "adi,gain-offset mandatory\n");
252 for (i = 0; i < model_info->num_ranges; i++)
253 if (vals[0] == model_info->ranges_table[i][0] * 1000 &&
254 vals[1] == model_info->ranges_table[i][1] * 1000)
257 return -EINVAL;
267 /* This property is optional, so returning -ENOENT if missing */
268 if (!fwnode_property_present(child, "adi,output-range-microvolt"))
269 return -ENOENT;
272 "adi,output-range-microvolt",
276 "invalid adi,output-range-microvolt\n");
281 "invalid adi,output-range-microvolt value\n");