1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) ST-Ericsson SA 2010
7  * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
26  * struct stmpe_platform_data - STMPE platform data
28  * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
29  * @irq_trigger: IRQ trigger to use for the interrupt to the host
43 	return stmpe->variant->enable(stmpe, blocks, true);  in __stmpe_enable()
48 	return stmpe->variant->enable(stmpe, blocks, false);  in __stmpe_disable()
55 	ret = stmpe->ci->read_byte(stmpe, reg);  in __stmpe_reg_read()
57 		dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret);  in __stmpe_reg_read()
59 	dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret);  in __stmpe_reg_read()
68 	dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val);  in __stmpe_reg_write()
70 	ret = stmpe->ci->write_byte(stmpe, reg, val);  in __stmpe_reg_write()
72 		dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret);  in __stmpe_reg_write()
96 	ret = stmpe->ci->read_block(stmpe, reg, length, values);  in __stmpe_block_read()
98 		dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret);  in __stmpe_block_read()
100 	dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret);  in __stmpe_block_read()
111 	dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length);  in __stmpe_block_write()
114 	ret = stmpe->ci->write_block(stmpe, reg, length, values);  in __stmpe_block_write()
116 		dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret);  in __stmpe_block_write()
122  * stmpe_enable - enable blocks on an STMPE device
130 	mutex_lock(&stmpe->lock);  in stmpe_enable()
132 	mutex_unlock(&stmpe->lock);  in stmpe_enable()
139  * stmpe_disable - disable blocks on an STMPE device
147 	mutex_lock(&stmpe->lock);  in stmpe_disable()
149 	mutex_unlock(&stmpe->lock);  in stmpe_disable()
156  * stmpe_reg_read() - read a single STMPE register
164 	mutex_lock(&stmpe->lock);  in stmpe_reg_read()
166 	mutex_unlock(&stmpe->lock);  in stmpe_reg_read()
173  * stmpe_reg_write() - write a single STMPE register
182 	mutex_lock(&stmpe->lock);  in stmpe_reg_write()
184 	mutex_unlock(&stmpe->lock);  in stmpe_reg_write()
191  * stmpe_set_bits() - set the value of a bitfield in a STMPE register
201 	mutex_lock(&stmpe->lock);  in stmpe_set_bits()
203 	mutex_unlock(&stmpe->lock);  in stmpe_set_bits()
210  * stmpe_block_read() - read multiple STMPE registers
220 	mutex_lock(&stmpe->lock);  in stmpe_block_read()
222 	mutex_unlock(&stmpe->lock);  in stmpe_block_read()
229  * stmpe_block_write() - write multiple STMPE registers
240 	mutex_lock(&stmpe->lock);  in stmpe_block_write()
242 	mutex_unlock(&stmpe->lock);  in stmpe_block_write()
249  * stmpe_set_altfunc()- set the alternate function for STMPE pins
262 	struct stmpe_variant_info *variant = stmpe->variant;  in stmpe_set_altfunc()
263 	u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB];  in stmpe_set_altfunc()
264 	int af_bits = variant->af_bits;  in stmpe_set_altfunc()
265 	int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8);  in stmpe_set_altfunc()
266 	int mask = (1 << af_bits) - 1;  in stmpe_set_altfunc()
270 	if (!variant->get_altfunc)  in stmpe_set_altfunc()
274 	mutex_lock(&stmpe->lock);  in stmpe_set_altfunc()
284 	af = variant->get_altfunc(stmpe, block);  in stmpe_set_altfunc()
288 		int regoffset = numregs - (pin / afperreg) - 1;  in stmpe_set_altfunc()
300 	mutex_unlock(&stmpe->lock);  in stmpe_set_altfunc()
317 	.name		= "stmpe-gpio",
318 	.of_compatible	= "st,stmpe-gpio",
324 	.name		= "stmpe-gpio",
325 	.of_compatible	= "st,stmpe-gpio",
346 	.name		= "stmpe-keypad",
347 	.of_compatible  = "st,stmpe-keypad",
372 	.name		= "stmpe-pwm",
373 	.of_compatible  = "st,stmpe-pwm",
414 		return -EINVAL;  in stmpe801_enable()
457 	.name		= "stmpe-ts",
458 	.of_compatible	= "st,stmpe-ts",
464  * ADC (STMPE811)
480 	.name		= "stmpe-adc",
481 	.of_compatible	= "st,stmpe-adc",
541 	return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2], mask,  in stmpe811_enable()
550 	adc_ctrl1 = STMPE_SAMPLE_TIME(stmpe->sample_time) |  in stmpe811_adc_common_init()
551 		    STMPE_MOD_12B(stmpe->mod_12b) |  in stmpe811_adc_common_init()
552 		    STMPE_REF_SEL(stmpe->ref_sel);  in stmpe811_adc_common_init()
559 		dev_err(stmpe->dev, "Could not setup ADC\n");  in stmpe811_adc_common_init()
564 			STMPE_ADC_FREQ(0xff), STMPE_ADC_FREQ(stmpe->adc_freq));  in stmpe811_adc_common_init()
566 		dev_err(stmpe->dev, "Could not setup ADC\n");  in stmpe811_adc_common_init()
648 		return -EINVAL;  in stmpe1600_enable()
733 	return -EINVAL;  in stmpe_round_timeout()
740 	if (!stmpe->variant->enable_autosleep)  in stmpe_autosleep()
741 		return -ENOSYS;  in stmpe_autosleep()
743 	mutex_lock(&stmpe->lock);  in stmpe_autosleep()
744 	ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout);  in stmpe_autosleep()
745 	mutex_unlock(&stmpe->lock);  in stmpe_autosleep()
761 		dev_err(stmpe->dev, "invalid timeout\n");  in stmpe1601_autosleep()
765 	ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2],  in stmpe1601_autosleep()
771 	return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2],  in stmpe1601_autosleep()
796 	return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], mask,  in stmpe1601_enable()
893 	u16 id_val = stmpe->variant->id_val;  in stmpe_reset()
899 		/* STMPE801 and STMPE610 use bit 1 of SYS_CTRL register */  in stmpe_reset()
902 		/* all other STMPE variant use bit 7 of SYS_CTRL register */  in stmpe_reset()
905 	ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL],  in stmpe_reset()
914 		ret = __stmpe_reg_read(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL]);  in stmpe_reset()
921 	return -EIO;  in stmpe_reset()
1010 	return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], mask,  in stmpe24xx_enable()
1071  * These devices can be connected in a 'no-irq' configuration - the irq pin
1073  * devices which support this configuration - the driver will fail probing
1083 	struct stmpe_variant_info *variant = stmpe->variant;  in stmpe_irq()
1084 	int num = DIV_ROUND_UP(variant->num_irqs, 8);  in stmpe_irq()
1090 	if (variant->id_val == STMPE801_ID ||  in stmpe_irq()
1091 	    variant->id_val == STMPE1600_ID) {  in stmpe_irq()
1092 		int base = irq_find_mapping(stmpe->domain, 0);  in stmpe_irq()
1098 	if (variant->id_val == STMPE1801_ID)  in stmpe_irq()
1099 		israddr = stmpe->regs[STMPE_IDX_ISR_LSB];  in stmpe_irq()
1101 		israddr = stmpe->regs[STMPE_IDX_ISR_MSB];  in stmpe_irq()
1108 		int bank = num - i - 1;  in stmpe_irq()
1112 		status &= stmpe->ier[bank];  in stmpe_irq()
1120 			int nestedirq = irq_find_mapping(stmpe->domain, line);  in stmpe_irq()
1136 	mutex_lock(&stmpe->irq_lock);  in stmpe_irq_lock()
1142 	struct stmpe_variant_info *variant = stmpe->variant;  in stmpe_irq_sync_unlock()
1143 	int num = DIV_ROUND_UP(variant->num_irqs, 8);  in stmpe_irq_sync_unlock()
1147 		u8 new = stmpe->ier[i];  in stmpe_irq_sync_unlock()
1148 		u8 old = stmpe->oldier[i];  in stmpe_irq_sync_unlock()
1153 		stmpe->oldier[i] = new;  in stmpe_irq_sync_unlock()
1154 		stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB + i], new);  in stmpe_irq_sync_unlock()
1157 	mutex_unlock(&stmpe->irq_lock);  in stmpe_irq_sync_unlock()
1163 	int offset = data->hwirq;  in stmpe_irq_mask()
1167 	stmpe->ier[regoffset] &= ~mask;  in stmpe_irq_mask()
1173 	int offset = data->hwirq;  in stmpe_irq_unmask()
1177 	stmpe->ier[regoffset] |= mask;  in stmpe_irq_unmask()
1191 	struct stmpe *stmpe = d->host_data;  in stmpe_irq_map()
1194 	if (stmpe->variant->id_val != STMPE801_ID)  in stmpe_irq_map()
1220 	int num_irqs = stmpe->variant->num_irqs;  in stmpe_irq_init()
1222 	stmpe->domain = irq_domain_add_simple(np, num_irqs, base,  in stmpe_irq_init()
1224 	if (!stmpe->domain) {  in stmpe_irq_init()
1225 		dev_err(stmpe->dev, "Failed to create irqdomain\n");  in stmpe_irq_init()
1226 		return -ENOSYS;  in stmpe_irq_init()
1234 	unsigned int irq_trigger = stmpe->pdata->irq_trigger;  in stmpe_chip_init()
1235 	int autosleep_timeout = stmpe->pdata->autosleep_timeout;  in stmpe_chip_init()
1236 	struct stmpe_variant_info *variant = stmpe->variant;  in stmpe_chip_init()
1242 	ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID],  in stmpe_chip_init()
1248 	if ((id & variant->id_mask) != variant->id_val) {  in stmpe_chip_init()
1249 		dev_err(stmpe->dev, "unknown chip id: %#x\n", id);  in stmpe_chip_init()
1250 		return -EINVAL;  in stmpe_chip_init()
1253 	dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id);  in stmpe_chip_init()
1255 	/* Disable all modules -- subdrivers should enable what they need. */  in stmpe_chip_init()
1264 	if (stmpe->irq >= 0) {  in stmpe_chip_init()
1286 	if (stmpe->pdata->autosleep) {  in stmpe_chip_init()
1292 	return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr);  in stmpe_chip_init()
1297 	return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1,  in stmpe_add_device()
1298 			       NULL, 0, stmpe->domain);  in stmpe_add_device()
1303 	struct stmpe_variant_info *variant = stmpe->variant;  in stmpe_devices_init()
1304 	unsigned int platform_blocks = stmpe->pdata->blocks;  in stmpe_devices_init()
1305 	int ret = -EINVAL;  in stmpe_devices_init()
1308 	for (i = 0; i < variant->num_blocks; i++) {  in stmpe_devices_init()
1309 		struct stmpe_variant_block *block = &variant->blocks[i];  in stmpe_devices_init()
1311 		if (!(platform_blocks & block->block))  in stmpe_devices_init()
1314 		for (j = 0; j < block->cell->num_resources; j++) {  in stmpe_devices_init()
1315 			struct resource *res =  in stmpe_devices_init()  local
1316 				(struct resource *) &block->cell->resources[j];  in stmpe_devices_init()
1319 			if (res->flags & IORESOURCE_IRQ)  in stmpe_devices_init()
1320 				res->start = res->end = block->irq + j;  in stmpe_devices_init()
1323 		platform_blocks &= ~block->block;  in stmpe_devices_init()
1324 		ret = stmpe_add_device(stmpe, block->cell);  in stmpe_devices_init()
1330 		dev_warn(stmpe->dev,  in stmpe_devices_init()
1342 	pdata->id = of_alias_get_id(np, "stmpe-i2c");  in stmpe_of_probe()
1343 	if (pdata->id < 0)  in stmpe_of_probe()
1344 		pdata->id = -1;  in stmpe_of_probe()
1346 	of_property_read_u32(np, "st,autosleep-timeout",  in stmpe_of_probe()
1347 			&pdata->autosleep_timeout);  in stmpe_of_probe()
1349 	pdata->autosleep = (pdata->autosleep_timeout) ? true : false;  in stmpe_of_probe()
1353 			pdata->blocks |= STMPE_BLOCK_GPIO;  in stmpe_of_probe()
1355 			pdata->blocks |= STMPE_BLOCK_KEYPAD;  in stmpe_of_probe()
1357 			pdata->blocks |= STMPE_BLOCK_TOUCHSCREEN;  in stmpe_of_probe()
1359 			pdata->blocks |= STMPE_BLOCK_ADC;  in stmpe_of_probe()
1361 			pdata->blocks |= STMPE_BLOCK_PWM;  in stmpe_of_probe()
1369 	struct device_node *np = ci->dev->of_node;  in stmpe_probe()
1375 	pdata = devm_kzalloc(ci->dev, sizeof(*pdata), GFP_KERNEL);  in stmpe_probe()
1377 		return -ENOMEM;  in stmpe_probe()
1382 		ci->irq = -1;  in stmpe_probe()
1384 	stmpe = devm_kzalloc(ci->dev, sizeof(struct stmpe), GFP_KERNEL);  in stmpe_probe()
1386 		return -ENOMEM;  in stmpe_probe()
1388 	mutex_init(&stmpe->irq_lock);  in stmpe_probe()
1389 	mutex_init(&stmpe->lock);  in stmpe_probe()
1391 	if (!of_property_read_u32(np, "st,sample-time", &val))  in stmpe_probe()
1392 		stmpe->sample_time = val;  in stmpe_probe()
1393 	if (!of_property_read_u32(np, "st,mod-12b", &val))  in stmpe_probe()
1394 		stmpe->mod_12b = val;  in stmpe_probe()
1395 	if (!of_property_read_u32(np, "st,ref-sel", &val))  in stmpe_probe()
1396 		stmpe->ref_sel = val;  in stmpe_probe()
1397 	if (!of_property_read_u32(np, "st,adc-freq", &val))  in stmpe_probe()
1398 		stmpe->adc_freq = val;  in stmpe_probe()
1400 	stmpe->dev = ci->dev;  in stmpe_probe()
1401 	stmpe->client = ci->client;  in stmpe_probe()
1402 	stmpe->pdata = pdata;  in stmpe_probe()
1403 	stmpe->ci = ci;  in stmpe_probe()
1404 	stmpe->partnum = partnum;  in stmpe_probe()
1405 	stmpe->variant = stmpe_variant_info[partnum];  in stmpe_probe()
1406 	stmpe->regs = stmpe->variant->regs;  in stmpe_probe()
1407 	stmpe->num_gpios = stmpe->variant->num_gpios;  in stmpe_probe()
1408 	stmpe->vcc = devm_regulator_get_optional(ci->dev, "vcc");  in stmpe_probe()
1409 	if (!IS_ERR(stmpe->vcc)) {  in stmpe_probe()
1410 		ret = regulator_enable(stmpe->vcc);  in stmpe_probe()
1412 			dev_warn(ci->dev, "failed to enable VCC supply\n");  in stmpe_probe()
1414 	stmpe->vio = devm_regulator_get_optional(ci->dev, "vio");  in stmpe_probe()
1415 	if (!IS_ERR(stmpe->vio)) {  in stmpe_probe()
1416 		ret = regulator_enable(stmpe->vio);  in stmpe_probe()
1418 			dev_warn(ci->dev, "failed to enable VIO supply\n");  in stmpe_probe()
1420 	dev_set_drvdata(stmpe->dev, stmpe);  in stmpe_probe()
1422 	if (ci->init)  in stmpe_probe()
1423 		ci->init(stmpe);  in stmpe_probe()
1425 	irq_gpio = devm_gpiod_get_optional(ci->dev, "irq", GPIOD_ASIS);  in stmpe_probe()
1428 		dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n", ret);  in stmpe_probe()
1433 		stmpe->irq = gpiod_to_irq(irq_gpio);  in stmpe_probe()
1434 		pdata->irq_trigger = gpiod_is_active_low(irq_gpio) ?  in stmpe_probe()
1437 		stmpe->irq = ci->irq;  in stmpe_probe()
1438 		pdata->irq_trigger = IRQF_TRIGGER_NONE;  in stmpe_probe()
1441 	if (stmpe->irq < 0) {  in stmpe_probe()
1442 		/* use alternate variant info for no-irq mode, if supported */  in stmpe_probe()
1443 		dev_info(stmpe->dev,  in stmpe_probe()
1444 			"%s configured in no-irq mode by platform data\n",  in stmpe_probe()
1445 			stmpe->variant->name);  in stmpe_probe()
1446 		if (!stmpe_noirq_variant_info[stmpe->partnum]) {  in stmpe_probe()
1447 			dev_err(stmpe->dev,  in stmpe_probe()
1448 				"%s does not support no-irq mode!\n",  in stmpe_probe()
1449 				stmpe->variant->name);  in stmpe_probe()
1450 			return -ENODEV;  in stmpe_probe()
1452 		stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum];  in stmpe_probe()
1453 	} else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) {  in stmpe_probe()
1454 		pdata->irq_trigger = irq_get_trigger_type(stmpe->irq);  in stmpe_probe()
1461 	if (stmpe->irq >= 0) {  in stmpe_probe()
1466 		ret = devm_request_threaded_irq(ci->dev, stmpe->irq, NULL,  in stmpe_probe()
1467 				stmpe_irq, pdata->irq_trigger | IRQF_ONESHOT,  in stmpe_probe()
1470 			dev_err(stmpe->dev, "failed to request IRQ: %d\n",  in stmpe_probe()
1480 	dev_err(stmpe->dev, "failed to add children\n");  in stmpe_probe()
1481 	mfd_remove_devices(stmpe->dev);  in stmpe_probe()
1488 	if (!IS_ERR(stmpe->vio) && regulator_is_enabled(stmpe->vio))  in stmpe_remove()
1489 		regulator_disable(stmpe->vio);  in stmpe_remove()
1490 	if (!IS_ERR(stmpe->vcc) && regulator_is_enabled(stmpe->vcc))  in stmpe_remove()
1491 		regulator_disable(stmpe->vcc);  in stmpe_remove()
1495 	mfd_remove_devices(stmpe->dev);  in stmpe_remove()
1502 	if (stmpe->irq >= 0 && device_may_wakeup(dev))  in stmpe_suspend()
1503 		enable_irq_wake(stmpe->irq);  in stmpe_suspend()
1512 	if (stmpe->irq >= 0 && device_may_wakeup(dev))  in stmpe_resume()
1513 		disable_irq_wake(stmpe->irq);  in stmpe_resume()