Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Ksenija Stanojevic | 2768 | 99.32% | 1 | 16.67% |
Fabio Estevam | 9 | 0.32% | 1 | 16.67% |
Dan Carpenter | 3 | 0.11% | 1 | 16.67% |
Pan Bian | 3 | 0.11% | 1 | 16.67% |
Thomas Gleixner | 2 | 0.07% | 1 | 16.67% |
Wei Yongjun | 2 | 0.07% | 1 | 16.67% |
Total | 2787 | 6 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Freescale MXS LRADC touchscreen driver * * Copyright (c) 2012 DENX Software Engineering, GmbH. * Copyright (c) 2017 Ksenija Stanojevic <ksenija.stanojevic@gmail.com> * * Authors: * Marek Vasut <marex@denx.de> * Ksenija Stanojevic <ksenija.stanojevic@gmail.com> */ #include <linux/device.h> #include <linux/err.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/module.h> #include <linux/mfd/core.h> #include <linux/mfd/mxs-lradc.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/platform_device.h> static const char * const mxs_lradc_ts_irq_names[] = { "mxs-lradc-touchscreen", "mxs-lradc-channel6", "mxs-lradc-channel7", }; /* * Touchscreen handling */ enum mxs_lradc_ts_plate { LRADC_TOUCH = 0, LRADC_SAMPLE_X, LRADC_SAMPLE_Y, LRADC_SAMPLE_PRESSURE, LRADC_SAMPLE_VALID, }; struct mxs_lradc_ts { struct mxs_lradc *lradc; struct device *dev; void __iomem *base; /* * When the touchscreen is enabled, we give it two private virtual * channels: #6 and #7. This means that only 6 virtual channels (instead * of 8) will be available for buffered capture. */ #define TOUCHSCREEN_VCHANNEL1 7 #define TOUCHSCREEN_VCHANNEL2 6 struct input_dev *ts_input; enum mxs_lradc_ts_plate cur_plate; /* state machine */ bool ts_valid; unsigned int ts_x_pos; unsigned int ts_y_pos; unsigned int ts_pressure; /* handle touchscreen's physical behaviour */ /* samples per coordinate */ unsigned int over_sample_cnt; /* time clocks between samples */ unsigned int over_sample_delay; /* time in clocks to wait after the plates where switched */ unsigned int settling_delay; spinlock_t lock; }; struct state_info { u32 mask; u32 bit; u32 x_plate; u32 y_plate; u32 pressure; }; static struct state_info info[] = { {LRADC_CTRL0_MX23_PLATE_MASK, LRADC_CTRL0_MX23_TOUCH_DETECT_ENABLE, LRADC_CTRL0_MX23_XP | LRADC_CTRL0_MX23_XM, LRADC_CTRL0_MX23_YP | LRADC_CTRL0_MX23_YM, LRADC_CTRL0_MX23_YP | LRADC_CTRL0_MX23_XM}, {LRADC_CTRL0_MX28_PLATE_MASK, LRADC_CTRL0_MX28_TOUCH_DETECT_ENABLE, LRADC_CTRL0_MX28_XPPSW | LRADC_CTRL0_MX28_XNNSW, LRADC_CTRL0_MX28_YPPSW | LRADC_CTRL0_MX28_YNNSW, LRADC_CTRL0_MX28_YPPSW | LRADC_CTRL0_MX28_XNNSW} }; static bool mxs_lradc_check_touch_event(struct mxs_lradc_ts *ts) { return !!(readl(ts->base + LRADC_STATUS) & LRADC_STATUS_TOUCH_DETECT_RAW); } static void mxs_lradc_map_ts_channel(struct mxs_lradc_ts *ts, unsigned int vch, unsigned int ch) { writel(LRADC_CTRL4_LRADCSELECT_MASK(vch), ts->base + LRADC_CTRL4 + STMP_OFFSET_REG_CLR); writel(LRADC_CTRL4_LRADCSELECT(vch, ch), ts->base + LRADC_CTRL4 + STMP_OFFSET_REG_SET); } static void mxs_lradc_setup_ts_channel(struct mxs_lradc_ts *ts, unsigned int ch) { /* * prepare for oversampling conversion * * from the datasheet: * "The ACCUMULATE bit in the appropriate channel register * HW_LRADC_CHn must be set to 1 if NUM_SAMPLES is greater then 0; * otherwise, the IRQs will not fire." */ writel(LRADC_CH_ACCUMULATE | LRADC_CH_NUM_SAMPLES(ts->over_sample_cnt - 1), ts->base + LRADC_CH(ch)); /* from the datasheet: * "Software must clear this register in preparation for a * multi-cycle accumulation. */ writel(LRADC_CH_VALUE_MASK, ts->base + LRADC_CH(ch) + STMP_OFFSET_REG_CLR); /* * prepare the delay/loop unit according to the oversampling count * * from the datasheet: * "The DELAY fields in HW_LRADC_DELAY0, HW_LRADC_DELAY1, * HW_LRADC_DELAY2, and HW_LRADC_DELAY3 must be non-zero; otherwise, * the LRADC will not trigger the delay group." */ writel(LRADC_DELAY_TRIGGER(1 << ch) | LRADC_DELAY_TRIGGER_DELAYS(0) | LRADC_DELAY_LOOP(ts->over_sample_cnt - 1) | LRADC_DELAY_DELAY(ts->over_sample_delay - 1), ts->base + LRADC_DELAY(3)); writel(LRADC_CTRL1_LRADC_IRQ(ch), ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR); /* * after changing the touchscreen plates setting * the signals need some initial time to settle. Start the * SoC's delay unit and start the conversion later * and automatically. */ writel(LRADC_DELAY_TRIGGER(0) | LRADC_DELAY_TRIGGER_DELAYS(BIT(3)) | LRADC_DELAY_KICK | LRADC_DELAY_DELAY(ts->settling_delay), ts->base + LRADC_DELAY(2)); } /* * Pressure detection is special: * We want to do both required measurements for the pressure detection in * one turn. Use the hardware features to chain both conversions and let the * hardware report one interrupt if both conversions are done */ static void mxs_lradc_setup_ts_pressure(struct mxs_lradc_ts *ts, unsigned int ch1, unsigned int ch2) { u32 reg; /* * prepare for oversampling conversion * * from the datasheet: * "The ACCUMULATE bit in the appropriate channel register * HW_LRADC_CHn must be set to 1 if NUM_SAMPLES is greater then 0; * otherwise, the IRQs will not fire." */ reg = LRADC_CH_ACCUMULATE | LRADC_CH_NUM_SAMPLES(ts->over_sample_cnt - 1); writel(reg, ts->base + LRADC_CH(ch1)); writel(reg, ts->base + LRADC_CH(ch2)); /* from the datasheet: * "Software must clear this register in preparation for a * multi-cycle accumulation. */ writel(LRADC_CH_VALUE_MASK, ts->base + LRADC_CH(ch1) + STMP_OFFSET_REG_CLR); writel(LRADC_CH_VALUE_MASK, ts->base + LRADC_CH(ch2) + STMP_OFFSET_REG_CLR); /* prepare the delay/loop unit according to the oversampling count */ writel(LRADC_DELAY_TRIGGER(1 << ch1) | LRADC_DELAY_TRIGGER(1 << ch2) | LRADC_DELAY_TRIGGER_DELAYS(0) | LRADC_DELAY_LOOP(ts->over_sample_cnt - 1) | LRADC_DELAY_DELAY(ts->over_sample_delay - 1), ts->base + LRADC_DELAY(3)); writel(LRADC_CTRL1_LRADC_IRQ(ch2), ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR); /* * after changing the touchscreen plates setting * the signals need some initial time to settle. Start the * SoC's delay unit and start the conversion later * and automatically. */ writel(LRADC_DELAY_TRIGGER(0) | LRADC_DELAY_TRIGGER_DELAYS(BIT(3)) | LRADC_DELAY_KICK | LRADC_DELAY_DELAY(ts->settling_delay), ts->base + LRADC_DELAY(2)); } static unsigned int mxs_lradc_ts_read_raw_channel(struct mxs_lradc_ts *ts, unsigned int channel) { u32 reg; unsigned int num_samples, val; reg = readl(ts->base + LRADC_CH(channel)); if (reg & LRADC_CH_ACCUMULATE) num_samples = ts->over_sample_cnt; else num_samples = 1; val = (reg & LRADC_CH_VALUE_MASK) >> LRADC_CH_VALUE_OFFSET; return val / num_samples; } static unsigned int mxs_lradc_read_ts_pressure(struct mxs_lradc_ts *ts, unsigned int ch1, unsigned int ch2) { u32 reg, mask; unsigned int pressure, m1, m2; mask = LRADC_CTRL1_LRADC_IRQ(ch1) | LRADC_CTRL1_LRADC_IRQ(ch2); reg = readl(ts->base + LRADC_CTRL1) & mask; while (reg != mask) { reg = readl(ts->base + LRADC_CTRL1) & mask; dev_dbg(ts->dev, "One channel is still busy: %X\n", reg); } m1 = mxs_lradc_ts_read_raw_channel(ts, ch1); m2 = mxs_lradc_ts_read_raw_channel(ts, ch2); if (m2 == 0) { dev_warn(ts->dev, "Cannot calculate pressure\n"); return 1 << (LRADC_RESOLUTION - 1); } /* simply scale the value from 0 ... max ADC resolution */ pressure = m1; pressure *= (1 << LRADC_RESOLUTION); pressure /= m2; dev_dbg(ts->dev, "Pressure = %u\n", pressure); return pressure; } #define TS_CH_XP 2 #define TS_CH_YP 3 #define TS_CH_XM 4 #define TS_CH_YM 5 /* * YP(open)--+-------------+ * | |--+ * | | | * YM(-)--+-------------+ | * +--------------+ * | | * XP(weak+) XM(open) * * "weak+" means 200k Ohm VDDIO * (-) means GND */ static void mxs_lradc_setup_touch_detection(struct mxs_lradc_ts *ts) { struct mxs_lradc *lradc = ts->lradc; /* * In order to detect a touch event the 'touch detect enable' bit * enables: * - a weak pullup to the X+ connector * - a strong ground at the Y- connector */ writel(info[lradc->soc].mask, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR); writel(info[lradc->soc].bit, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_SET); } /* * YP(meas)--+-------------+ * | |--+ * | | | * YM(open)--+-------------+ | * +--------------+ * | | * XP(+) XM(-) * * (+) means here 1.85 V * (-) means here GND */ static void mxs_lradc_prepare_x_pos(struct mxs_lradc_ts *ts) { struct mxs_lradc *lradc = ts->lradc; writel(info[lradc->soc].mask, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR); writel(info[lradc->soc].x_plate, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_SET); ts->cur_plate = LRADC_SAMPLE_X; mxs_lradc_map_ts_channel(ts, TOUCHSCREEN_VCHANNEL1, TS_CH_YP); mxs_lradc_setup_ts_channel(ts, TOUCHSCREEN_VCHANNEL1); } /* * YP(+)--+-------------+ * | |--+ * | | | * YM(-)--+-------------+ | * +--------------+ * | | * XP(open) XM(meas) * * (+) means here 1.85 V * (-) means here GND */ static void mxs_lradc_prepare_y_pos(struct mxs_lradc_ts *ts) { struct mxs_lradc *lradc = ts->lradc; writel(info[lradc->soc].mask, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR); writel(info[lradc->soc].y_plate, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_SET); ts->cur_plate = LRADC_SAMPLE_Y; mxs_lradc_map_ts_channel(ts, TOUCHSCREEN_VCHANNEL1, TS_CH_XM); mxs_lradc_setup_ts_channel(ts, TOUCHSCREEN_VCHANNEL1); } /* * YP(+)--+-------------+ * | |--+ * | | | * YM(meas)--+-------------+ | * +--------------+ * | | * XP(meas) XM(-) * * (+) means here 1.85 V * (-) means here GND */ static void mxs_lradc_prepare_pressure(struct mxs_lradc_ts *ts) { struct mxs_lradc *lradc = ts->lradc; writel(info[lradc->soc].mask, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR); writel(info[lradc->soc].pressure, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_SET); ts->cur_plate = LRADC_SAMPLE_PRESSURE; mxs_lradc_map_ts_channel(ts, TOUCHSCREEN_VCHANNEL1, TS_CH_YM); mxs_lradc_map_ts_channel(ts, TOUCHSCREEN_VCHANNEL2, TS_CH_XP); mxs_lradc_setup_ts_pressure(ts, TOUCHSCREEN_VCHANNEL2, TOUCHSCREEN_VCHANNEL1); } static void mxs_lradc_enable_touch_detection(struct mxs_lradc_ts *ts) { mxs_lradc_setup_touch_detection(ts); ts->cur_plate = LRADC_TOUCH; writel(LRADC_CTRL1_TOUCH_DETECT_IRQ | LRADC_CTRL1_TOUCH_DETECT_IRQ_EN, ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR); writel(LRADC_CTRL1_TOUCH_DETECT_IRQ_EN, ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_SET); } static void mxs_lradc_start_touch_event(struct mxs_lradc_ts *ts) { writel(LRADC_CTRL1_TOUCH_DETECT_IRQ_EN, ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR); writel(LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL1), ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_SET); /* * start with the Y-pos, because it uses nearly the same plate * settings like the touch detection */ mxs_lradc_prepare_y_pos(ts); } static void mxs_lradc_report_ts_event(struct mxs_lradc_ts *ts) { input_report_abs(ts->ts_input, ABS_X, ts->ts_x_pos); input_report_abs(ts->ts_input, ABS_Y, ts->ts_y_pos); input_report_abs(ts->ts_input, ABS_PRESSURE, ts->ts_pressure); input_report_key(ts->ts_input, BTN_TOUCH, 1); input_sync(ts->ts_input); } static void mxs_lradc_complete_touch_event(struct mxs_lradc_ts *ts) { mxs_lradc_setup_touch_detection(ts); ts->cur_plate = LRADC_SAMPLE_VALID; /* * start a dummy conversion to burn time to settle the signals * note: we are not interested in the conversion's value */ writel(0, ts->base + LRADC_CH(TOUCHSCREEN_VCHANNEL1)); writel(LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1) | LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL2), ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR); writel(LRADC_DELAY_TRIGGER(1 << TOUCHSCREEN_VCHANNEL1) | LRADC_DELAY_KICK | LRADC_DELAY_DELAY(10), ts->base + LRADC_DELAY(2)); } /* * in order to avoid false measurements, report only samples where * the surface is still touched after the position measurement */ static void mxs_lradc_finish_touch_event(struct mxs_lradc_ts *ts, bool valid) { /* if it is still touched, report the sample */ if (valid && mxs_lradc_check_touch_event(ts)) { ts->ts_valid = true; mxs_lradc_report_ts_event(ts); } /* if it is even still touched, continue with the next measurement */ if (mxs_lradc_check_touch_event(ts)) { mxs_lradc_prepare_y_pos(ts); return; } if (ts->ts_valid) { /* signal the release */ ts->ts_valid = false; input_report_key(ts->ts_input, BTN_TOUCH, 0); input_sync(ts->ts_input); } /* if it is released, wait for the next touch via IRQ */ ts->cur_plate = LRADC_TOUCH; writel(0, ts->base + LRADC_DELAY(2)); writel(0, ts->base + LRADC_DELAY(3)); writel(LRADC_CTRL1_TOUCH_DETECT_IRQ | LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL1) | LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1), ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR); writel(LRADC_CTRL1_TOUCH_DETECT_IRQ_EN, ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_SET); } /* touchscreen's state machine */ static void mxs_lradc_handle_touch(struct mxs_lradc_ts *ts) { switch (ts->cur_plate) { case LRADC_TOUCH: if (mxs_lradc_check_touch_event(ts)) mxs_lradc_start_touch_event(ts); writel(LRADC_CTRL1_TOUCH_DETECT_IRQ, ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR); return; case LRADC_SAMPLE_Y: ts->ts_y_pos = mxs_lradc_ts_read_raw_channel(ts, TOUCHSCREEN_VCHANNEL1); mxs_lradc_prepare_x_pos(ts); return; case LRADC_SAMPLE_X: ts->ts_x_pos = mxs_lradc_ts_read_raw_channel(ts, TOUCHSCREEN_VCHANNEL1); mxs_lradc_prepare_pressure(ts); return; case LRADC_SAMPLE_PRESSURE: ts->ts_pressure = mxs_lradc_read_ts_pressure(ts, TOUCHSCREEN_VCHANNEL2, TOUCHSCREEN_VCHANNEL1); mxs_lradc_complete_touch_event(ts); return; case LRADC_SAMPLE_VALID: mxs_lradc_finish_touch_event(ts, 1); break; } } /* IRQ Handling */ static irqreturn_t mxs_lradc_ts_handle_irq(int irq, void *data) { struct mxs_lradc_ts *ts = data; struct mxs_lradc *lradc = ts->lradc; unsigned long reg = readl(ts->base + LRADC_CTRL1); u32 clr_irq = mxs_lradc_irq_mask(lradc); const u32 ts_irq_mask = LRADC_CTRL1_TOUCH_DETECT_IRQ | LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1) | LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL2); unsigned long flags; if (!(reg & mxs_lradc_irq_mask(lradc))) return IRQ_NONE; if (reg & ts_irq_mask) { spin_lock_irqsave(&ts->lock, flags); mxs_lradc_handle_touch(ts); spin_unlock_irqrestore(&ts->lock, flags); /* Make sure we don't clear the next conversion's interrupt. */ clr_irq &= ~(LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL1) | LRADC_CTRL1_LRADC_IRQ(TOUCHSCREEN_VCHANNEL2)); writel(reg & clr_irq, ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR); } return IRQ_HANDLED; } static int mxs_lradc_ts_open(struct input_dev *dev) { struct mxs_lradc_ts *ts = input_get_drvdata(dev); /* Enable the touch-detect circuitry. */ mxs_lradc_enable_touch_detection(ts); return 0; } static void mxs_lradc_ts_stop(struct mxs_lradc_ts *ts) { int i; struct mxs_lradc *lradc = ts->lradc; /* stop all interrupts from firing */ writel(LRADC_CTRL1_TOUCH_DETECT_IRQ_EN | LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL1) | LRADC_CTRL1_LRADC_IRQ_EN(TOUCHSCREEN_VCHANNEL2), ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR); /* Power-down touchscreen touch-detect circuitry. */ writel(info[lradc->soc].mask, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR); writel(lradc->buffer_vchans << LRADC_CTRL1_LRADC_IRQ_EN_OFFSET, ts->base + LRADC_CTRL1 + STMP_OFFSET_REG_CLR); for (i = 1; i < LRADC_MAX_DELAY_CHANS; i++) writel(0, ts->base + LRADC_DELAY(i)); } static void mxs_lradc_ts_close(struct input_dev *dev) { struct mxs_lradc_ts *ts = input_get_drvdata(dev); mxs_lradc_ts_stop(ts); } static void mxs_lradc_ts_hw_init(struct mxs_lradc_ts *ts) { struct mxs_lradc *lradc = ts->lradc; /* Configure the touchscreen type */ if (lradc->soc == IMX28_LRADC) { writel(LRADC_CTRL0_MX28_TOUCH_SCREEN_TYPE, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_CLR); if (lradc->touchscreen_wire == MXS_LRADC_TOUCHSCREEN_5WIRE) writel(LRADC_CTRL0_MX28_TOUCH_SCREEN_TYPE, ts->base + LRADC_CTRL0 + STMP_OFFSET_REG_SET); } } static int mxs_lradc_ts_register(struct mxs_lradc_ts *ts) { struct input_dev *input; struct device *dev = ts->dev; input = devm_input_allocate_device(dev); if (!input) return -ENOMEM; input->name = "mxs-lradc-ts"; input->id.bustype = BUS_HOST; input->open = mxs_lradc_ts_open; input->close = mxs_lradc_ts_close; __set_bit(INPUT_PROP_DIRECT, input->propbit); input_set_capability(input, EV_KEY, BTN_TOUCH); input_set_abs_params(input, ABS_X, 0, LRADC_SINGLE_SAMPLE_MASK, 0, 0); input_set_abs_params(input, ABS_Y, 0, LRADC_SINGLE_SAMPLE_MASK, 0, 0); input_set_abs_params(input, ABS_PRESSURE, 0, LRADC_SINGLE_SAMPLE_MASK, 0, 0); ts->ts_input = input; input_set_drvdata(input, ts); return input_register_device(input); } static int mxs_lradc_ts_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct device_node *node = dev->parent->of_node; struct mxs_lradc *lradc = dev_get_drvdata(dev->parent); struct mxs_lradc_ts *ts; struct resource *iores; int ret, irq, virq, i; u32 ts_wires = 0, adapt; ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); if (!ts) return -ENOMEM; platform_set_drvdata(pdev, ts); ts->lradc = lradc; ts->dev = dev; spin_lock_init(&ts->lock); iores = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!iores) return -EINVAL; ts->base = devm_ioremap(dev, iores->start, resource_size(iores)); if (!ts->base) return -ENOMEM; ret = of_property_read_u32(node, "fsl,lradc-touchscreen-wires", &ts_wires); if (ret) return ret; if (of_property_read_u32(node, "fsl,ave-ctrl", &adapt)) { ts->over_sample_cnt = 4; } else { if (adapt >= 1 && adapt <= 32) { ts->over_sample_cnt = adapt; } else { dev_err(ts->dev, "Invalid sample count (%u)\n", adapt); return -EINVAL; } } if (of_property_read_u32(node, "fsl,ave-delay", &adapt)) { ts->over_sample_delay = 2; } else { if (adapt >= 2 && adapt <= LRADC_DELAY_DELAY_MASK + 1) { ts->over_sample_delay = adapt; } else { dev_err(ts->dev, "Invalid sample delay (%u)\n", adapt); return -EINVAL; } } if (of_property_read_u32(node, "fsl,settling", &adapt)) { ts->settling_delay = 10; } else { if (adapt >= 1 && adapt <= LRADC_DELAY_DELAY_MASK) { ts->settling_delay = adapt; } else { dev_err(ts->dev, "Invalid settling delay (%u)\n", adapt); return -EINVAL; } } ret = stmp_reset_block(ts->base); if (ret) return ret; mxs_lradc_ts_hw_init(ts); for (i = 0; i < 3; i++) { irq = platform_get_irq_byname(pdev, mxs_lradc_ts_irq_names[i]); if (irq < 0) return irq; virq = irq_of_parse_and_map(node, irq); mxs_lradc_ts_stop(ts); ret = devm_request_irq(dev, virq, mxs_lradc_ts_handle_irq, 0, mxs_lradc_ts_irq_names[i], ts); if (ret) return ret; } return mxs_lradc_ts_register(ts); } static struct platform_driver mxs_lradc_ts_driver = { .driver = { .name = "mxs-lradc-ts", }, .probe = mxs_lradc_ts_probe, }; module_platform_driver(mxs_lradc_ts_driver); MODULE_AUTHOR("Marek Vasut <marex@denx.de>"); MODULE_DESCRIPTION("Freescale MXS LRADC touchscreen driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:mxs-lradc-ts");
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