1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Keypad driver for Analog Devices ADP5520 MFD PMICs
  4 *
  5 * Copyright 2009 Analog Devices Inc.
 
 
  6 */
  7
  8#include <linux/module.h>
  9#include <linux/kernel.h>
 10#include <linux/platform_device.h>
 11#include <linux/input.h>
 12#include <linux/mfd/adp5520.h>
 13#include <linux/slab.h>
 14#include <linux/device.h>
 15
 16struct adp5520_keys {
 17	struct input_dev *input;
 18	struct notifier_block notifier;
 19	struct device *master;
 20	unsigned short keycode[ADP5520_KEYMAPSIZE];
 21};
 22
 23static void adp5520_keys_report_event(struct adp5520_keys *dev,
 24					unsigned short keymask, int value)
 25{
 26	int i;
 27
 28	for (i = 0; i < ADP5520_MAXKEYS; i++)
 29		if (keymask & (1 << i))
 30			input_report_key(dev->input, dev->keycode[i], value);
 31
 32	input_sync(dev->input);
 33}
 34
 35static int adp5520_keys_notifier(struct notifier_block *nb,
 36				 unsigned long event, void *data)
 37{
 38	struct adp5520_keys *dev;
 39	uint8_t reg_val_lo, reg_val_hi;
 40	unsigned short keymask;
 41
 42	dev = container_of(nb, struct adp5520_keys, notifier);
 43
 44	if (event & ADP5520_KP_INT) {
 45		adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, &reg_val_lo);
 46		adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_val_hi);
 47
 48		keymask = (reg_val_hi << 8) | reg_val_lo;
 49		/* Read twice to clear */
 50		adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, &reg_val_lo);
 51		adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_val_hi);
 52		keymask |= (reg_val_hi << 8) | reg_val_lo;
 53		adp5520_keys_report_event(dev, keymask, 1);
 54	}
 55
 56	if (event & ADP5520_KR_INT) {
 57		adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, &reg_val_lo);
 58		adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_val_hi);
 59
 60		keymask = (reg_val_hi << 8) | reg_val_lo;
 61		/* Read twice to clear */
 62		adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, &reg_val_lo);
 63		adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_val_hi);
 64		keymask |= (reg_val_hi << 8) | reg_val_lo;
 65		adp5520_keys_report_event(dev, keymask, 0);
 66	}
 67
 68	return 0;
 69}
 70
 71static int adp5520_keys_probe(struct platform_device *pdev)
 72{
 73	struct adp5520_keys_platform_data *pdata = dev_get_platdata(&pdev->dev);
 74	struct input_dev *input;
 75	struct adp5520_keys *dev;
 76	int ret, i;
 77	unsigned char en_mask, ctl_mask = 0;
 78
 79	if (pdev->id != ID_ADP5520) {
 80		dev_err(&pdev->dev, "only ADP5520 supports Keypad\n");
 81		return -EINVAL;
 82	}
 83
 84	if (!pdata) {
 85		dev_err(&pdev->dev, "missing platform data\n");
 86		return -EINVAL;
 87	}
 88
 89	if (!(pdata->rows_en_mask && pdata->cols_en_mask))
 90		return -EINVAL;
 91
 92	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 93	if (!dev) {
 94		dev_err(&pdev->dev, "failed to alloc memory\n");
 95		return -ENOMEM;
 96	}
 97
 98	input = devm_input_allocate_device(&pdev->dev);
 99	if (!input)
100		return -ENOMEM;
101
102	dev->master = pdev->dev.parent;
103	dev->input = input;
104
105	input->name = pdev->name;
106	input->phys = "adp5520-keys/input0";
107	input->dev.parent = &pdev->dev;
108
 
 
109	input->id.bustype = BUS_I2C;
110	input->id.vendor = 0x0001;
111	input->id.product = 0x5520;
112	input->id.version = 0x0001;
113
114	input->keycodesize = sizeof(dev->keycode[0]);
115	input->keycodemax = pdata->keymapsize;
116	input->keycode = dev->keycode;
117
118	memcpy(dev->keycode, pdata->keymap,
119		pdata->keymapsize * input->keycodesize);
120
121	/* setup input device */
122	__set_bit(EV_KEY, input->evbit);
123
124	if (pdata->repeat)
125		__set_bit(EV_REP, input->evbit);
126
127	for (i = 0; i < input->keycodemax; i++)
128		__set_bit(dev->keycode[i], input->keybit);
129	__clear_bit(KEY_RESERVED, input->keybit);
130
131	ret = input_register_device(input);
132	if (ret) {
133		dev_err(&pdev->dev, "unable to register input device\n");
134		return ret;
135	}
136
137	en_mask = pdata->rows_en_mask | pdata->cols_en_mask;
138
139	ret = adp5520_set_bits(dev->master, ADP5520_GPIO_CFG_1, en_mask);
140
141	if (en_mask & ADP5520_COL_C3)
142		ctl_mask |= ADP5520_C3_MODE;
143
144	if (en_mask & ADP5520_ROW_R3)
145		ctl_mask |= ADP5520_R3_MODE;
146
147	if (ctl_mask)
148		ret |= adp5520_set_bits(dev->master, ADP5520_LED_CONTROL,
149			ctl_mask);
150
151	ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_PULLUP,
152		pdata->rows_en_mask);
153
154	if (ret) {
155		dev_err(&pdev->dev, "failed to write\n");
156		return -EIO;
157	}
158
159	dev->notifier.notifier_call = adp5520_keys_notifier;
160	ret = adp5520_register_notifier(dev->master, &dev->notifier,
161			ADP5520_KP_IEN | ADP5520_KR_IEN);
162	if (ret) {
163		dev_err(&pdev->dev, "failed to register notifier\n");
164		return ret;
165	}
166
167	platform_set_drvdata(pdev, dev);
168	return 0;
169}
170
171static void adp5520_keys_remove(struct platform_device *pdev)
172{
173	struct adp5520_keys *dev = platform_get_drvdata(pdev);
174
175	adp5520_unregister_notifier(dev->master, &dev->notifier,
176				ADP5520_KP_IEN | ADP5520_KR_IEN);
 
 
177}
178
179static struct platform_driver adp5520_keys_driver = {
180	.driver	= {
181		.name	= "adp5520-keys",
182	},
183	.probe		= adp5520_keys_probe,
184	.remove_new	= adp5520_keys_remove,
185};
186module_platform_driver(adp5520_keys_driver);
187
188MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
189MODULE_DESCRIPTION("Keys ADP5520 Driver");
190MODULE_LICENSE("GPL");
191MODULE_ALIAS("platform:adp5520-keys");

 
  1/*
  2 * Keypad driver for Analog Devices ADP5520 MFD PMICs
  3 *
  4 * Copyright 2009 Analog Devices Inc.
  5 *
  6 * Licensed under the GPL-2 or later.
  7 */
  8
  9#include <linux/module.h>
 10#include <linux/kernel.h>
 11#include <linux/platform_device.h>
 12#include <linux/input.h>
 13#include <linux/mfd/adp5520.h>
 14#include <linux/slab.h>
 15#include <linux/device.h>
 16
 17struct adp5520_keys {
 18	struct input_dev *input;
 19	struct notifier_block notifier;
 20	struct device *master;
 21	unsigned short keycode[ADP5520_KEYMAPSIZE];
 22};
 23
 24static void adp5520_keys_report_event(struct adp5520_keys *dev,
 25					unsigned short keymask, int value)
 26{
 27	int i;
 28
 29	for (i = 0; i < ADP5520_MAXKEYS; i++)
 30		if (keymask & (1 << i))
 31			input_report_key(dev->input, dev->keycode[i], value);
 32
 33	input_sync(dev->input);
 34}
 35
 36static int adp5520_keys_notifier(struct notifier_block *nb,
 37				 unsigned long event, void *data)
 38{
 39	struct adp5520_keys *dev;
 40	uint8_t reg_val_lo, reg_val_hi;
 41	unsigned short keymask;
 42
 43	dev = container_of(nb, struct adp5520_keys, notifier);
 44
 45	if (event & ADP5520_KP_INT) {
 46		adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, &reg_val_lo);
 47		adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_val_hi);
 48
 49		keymask = (reg_val_hi << 8) | reg_val_lo;
 50		/* Read twice to clear */
 51		adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, &reg_val_lo);
 52		adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_val_hi);
 53		keymask |= (reg_val_hi << 8) | reg_val_lo;
 54		adp5520_keys_report_event(dev, keymask, 1);
 55	}
 56
 57	if (event & ADP5520_KR_INT) {
 58		adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, &reg_val_lo);
 59		adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_val_hi);
 60
 61		keymask = (reg_val_hi << 8) | reg_val_lo;
 62		/* Read twice to clear */
 63		adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, &reg_val_lo);
 64		adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_val_hi);
 65		keymask |= (reg_val_hi << 8) | reg_val_lo;
 66		adp5520_keys_report_event(dev, keymask, 0);
 67	}
 68
 69	return 0;
 70}
 71
 72static int adp5520_keys_probe(struct platform_device *pdev)
 73{
 74	struct adp5520_keys_platform_data *pdata = dev_get_platdata(&pdev->dev);
 75	struct input_dev *input;
 76	struct adp5520_keys *dev;
 77	int ret, i;
 78	unsigned char en_mask, ctl_mask = 0;
 79
 80	if (pdev->id != ID_ADP5520) {
 81		dev_err(&pdev->dev, "only ADP5520 supports Keypad\n");
 82		return -EINVAL;
 83	}
 84
 85	if (!pdata) {
 86		dev_err(&pdev->dev, "missing platform data\n");
 87		return -EINVAL;
 88	}
 89
 90	if (!(pdata->rows_en_mask && pdata->cols_en_mask))
 91		return -EINVAL;
 92
 93	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 94	if (!dev) {
 95		dev_err(&pdev->dev, "failed to alloc memory\n");
 96		return -ENOMEM;
 97	}
 98
 99	input = devm_input_allocate_device(&pdev->dev);
100	if (!input)
101		return -ENOMEM;
102
103	dev->master = pdev->dev.parent;
104	dev->input = input;
105
106	input->name = pdev->name;
107	input->phys = "adp5520-keys/input0";
108	input->dev.parent = &pdev->dev;
109
110	input_set_drvdata(input, dev);
111
112	input->id.bustype = BUS_I2C;
113	input->id.vendor = 0x0001;
114	input->id.product = 0x5520;
115	input->id.version = 0x0001;
116
117	input->keycodesize = sizeof(dev->keycode[0]);
118	input->keycodemax = pdata->keymapsize;
119	input->keycode = dev->keycode;
120
121	memcpy(dev->keycode, pdata->keymap,
122		pdata->keymapsize * input->keycodesize);
123
124	/* setup input device */
125	__set_bit(EV_KEY, input->evbit);
126
127	if (pdata->repeat)
128		__set_bit(EV_REP, input->evbit);
129
130	for (i = 0; i < input->keycodemax; i++)
131		__set_bit(dev->keycode[i], input->keybit);
132	__clear_bit(KEY_RESERVED, input->keybit);
133
134	ret = input_register_device(input);
135	if (ret) {
136		dev_err(&pdev->dev, "unable to register input device\n");
137		return ret;
138	}
139
140	en_mask = pdata->rows_en_mask | pdata->cols_en_mask;
141
142	ret = adp5520_set_bits(dev->master, ADP5520_GPIO_CFG_1, en_mask);
143
144	if (en_mask & ADP5520_COL_C3)
145		ctl_mask |= ADP5520_C3_MODE;
146
147	if (en_mask & ADP5520_ROW_R3)
148		ctl_mask |= ADP5520_R3_MODE;
149
150	if (ctl_mask)
151		ret |= adp5520_set_bits(dev->master, ADP5520_LED_CONTROL,
152			ctl_mask);
153
154	ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_PULLUP,
155		pdata->rows_en_mask);
156
157	if (ret) {
158		dev_err(&pdev->dev, "failed to write\n");
159		return -EIO;
160	}
161
162	dev->notifier.notifier_call = adp5520_keys_notifier;
163	ret = adp5520_register_notifier(dev->master, &dev->notifier,
164			ADP5520_KP_IEN | ADP5520_KR_IEN);
165	if (ret) {
166		dev_err(&pdev->dev, "failed to register notifier\n");
167		return ret;
168	}
169
170	platform_set_drvdata(pdev, dev);
171	return 0;
172}
173
174static int adp5520_keys_remove(struct platform_device *pdev)
175{
176	struct adp5520_keys *dev = platform_get_drvdata(pdev);
177
178	adp5520_unregister_notifier(dev->master, &dev->notifier,
179				ADP5520_KP_IEN | ADP5520_KR_IEN);
180
181	return 0;
182}
183
184static struct platform_driver adp5520_keys_driver = {
185	.driver	= {
186		.name	= "adp5520-keys",
187	},
188	.probe		= adp5520_keys_probe,
189	.remove		= adp5520_keys_remove,
190};
191module_platform_driver(adp5520_keys_driver);
192
193MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
194MODULE_DESCRIPTION("Keys ADP5520 Driver");
195MODULE_LICENSE("GPL");
196MODULE_ALIAS("platform:adp5520-keys");