1 // SPDX-License-Identifier: GPL-2.0
15 /* EIC registers definition */
27  * The PMIC EIC controller only has one bank, and each bank now can contain
33 #define SPRD_PMIC_EIC_BIT(x)		((x) & (SPRD_PMIC_EIC_PER_BANK_NR - 1))
48  * struct sprd_pmic_eic - PMIC EIC controller
51  * @offset: the EIC controller's offset address of the PMIC.
52  * @reg: the array to cache the EIC registers.
53  * @buslock: for bus lock/sync and unlock.
54  * @irq: the interrupt number of the PMIC EIC conteroller.
71 	regmap_update_bits(pmic_eic->map, pmic_eic->offset + reg,  in sprd_pmic_eic_update()
82 	ret = regmap_read(pmic_eic->map, pmic_eic->offset + reg, &value);  in sprd_pmic_eic_read()
127 	ret = regmap_read(pmic_eic->map, pmic_eic->offset + reg, &value);  in sprd_pmic_eic_set_debounce()
133 	return regmap_write(pmic_eic->map, pmic_eic->offset + reg, value);  in sprd_pmic_eic_set_debounce()
145 	return -ENOTSUPP;  in sprd_pmic_eic_set_config()
154 	pmic_eic->reg[REG_IE] = 0;  in sprd_pmic_eic_irq_mask()
155 	pmic_eic->reg[REG_TRIG] = 0;  in sprd_pmic_eic_irq_mask()
168 	pmic_eic->reg[REG_IE] = 1;  in sprd_pmic_eic_irq_unmask()
169 	pmic_eic->reg[REG_TRIG] = 1;  in sprd_pmic_eic_irq_unmask()
180 		pmic_eic->reg[REG_IEV] = 1;  in sprd_pmic_eic_irq_set_type()
183 		pmic_eic->reg[REG_IEV] = 0;  in sprd_pmic_eic_irq_set_type()
189 		 * Will set the trigger level according to current EIC level  in sprd_pmic_eic_irq_set_type()
194 		return -ENOTSUPP;  in sprd_pmic_eic_irq_set_type()
205 	mutex_lock(&pmic_eic->buslock);  in sprd_pmic_eic_bus_lock()
225 				     pmic_eic->reg[REG_IEV]);  in sprd_pmic_eic_bus_sync_unlock()
230 			     pmic_eic->reg[REG_IE]);  in sprd_pmic_eic_bus_sync_unlock()
231 	/* Generate trigger start pulse for debounce EIC */  in sprd_pmic_eic_bus_sync_unlock()
233 			     pmic_eic->reg[REG_TRIG]);  in sprd_pmic_eic_bus_sync_unlock()
235 	mutex_unlock(&pmic_eic->buslock);  in sprd_pmic_eic_bus_sync_unlock()
256 		dev_warn(chip->parent, "PMIC EIC level was changed.\n");  in sprd_pmic_eic_toggle_trigger()
263 	/* Generate trigger start pulse for debounce EIC */  in sprd_pmic_eic_toggle_trigger()
270 	struct gpio_chip *chip = &pmic_eic->chip;  in sprd_pmic_eic_irq_handler()
275 	ret = regmap_read(pmic_eic->map, pmic_eic->offset + SPRD_PMIC_EIC_MIS,  in sprd_pmic_eic_irq_handler()
282 	for_each_set_bit(n, &status, chip->ngpio) {  in sprd_pmic_eic_irq_handler()
286 		girq = irq_find_mapping(chip->irq.domain, n);  in sprd_pmic_eic_irq_handler()
290 		 * The PMIC EIC can only support level trigger, so we can  in sprd_pmic_eic_irq_handler()
300 	.name			= "sprd-pmic-eic",
316 	pmic_eic = devm_kzalloc(&pdev->dev, sizeof(*pmic_eic), GFP_KERNEL);  in sprd_pmic_eic_probe()
318 		return -ENOMEM;  in sprd_pmic_eic_probe()
320 	mutex_init(&pmic_eic->buslock);  in sprd_pmic_eic_probe()
322 	pmic_eic->irq = platform_get_irq(pdev, 0);  in sprd_pmic_eic_probe()
323 	if (pmic_eic->irq < 0)  in sprd_pmic_eic_probe()
324 		return pmic_eic->irq;  in sprd_pmic_eic_probe()
326 	pmic_eic->map = dev_get_regmap(pdev->dev.parent, NULL);  in sprd_pmic_eic_probe()
327 	if (!pmic_eic->map)  in sprd_pmic_eic_probe()
328 		return -ENODEV;  in sprd_pmic_eic_probe()
330 	ret = of_property_read_u32(pdev->dev.of_node, "reg", &pmic_eic->offset);  in sprd_pmic_eic_probe()
332 		dev_err(&pdev->dev, "Failed to get PMIC EIC base address.\n");  in sprd_pmic_eic_probe()
336 	ret = devm_request_threaded_irq(&pdev->dev, pmic_eic->irq, NULL,  in sprd_pmic_eic_probe()
339 					dev_name(&pdev->dev), pmic_eic);  in sprd_pmic_eic_probe()
341 		dev_err(&pdev->dev, "Failed to request PMIC EIC IRQ.\n");  in sprd_pmic_eic_probe()
345 	pmic_eic->chip.label = dev_name(&pdev->dev);  in sprd_pmic_eic_probe()
346 	pmic_eic->chip.ngpio = SPRD_PMIC_EIC_NR;  in sprd_pmic_eic_probe()
347 	pmic_eic->chip.base = -1;  in sprd_pmic_eic_probe()
348 	pmic_eic->chip.parent = &pdev->dev;  in sprd_pmic_eic_probe()
349 	pmic_eic->chip.direction_input = sprd_pmic_eic_direction_input;  in sprd_pmic_eic_probe()
350 	pmic_eic->chip.request = sprd_pmic_eic_request;  in sprd_pmic_eic_probe()
351 	pmic_eic->chip.free = sprd_pmic_eic_free;  in sprd_pmic_eic_probe()
352 	pmic_eic->chip.set_config = sprd_pmic_eic_set_config;  in sprd_pmic_eic_probe()
353 	pmic_eic->chip.set = sprd_pmic_eic_set;  in sprd_pmic_eic_probe()
354 	pmic_eic->chip.get = sprd_pmic_eic_get;  in sprd_pmic_eic_probe()
355 	pmic_eic->chip.can_sleep = true;  in sprd_pmic_eic_probe()
357 	irq = &pmic_eic->chip.irq;  in sprd_pmic_eic_probe()
359 	irq->threaded = true;  in sprd_pmic_eic_probe()
361 	ret = devm_gpiochip_add_data(&pdev->dev, &pmic_eic->chip, pmic_eic);  in sprd_pmic_eic_probe()
363 		dev_err(&pdev->dev, "Could not register gpiochip %d.\n", ret);  in sprd_pmic_eic_probe()
371 	{ .compatible = "sprd,sc2731-eic", },
379 		.name = "sprd-pmic-eic",
386 MODULE_DESCRIPTION("Spreadtrum PMIC EIC driver");