3e069adabc
Pull input updates from Dmitry Torokhov:
"Items of note:
- evdev users can now limit or mask the kind of events they will
receive. This will allow applications such as power manager or
network manager to only be woken when user presses special keys
such as KEY_POWER or KEY_WIFI and not be bothered with ordinary
key presses coming from keyboard
- support for FocalTech FT6236 touchscreen controller
- support for ROHM BU21023/24 touchscreen controller
- edt-ft5x06 touchscreen driver got a face lift and can now be used
with FT5506
- support for Google Fiber TV Box remote controls
- improvements in xpad driver (with more to come)
- several parport-based drivers have been switched to the new device
model
- other miscellaneous driver improvements"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (70 commits)
HID: hid-gfrm: avoid warning for input_configured API change
HID: hid-input: allow input_configured callback return errors
Input: evdev - fix bug in checking duplicate clock change request
Input: add userio module
Input: evdev - add event-mask API
Input: snvs_pwrkey - remove duplicated semicolon
HID: hid-gfrm: Google Fiber TV Box remote controls
Input: e3x0-button - update Kconfig description
Input: tegra-kbc - drop use of IRQF_NO_SUSPEND flag
Input: tegra-kbc - enable support for the standard "wakeup-source" property
Input: xen - check return value of xenbus_printf
Input: hp_sdc_rtc - fix y2038 problem in proc_show
Input: nomadik-ske-keypad - fix a trivial typo
Input: xpad - fix clash of presence handling with LED setting
Input: edt-ft5x06 - work around FT5506 firmware bug
Input: edt-ft5x06 - add support for FT5506
Input: edt-ft5x06 - add support for different max support points
Input: edt-ft5x06 - use max support points to determine how much to read
Input: rotary-encoder - add support for quarter-period mode
Input: rotary-encoder - use of_property_read_bool
...
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*
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* AD714X CapTouch Programmable Controller driver (SPI bus)
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*
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* Copyright 2009-2011 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/input.h> /* BUS_SPI */
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <linux/pm.h>
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#include <linux/types.h>
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#include "ad714x.h"
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#define AD714x_SPI_CMD_PREFIX 0xE000 /* bits 15:11 */
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#define AD714x_SPI_READ BIT(10)
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static int __maybe_unused ad714x_spi_suspend(struct device *dev)
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{
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return ad714x_disable(spi_get_drvdata(to_spi_device(dev)));
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}
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static int __maybe_unused ad714x_spi_resume(struct device *dev)
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{
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return ad714x_enable(spi_get_drvdata(to_spi_device(dev)));
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}
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static SIMPLE_DEV_PM_OPS(ad714x_spi_pm, ad714x_spi_suspend, ad714x_spi_resume);
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static int ad714x_spi_read(struct ad714x_chip *chip,
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unsigned short reg, unsigned short *data, size_t len)
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{
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struct spi_device *spi = to_spi_device(chip->dev);
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struct spi_message message;
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struct spi_transfer xfer[2];
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int i;
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int error;
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spi_message_init(&message);
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memset(xfer, 0, sizeof(xfer));
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chip->xfer_buf[0] = cpu_to_be16(AD714x_SPI_CMD_PREFIX |
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AD714x_SPI_READ | reg);
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xfer[0].tx_buf = &chip->xfer_buf[0];
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xfer[0].len = sizeof(chip->xfer_buf[0]);
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spi_message_add_tail(&xfer[0], &message);
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xfer[1].rx_buf = &chip->xfer_buf[1];
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xfer[1].len = sizeof(chip->xfer_buf[1]) * len;
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spi_message_add_tail(&xfer[1], &message);
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error = spi_sync(spi, &message);
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if (unlikely(error)) {
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dev_err(chip->dev, "SPI read error: %d\n", error);
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return error;
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}
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for (i = 0; i < len; i++)
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data[i] = be16_to_cpu(chip->xfer_buf[i + 1]);
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return 0;
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}
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static int ad714x_spi_write(struct ad714x_chip *chip,
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unsigned short reg, unsigned short data)
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{
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struct spi_device *spi = to_spi_device(chip->dev);
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int error;
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chip->xfer_buf[0] = cpu_to_be16(AD714x_SPI_CMD_PREFIX | reg);
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chip->xfer_buf[1] = cpu_to_be16(data);
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error = spi_write(spi, (u8 *)chip->xfer_buf,
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2 * sizeof(*chip->xfer_buf));
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if (unlikely(error)) {
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dev_err(chip->dev, "SPI write error: %d\n", error);
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return error;
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}
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return 0;
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}
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static int ad714x_spi_probe(struct spi_device *spi)
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{
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struct ad714x_chip *chip;
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int err;
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spi->bits_per_word = 8;
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err = spi_setup(spi);
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if (err < 0)
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return err;
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chip = ad714x_probe(&spi->dev, BUS_SPI, spi->irq,
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ad714x_spi_read, ad714x_spi_write);
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if (IS_ERR(chip))
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return PTR_ERR(chip);
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spi_set_drvdata(spi, chip);
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return 0;
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}
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static struct spi_driver ad714x_spi_driver = {
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.driver = {
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.name = "ad714x_captouch",
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.pm = &ad714x_spi_pm,
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},
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.probe = ad714x_spi_probe,
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};
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module_spi_driver(ad714x_spi_driver);
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MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor SPI Bus Driver");
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MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
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MODULE_LICENSE("GPL");
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