^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * MAX8925 ONKEY driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2009 Marvell International Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Haojian Zhuang <haojian.zhuang@marvell.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * This file is subject to the terms and conditions of the GNU General
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Public License. See the file "COPYING" in the main directory of this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * archive for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * This program is distributed in the hope that it will be useful,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * but WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * GNU General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * You should have received a copy of the GNU General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * along with this program; if not, write to the Free Software
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/mfd/max8925.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define SW_INPUT (1 << 7) /* 0/1 -- up/down */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define HARDRESET_EN (1 << 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define PWREN_EN (1 << 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct max8925_onkey_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct input_dev *idev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct i2c_client *i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct device *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) unsigned int irq[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * MAX8925 gives us an interrupt when ONKEY is pressed or released.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * max8925_set_bits() operates I2C bus and may sleep. So implement
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * it in thread IRQ handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static irqreturn_t max8925_onkey_handler(int irq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct max8925_onkey_info *info = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) state = max8925_reg_read(info->i2c, MAX8925_ON_OFF_STATUS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) input_report_key(info->idev, KEY_POWER, state & SW_INPUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) input_sync(info->idev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) dev_dbg(info->dev, "onkey state:%d\n", state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /* Enable hardreset to halt if system isn't shutdown on time */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) max8925_set_bits(info->i2c, MAX8925_SYSENSEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) HARDRESET_EN, HARDRESET_EN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static int max8925_onkey_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct max8925_onkey_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) int irq[2], error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) irq[0] = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) if (irq[0] < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) irq[1] = platform_get_irq(pdev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (irq[1] < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) info = devm_kzalloc(&pdev->dev, sizeof(struct max8925_onkey_info),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (!info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) input = devm_input_allocate_device(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (!input)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) info->idev = input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) info->i2c = chip->i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) info->dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) info->irq[0] = irq[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) info->irq[1] = irq[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) input->name = "max8925_on";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) input->phys = "max8925_on/input0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) input->id.bustype = BUS_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) input->dev.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) input_set_capability(input, EV_KEY, KEY_POWER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) error = devm_request_threaded_irq(&pdev->dev, irq[0], NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) max8925_onkey_handler, IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) "onkey-down", info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) irq[0], error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) error = devm_request_threaded_irq(&pdev->dev, irq[1], NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) max8925_onkey_handler, IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) "onkey-up", info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) irq[1], error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) error = input_register_device(info->idev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) dev_err(chip->dev, "Can't register input device: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) platform_set_drvdata(pdev, info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) device_init_wakeup(&pdev->dev, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) static int __maybe_unused max8925_onkey_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct max8925_onkey_info *info = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (device_may_wakeup(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) chip->wakeup_flag |= 1 << info->irq[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) chip->wakeup_flag |= 1 << info->irq[1];
^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) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static int __maybe_unused max8925_onkey_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct platform_device *pdev = to_platform_device(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) struct max8925_onkey_info *info = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (device_may_wakeup(dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) chip->wakeup_flag &= ~(1 << info->irq[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) chip->wakeup_flag &= ~(1 << info->irq[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) static SIMPLE_DEV_PM_OPS(max8925_onkey_pm_ops, max8925_onkey_suspend, max8925_onkey_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) static struct platform_driver max8925_onkey_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) .name = "max8925-onkey",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .pm = &max8925_onkey_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) .probe = max8925_onkey_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) module_platform_driver(max8925_onkey_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) MODULE_DESCRIPTION("Maxim MAX8925 ONKEY driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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