1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2021 Texas Instruments Incorporated - http://www.ti.com/
73  * struct err_values - structure containing error/reference values
74  * @refs: reference error values for -40C, 30C, 125C & 150C
75  * @errs: Actual error values for -40C, 30C, 125C & 150C read from the efuse
90 		idx1 = err_vals->refs[seg];  in create_table_segments()
92 	idx2 = err_vals->refs[seg + 1];  in create_table_segments()
93 	err1 = err_vals->errs[seg];  in create_table_segments()
94 	err2 = err_vals->errs[seg + 1];  in create_table_segments()
95 	ref1 = err_vals->refs[seg];  in create_table_segments()
96 	ref2 = err_vals->refs[seg + 1];  in create_table_segments()
100 	 * as the y-axis param and err in adc value as x-axis param  in create_table_segments()
102 	num = ref2 - ref1;  in create_table_segments()
103 	den = err2 - err1;  in create_table_segments()
106 	c = ref2 - m * err2;  in create_table_segments()
114 			err = (i - c) / m;  in create_table_segments()
134 	 * region -40C to +30C  in prep_lookup_table()
152 		while (i--)  in prep_lookup_table()
153 			derived_table[i] = derived_table[i + 1] - 300;  in prep_lookup_table()
160 	i = TABLE_SIZE - 1;  in prep_lookup_table()
162 		i--;  in prep_lookup_table()
167 		derived_table[i] = derived_table[i - 1] + inc * 100;  in prep_lookup_table()
198 	return (0 - tmp);  in two_cmp()
204 	int d01 = abs(s0 - s1);  in vtm_get_best_value()
205 	int d02 = abs(s0 - s2);  in vtm_get_best_value()
206 	int d12 = abs(s1 - s2);  in vtm_get_best_value()
223 	bgp = devdata->bgp;  in k3_bgp_read_temp()
225 	 * Errata is applicable for am654 pg 1.0 silicon/J7ES. There  in k3_bgp_read_temp()
226 	 * is a variation of the order for certain degree centigrade on AM654.  in k3_bgp_read_temp()
233 	s0 = readl(bgp->base + devdata->stat_offset) &  in k3_bgp_read_temp()
235 	s1 = readl(bgp->base + devdata->stat_offset) &  in k3_bgp_read_temp()
237 	s2 = readl(bgp->base + devdata->stat_offset) &  in k3_bgp_read_temp()
242 		return -EINVAL;  in k3_bgp_read_temp()
261 	int low = 0, high = TABLE_SIZE - 1, mid;  in k3_j72xx_bandgap_temp_to_adc_code()
263 	if (temp > 160000 || temp < -50000)  in k3_j72xx_bandgap_temp_to_adc_code()
264 		return -EINVAL;  in k3_j72xx_bandgap_temp_to_adc_code()
267 	while (low < (high - 1)) {  in k3_j72xx_bandgap_temp_to_adc_code()
285 		{ 0x0, -1,  0x4 },  in get_efuse_values()
286 		{ 0x0, 0xC, -1 },  in get_efuse_values()
298 		/* Extract the offset value using bit-mask */  in get_efuse_values()
299 		if (ct_offsets[id][i] == -1 && i == 1) {  in get_efuse_values()
304 		} else if (ct_offsets[id][i] == -1 && i == 2) {  in get_efuse_values()
348 	for (id = 0; id < bgp->cnt; id++) {  in k3_j72xx_bandgap_init_hw()
349 		data = bgp->ts_data[id];  in k3_j72xx_bandgap_init_hw()
350 		val = readl(bgp->cfg2_base + data->ctrl_offset);  in k3_j72xx_bandgap_init_hw()
354 		writel(val, bgp->cfg2_base + data->ctrl_offset);  in k3_j72xx_bandgap_init_hw()
367 	writel((low_temp << 16) | high_max, bgp->cfg2_base + K3_VTM_MISC_CTRL2_OFFSET);  in k3_j72xx_bandgap_init_hw()
368 	writel(K3_VTM_ANYMAXT_OUTRG_ALERT_EN, bgp->cfg2_base + K3_VTM_MISC_CTRL_OFFSET);  in k3_j72xx_bandgap_init_hw()
379 	struct device *dev = &pdev->dev;  in k3_j72xx_bandgap_probe()
390 		-490019999999999936,  in k3_j72xx_bandgap_probe()
392 		-1705800000000,  in k3_j72xx_bandgap_probe()
394 		-92627,  in k3_j72xx_bandgap_probe()
398 		-415230000000000000,  in k3_j72xx_bandgap_probe()
400 		-1157800000000,  in k3_j72xx_bandgap_probe()
403 	bgp = devm_kzalloc(&pdev->dev, sizeof(*bgp), GFP_KERNEL);  in k3_j72xx_bandgap_probe()
405 		return -ENOMEM;  in k3_j72xx_bandgap_probe()
407 	bgp->dev = dev;  in k3_j72xx_bandgap_probe()
409 	bgp->base = devm_ioremap_resource(dev, res);  in k3_j72xx_bandgap_probe()
410 	if (IS_ERR(bgp->base))  in k3_j72xx_bandgap_probe()
411 		return PTR_ERR(bgp->base);  in k3_j72xx_bandgap_probe()
414 	bgp->cfg2_base = devm_ioremap_resource(dev, res);  in k3_j72xx_bandgap_probe()
415 	if (IS_ERR(bgp->cfg2_base))  in k3_j72xx_bandgap_probe()
416 		return PTR_ERR(bgp->cfg2_base);  in k3_j72xx_bandgap_probe()
420 		workaround_needed = driver_data->has_errata_i2128;  in k3_j72xx_bandgap_probe()
441 	dev_dbg(bgp->dev, "Work around %sneeded\n",  in k3_j72xx_bandgap_probe()
452 	/* Get the sensor count in the VTM */  in k3_j72xx_bandgap_probe()
453 	val = readl(bgp->base + K3_VTM_DEVINFO_PWR0_OFFSET);  in k3_j72xx_bandgap_probe()
454 	bgp->cnt = val & K3_VTM_DEVINFO_PWR0_TEMPSENS_CT_MASK;  in k3_j72xx_bandgap_probe()
455 	bgp->cnt >>= __ffs(K3_VTM_DEVINFO_PWR0_TEMPSENS_CT_MASK);  in k3_j72xx_bandgap_probe()
457 	data = devm_kcalloc(bgp->dev, bgp->cnt, sizeof(*data), GFP_KERNEL);  in k3_j72xx_bandgap_probe()
459 		ret = -ENOMEM;  in k3_j72xx_bandgap_probe()
465 		ret = -ENOMEM;  in k3_j72xx_bandgap_probe()
469 	derived_table = devm_kzalloc(bgp->dev, sizeof(*derived_table) * TABLE_SIZE,  in k3_j72xx_bandgap_probe()
472 		ret = -ENOMEM;  in k3_j72xx_bandgap_probe()
482 	for (id = 0; id < bgp->cnt; id++) {  in k3_j72xx_bandgap_probe()
489 			/* ref adc values for -40C, 30C & 125C respectively */  in k3_j72xx_bandgap_probe()
502 		bgp->ts_data[id] = &data[id];  in k3_j72xx_bandgap_probe()
508 	for (id = 0; id < bgp->cnt; id++) {  in k3_j72xx_bandgap_probe()
509 		ti_thermal = devm_thermal_of_zone_register(bgp->dev, id, &data[id],  in k3_j72xx_bandgap_probe()
512 			dev_err(bgp->dev, "thermal zone device is NULL\n");  in k3_j72xx_bandgap_probe()
533 	pm_runtime_put_sync(&pdev->dev);  in k3_j72xx_bandgap_probe()
534 	pm_runtime_disable(&pdev->dev);  in k3_j72xx_bandgap_probe()
541 	pm_runtime_put_sync(&pdev->dev);  in k3_j72xx_bandgap_remove()
542 	pm_runtime_disable(&pdev->dev);  in k3_j72xx_bandgap_remove()
584 		.compatible = "ti,j721e-vtm",
588 		.compatible = "ti,j7200-vtm",
599 		.name = "k3-j72xx-soc-thermal",
609 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");