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 }
28 	[AD3542R_CH_OUTPUT_RANGE_NEG_2P5__7P5V]	= { -2500, 7500 },
29 	[AD3542R_CH_OUTPUT_RANGE_NEG_5__5V]	= { -5000, 5000 }
58 	 *	Vmax = 2.5 - [(GainP + Offset / 1024) * 2.5 * Rfb * 1.03]  in ad3552r_get_custom_range()
63 	common = 2575 * ch_data->rfb;  in ad3552r_get_custom_range()
64 	offset = ch_data->gain_offset;  in ad3552r_get_custom_range()
66 	gn = gains_scaling_table[ch_data->n];  in ad3552r_get_custom_range()
71 	gp = gains_scaling_table[ch_data->p];  in ad3552r_get_custom_range()
72 	tmp = (1024 * gp - AD3552R_GAIN_SCALE * offset) * common;  in ad3552r_get_custom_range()
74 	*v_min = vref - tmp;  in ad3552r_get_custom_range()
83 	if (ch_data->range_override) {  in ad3552r_calc_gain_and_offset()
86 		/* Normal range */  in ad3552r_calc_gain_and_offset()
87 		idx = ch_data->range;  in ad3552r_calc_gain_and_offset()
88 		v_min = model_data->ranges_table[idx][0];  in ad3552r_calc_gain_and_offset()
89 		v_max = model_data->ranges_table[idx][1];  in ad3552r_calc_gain_and_offset()
102 	span = v_max - v_min;  in ad3552r_calc_gain_and_offset()
103 	ch_data->scale_int = div_s64_rem(span, 65536, &rem);  in ad3552r_calc_gain_and_offset()
105 	ch_data->scale_dec = DIV_ROUND_CLOSEST((s64)rem * 1000000, 65536);  in ad3552r_calc_gain_and_offset()
107 	ch_data->offset_int = div_s64_rem(v_min * 65536, span, &rem);  in ad3552r_calc_gain_and_offset()
109 	ch_data->offset_dec = div_s64(tmp, span);  in ad3552r_calc_gain_and_offset()
119 	if (voltage < 0 && voltage != -ENODEV)  in ad3552r_get_ref_voltage()
123 	if (voltage == -ENODEV) {  in ad3552r_get_ref_voltage()
124 		if (device_property_read_bool(dev, "adi,vref-out-en"))  in ad3552r_get_ref_voltage()
132 	if (voltage > 2500000 + delta || voltage < 2500000 - delta) {  in ad3552r_get_ref_voltage()
133 		dev_warn(dev, "vref-supply must be 2.5V");  in ad3552r_get_ref_voltage()
134 		return -EINVAL;  in ad3552r_get_ref_voltage()
148 	err = device_property_read_u32(dev, "adi,sdo-drive-strength",  in ad3552r_get_drive_strength()
154 		dev_err_probe(dev, -EINVAL,  in ad3552r_get_drive_strength()
155 			      "adi,sdo-drive-strength must be less than 4\n");  in ad3552r_get_drive_strength()
156 		return -EINVAL;  in ad3552r_get_drive_strength()
172 					    "custom-output-range-config");  in ad3552r_get_custom_gain()
175 		return dev_err_probe(dev, -EINVAL,  in ad3552r_get_custom_gain()
176 				     "custom-output-range-config mandatory\n");  in ad3552r_get_custom_gain()
178 	err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-p", &val);  in ad3552r_get_custom_gain()
181 				     "adi,gain-scaling-p mandatory\n");  in ad3552r_get_custom_gain()
184 	err = fwnode_property_read_u32(gain_child, "adi,gain-scaling-n", &val);  in ad3552r_get_custom_gain()
187 				     "adi,gain-scaling-n property mandatory\n");  in ad3552r_get_custom_gain()
190 	err = fwnode_property_read_u32(gain_child, "adi,rfb-ohms", &val);  in ad3552r_get_custom_gain()
193 				     "adi,rfb-ohms mandatory\n");  in ad3552r_get_custom_gain()
196 	err = fwnode_property_read_u32(gain_child, "adi,gain-offset", &val);  in ad3552r_get_custom_gain()
199 				     "adi,gain-offset mandatory\n");  in ad3552r_get_custom_gain()
211 	for (i = 0; i < model_info->num_ranges; i++)  in ad3552r_find_range()
212 		if (vals[0] == model_info->ranges_table[i][0] * 1000 &&  in ad3552r_find_range()
213 		    vals[1] == model_info->ranges_table[i][1] * 1000)  in ad3552r_find_range()
216 	return -EINVAL;  in ad3552r_find_range()
226 	/* This property is optional, so returning -ENOENT if missing */  in ad3552r_get_output_range()
227 	if (!fwnode_property_present(child, "adi,output-range-microvolt"))  in ad3552r_get_output_range()
228 		return -ENOENT;  in ad3552r_get_output_range()
231 					     "adi,output-range-microvolt",  in ad3552r_get_output_range()
235 				"invalid adi,output-range-microvolt\n");  in ad3552r_get_output_range()
240 			"invalid adi,output-range-microvolt value\n");  in ad3552r_get_output_range()