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@@ -1,384 +0,0 @@
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-/*
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- * Texas Instruments TNETV107X Touchscreen Driver
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- *
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- * Copyright (C) 2010 Texas Instruments
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License as
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- * published by the Free Software Foundation version 2.
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- *
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- * This program is distributed "as is" WITHOUT ANY WARRANTY of any
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- * kind, whether express or implied; without even the implied warranty
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- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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- * GNU General Public License for more details.
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- */
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-
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-#include <linux/module.h>
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-#include <linux/kernel.h>
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-#include <linux/err.h>
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-#include <linux/errno.h>
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-#include <linux/input.h>
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-#include <linux/platform_device.h>
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-#include <linux/interrupt.h>
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-#include <linux/slab.h>
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-#include <linux/delay.h>
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-#include <linux/ctype.h>
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-#include <linux/io.h>
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-#include <linux/clk.h>
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-
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-#include <mach/tnetv107x.h>
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-
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-#define TSC_PENUP_POLL (HZ / 5)
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-#define IDLE_TIMEOUT 100 /* msec */
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-
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-/*
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- * The first and last samples of a touch interval are usually garbage and need
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- * to be filtered out with these devices. The following definitions control
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- * the number of samples skipped.
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- */
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-#define TSC_HEAD_SKIP 1
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-#define TSC_TAIL_SKIP 1
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-#define TSC_SKIP (TSC_HEAD_SKIP + TSC_TAIL_SKIP + 1)
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-#define TSC_SAMPLES (TSC_SKIP + 1)
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-
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-/* Register Offsets */
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-struct tsc_regs {
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- u32 rev;
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- u32 tscm;
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- u32 bwcm;
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- u32 swc;
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- u32 adcchnl;
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- u32 adcdata;
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- u32 chval[4];
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-};
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-
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-/* TSC Mode Configuration Register (tscm) bits */
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-#define WMODE BIT(0)
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-#define TSKIND BIT(1)
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-#define ZMEASURE_EN BIT(2)
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-#define IDLE BIT(3)
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-#define TSC_EN BIT(4)
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-#define STOP BIT(5)
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-#define ONE_SHOT BIT(6)
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-#define SINGLE BIT(7)
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-#define AVG BIT(8)
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-#define AVGNUM(x) (((x) & 0x03) << 9)
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-#define PVSTC(x) (((x) & 0x07) << 11)
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-#define PON BIT(14)
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-#define PONBG BIT(15)
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-#define AFERST BIT(16)
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-
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-/* ADC DATA Capture Register bits */
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-#define DATA_VALID BIT(16)
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-
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-/* Register Access Macros */
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-#define tsc_read(ts, reg) __raw_readl(&(ts)->regs->reg)
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-#define tsc_write(ts, reg, val) __raw_writel(val, &(ts)->regs->reg);
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-#define tsc_set_bits(ts, reg, val) \
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- tsc_write(ts, reg, tsc_read(ts, reg) | (val))
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-#define tsc_clr_bits(ts, reg, val) \
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- tsc_write(ts, reg, tsc_read(ts, reg) & ~(val))
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-
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-struct sample {
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- int x, y, p;
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-};
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-
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-struct tsc_data {
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- struct input_dev *input_dev;
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- struct resource *res;
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- struct tsc_regs __iomem *regs;
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- struct timer_list timer;
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- spinlock_t lock;
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- struct clk *clk;
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- struct device *dev;
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- int sample_count;
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- struct sample samples[TSC_SAMPLES];
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- int tsc_irq;
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-};
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-
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-static int tsc_read_sample(struct tsc_data *ts, struct sample* sample)
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-{
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- int x, y, z1, z2, t, p = 0;
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- u32 val;
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-
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- val = tsc_read(ts, chval[0]);
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- if (val & DATA_VALID)
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- x = val & 0xffff;
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- else
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- return -EINVAL;
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-
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- y = tsc_read(ts, chval[1]) & 0xffff;
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- z1 = tsc_read(ts, chval[2]) & 0xffff;
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- z2 = tsc_read(ts, chval[3]) & 0xffff;
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-
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- if (z1) {
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- t = ((600 * x) * (z2 - z1));
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- p = t / (u32) (z1 << 12);
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- if (p < 0)
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- p = 0;
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- }
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-
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- sample->x = x;
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- sample->y = y;
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- sample->p = p;
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-
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- return 0;
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-}
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-
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-static void tsc_poll(unsigned long data)
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-{
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- struct tsc_data *ts = (struct tsc_data *)data;
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- unsigned long flags;
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- int i, val, x, y, p;
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-
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- spin_lock_irqsave(&ts->lock, flags);
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-
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- if (ts->sample_count >= TSC_SKIP) {
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- input_report_abs(ts->input_dev, ABS_PRESSURE, 0);
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- input_report_key(ts->input_dev, BTN_TOUCH, 0);
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- input_sync(ts->input_dev);
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- } else if (ts->sample_count > 0) {
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- /*
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- * A touch event lasted less than our skip count. Salvage and
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- * report anyway.
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- */
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- for (i = 0, val = 0; i < ts->sample_count; i++)
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- val += ts->samples[i].x;
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- x = val / ts->sample_count;
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-
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- for (i = 0, val = 0; i < ts->sample_count; i++)
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- val += ts->samples[i].y;
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- y = val / ts->sample_count;
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-
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- for (i = 0, val = 0; i < ts->sample_count; i++)
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- val += ts->samples[i].p;
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- p = val / ts->sample_count;
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-
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- input_report_abs(ts->input_dev, ABS_X, x);
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- input_report_abs(ts->input_dev, ABS_Y, y);
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- input_report_abs(ts->input_dev, ABS_PRESSURE, p);
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- input_report_key(ts->input_dev, BTN_TOUCH, 1);
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- input_sync(ts->input_dev);
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- }
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-
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- ts->sample_count = 0;
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-
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- spin_unlock_irqrestore(&ts->lock, flags);
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-}
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-
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-static irqreturn_t tsc_irq(int irq, void *dev_id)
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-{
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- struct tsc_data *ts = (struct tsc_data *)dev_id;
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- struct sample *sample;
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- int index;
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-
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- spin_lock(&ts->lock);
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-
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- index = ts->sample_count % TSC_SAMPLES;
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- sample = &ts->samples[index];
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- if (tsc_read_sample(ts, sample) < 0)
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- goto out;
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-
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- if (++ts->sample_count >= TSC_SKIP) {
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- index = (ts->sample_count - TSC_TAIL_SKIP - 1) % TSC_SAMPLES;
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- sample = &ts->samples[index];
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-
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- input_report_abs(ts->input_dev, ABS_X, sample->x);
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- input_report_abs(ts->input_dev, ABS_Y, sample->y);
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- input_report_abs(ts->input_dev, ABS_PRESSURE, sample->p);
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- if (ts->sample_count == TSC_SKIP)
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- input_report_key(ts->input_dev, BTN_TOUCH, 1);
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- input_sync(ts->input_dev);
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- }
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- mod_timer(&ts->timer, jiffies + TSC_PENUP_POLL);
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-out:
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- spin_unlock(&ts->lock);
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- return IRQ_HANDLED;
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-}
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-
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-static int tsc_start(struct input_dev *dev)
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-{
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- struct tsc_data *ts = input_get_drvdata(dev);
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- unsigned long timeout = jiffies + msecs_to_jiffies(IDLE_TIMEOUT);
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- u32 val;
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-
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- clk_enable(ts->clk);
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-
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- /* Go to idle mode, before any initialization */
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- while (time_after(timeout, jiffies)) {
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- if (tsc_read(ts, tscm) & IDLE)
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- break;
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- }
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-
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- if (time_before(timeout, jiffies)) {
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- dev_warn(ts->dev, "timeout waiting for idle\n");
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- clk_disable(ts->clk);
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- return -EIO;
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- }
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-
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- /* Configure TSC Control register*/
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- val = (PONBG | PON | PVSTC(4) | ONE_SHOT | ZMEASURE_EN);
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- tsc_write(ts, tscm, val);
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-
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- /* Bring TSC out of reset: Clear AFE reset bit */
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- val &= ~(AFERST);
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- tsc_write(ts, tscm, val);
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-
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- /* Configure all pins for hardware control*/
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- tsc_write(ts, bwcm, 0);
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-
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- /* Finally enable the TSC */
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- tsc_set_bits(ts, tscm, TSC_EN);
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-
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- return 0;
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-}
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-
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-static void tsc_stop(struct input_dev *dev)
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-{
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- struct tsc_data *ts = input_get_drvdata(dev);
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-
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- tsc_clr_bits(ts, tscm, TSC_EN);
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- synchronize_irq(ts->tsc_irq);
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- del_timer_sync(&ts->timer);
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- clk_disable(ts->clk);
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-}
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-
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-static int tsc_probe(struct platform_device *pdev)
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-{
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- struct device *dev = &pdev->dev;
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- struct tsc_data *ts;
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- int error = 0;
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- u32 rev = 0;
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-
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- ts = kzalloc(sizeof(struct tsc_data), GFP_KERNEL);
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- if (!ts) {
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- dev_err(dev, "cannot allocate device info\n");
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- return -ENOMEM;
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- }
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-
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- ts->dev = dev;
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- spin_lock_init(&ts->lock);
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- setup_timer(&ts->timer, tsc_poll, (unsigned long)ts);
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- platform_set_drvdata(pdev, ts);
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-
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- ts->tsc_irq = platform_get_irq(pdev, 0);
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- if (ts->tsc_irq < 0) {
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- dev_err(dev, "cannot determine device interrupt\n");
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- error = -ENODEV;
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- goto error_res;
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- }
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-
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- ts->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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- if (!ts->res) {
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- dev_err(dev, "cannot determine register area\n");
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- error = -ENODEV;
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- goto error_res;
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- }
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-
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- if (!request_mem_region(ts->res->start, resource_size(ts->res),
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- pdev->name)) {
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- dev_err(dev, "cannot claim register memory\n");
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- ts->res = NULL;
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- error = -EINVAL;
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- goto error_res;
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- }
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-
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- ts->regs = ioremap(ts->res->start, resource_size(ts->res));
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- if (!ts->regs) {
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- dev_err(dev, "cannot map register memory\n");
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- error = -ENOMEM;
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- goto error_map;
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- }
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-
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- ts->clk = clk_get(dev, NULL);
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- if (IS_ERR(ts->clk)) {
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- dev_err(dev, "cannot claim device clock\n");
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- error = PTR_ERR(ts->clk);
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- goto error_clk;
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- }
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-
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- error = request_threaded_irq(ts->tsc_irq, NULL, tsc_irq, IRQF_ONESHOT,
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- dev_name(dev), ts);
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- if (error < 0) {
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- dev_err(ts->dev, "Could not allocate ts irq\n");
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- goto error_irq;
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- }
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-
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- ts->input_dev = input_allocate_device();
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- if (!ts->input_dev) {
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- dev_err(dev, "cannot allocate input device\n");
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- error = -ENOMEM;
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- goto error_input;
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- }
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- input_set_drvdata(ts->input_dev, ts);
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-
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- ts->input_dev->name = pdev->name;
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- ts->input_dev->id.bustype = BUS_HOST;
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- ts->input_dev->dev.parent = &pdev->dev;
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- ts->input_dev->open = tsc_start;
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- ts->input_dev->close = tsc_stop;
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-
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- clk_enable(ts->clk);
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- rev = tsc_read(ts, rev);
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- ts->input_dev->id.product = ((rev >> 8) & 0x07);
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- ts->input_dev->id.version = ((rev >> 16) & 0xfff);
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- clk_disable(ts->clk);
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-
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- __set_bit(EV_KEY, ts->input_dev->evbit);
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- __set_bit(EV_ABS, ts->input_dev->evbit);
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- __set_bit(BTN_TOUCH, ts->input_dev->keybit);
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-
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- input_set_abs_params(ts->input_dev, ABS_X, 0, 0xffff, 5, 0);
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- input_set_abs_params(ts->input_dev, ABS_Y, 0, 0xffff, 5, 0);
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- input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 4095, 128, 0);
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-
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- error = input_register_device(ts->input_dev);
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- if (error < 0) {
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- dev_err(dev, "failed input device registration\n");
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- goto error_reg;
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- }
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-
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- return 0;
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-
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-error_reg:
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- input_free_device(ts->input_dev);
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-error_input:
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- free_irq(ts->tsc_irq, ts);
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-error_irq:
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- clk_put(ts->clk);
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-error_clk:
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- iounmap(ts->regs);
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-error_map:
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- release_mem_region(ts->res->start, resource_size(ts->res));
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-error_res:
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- kfree(ts);
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-
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- return error;
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-}
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-
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-static int tsc_remove(struct platform_device *pdev)
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-{
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- struct tsc_data *ts = platform_get_drvdata(pdev);
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-
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- input_unregister_device(ts->input_dev);
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- free_irq(ts->tsc_irq, ts);
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- clk_put(ts->clk);
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- iounmap(ts->regs);
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- release_mem_region(ts->res->start, resource_size(ts->res));
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- kfree(ts);
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-
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- return 0;
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-}
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-
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-static struct platform_driver tsc_driver = {
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- .probe = tsc_probe,
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- .remove = tsc_remove,
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- .driver.name = "tnetv107x-ts",
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- .driver.owner = THIS_MODULE,
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-};
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-module_platform_driver(tsc_driver);
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-
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-MODULE_AUTHOR("Cyril Chemparathy");
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-MODULE_DESCRIPTION("TNETV107X Touchscreen Driver");
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-MODULE_ALIAS("platform:tnetv107x-ts");
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-MODULE_LICENSE("GPL");
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