^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Driver for Motorola PCAP2 touchscreen as found in the EZX phone platform.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2006 Harald Welte <laforge@openezx.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2009 Daniel Ribeiro <drwyrm@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mfd/ezx-pcap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct pcap_ts {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct pcap_chip *pcap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct input_dev *input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct delayed_work work;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) u16 x, y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) u16 pressure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) u8 read_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define SAMPLE_DELAY 20 /* msecs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define X_AXIS_MIN 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define X_AXIS_MAX 1023
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define Y_AXIS_MAX X_AXIS_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define Y_AXIS_MIN X_AXIS_MIN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define PRESSURE_MAX X_AXIS_MAX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #define PRESSURE_MIN X_AXIS_MIN
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static void pcap_ts_read_xy(void *data, u16 res[2])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct pcap_ts *pcap_ts = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) switch (pcap_ts->read_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) case PCAP_ADC_TS_M_PRESSURE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* pressure reading is unreliable */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) if (res[0] > PRESSURE_MIN && res[0] < PRESSURE_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) pcap_ts->pressure = res[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) pcap_ts->read_state = PCAP_ADC_TS_M_XY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) schedule_delayed_work(&pcap_ts->work, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) case PCAP_ADC_TS_M_XY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) pcap_ts->y = res[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) pcap_ts->x = res[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (pcap_ts->x <= X_AXIS_MIN || pcap_ts->x >= X_AXIS_MAX ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) pcap_ts->y <= Y_AXIS_MIN || pcap_ts->y >= Y_AXIS_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* pen has been released */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) input_report_abs(pcap_ts->input, ABS_PRESSURE, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) input_report_key(pcap_ts->input, BTN_TOUCH, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) pcap_ts->read_state = PCAP_ADC_TS_M_STANDBY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) schedule_delayed_work(&pcap_ts->work, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* pen is touching the screen */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) input_report_abs(pcap_ts->input, ABS_X, pcap_ts->x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) input_report_abs(pcap_ts->input, ABS_Y, pcap_ts->y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) input_report_key(pcap_ts->input, BTN_TOUCH, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) input_report_abs(pcap_ts->input, ABS_PRESSURE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) pcap_ts->pressure);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* switch back to pressure read mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) pcap_ts->read_state = PCAP_ADC_TS_M_PRESSURE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) schedule_delayed_work(&pcap_ts->work,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) msecs_to_jiffies(SAMPLE_DELAY));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) input_sync(pcap_ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) dev_warn(&pcap_ts->input->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) "pcap_ts: Warning, unhandled read_state %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) pcap_ts->read_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) break;
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static void pcap_ts_work(struct work_struct *work)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct delayed_work *dw = to_delayed_work(work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct pcap_ts *pcap_ts = container_of(dw, struct pcap_ts, work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) u8 ch[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) pcap_set_ts_bits(pcap_ts->pcap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) pcap_ts->read_state << PCAP_ADC_TS_M_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) if (pcap_ts->read_state == PCAP_ADC_TS_M_STANDBY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) /* start adc conversion */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) ch[0] = PCAP_ADC_CH_TS_X1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) ch[1] = PCAP_ADC_CH_TS_Y1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) pcap_adc_async(pcap_ts->pcap, PCAP_ADC_BANK_1, 0, ch,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) pcap_ts_read_xy, pcap_ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static irqreturn_t pcap_ts_event_touch(int pirq, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct pcap_ts *pcap_ts = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (pcap_ts->read_state == PCAP_ADC_TS_M_STANDBY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) pcap_ts->read_state = PCAP_ADC_TS_M_PRESSURE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) schedule_delayed_work(&pcap_ts->work, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static int pcap_ts_open(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct pcap_ts *pcap_ts = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) pcap_ts->read_state = PCAP_ADC_TS_M_STANDBY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) schedule_delayed_work(&pcap_ts->work, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static void pcap_ts_close(struct input_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) struct pcap_ts *pcap_ts = input_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) cancel_delayed_work_sync(&pcap_ts->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) pcap_ts->read_state = PCAP_ADC_TS_M_NONTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) pcap_set_ts_bits(pcap_ts->pcap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) pcap_ts->read_state << PCAP_ADC_TS_M_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static int pcap_ts_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct pcap_ts *pcap_ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) int err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) pcap_ts = kzalloc(sizeof(*pcap_ts), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (!pcap_ts)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) pcap_ts->pcap = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) platform_set_drvdata(pdev, pcap_ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) input_dev = input_allocate_device();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (!input_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) INIT_DELAYED_WORK(&pcap_ts->work, pcap_ts_work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) pcap_ts->read_state = PCAP_ADC_TS_M_NONTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) pcap_set_ts_bits(pcap_ts->pcap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) pcap_ts->read_state << PCAP_ADC_TS_M_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) pcap_ts->input = input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) input_set_drvdata(input_dev, pcap_ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) input_dev->name = "pcap-touchscreen";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) input_dev->phys = "pcap_ts/input0";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) input_dev->id.bustype = BUS_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) input_dev->id.vendor = 0x0001;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) input_dev->id.product = 0x0002;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) input_dev->id.version = 0x0100;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) input_dev->dev.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) input_dev->open = pcap_ts_open;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) input_dev->close = pcap_ts_close;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) input_set_abs_params(input_dev, ABS_X, X_AXIS_MIN, X_AXIS_MAX, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) input_set_abs_params(input_dev, ABS_Y, Y_AXIS_MIN, Y_AXIS_MAX, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) input_set_abs_params(input_dev, ABS_PRESSURE, PRESSURE_MIN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) PRESSURE_MAX, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) err = input_register_device(pcap_ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) goto fail_allocate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) err = request_irq(pcap_to_irq(pcap_ts->pcap, PCAP_IRQ_TS),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) pcap_ts_event_touch, 0, "Touch Screen", pcap_ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) goto fail_register;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) fail_register:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) input_unregister_device(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) fail_allocate:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) input_free_device(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) kfree(pcap_ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static int pcap_ts_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) struct pcap_ts *pcap_ts = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) free_irq(pcap_to_irq(pcap_ts->pcap, PCAP_IRQ_TS), pcap_ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) cancel_delayed_work_sync(&pcap_ts->work);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) input_unregister_device(pcap_ts->input);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) kfree(pcap_ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static int pcap_ts_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) struct pcap_ts *pcap_ts = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) pcap_set_ts_bits(pcap_ts->pcap, PCAP_ADC_TS_REF_LOWPWR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static int pcap_ts_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) struct pcap_ts *pcap_ts = dev_get_drvdata(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) pcap_set_ts_bits(pcap_ts->pcap,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) pcap_ts->read_state << PCAP_ADC_TS_M_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) static const struct dev_pm_ops pcap_ts_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) .suspend = pcap_ts_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) .resume = pcap_ts_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) #define PCAP_TS_PM_OPS (&pcap_ts_pm_ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) #define PCAP_TS_PM_OPS NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static struct platform_driver pcap_ts_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) .probe = pcap_ts_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) .remove = pcap_ts_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) .name = "pcap-ts",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) .pm = PCAP_TS_PM_OPS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) module_platform_driver(pcap_ts_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) MODULE_DESCRIPTION("Motorola PCAP2 touchscreen driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) MODULE_AUTHOR("Daniel Ribeiro / Harald Welte");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) MODULE_ALIAS("platform:pcap_ts");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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