^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) * ON pin driver for Dialog DA9052 PMICs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright(c) 2012 Dialog Semiconductor Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: David Dajun Chen <dchen@diasemi.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/workqueue.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mfd/da9052/da9052.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/mfd/da9052/reg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct da9052_onkey {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct da9052 *da9052;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct delayed_work work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static void da9052_onkey_query(struct da9052_onkey *onkey)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) ret = da9052_reg_read(onkey->da9052, DA9052_STATUS_A_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) dev_err(onkey->da9052->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) "Failed to read onkey event err=%d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * Since interrupt for deassertion of ONKEY pin is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * generated, onkey event state determines the onkey
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * button state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) bool pressed = !(ret & DA9052_STATUSA_NONKEY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) input_report_key(onkey->input, KEY_POWER, pressed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) input_sync(onkey->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * Interrupt is generated only when the ONKEY pin
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * is asserted. Hence the deassertion of the pin
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * is simulated through work queue.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (pressed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) schedule_delayed_work(&onkey->work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) msecs_to_jiffies(50));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void da9052_onkey_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct da9052_onkey *onkey = container_of(work, struct da9052_onkey,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) work.work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) da9052_onkey_query(onkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static irqreturn_t da9052_onkey_irq(int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) struct da9052_onkey *onkey = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) da9052_onkey_query(onkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return IRQ_HANDLED;
^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 da9052_onkey_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 da9052 *da9052 = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) struct da9052_onkey *onkey;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (!da9052) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) dev_err(&pdev->dev, "Failed to get the driver's data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) onkey = kzalloc(sizeof(*onkey), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) input_dev = input_allocate_device();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (!onkey || !input_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) dev_err(&pdev->dev, "Failed to allocate memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) goto err_free_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) onkey->input = input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) onkey->da9052 = da9052;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) INIT_DELAYED_WORK(&onkey->work, da9052_onkey_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) input_dev->name = "da9052-onkey";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) input_dev->phys = "da9052-onkey/input0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) input_dev->dev.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) input_dev->evbit[0] = BIT_MASK(EV_KEY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) __set_bit(KEY_POWER, input_dev->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) error = da9052_request_irq(onkey->da9052, DA9052_IRQ_NONKEY, "ONKEY",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) da9052_onkey_irq, onkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) dev_err(onkey->da9052->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) "Failed to register ONKEY IRQ: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) goto err_free_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) error = input_register_device(onkey->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) dev_err(&pdev->dev, "Unable to register input device, %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) goto err_free_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) platform_set_drvdata(pdev, onkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) err_free_irq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) da9052_free_irq(onkey->da9052, DA9052_IRQ_NONKEY, onkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) cancel_delayed_work_sync(&onkey->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) err_free_mem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) input_free_device(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) kfree(onkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static int da9052_onkey_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) struct da9052_onkey *onkey = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) da9052_free_irq(onkey->da9052, DA9052_IRQ_NONKEY, onkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) cancel_delayed_work_sync(&onkey->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) input_unregister_device(onkey->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) kfree(onkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static struct platform_driver da9052_onkey_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) .probe = da9052_onkey_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) .remove = da9052_onkey_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) .name = "da9052-onkey",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) module_platform_driver(da9052_onkey_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) MODULE_DESCRIPTION("Onkey driver for DA9052");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) MODULE_ALIAS("platform:da9052-onkey");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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