1 // SPDX-License-Identifier: GPL-2.0
3  * GPIO library for the ACCES IDIO-16 family
18 #include "gpio-idio-16.h"
34 	struct regmap *map;  member
35 	unsigned int irq_mask;
38 static int idio_16_handle_mask_sync(const int index, const unsigned int mask_buf_def,  in idio_16_handle_mask_sync()
39 				    const unsigned int mask_buf, void *const irq_drv_data)  in idio_16_handle_mask_sync()
42 	const unsigned int prev_mask = data->irq_mask;  in idio_16_handle_mask_sync()
43 	int err;  in idio_16_handle_mask_sync()
44 	unsigned int val;  in idio_16_handle_mask_sync()
46 	/* exit early if no change since the previous mask */  in idio_16_handle_mask_sync()
50 	/* remember the current mask for the next mask sync */  in idio_16_handle_mask_sync()
51 	data->irq_mask = mask_buf;  in idio_16_handle_mask_sync()
55 		err = regmap_write(data->map, IDIO_16_CLEAR_INTERRUPT, 0x00);  in idio_16_handle_mask_sync()
58 		return regmap_read(data->map, IDIO_16_ENABLE_IRQ, &val);  in idio_16_handle_mask_sync()
63 		return regmap_write(data->map, IDIO_16_DISABLE_IRQ, 0x00);  in idio_16_handle_mask_sync()
68 static int idio_16_reg_mask_xlate(struct gpio_regmap *const gpio, const unsigned int base,  in idio_16_reg_mask_xlate()
69 				  const unsigned int offset, unsigned int *const reg,  in idio_16_reg_mask_xlate()
70 				  unsigned int *const mask)  in idio_16_reg_mask_xlate()  argument
72 	unsigned int stride;  in idio_16_reg_mask_xlate()
79 		stride = (offset - 16) / IDIO_16_NGPIO_PER_REG;  in idio_16_reg_mask_xlate()
83 	*mask = BIT(offset % IDIO_16_NGPIO_PER_REG);  in idio_16_reg_mask_xlate()
96  * devm_idio_16_regmap_register - Register an IDIO-16 GPIO device
97  * @dev:	device that is registering this IDIO-16 GPIO device
100  * Registers an IDIO-16 GPIO device. Returns 0 on success and negative error number on failure.
102 int devm_idio_16_regmap_register(struct device *const dev,  in devm_idio_16_regmap_register()
106 	int err;  in devm_idio_16_regmap_register()
111 	if (!config->parent)  in devm_idio_16_regmap_register()
112 		return -EINVAL;  in devm_idio_16_regmap_register()
114 	if (!config->map)  in devm_idio_16_regmap_register()
115 		return -EINVAL;  in devm_idio_16_regmap_register()
117 	if (!config->regmap_irqs)  in devm_idio_16_regmap_register()
118 		return -EINVAL;  in devm_idio_16_regmap_register()
122 		return -ENOMEM;  in devm_idio_16_regmap_register()
123 	data->map = config->map;  in devm_idio_16_regmap_register()
127 		return -ENOMEM;  in devm_idio_16_regmap_register()
129 	chip->name = dev_name(dev);  in devm_idio_16_regmap_register()
130 	chip->status_base = IDIO_16_INTERRUPT_STATUS;  in devm_idio_16_regmap_register()
131 	chip->mask_base = IDIO_16_ENABLE_IRQ;  in devm_idio_16_regmap_register()
132 	chip->ack_base = IDIO_16_CLEAR_INTERRUPT;  in devm_idio_16_regmap_register()
133 	chip->no_status = config->no_status;  in devm_idio_16_regmap_register()
134 	chip->num_regs = 1;  in devm_idio_16_regmap_register()
135 	chip->irqs = config->regmap_irqs;  in devm_idio_16_regmap_register()
136 	chip->num_irqs = config->num_regmap_irqs;  in devm_idio_16_regmap_register()
137 	chip->handle_mask_sync = idio_16_handle_mask_sync;  in devm_idio_16_regmap_register()
138 	chip->irq_drv_data = data;  in devm_idio_16_regmap_register()
141 	err = regmap_write(data->map, IDIO_16_DISABLE_IRQ, 0x00);  in devm_idio_16_regmap_register()
145 	err = devm_regmap_add_irq_chip(dev, data->map, config->irq, 0, 0, chip, &chip_data);  in devm_idio_16_regmap_register()
149 	if (config->filters) {  in devm_idio_16_regmap_register()
151 		err = regmap_write(data->map, IDIO_16_DEACTIVATE_INPUT_FILTERS, 0x00);  in devm_idio_16_regmap_register()
156 	gpio_config.parent = config->parent;  in devm_idio_16_regmap_register()
157 	gpio_config.regmap = data->map;  in devm_idio_16_regmap_register()
172 MODULE_DESCRIPTION("ACCES IDIO-16 GPIO Library");