Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Keypad driver for Analog Devices ADP5520 MFD PMICs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright 2009 Analog Devices Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/mfd/adp5520.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) struct adp5520_keys {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	struct notifier_block notifier;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	struct device *master;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	unsigned short keycode[ADP5520_KEYMAPSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) static void adp5520_keys_report_event(struct adp5520_keys *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 					unsigned short keymask, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	for (i = 0; i < ADP5520_MAXKEYS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		if (keymask & (1 << i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 			input_report_key(dev->input, dev->keycode[i], value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	input_sync(dev->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) static int adp5520_keys_notifier(struct notifier_block *nb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 				 unsigned long event, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	struct adp5520_keys *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	uint8_t reg_val_lo, reg_val_hi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	unsigned short keymask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	dev = container_of(nb, struct adp5520_keys, notifier);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	if (event & ADP5520_KP_INT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, &reg_val_lo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_val_hi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		keymask = (reg_val_hi << 8) | reg_val_lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		/* Read twice to clear */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		adp5520_read(dev->master, ADP5520_KP_INT_STAT_1, &reg_val_lo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		adp5520_read(dev->master, ADP5520_KP_INT_STAT_2, &reg_val_hi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		keymask |= (reg_val_hi << 8) | reg_val_lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 		adp5520_keys_report_event(dev, keymask, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	if (event & ADP5520_KR_INT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, &reg_val_lo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 		adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_val_hi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		keymask = (reg_val_hi << 8) | reg_val_lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		/* Read twice to clear */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		adp5520_read(dev->master, ADP5520_KR_INT_STAT_1, &reg_val_lo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		adp5520_read(dev->master, ADP5520_KR_INT_STAT_2, &reg_val_hi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		keymask |= (reg_val_hi << 8) | reg_val_lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		adp5520_keys_report_event(dev, keymask, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) static int adp5520_keys_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct adp5520_keys_platform_data *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct adp5520_keys *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	int ret, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	unsigned char en_mask, ctl_mask = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	if (pdev->id != ID_ADP5520) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		dev_err(&pdev->dev, "only ADP5520 supports Keypad\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	if (!pdata) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		dev_err(&pdev->dev, "missing platform data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	if (!(pdata->rows_en_mask && pdata->cols_en_mask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	if (!dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		dev_err(&pdev->dev, "failed to alloc memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	input = devm_input_allocate_device(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	if (!input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	dev->master = pdev->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	dev->input = input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	input->name = pdev->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	input->phys = "adp5520-keys/input0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	input->dev.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	input->id.bustype = BUS_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	input->id.vendor = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	input->id.product = 0x5520;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	input->id.version = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	input->keycodesize = sizeof(dev->keycode[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	input->keycodemax = pdata->keymapsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	input->keycode = dev->keycode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	memcpy(dev->keycode, pdata->keymap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		pdata->keymapsize * input->keycodesize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	/* setup input device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	__set_bit(EV_KEY, input->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	if (pdata->repeat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		__set_bit(EV_REP, input->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	for (i = 0; i < input->keycodemax; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		__set_bit(dev->keycode[i], input->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	__clear_bit(KEY_RESERVED, input->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	ret = input_register_device(input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		dev_err(&pdev->dev, "unable to register input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	en_mask = pdata->rows_en_mask | pdata->cols_en_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	ret = adp5520_set_bits(dev->master, ADP5520_GPIO_CFG_1, en_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	if (en_mask & ADP5520_COL_C3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		ctl_mask |= ADP5520_C3_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	if (en_mask & ADP5520_ROW_R3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		ctl_mask |= ADP5520_R3_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	if (ctl_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		ret |= adp5520_set_bits(dev->master, ADP5520_LED_CONTROL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 			ctl_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_PULLUP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		pdata->rows_en_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		dev_err(&pdev->dev, "failed to write\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	dev->notifier.notifier_call = adp5520_keys_notifier;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	ret = adp5520_register_notifier(dev->master, &dev->notifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			ADP5520_KP_IEN | ADP5520_KR_IEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		dev_err(&pdev->dev, "failed to register notifier\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	platform_set_drvdata(pdev, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static int adp5520_keys_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	struct adp5520_keys *dev = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	adp5520_unregister_notifier(dev->master, &dev->notifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 				ADP5520_KP_IEN | ADP5520_KR_IEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static struct platform_driver adp5520_keys_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	.driver	= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		.name	= "adp5520-keys",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	.probe		= adp5520_keys_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	.remove		= adp5520_keys_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) module_platform_driver(adp5520_keys_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) MODULE_DESCRIPTION("Keys ADP5520 Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) MODULE_ALIAS("platform:adp5520-keys");