1 // SPDX-License-Identifier: GPL-2.0
8 #include <linux/hwmon-sysfs.h>
9 #include <linux/mfd/gsc.h>
26 	struct gsc_dev *gsc;  member
59 	u8 reg = hwmon->pdata->fan_base + (2 * attr->index);  in pwm_auto_point_temp_show()
63 	ret = regmap_bulk_read(hwmon->regmap, reg, regs, 2);  in pwm_auto_point_temp_show()
77 	u8 reg = hwmon->pdata->fan_base + (2 * attr->index);  in pwm_auto_point_temp_store()
83 		return -EINVAL;  in pwm_auto_point_temp_store()
90 	err = regmap_bulk_write(hwmon->regmap, reg, regs, 2);  in pwm_auto_point_temp_store()
103 	return sprintf(buf, "%d\n", 255 * (50 + (attr->index * 10)));  in pwm_auto_point_pwm_show()
157 		ch = hwmon->in_ch[channel];  in gsc_hwmon_read()
160 		ch = hwmon->temp_ch[channel];  in gsc_hwmon_read()
163 		ch = hwmon->fan_ch[channel];  in gsc_hwmon_read()
166 		return -EOPNOTSUPP;  in gsc_hwmon_read()
169 	sz = (ch->mode == mode_voltage_24bit) ? 3 : 2;  in gsc_hwmon_read()
170 	ret = regmap_bulk_read(hwmon->regmap, ch->reg, buf, sz);  in gsc_hwmon_read()
175 	while (sz-- > 0)  in gsc_hwmon_read()
178 	switch (ch->mode) {  in gsc_hwmon_read()
181 			tmp -= 0xffff;  in gsc_hwmon_read()
186 		/* scale based on ref voltage and ADC resolution */  in gsc_hwmon_read()
190 		if (ch->vdiv[0] && ch->vdiv[1]) {  in gsc_hwmon_read()
191 			tmp *= (ch->vdiv[0] + ch->vdiv[1]);  in gsc_hwmon_read()
192 			tmp /= ch->vdiv[1];  in gsc_hwmon_read()
195 		tmp += ch->mvoffset;  in gsc_hwmon_read()
219 		*buf = hwmon->in_ch[channel]->name;  in gsc_hwmon_read_string()
222 		*buf = hwmon->temp_ch[channel]->name;  in gsc_hwmon_read_string()
225 		*buf = hwmon->fan_ch[channel]->name;  in gsc_hwmon_read_string()
228 		return -ENOTSUPP;  in gsc_hwmon_read_string()
250 		return ERR_PTR(-ENODEV);  in gsc_hwmon_get_devtree_pdata()
255 		return ERR_PTR(-ENOMEM);  in gsc_hwmon_get_devtree_pdata()
256 	pdata->nchannels = nchannels;  in gsc_hwmon_get_devtree_pdata()
259 	of_node_get(dev->parent->of_node);  in gsc_hwmon_get_devtree_pdata()
260 	fan = of_find_compatible_node(dev->parent->of_node, NULL, "gw,gsc-fan");  in gsc_hwmon_get_devtree_pdata()
261 	if (fan && of_property_read_u32(fan, "reg", &pdata->fan_base)) {  in gsc_hwmon_get_devtree_pdata()
264 		return ERR_PTR(-EINVAL);  in gsc_hwmon_get_devtree_pdata()
269 	ch = pdata->channels;  in gsc_hwmon_get_devtree_pdata()
272 		if (fwnode_property_read_string(child, "label", &ch->name)) {  in gsc_hwmon_get_devtree_pdata()
274 			return ERR_PTR(-EINVAL);  in gsc_hwmon_get_devtree_pdata()
276 		if (fwnode_property_read_u32(child, "reg", &ch->reg)) {  in gsc_hwmon_get_devtree_pdata()
278 			return ERR_PTR(-EINVAL);  in gsc_hwmon_get_devtree_pdata()
280 		if (fwnode_property_read_u32(child, "gw,mode", &ch->mode)) {  in gsc_hwmon_get_devtree_pdata()
282 			return ERR_PTR(-EINVAL);  in gsc_hwmon_get_devtree_pdata()
284 		if (ch->mode > mode_max) {  in gsc_hwmon_get_devtree_pdata()
286 			return ERR_PTR(-EINVAL);  in gsc_hwmon_get_devtree_pdata()
290 					      "gw,voltage-offset-microvolt",  in gsc_hwmon_get_devtree_pdata()
291 					      &ch->mvoffset))  in gsc_hwmon_get_devtree_pdata()
292 			ch->mvoffset /= 1000;  in gsc_hwmon_get_devtree_pdata()
294 					       "gw,voltage-divider-ohms",  in gsc_hwmon_get_devtree_pdata()
295 					       ch->vdiv, ARRAY_SIZE(ch->vdiv));  in gsc_hwmon_get_devtree_pdata()
304 	struct gsc_dev *gsc = dev_get_drvdata(pdev->dev.parent);  in gsc_hwmon_probe()  local
305 	struct device *dev = &pdev->dev;  in gsc_hwmon_probe()
320 		return -ENOMEM;  in gsc_hwmon_probe()
321 	hwmon->gsc = gsc;  in gsc_hwmon_probe()
322 	hwmon->pdata = pdata;  in gsc_hwmon_probe()
324 	hwmon->regmap = devm_regmap_init(dev, &gsc_hwmon_regmap_bus,  in gsc_hwmon_probe()
325 					 gsc->i2c_hwmon,  in gsc_hwmon_probe()
327 	if (IS_ERR(hwmon->regmap))  in gsc_hwmon_probe()
328 		return PTR_ERR(hwmon->regmap);  in gsc_hwmon_probe()
330 	for (i = 0, i_in = 0, i_temp = 0, i_fan = 0; i < hwmon->pdata->nchannels; i++) {  in gsc_hwmon_probe()
331 		const struct gsc_hwmon_channel *ch = &pdata->channels[i];  in gsc_hwmon_probe()
333 		switch (ch->mode) {  in gsc_hwmon_probe()
336 				dev_err(gsc->dev, "too many temp channels\n");  in gsc_hwmon_probe()
337 				return -EINVAL;  in gsc_hwmon_probe()
339 			hwmon->temp_ch[i_temp] = ch;  in gsc_hwmon_probe()
340 			hwmon->temp_config[i_temp] = HWMON_T_INPUT |  in gsc_hwmon_probe()
346 				dev_err(gsc->dev, "too many fan channels\n");  in gsc_hwmon_probe()
347 				return -EINVAL;  in gsc_hwmon_probe()
349 			hwmon->fan_ch[i_fan] = ch;  in gsc_hwmon_probe()
350 			hwmon->fan_config[i_fan] = HWMON_F_INPUT |  in gsc_hwmon_probe()
358 				dev_err(gsc->dev, "too many input channels\n");  in gsc_hwmon_probe()
359 				return -EINVAL;  in gsc_hwmon_probe()
361 			hwmon->in_ch[i_in] = ch;  in gsc_hwmon_probe()
362 			hwmon->in_config[i_in] =  in gsc_hwmon_probe()
367 			dev_err(gsc->dev, "invalid mode: %d\n", ch->mode);  in gsc_hwmon_probe()
368 			return -EINVAL;  in gsc_hwmon_probe()
373 	hwmon->chip.ops = &gsc_hwmon_ops;  in gsc_hwmon_probe()
374 	hwmon->chip.info = hwmon->info;  in gsc_hwmon_probe()
375 	hwmon->info[0] = &hwmon->temp_info;  in gsc_hwmon_probe()
376 	hwmon->info[1] = &hwmon->in_info;  in gsc_hwmon_probe()
377 	hwmon->info[2] = &hwmon->fan_info;  in gsc_hwmon_probe()
378 	hwmon->temp_info.type = hwmon_temp;  in gsc_hwmon_probe()
379 	hwmon->temp_info.config = hwmon->temp_config;  in gsc_hwmon_probe()
380 	hwmon->in_info.type = hwmon_in;  in gsc_hwmon_probe()
381 	hwmon->in_info.config = hwmon->in_config;  in gsc_hwmon_probe()
382 	hwmon->fan_info.type = hwmon_fan;  in gsc_hwmon_probe()
383 	hwmon->fan_info.config = hwmon->fan_config;  in gsc_hwmon_probe()
385 	groups = pdata->fan_base ? gsc_hwmon_groups : NULL;  in gsc_hwmon_probe()
388 							 &hwmon->chip, groups);  in gsc_hwmon_probe()
393 	{ .compatible = "gw,gsc-adc", },
400 		.name = "gsc-hwmon",
409 MODULE_DESCRIPTION("GSC hardware monitor driver");