Re: [PATCH 3/3] input: remove obsolete tnetv107x drivers

From: Dmitry Torokhov
Date: Fri Mar 28 2014 - 04:36:31 EST

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On Tue, Mar 18, 2014 at 03:56:01PM +0100, Arnd Bergmann wrote:
> The tnetv107x platform is getting removed, so the touchscreen
> and keypad drivers for this platform will no longer be needed
> either.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> Acked-by: Sekhar Nori <nsekhar@xxxxxx>
> Acked-by: Kevin Hilman <khilman@xxxxxxxxxx>
> Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
> Cc: linux-input@xxxxxxxxxxxxxxx

Applied, thank you.

> ---
> drivers/input/keyboard/Kconfig | 10 -
> drivers/input/keyboard/Makefile | 1 -
> drivers/input/keyboard/tnetv107x-keypad.c | 329 -------------------------
> drivers/input/touchscreen/Kconfig | 9 -
> drivers/input/touchscreen/Makefile | 1 -
> drivers/input/touchscreen/tnetv107x-ts.c | 384 ------------------------------
> 6 files changed, 734 deletions(-)
> delete mode 100644 drivers/input/keyboard/tnetv107x-keypad.c
> delete mode 100644 drivers/input/touchscreen/tnetv107x-ts.c
>
> diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
> index a673c9f..935dcaf 100644
> --- a/drivers/input/keyboard/Kconfig
> +++ b/drivers/input/keyboard/Kconfig
> @@ -595,16 +595,6 @@ config KEYBOARD_TC3589X
> To compile this driver as a module, choose M here: the
> module will be called tc3589x-keypad.
>
> -config KEYBOARD_TNETV107X
> - tristate "TI TNETV107X keypad support"
> - depends on ARCH_DAVINCI_TNETV107X
> - select INPUT_MATRIXKMAP
> - help
> - Say Y here if you want to use the TNETV107X keypad.
> -
> - To compile this driver as a module, choose M here: the
> - module will be called tnetv107x-keypad.
> -
> config KEYBOARD_TWL4030
> tristate "TI TWL4030/TWL5030/TPS659x0 keypad support"
> depends on TWL4030_CORE
> diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
> index a699b61..81014d9 100644
> --- a/drivers/input/keyboard/Makefile
> +++ b/drivers/input/keyboard/Makefile
> @@ -53,7 +53,6 @@ obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o
> obj-$(CONFIG_KEYBOARD_SUNKBD) += sunkbd.o
> obj-$(CONFIG_KEYBOARD_TC3589X) += tc3589x-keypad.o
> obj-$(CONFIG_KEYBOARD_TEGRA) += tegra-kbc.o
> -obj-$(CONFIG_KEYBOARD_TNETV107X) += tnetv107x-keypad.o
> obj-$(CONFIG_KEYBOARD_TWL4030) += twl4030_keypad.o
> obj-$(CONFIG_KEYBOARD_XTKBD) += xtkbd.o
> obj-$(CONFIG_KEYBOARD_W90P910) += w90p910_keypad.o
> diff --git a/drivers/input/keyboard/tnetv107x-keypad.c b/drivers/input/keyboard/tnetv107x-keypad.c
> deleted file mode 100644
> index 086511c..0000000
> --- a/drivers/input/keyboard/tnetv107x-keypad.c
> +++ /dev/null
> @@ -1,329 +0,0 @@
> -/*
> - * Texas Instruments TNETV107X Keypad Driver
> - *
> - * Copyright (C) 2010 Texas Instruments
> - *
> - * This program is free software; you can redistribute it and/or
> - * modify it under the terms of the GNU General Public License as
> - * published by the Free Software Foundation version 2.
> - *
> - * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> - * kind, whether express or implied; without even the implied warranty
> - * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> - * GNU General Public License for more details.
> - */
> -
> -#include <linux/kernel.h>
> -#include <linux/err.h>
> -#include <linux/errno.h>
> -#include <linux/input.h>
> -#include <linux/platform_device.h>
> -#include <linux/interrupt.h>
> -#include <linux/slab.h>
> -#include <linux/delay.h>
> -#include <linux/io.h>
> -#include <linux/clk.h>
> -#include <linux/input/matrix_keypad.h>
> -#include <linux/module.h>
> -
> -#define BITS(x) (BIT(x) - 1)
> -
> -#define KEYPAD_ROWS 9
> -#define KEYPAD_COLS 9
> -
> -#define DEBOUNCE_MIN 0x400ul
> -#define DEBOUNCE_MAX 0x3ffffffful
> -
> -struct keypad_regs {
> - u32 rev;
> - u32 mode;
> - u32 mask;
> - u32 pol;
> - u32 dclock;
> - u32 rclock;
> - u32 stable_cnt;
> - u32 in_en;
> - u32 out;
> - u32 out_en;
> - u32 in;
> - u32 lock;
> - u32 pres[3];
> -};
> -
> -#define keypad_read(kp, reg) __raw_readl(&(kp)->regs->reg)
> -#define keypad_write(kp, reg, val) __raw_writel(val, &(kp)->regs->reg)
> -
> -struct keypad_data {
> - struct input_dev *input_dev;
> - struct resource *res;
> - struct keypad_regs __iomem *regs;
> - struct clk *clk;
> - struct device *dev;
> - spinlock_t lock;
> - int irq_press;
> - int irq_release;
> - int rows, cols, row_shift;
> - int debounce_ms, active_low;
> - u32 prev_keys[3];
> - unsigned short keycodes[];
> -};
> -
> -static irqreturn_t keypad_irq(int irq, void *data)
> -{
> - struct keypad_data *kp = data;
> - int i, bit, val, row, col, code;
> - unsigned long flags;
> - u32 curr_keys[3];
> - u32 change;
> -
> - spin_lock_irqsave(&kp->lock, flags);
> -
> - memset(curr_keys, 0, sizeof(curr_keys));
> - if (irq == kp->irq_press)
> - for (i = 0; i < 3; i++)
> - curr_keys[i] = keypad_read(kp, pres[i]);
> -
> - for (i = 0; i < 3; i++) {
> - change = curr_keys[i] ^ kp->prev_keys[i];
> -
> - while (change) {
> - bit = fls(change) - 1;
> - change ^= BIT(bit);
> - val = curr_keys[i] & BIT(bit);
> - bit += i * 32;
> - row = bit / KEYPAD_COLS;
> - col = bit % KEYPAD_COLS;
> -
> - code = MATRIX_SCAN_CODE(row, col, kp->row_shift);
> - input_event(kp->input_dev, EV_MSC, MSC_SCAN, code);
> - input_report_key(kp->input_dev, kp->keycodes[code],
> - val);
> - }
> - }
> - input_sync(kp->input_dev);
> - memcpy(kp->prev_keys, curr_keys, sizeof(curr_keys));
> -
> - if (irq == kp->irq_press)
> - keypad_write(kp, lock, 0); /* Allow hardware updates */
> -
> - spin_unlock_irqrestore(&kp->lock, flags);
> -
> - return IRQ_HANDLED;
> -}
> -
> -static int keypad_start(struct input_dev *dev)
> -{
> - struct keypad_data *kp = input_get_drvdata(dev);
> - unsigned long mask, debounce, clk_rate_khz;
> - unsigned long flags;
> -
> - clk_enable(kp->clk);
> - clk_rate_khz = clk_get_rate(kp->clk) / 1000;
> -
> - spin_lock_irqsave(&kp->lock, flags);
> -
> - /* Initialize device registers */
> - keypad_write(kp, mode, 0);
> -
> - mask = BITS(kp->rows) << KEYPAD_COLS;
> - mask |= BITS(kp->cols);
> - keypad_write(kp, mask, ~mask);
> -
> - keypad_write(kp, pol, kp->active_low ? 0 : 0x3ffff);
> - keypad_write(kp, stable_cnt, 3);
> -
> - debounce = kp->debounce_ms * clk_rate_khz;
> - debounce = clamp(debounce, DEBOUNCE_MIN, DEBOUNCE_MAX);
> - keypad_write(kp, dclock, debounce);
> - keypad_write(kp, rclock, 4 * debounce);
> -
> - keypad_write(kp, in_en, 1);
> -
> - spin_unlock_irqrestore(&kp->lock, flags);
> -
> - return 0;
> -}
> -
> -static void keypad_stop(struct input_dev *dev)
> -{
> - struct keypad_data *kp = input_get_drvdata(dev);
> -
> - synchronize_irq(kp->irq_press);
> - synchronize_irq(kp->irq_release);
> - clk_disable(kp->clk);
> -}
> -
> -static int keypad_probe(struct platform_device *pdev)
> -{
> - const struct matrix_keypad_platform_data *pdata;
> - const struct matrix_keymap_data *keymap_data;
> - struct device *dev = &pdev->dev;
> - struct keypad_data *kp;
> - int error = 0, sz, row_shift;
> - u32 rev = 0;
> -
> - pdata = dev_get_platdata(&pdev->dev);
> - if (!pdata) {
> - dev_err(dev, "cannot find device data\n");
> - return -EINVAL;
> - }
> -
> - keymap_data = pdata->keymap_data;
> - if (!keymap_data) {
> - dev_err(dev, "cannot find keymap data\n");
> - return -EINVAL;
> - }
> -
> - row_shift = get_count_order(pdata->num_col_gpios);
> - sz = offsetof(struct keypad_data, keycodes);
> - sz += (pdata->num_row_gpios << row_shift) * sizeof(kp->keycodes[0]);
> - kp = kzalloc(sz, GFP_KERNEL);
> - if (!kp) {
> - dev_err(dev, "cannot allocate device info\n");
> - return -ENOMEM;
> - }
> -
> - kp->dev = dev;
> - kp->rows = pdata->num_row_gpios;
> - kp->cols = pdata->num_col_gpios;
> - kp->row_shift = row_shift;
> - platform_set_drvdata(pdev, kp);
> - spin_lock_init(&kp->lock);
> -
> - kp->irq_press = platform_get_irq_byname(pdev, "press");
> - kp->irq_release = platform_get_irq_byname(pdev, "release");
> - if (kp->irq_press < 0 || kp->irq_release < 0) {
> - dev_err(dev, "cannot determine device interrupts\n");
> - error = -ENODEV;
> - goto error_res;
> - }
> -
> - kp->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - if (!kp->res) {
> - dev_err(dev, "cannot determine register area\n");
> - error = -ENODEV;
> - goto error_res;
> - }
> -
> - if (!request_mem_region(kp->res->start, resource_size(kp->res),
> - pdev->name)) {
> - dev_err(dev, "cannot claim register memory\n");
> - kp->res = NULL;
> - error = -EINVAL;
> - goto error_res;
> - }
> -
> - kp->regs = ioremap(kp->res->start, resource_size(kp->res));
> - if (!kp->regs) {
> - dev_err(dev, "cannot map register memory\n");
> - error = -ENOMEM;
> - goto error_map;
> - }
> -
> - kp->clk = clk_get(dev, NULL);
> - if (IS_ERR(kp->clk)) {
> - dev_err(dev, "cannot claim device clock\n");
> - error = PTR_ERR(kp->clk);
> - goto error_clk;
> - }
> -
> - error = request_threaded_irq(kp->irq_press, NULL, keypad_irq,
> - IRQF_ONESHOT, dev_name(dev), kp);
> - if (error < 0) {
> - dev_err(kp->dev, "Could not allocate keypad press key irq\n");
> - goto error_irq_press;
> - }
> -
> - error = request_threaded_irq(kp->irq_release, NULL, keypad_irq,
> - IRQF_ONESHOT, dev_name(dev), kp);
> - if (error < 0) {
> - dev_err(kp->dev, "Could not allocate keypad release key irq\n");
> - goto error_irq_release;
> - }
> -
> - kp->input_dev = input_allocate_device();
> - if (!kp->input_dev) {
> - dev_err(dev, "cannot allocate input device\n");
> - error = -ENOMEM;
> - goto error_input;
> - }
> -
> - kp->input_dev->name = pdev->name;
> - kp->input_dev->dev.parent = &pdev->dev;
> - kp->input_dev->open = keypad_start;
> - kp->input_dev->close = keypad_stop;
> -
> - clk_enable(kp->clk);
> - rev = keypad_read(kp, rev);
> - kp->input_dev->id.bustype = BUS_HOST;
> - kp->input_dev->id.product = ((rev >> 8) & 0x07);
> - kp->input_dev->id.version = ((rev >> 16) & 0xfff);
> - clk_disable(kp->clk);
> -
> - error = matrix_keypad_build_keymap(keymap_data, NULL,
> - kp->rows, kp->cols,
> - kp->keycodes, kp->input_dev);
> - if (error) {
> - dev_err(dev, "Failed to build keymap\n");
> - goto error_reg;
> - }
> -
> - if (!pdata->no_autorepeat)
> - kp->input_dev->evbit[0] |= BIT_MASK(EV_REP);
> - input_set_capability(kp->input_dev, EV_MSC, MSC_SCAN);
> -
> - input_set_drvdata(kp->input_dev, kp);
> -
> - error = input_register_device(kp->input_dev);
> - if (error < 0) {
> - dev_err(dev, "Could not register input device\n");
> - goto error_reg;
> - }
> -
> - return 0;
> -
> -
> -error_reg:
> - input_free_device(kp->input_dev);
> -error_input:
> - free_irq(kp->irq_release, kp);
> -error_irq_release:
> - free_irq(kp->irq_press, kp);
> -error_irq_press:
> - clk_put(kp->clk);
> -error_clk:
> - iounmap(kp->regs);
> -error_map:
> - release_mem_region(kp->res->start, resource_size(kp->res));
> -error_res:
> - kfree(kp);
> - return error;
> -}
> -
> -static int keypad_remove(struct platform_device *pdev)
> -{
> - struct keypad_data *kp = platform_get_drvdata(pdev);
> -
> - free_irq(kp->irq_press, kp);
> - free_irq(kp->irq_release, kp);
> - input_unregister_device(kp->input_dev);
> - clk_put(kp->clk);
> - iounmap(kp->regs);
> - release_mem_region(kp->res->start, resource_size(kp->res));
> - kfree(kp);
> -
> - return 0;
> -}
> -
> -static struct platform_driver keypad_driver = {
> - .probe = keypad_probe,
> - .remove = keypad_remove,
> - .driver.name = "tnetv107x-keypad",
> - .driver.owner = THIS_MODULE,
> -};
> -module_platform_driver(keypad_driver);
> -
> -MODULE_AUTHOR("Cyril Chemparathy");
> -MODULE_DESCRIPTION("TNETV107X Keypad Driver");
> -MODULE_ALIAS("platform:tnetv107x-keypad");
> -MODULE_LICENSE("GPL");
> diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
> index 07e9e82..68edc9d 100644
> --- a/drivers/input/touchscreen/Kconfig
> +++ b/drivers/input/touchscreen/Kconfig
> @@ -514,15 +514,6 @@ config TOUCHSCREEN_MIGOR
> To compile this driver as a module, choose M here: the
> module will be called migor_ts.
>
> -config TOUCHSCREEN_TNETV107X
> - tristate "TI TNETV107X touchscreen support"
> - depends on ARCH_DAVINCI_TNETV107X
> - help
> - Say Y here if you want to use the TNETV107X touchscreen.
> -
> - To compile this driver as a module, choose M here: the
> - module will be called tnetv107x-ts.
> -
> config TOUCHSCREEN_TOUCHRIGHT
> tristate "Touchright serial touchscreen"
> select SERIO
> diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
> index 62801f2..4bc954b 100644
> --- a/drivers/input/touchscreen/Makefile
> +++ b/drivers/input/touchscreen/Makefile
> @@ -56,7 +56,6 @@ obj-$(CONFIG_TOUCHSCREEN_ST1232) += st1232.o
> obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o
> obj-$(CONFIG_TOUCHSCREEN_SUR40) += sur40.o
> obj-$(CONFIG_TOUCHSCREEN_TI_AM335X_TSC) += ti_am335x_tsc.o
> -obj-$(CONFIG_TOUCHSCREEN_TNETV107X) += tnetv107x-ts.o
> obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o
> obj-$(CONFIG_TOUCHSCREEN_TOUCHRIGHT) += touchright.o
> obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN) += touchwin.o
> diff --git a/drivers/input/touchscreen/tnetv107x-ts.c b/drivers/input/touchscreen/tnetv107x-ts.c
> deleted file mode 100644
> index c47827a..0000000
> --- a/drivers/input/touchscreen/tnetv107x-ts.c
> +++ /dev/null
> @@ -1,384 +0,0 @@
> -/*
> - * Texas Instruments TNETV107X Touchscreen Driver
> - *
> - * Copyright (C) 2010 Texas Instruments
> - *
> - * This program is free software; you can redistribute it and/or
> - * modify it under the terms of the GNU General Public License as
> - * published by the Free Software Foundation version 2.
> - *
> - * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> - * kind, whether express or implied; without even the implied warranty
> - * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> - * GNU General Public License for more details.
> - */
> -
> -#include <linux/module.h>
> -#include <linux/kernel.h>
> -#include <linux/err.h>
> -#include <linux/errno.h>
> -#include <linux/input.h>
> -#include <linux/platform_device.h>
> -#include <linux/interrupt.h>
> -#include <linux/slab.h>
> -#include <linux/delay.h>
> -#include <linux/ctype.h>
> -#include <linux/io.h>
> -#include <linux/clk.h>
> -
> -#include <mach/tnetv107x.h>
> -
> -#define TSC_PENUP_POLL (HZ / 5)
> -#define IDLE_TIMEOUT 100 /* msec */
> -
> -/*
> - * The first and last samples of a touch interval are usually garbage and need
> - * to be filtered out with these devices. The following definitions control
> - * the number of samples skipped.
> - */
> -#define TSC_HEAD_SKIP 1
> -#define TSC_TAIL_SKIP 1
> -#define TSC_SKIP (TSC_HEAD_SKIP + TSC_TAIL_SKIP + 1)
> -#define TSC_SAMPLES (TSC_SKIP + 1)
> -
> -/* Register Offsets */
> -struct tsc_regs {
> - u32 rev;
> - u32 tscm;
> - u32 bwcm;
> - u32 swc;
> - u32 adcchnl;
> - u32 adcdata;
> - u32 chval[4];
> -};
> -
> -/* TSC Mode Configuration Register (tscm) bits */
> -#define WMODE BIT(0)
> -#define TSKIND BIT(1)
> -#define ZMEASURE_EN BIT(2)
> -#define IDLE BIT(3)
> -#define TSC_EN BIT(4)
> -#define STOP BIT(5)
> -#define ONE_SHOT BIT(6)
> -#define SINGLE BIT(7)
> -#define AVG BIT(8)
> -#define AVGNUM(x) (((x) & 0x03) << 9)
> -#define PVSTC(x) (((x) & 0x07) << 11)
> -#define PON BIT(14)
> -#define PONBG BIT(15)
> -#define AFERST BIT(16)
> -
> -/* ADC DATA Capture Register bits */
> -#define DATA_VALID BIT(16)
> -
> -/* Register Access Macros */
> -#define tsc_read(ts, reg) __raw_readl(&(ts)->regs->reg)
> -#define tsc_write(ts, reg, val) __raw_writel(val, &(ts)->regs->reg);
> -#define tsc_set_bits(ts, reg, val) \
> - tsc_write(ts, reg, tsc_read(ts, reg) | (val))
> -#define tsc_clr_bits(ts, reg, val) \
> - tsc_write(ts, reg, tsc_read(ts, reg) & ~(val))
> -
> -struct sample {
> - int x, y, p;
> -};
> -
> -struct tsc_data {
> - struct input_dev *input_dev;
> - struct resource *res;
> - struct tsc_regs __iomem *regs;
> - struct timer_list timer;
> - spinlock_t lock;
> - struct clk *clk;
> - struct device *dev;
> - int sample_count;
> - struct sample samples[TSC_SAMPLES];
> - int tsc_irq;
> -};
> -
> -static int tsc_read_sample(struct tsc_data *ts, struct sample* sample)
> -{
> - int x, y, z1, z2, t, p = 0;
> - u32 val;
> -
> - val = tsc_read(ts, chval[0]);
> - if (val & DATA_VALID)
> - x = val & 0xffff;
> - else
> - return -EINVAL;
> -
> - y = tsc_read(ts, chval[1]) & 0xffff;
> - z1 = tsc_read(ts, chval[2]) & 0xffff;
> - z2 = tsc_read(ts, chval[3]) & 0xffff;
> -
> - if (z1) {
> - t = ((600 * x) * (z2 - z1));
> - p = t / (u32) (z1 << 12);
> - if (p < 0)
> - p = 0;
> - }
> -
> - sample->x = x;
> - sample->y = y;
> - sample->p = p;
> -
> - return 0;
> -}
> -
> -static void tsc_poll(unsigned long data)
> -{
> - struct tsc_data *ts = (struct tsc_data *)data;
> - unsigned long flags;
> - int i, val, x, y, p;
> -
> - spin_lock_irqsave(&ts->lock, flags);
> -
> - if (ts->sample_count >= TSC_SKIP) {
> - input_report_abs(ts->input_dev, ABS_PRESSURE, 0);
> - input_report_key(ts->input_dev, BTN_TOUCH, 0);
> - input_sync(ts->input_dev);
> - } else if (ts->sample_count > 0) {
> - /*
> - * A touch event lasted less than our skip count. Salvage and
> - * report anyway.
> - */
> - for (i = 0, val = 0; i < ts->sample_count; i++)
> - val += ts->samples[i].x;
> - x = val / ts->sample_count;
> -
> - for (i = 0, val = 0; i < ts->sample_count; i++)
> - val += ts->samples[i].y;
> - y = val / ts->sample_count;
> -
> - for (i = 0, val = 0; i < ts->sample_count; i++)
> - val += ts->samples[i].p;
> - p = val / ts->sample_count;
> -
> - input_report_abs(ts->input_dev, ABS_X, x);
> - input_report_abs(ts->input_dev, ABS_Y, y);
> - input_report_abs(ts->input_dev, ABS_PRESSURE, p);
> - input_report_key(ts->input_dev, BTN_TOUCH, 1);
> - input_sync(ts->input_dev);
> - }
> -
> - ts->sample_count = 0;
> -
> - spin_unlock_irqrestore(&ts->lock, flags);
> -}
> -
> -static irqreturn_t tsc_irq(int irq, void *dev_id)
> -{
> - struct tsc_data *ts = (struct tsc_data *)dev_id;
> - struct sample *sample;
> - int index;
> -
> - spin_lock(&ts->lock);
> -
> - index = ts->sample_count % TSC_SAMPLES;
> - sample = &ts->samples[index];
> - if (tsc_read_sample(ts, sample) < 0)
> - goto out;
> -
> - if (++ts->sample_count >= TSC_SKIP) {
> - index = (ts->sample_count - TSC_TAIL_SKIP - 1) % TSC_SAMPLES;
> - sample = &ts->samples[index];
> -
> - input_report_abs(ts->input_dev, ABS_X, sample->x);
> - input_report_abs(ts->input_dev, ABS_Y, sample->y);
> - input_report_abs(ts->input_dev, ABS_PRESSURE, sample->p);
> - if (ts->sample_count == TSC_SKIP)
> - input_report_key(ts->input_dev, BTN_TOUCH, 1);
> - input_sync(ts->input_dev);
> - }
> - mod_timer(&ts->timer, jiffies + TSC_PENUP_POLL);
> -out:
> - spin_unlock(&ts->lock);
> - return IRQ_HANDLED;
> -}
> -
> -static int tsc_start(struct input_dev *dev)
> -{
> - struct tsc_data *ts = input_get_drvdata(dev);
> - unsigned long timeout = jiffies + msecs_to_jiffies(IDLE_TIMEOUT);
> - u32 val;
> -
> - clk_enable(ts->clk);
> -
> - /* Go to idle mode, before any initialization */
> - while (time_after(timeout, jiffies)) {
> - if (tsc_read(ts, tscm) & IDLE)
> - break;
> - }
> -
> - if (time_before(timeout, jiffies)) {
> - dev_warn(ts->dev, "timeout waiting for idle\n");
> - clk_disable(ts->clk);
> - return -EIO;
> - }
> -
> - /* Configure TSC Control register*/
> - val = (PONBG | PON | PVSTC(4) | ONE_SHOT | ZMEASURE_EN);
> - tsc_write(ts, tscm, val);
> -
> - /* Bring TSC out of reset: Clear AFE reset bit */
> - val &= ~(AFERST);
> - tsc_write(ts, tscm, val);
> -
> - /* Configure all pins for hardware control*/
> - tsc_write(ts, bwcm, 0);
> -
> - /* Finally enable the TSC */
> - tsc_set_bits(ts, tscm, TSC_EN);
> -
> - return 0;
> -}
> -
> -static void tsc_stop(struct input_dev *dev)
> -{
> - struct tsc_data *ts = input_get_drvdata(dev);
> -
> - tsc_clr_bits(ts, tscm, TSC_EN);
> - synchronize_irq(ts->tsc_irq);
> - del_timer_sync(&ts->timer);
> - clk_disable(ts->clk);
> -}
> -
> -static int tsc_probe(struct platform_device *pdev)
> -{
> - struct device *dev = &pdev->dev;
> - struct tsc_data *ts;
> - int error = 0;
> - u32 rev = 0;
> -
> - ts = kzalloc(sizeof(struct tsc_data), GFP_KERNEL);
> - if (!ts) {
> - dev_err(dev, "cannot allocate device info\n");
> - return -ENOMEM;
> - }
> -
> - ts->dev = dev;
> - spin_lock_init(&ts->lock);
> - setup_timer(&ts->timer, tsc_poll, (unsigned long)ts);
> - platform_set_drvdata(pdev, ts);
> -
> - ts->tsc_irq = platform_get_irq(pdev, 0);
> - if (ts->tsc_irq < 0) {
> - dev_err(dev, "cannot determine device interrupt\n");
> - error = -ENODEV;
> - goto error_res;
> - }
> -
> - ts->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - if (!ts->res) {
> - dev_err(dev, "cannot determine register area\n");
> - error = -ENODEV;
> - goto error_res;
> - }
> -
> - if (!request_mem_region(ts->res->start, resource_size(ts->res),
> - pdev->name)) {
> - dev_err(dev, "cannot claim register memory\n");
> - ts->res = NULL;
> - error = -EINVAL;
> - goto error_res;
> - }
> -
> - ts->regs = ioremap(ts->res->start, resource_size(ts->res));
> - if (!ts->regs) {
> - dev_err(dev, "cannot map register memory\n");
> - error = -ENOMEM;
> - goto error_map;
> - }
> -
> - ts->clk = clk_get(dev, NULL);
> - if (IS_ERR(ts->clk)) {
> - dev_err(dev, "cannot claim device clock\n");
> - error = PTR_ERR(ts->clk);
> - goto error_clk;
> - }
> -
> - error = request_threaded_irq(ts->tsc_irq, NULL, tsc_irq, IRQF_ONESHOT,
> - dev_name(dev), ts);
> - if (error < 0) {
> - dev_err(ts->dev, "Could not allocate ts irq\n");
> - goto error_irq;
> - }
> -
> - ts->input_dev = input_allocate_device();
> - if (!ts->input_dev) {
> - dev_err(dev, "cannot allocate input device\n");
> - error = -ENOMEM;
> - goto error_input;
> - }
> - input_set_drvdata(ts->input_dev, ts);
> -
> - ts->input_dev->name = pdev->name;
> - ts->input_dev->id.bustype = BUS_HOST;
> - ts->input_dev->dev.parent = &pdev->dev;
> - ts->input_dev->open = tsc_start;
> - ts->input_dev->close = tsc_stop;
> -
> - clk_enable(ts->clk);
> - rev = tsc_read(ts, rev);
> - ts->input_dev->id.product = ((rev >> 8) & 0x07);
> - ts->input_dev->id.version = ((rev >> 16) & 0xfff);
> - clk_disable(ts->clk);
> -
> - __set_bit(EV_KEY, ts->input_dev->evbit);
> - __set_bit(EV_ABS, ts->input_dev->evbit);
> - __set_bit(BTN_TOUCH, ts->input_dev->keybit);
> -
> - input_set_abs_params(ts->input_dev, ABS_X, 0, 0xffff, 5, 0);
> - input_set_abs_params(ts->input_dev, ABS_Y, 0, 0xffff, 5, 0);
> - input_set_abs_params(ts->input_dev, ABS_PRESSURE, 0, 4095, 128, 0);
> -
> - error = input_register_device(ts->input_dev);
> - if (error < 0) {
> - dev_err(dev, "failed input device registration\n");
> - goto error_reg;
> - }
> -
> - return 0;
> -
> -error_reg:
> - input_free_device(ts->input_dev);
> -error_input:
> - free_irq(ts->tsc_irq, ts);
> -error_irq:
> - clk_put(ts->clk);
> -error_clk:
> - iounmap(ts->regs);
> -error_map:
> - release_mem_region(ts->res->start, resource_size(ts->res));
> -error_res:
> - kfree(ts);
> -
> - return error;
> -}
> -
> -static int tsc_remove(struct platform_device *pdev)
> -{
> - struct tsc_data *ts = platform_get_drvdata(pdev);
> -
> - input_unregister_device(ts->input_dev);
> - free_irq(ts->tsc_irq, ts);
> - clk_put(ts->clk);
> - iounmap(ts->regs);
> - release_mem_region(ts->res->start, resource_size(ts->res));
> - kfree(ts);
> -
> - return 0;
> -}
> -
> -static struct platform_driver tsc_driver = {
> - .probe = tsc_probe,
> - .remove = tsc_remove,
> - .driver.name = "tnetv107x-ts",
> - .driver.owner = THIS_MODULE,
> -};
> -module_platform_driver(tsc_driver);
> -
> -MODULE_AUTHOR("Cyril Chemparathy");
> -MODULE_DESCRIPTION("TNETV107X Touchscreen Driver");
> -MODULE_ALIAS("platform:tnetv107x-ts");
> -MODULE_LICENSE("GPL");
> --
> 1.8.3.2
>

--
Dmitry
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