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    SubjectRe: [PATCH] touchscreen: Cypress TTSP G3 MTDEV Core Driver
    Hi Kevin,

    On Tue, Nov 09, 2010 at 10:25:17AM -0800, Kevin McNeely wrote:
    >
    > +config TOUCHSCREEN_CYTTSP_CORE
    > + bool "Cypress TTSP touchscreen core"

    Tristate please - i see no reason why it can't be compiled as a module.
    Same goes for I2C and SPI parts.

    > + help
    > + Say Y here if you have a Cypress TTSP touchscreen
    > + connected to your system.
    > +
    > + If unsure, say N.
    > +

    To compile this driver as a module...

    > +
    > +/* Touch structure */
    > +struct cyttsp_touch {
    > + u16 x __attribute__ ((packed));
    > + u16 y __attribute__ ((packed));

    Why packed? Natural alignment will give exactly same layout.

    > +
    > +struct cyttsp {
    > + struct device *dev;
    > + int irq;
    > + struct input_dev *input;
    > + struct mutex mutex;
    > + char phys[32];
    > + struct bus_type *bus_type;

    const.

    > + struct cyttsp_platform_data *platform_data;

    const.

    > + struct cyttsp_xydata xy_data;
    > + struct cyttsp_bootloader_data bl_data;
    > + struct cyttsp_sysinfo_data sysinfo_data;
    > + struct cyttsp_trk prv_trk[CY_NUM_TRK_ID];
    > + struct cyttsp_tch tch_map[CY_NUM_TCH_ID];
    > + struct cyttsp_bus_ops *bus_ops;

    const.

    > + struct timer_list to_timer;
    > + bool bl_ready;
    > +};
    > +
    > +struct cyttsp_track_data {
    > + struct cyttsp_trk cur_trk[CY_NUM_TRK_ID];

    Do you expect to extend this? Otherwise just pass around struct
    cyttsp_trk *.

    > +
    > +static irqreturn_t cyttsp_bl_ready_irq(int irq, void *handle)
    > +{
    > + struct cyttsp *ts = handle;
    > +
    > + ts->bl_ready = true;
    > + return IRQ_HANDLED;
    > +}
    > +
    > +static int cyttsp_load_bl_regs(struct cyttsp *ts)
    > +{
    > + int retval;
    > +
    > + memset(&(ts->bl_data), 0, sizeof(struct cyttsp_bootloader_data));
    > +
    > + retval = ttsp_read_block_data(ts, CY_REG_BASE,
    > + sizeof(ts->bl_data), &(ts->bl_data));
    > +
    > + return retval;
    > +}
    > +
    > +static int cyttsp_bl_app_valid(struct cyttsp *ts)
    > +{
    > + int retval;
    > +
    > + retval = cyttsp_load_bl_regs(ts);
    > +
    > + if (retval < 0)
    > + return -ENODEV;
    > +
    > + if (GET_BOOTLOADERMODE(ts->bl_data.bl_status)) {
    > + if (IS_VALID_APP(ts->bl_data.bl_status)) {
    > + dev_dbg(ts->dev, "%s: App found; normal boot\n",
    > + __func__);
    > + return 0;
    > + } else {
    > + dev_dbg(ts->dev, "%s: NO APP; load firmware!!\n",
    > + __func__);
    > + return -ENODEV;
    > + }
    > + } else if (GET_HSTMODE(ts->bl_data.bl_file) == CY_OPERATE_MODE) {
    > + if (!(IS_OPERATIONAL_ERR(ts->bl_data.bl_status))) {
    > + dev_dbg(ts->dev, "%s: Operational\n",
    > + __func__);
    > + return 1;
    > + } else {
    > + dev_dbg(ts->dev, "%s: Operational failure\n",
    > + __func__);
    > + return -ENODEV;
    > + }
    > + } else {
    > + dev_dbg(ts->dev, "%s: Non-Operational failure\n",
    > + __func__);
    > + return -ENODEV;
    > + }
    > +
    > +}
    > +
    > +static bool cyttsp_wait_bl_ready(struct cyttsp *ts, int loop_delay, int max_try)
    > +{
    > + int tries = 0;
    > +
    > + ts->bl_ready = false; /* wait for interrupt to set ready flag */
    > +
    > + while (!ts->bl_ready && (tries++ < max_try))
    > + msleep(loop_delay);

    Ewwww! wait_event_timeout() or wait_for_completion_timeout().

    > +
    > +static int cyttsp_set_sysinfo_regs(struct cyttsp *ts)
    > +{
    > + int retval = 0;
    > +
    > + if ((ts->platform_data->act_intrvl != CY_ACT_INTRVL_DFLT) ||
    > + (ts->platform_data->tch_tmout != CY_TCH_TMOUT_DFLT) ||
    > + (ts->platform_data->lp_intrvl != CY_LP_INTRVL_DFLT)) {

    Too many parens.

    > +
    > +static int cyttsp_soft_reset(struct cyttsp *ts)
    > +{
    > + int retval;
    > + u8 cmd = CY_SOFT_RESET_MODE;
    > +
    > + /* enable bootloader interrupts */
    > + retval = request_irq(ts->irq, cyttsp_bl_ready_irq,
    > + IRQF_TRIGGER_FALLING, ts->platform_data->name, ts);
    > + if (retval)
    > + return retval;
    > +
    > + retval = ttsp_write_block_data(ts, CY_REG_BASE, sizeof(cmd), &cmd);
    > + if (!retval) {
    > + if (!cyttsp_wait_bl_ready(ts, 20, 100))
    > + retval = -ENODEV;
    > + else
    > + retval = 0;
    > + }

    Oh, yes, this should be a completion.

    > +
    > + free_irq(ts->irq, ts);
    > + return retval;
    > +}
    > +
    > +

    ...

    > +static void cyttsp_init_prv_trks(struct cyttsp *ts)
    > +{
    > + /* init the touch structures */
    > + memset(ts->prv_trk, CY_NTCH, sizeof(ts->prv_trk));
    > +}
    > +
    > +static void cyttsp_init_cur_trks(struct cyttsp_track_data *t)
    > +{
    > + memset(t->cur_trk, CY_NTCH, sizeof(t->cur_trk));
    > +}

    Do we really need these helpers?

    > +
    > +static int cyttsp_xy_worker(struct cyttsp *ts)
    > +{
    > + u8 cur_tch = 0;
    > + u8 tch;
    > + struct cyttsp_track_data trk;
    > +
    > + /* get event data from CYTTSP device */
    > + if (ttsp_read_block_data(ts,
    > + CY_REG_BASE, sizeof(struct cyttsp_xydata), &ts->xy_data))
    > + return 0;
    > +
    > + /* touch extension handling */
    > + if (ttsp_tch_ext(ts, &ts->xy_data))
    > + return 0;
    > +
    > + /* provide flow control handshake */
    > + if (ts->platform_data->use_hndshk)
    > + if (cyttsp_hndshk(ts, ts->xy_data.hst_mode))
    > + return 0;
    > +
    > + cur_tch = GET_NUM_TOUCHES(ts->xy_data.tt_stat);
    > +
    > + if (ts->bus_ops->power_state == CY_IDLE_STATE)
    > + return 0;
    > + else if (GET_BOOTLOADERMODE(ts->xy_data.tt_mode)) {
    > + return -1;
    > + } else if (IS_LARGE_AREA(ts->xy_data.tt_stat) == 1) {
    > + /* terminate all active tracks */
    > + cur_tch = CY_NTCH;
    > + dev_dbg(ts->dev, "%s: Large area detected\n", __func__);
    > + } else if (cur_tch > CY_NUM_TCH_ID) {
    > + /* terminate all active tracks */
    > + cur_tch = CY_NTCH;
    > + dev_dbg(ts->dev, "%s: Num touch error detected\n", __func__);
    > + } else if (IS_BAD_PKT(ts->xy_data.tt_mode)) {
    > + /* terminate all active tracks */
    > + cur_tch = CY_NTCH;
    > + dev_dbg(ts->dev, "%s: Invalid buffer detected\n", __func__);
    > + }
    > +
    > + /* process the touches */
    > + cyttsp_init_cur_trks(&trk);
    > +
    > + for (tch = 0; tch < cur_tch; tch++) {
    > + cyttsp_get_xydata(ts, &trk,
    > + tch & 0x01 ?
    > + (*(ts->tch_map[tch].id) & 0x0F) :
    > + (*(ts->tch_map[tch].id) & 0xF0) >> 4,
    > + CY_SMALL_TOOL_WIDTH,
    > + be16_to_cpu((ts->tch_map[tch].tch)->x),
    > + be16_to_cpu((ts->tch_map[tch].tch)->y),
    > + (ts->tch_map[tch].tch)->z);


    You know, open-coding instead of passing so many complex arguments would
    be cleaner.

    > + }
    > +
    > + handle_multi_touch(&trk, ts);
    > +
    > + return 0;
    > +}
    > +
    > +static irqreturn_t cyttsp_irq(int irq, void *handle)
    > +{
    > + struct cyttsp *ts = handle;
    > + int retval;
    > +
    > + retval = cyttsp_xy_worker(ts);
    > +
    > + if (retval < 0) {
    > + /* TTSP device has reset back to bootloader mode
    > + * Reset driver touch history and restore operational mode
    > + */
    > + cyttsp_init_prv_trks(ts);
    > + retval = cyttsp_exit_bl_mode(ts);
    > + if (retval)
    > + ts->bus_ops->power_state = CY_IDLE_STATE;
    > + dev_info(ts->dev, "%s: %s\n",
    > + __func__,
    > + (ts->bus_ops->power_state == CY_ACTIVE_STATE) ?
    > + "ACTIVE" : "IDLE");
    > + }
    > + return IRQ_HANDLED;
    > +}
    > +
    > +static int cyttsp_power_on(struct cyttsp *ts)
    > +{
    > + int retval = 0;
    > +
    > + ts->bus_ops->power_state = CY_IDLE_STATE;
    > +
    > + retval = cyttsp_bl_app_valid(ts);
    > + if (retval < 0)
    > + goto bypass;
    > + else if (retval > 0) {
    > + retval = cyttsp_soft_reset(ts);
    > + if (retval < 0)
    > + goto bypass;
    > + }
    > +
    > + retval = cyttsp_exit_bl_mode(ts);
    > + if (retval < 0)
    > + goto bypass;
    > +
    > + retval = cyttsp_set_sysinfo_mode(ts);
    > + if (retval < 0)
    > + goto bypass;
    > +
    > + retval = cyttsp_set_sysinfo_regs(ts);
    > + if (retval < 0)
    > + goto bypass;
    > +
    > + retval = cyttsp_set_operational_mode(ts);
    > + if (retval < 0)
    > + goto bypass;
    > +
    > + /* enable touch interrupts */
    > + retval = request_threaded_irq(ts->irq, NULL, cyttsp_irq,
    > + IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
    > + ts->platform_data->name, ts);
    > + if (retval < 0)
    > + goto bypass;
    > +
    > + /* init gesture setup; required for active distance */
    > + retval = cyttsp_gesture_setup(ts);
    > +
    > +bypass:
    > + if (!retval)
    > + ts->bus_ops->power_state = CY_ACTIVE_STATE;
    > +
    > + dev_info(ts->dev, "%s: %s\n",
    > + __func__,
    > + (ts->bus_ops->power_state == CY_ACTIVE_STATE) ?
    > + "ACTIVE" : "IDLE");
    > + return retval;
    > +}
    > +
    > +#ifdef CONFIG_PM
    > +int cyttsp_resume(void *handle)
    > +{
    > + struct cyttsp *ts = handle;
    > + int retval = 0;
    > + struct cyttsp_xydata xydata;
    > +
    > + if (ts->platform_data->use_sleep && (ts->bus_ops->power_state !=
    > + CY_ACTIVE_STATE)) {
    > + if (ts->platform_data->wakeup) {
    > + retval = ts->platform_data->wakeup();
    > + if (retval < 0)
    > + dev_dbg(ts->dev, "%s: Error, wakeup failed!\n",
    > + __func__);
    > + } else {
    > + dev_dbg(ts->dev, "%s: Error, wakeup not implemented "
    > + "(check board file).\n", __func__);
    > + retval = -ENOSYS;
    > + }
    > + if (!(retval < 0)) {
    > + retval = ttsp_read_block_data(ts, CY_REG_BASE,
    > + sizeof(xydata), &xydata);
    > + if (!(retval < 0) && !GET_HSTMODE(xydata.hst_mode))
    > + ts->bus_ops->power_state = CY_ACTIVE_STATE;
    > + }
    > + }
    > + dev_dbg(ts->dev, "%s: Wake Up %s\n", __func__,
    > + (retval < 0) ? "FAIL" : "PASS");
    > + return retval;
    > +}
    > +EXPORT_SYMBOL_GPL(cyttsp_resume);
    > +
    > +int cyttsp_suspend(void *handle)
    > +{
    > + struct cyttsp *ts = handle;
    > + u8 sleep_mode = 0;
    > + int retval = 0;
    > +
    > + if (ts->platform_data->use_sleep &&
    > + (ts->bus_ops->power_state == CY_ACTIVE_STATE)) {
    > + sleep_mode = CY_DEEP_SLEEP_MODE;
    > + retval = ttsp_write_block_data(ts,
    > + CY_REG_BASE, sizeof(sleep_mode), &sleep_mode);
    > + if (!(retval < 0))
    > + ts->bus_ops->power_state = CY_SLEEP_STATE;
    > + }
    > + dev_dbg(ts->dev, "%s: Sleep Power state is %s\n", __func__,
    > + (ts->bus_ops->power_state == CY_ACTIVE_STATE) ?
    > + "ACTIVE" :
    > + ((ts->bus_ops->power_state == CY_SLEEP_STATE) ?
    > + "SLEEP" : "LOW POWER"));
    > + return retval;
    > +}
    > +EXPORT_SYMBOL_GPL(cyttsp_suspend);
    > +#endif
    > +
    > +int cyttsp_core_init(struct cyttsp_bus_ops *bus_ops,
    > + struct device *dev, void *handle)
    > +{
    > + struct input_dev *input_device;
    > + struct cyttsp *ts;
    > + int retval = 0;
    > +
    > + if ((dev == NULL) || (bus_ops == NULL))
    > + goto error_alloc_data;
    > +
    > + ts = kzalloc(sizeof(*ts), GFP_KERNEL);
    > + if (ts == NULL) {
    > + dev_dbg(ts->dev, "%s: Error, kzalloc\n", __func__);
    > + retval = -ENOMEM;
    > + goto error_alloc_data;
    > + }
    > + mutex_init(&ts->mutex);
    > + ts->dev = dev;
    > + ts->platform_data = dev->platform_data;
    > + ts->bus_ops = bus_ops;
    > + ts->platform_data->dev = ts->dev;
    > +
    > + if (ts->platform_data->init) {
    > + retval = ts->platform_data->init(ts->platform_data, 1);
    > + if (retval) {
    > + dev_dbg(ts->dev, "%s: Error, platform init failed!\n",
    > + __func__);
    > + retval = -EIO;
    > + goto error_init;
    > + }
    > + }
    > +
    > + ts->irq = gpio_to_irq(ts->platform_data->irq_gpio);
    > + if (ts->irq <= 0) {
    > + dev_dbg(ts->dev, "%s: Error, failed to allocate irq\n",
    > + __func__);
    > + retval = -EIO;
    > + goto error_init;
    > + }
    > +
    > + /* Create the input device and register it. */
    > + input_device = input_allocate_device();
    > + if (!input_device) {
    > + retval = -ENOMEM;
    > + dev_dbg(ts->dev, "%s: Error, failed to allocate input device\n",
    > + __func__);
    > + retval = -ENODEV;
    > + goto error_input_allocate_device;
    > + }
    > +
    > + ts->input = input_device;
    > + input_device->name = ts->platform_data->name;
    > + input_device->phys = ts->phys;
    > + input_device->dev.parent = ts->dev;
    > + ts->bus_type = bus_ops->dev->bus;
    > +
    > + cyttsp_init_tch_map(ts);
    > + cyttsp_init_prv_trks(ts);
    > +
    > + __set_bit(EV_SYN, input_device->evbit);
    > + __set_bit(EV_KEY, input_device->evbit);
    > + __set_bit(EV_ABS, input_device->evbit);
    > +
    > + input_set_abs_params(input_device, ABS_MT_POSITION_X,
    > + 0, ts->platform_data->maxx, 0, 0);
    > + input_set_abs_params(input_device, ABS_MT_POSITION_Y,
    > + 0, ts->platform_data->maxy, 0, 0);
    > + input_set_abs_params(input_device, ABS_MT_TOUCH_MAJOR,
    > + 0, CY_MAXZ, 0, 0);
    > + input_set_abs_params(input_device, ABS_MT_WIDTH_MAJOR,
    > + 0, CY_LARGE_TOOL_WIDTH, 0, 0);
    > + input_set_abs_params(input_device, ABS_MT_TRACKING_ID,
    > + 0, CY_NUM_TRK_ID, 0, 0);
    > +
    > + retval = input_register_device(input_device);
    > + if (retval) {
    > + dev_dbg(ts->dev, "%s: Error, failed to register input device\n",
    > + __func__);
    > + retval = -ENODEV;
    > + goto error_input_register_device;
    > + }
    > +
    > + retval = cyttsp_power_on(ts);

    This should probably go into input->open() method. No need to power up
    until there are users.

    > +
    > + if (retval < 0) {
    > + dev_dbg(ts->dev, "%s: Error, power on failed!\n", __func__);
    > + retval = -ENODEV;
    > + goto error_power_on;
    > + }
    > +
    > + handle = ts;
    > + goto no_error;
    > +
    > +error_power_on:
    > + free_irq(ts->irq, ts);
    > +error_input_register_device:
    > + input_unregister_device(input_device);
    > +error_input_allocate_device:
    > + if (ts->platform_data->init)
    > + ts->platform_data->init(ts->platform_data, 0);
    > +error_init:
    > + mutex_destroy(&ts->mutex);
    > + kfree(ts);
    > +error_alloc_data:
    > + handle = NULL;

    Why?

    Btw, have it return struct cyttsp * and check for errors with IS_ERR().

    > +no_error:
    > + return retval;
    > +}
    > +EXPORT_SYMBOL_GPL(cyttsp_core_init);
    > +
    > +/* registered in driver struct */
    > +void cyttsp_core_release(void *handle)
    > +{
    > + struct cyttsp *ts = handle;
    > +
    > + mutex_destroy(&ts->mutex);
    > + free_irq(ts->irq, ts);
    > + input_unregister_device(ts->input);
    > + if (ts->platform_data->init)
    > + ts->platform_data->init(ts->platform_data, 0);

    Maybe call it platform_data->exit()?

    > + kfree(ts);
    > +}
    > +EXPORT_SYMBOL_GPL(cyttsp_core_release);
    > +
    > +MODULE_LICENSE("GPL");
    > +MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard touchscreen driver core");
    > +MODULE_AUTHOR("Cypress");
    > +
    > diff --git a/drivers/input/touchscreen/cyttsp_core.h b/drivers/input/touchscreen/cyttsp_core.h
    > new file mode 100644
    > index 0000000..43fe438
    > --- /dev/null
    > +++ b/drivers/input/touchscreen/cyttsp_core.h
    > @@ -0,0 +1,55 @@
    > +/* Header file for:
    > + * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
    > + * For use with Cypress Txx3xx parts.
    > + * Supported parts include:
    > + * CY8CTST341
    > + * CY8CTMA340
    > + *
    > + * Copyright (C) 2009, 2010 Cypress Semiconductor, Inc.
    > + *
    > + * This program is free software; you can redistribute it and/or
    > + * modify it under the terms of the GNU General Public License
    > + * version 2, and only version 2, as published by the
    > + * Free Software Foundation.
    > + *
    > + * This program is distributed in the hope that it will be useful,
    > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    > + * GNU General Public License for more details.
    > + *
    > + * You should have received a copy of the GNU General Public License along
    > + * with this program; if not, write to the Free Software Foundation, Inc.,
    > + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
    > + *
    > + * Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com>
    > + *
    > + */
    > +
    > +
    > +#ifndef __CYTTSP_CORE_H__
    > +#define __CYTTSP_CORE_H__
    > +
    > +#include <linux/kernel.h>
    > +#include <linux/input/cyttsp.h>
    > +
    > +#define CY_NUM_RETRY 4 /* max number of retries for read ops */
    > +
    > +
    > +struct cyttsp_bus_ops {
    > + s32 (*write)(void *handle, u8 addr, u8 length, const void *values);
    > + s32 (*read)(void *handle, u8 addr, u8 length, void *values);
    > + s32 (*ext)(void *handle, void *values);
    > + struct device *dev;
    > + enum cyttsp_powerstate power_state;
    > +};
    > +
    > +int cyttsp_core_init(struct cyttsp_bus_ops *bus_ops,
    > + struct device *dev, void *handle);
    > +
    > +void cyttsp_core_release(void *handle);
    > +#ifdef CONFIG_PM
    > +int cyttsp_resume(void *handle);
    > +int cyttsp_suspend(void *handle);
    > +#endif
    > +
    > +#endif /* __CYTTSP_CORE_H__ */
    > diff --git a/include/linux/input/cyttsp.h b/include/linux/input/cyttsp.h
    > new file mode 100644
    > index 0000000..5280252
    > --- /dev/null
    > +++ b/include/linux/input/cyttsp.h
    > @@ -0,0 +1,78 @@
    > +/* Header file for:
    > + * Cypress TrueTouch(TM) Standard Product (TTSP) touchscreen drivers.
    > + * For use with Cypress Txx3xx parts.
    > + * Supported parts include:
    > + * CY8CTST341
    > + * CY8CTMA340
    > + *
    > + * Copyright (C) 2009, 2010 Cypress Semiconductor, Inc.
    > + *
    > + * This program is free software; you can redistribute it and/or
    > + * modify it under the terms of the GNU General Public License
    > + * version 2, and only version 2, as published by the
    > + * Free Software Foundation.
    > + *
    > + * This program is distributed in the hope that it will be useful,
    > + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    > + * GNU General Public License for more details.
    > + *
    > + * You should have received a copy of the GNU General Public License along
    > + * with this program; if not, write to the Free Software Foundation, Inc.,
    > + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
    > + *
    > + * Contact Cypress Semiconductor at www.cypress.com (kev@cypress.com)
    > + *
    > + */
    > +#ifndef _CYTTSP_H_
    > +#define _CYTTSP_H_
    > +
    > +#define CY_SPI_NAME "cyttsp-spi"
    > +#define CY_I2C_NAME "cyttsp-i2c"
    > +/* Active Power state scanning/processing refresh interval */
    > +#define CY_ACT_INTRVL_DFLT 0x00
    > +/* touch timeout for the Active power */
    > +#define CY_TCH_TMOUT_DFLT 0xFF
    > +/* Low Power state scanning/processing refresh interval */
    > +#define CY_LP_INTRVL_DFLT 0x0A
    > +/*
    > + * Active distance in pixels for a gesture to be reported
    > + * if set to 0, then all gesture movements are reported
    > + * Valid range is 0 - 15
    > + */
    > +#define CY_ACT_DIST_DFLT 8
    > +#define CY_ACT_DIST CY_ACT_DIST_DFLT
    > +
    > +enum cyttsp_gest {
    > + CY_GEST_GRP_NONE = 0,
    > + CY_GEST_GRP1 = 0x10,
    > + CY_GEST_GRP2 = 0x20,
    > + CY_GEST_GRP3 = 0x40,
    > + CY_GEST_GRP4 = 0x80,
    > +};
    > +
    > +enum cyttsp_powerstate {
    > + CY_IDLE_STATE,
    > + CY_ACTIVE_STATE,
    > + CY_LOW_PWR_STATE,
    > + CY_SLEEP_STATE,
    > +};
    > +
    > +struct cyttsp_platform_data {
    > + struct device *dev;
    Hm, platform data might be shared, not a good idea to have device
    pointer here.

    > + u32 maxx;
    > + u32 maxy;
    > + unsigned use_hndshk:1;

    bool.

    > + unsigned use_sleep:1;

    bool.

    > + u8 gest_set; /* Active distance */
    > + u8 act_intrvl; /* Active refresh interval; ms */
    > + u8 tch_tmout; /* Active touch timeout; ms */
    > + u8 lp_intrvl; /* Low power refresh interval; ms */
    > + int (*wakeup)(void);
    > + int (*init)(struct cyttsp_platform_data *, int on_off);
    > + char *name;
    > + s16 irq_gpio;
    > + u8 *bl_keys;
    > +};
    > +

    Thanks.

    --
    Dmitry


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