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Release 4.11 drivers/input/misc/ad714x-spi.c

/*
 * AD714X CapTouch Programmable Controller driver (SPI bus)
 *
 * Copyright 2009-2011 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/input.h>	/* BUS_SPI */
#include <linux/module.h>
#include <linux/spi/spi.h>
#include <linux/pm.h>
#include <linux/types.h>
#include "ad714x.h"


#define AD714x_SPI_CMD_PREFIX      0xE000   
/* bits 15:11 */

#define AD714x_SPI_READ            BIT(10)


static int __maybe_unused ad714x_spi_suspend(struct device *dev) { return ad714x_disable(spi_get_drvdata(to_spi_device(dev))); }

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Bryan Wu1770.83%133.33%
Mark Brown625.00%133.33%
Jingoo Han14.17%133.33%
Total24100.00%3100.00%


static int __maybe_unused ad714x_spi_resume(struct device *dev) { return ad714x_enable(spi_get_drvdata(to_spi_device(dev))); }

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Bryan Wu1770.83%133.33%
Mark Brown625.00%133.33%
Jingoo Han14.17%133.33%
Total24100.00%3100.00%

static SIMPLE_DEV_PM_OPS(ad714x_spi_pm, ad714x_spi_suspend, ad714x_spi_resume);
static int ad714x_spi_read(struct ad714x_chip *chip, unsigned short reg, unsigned short *data, size_t len) { struct spi_device *spi = to_spi_device(chip->dev); struct spi_message message; struct spi_transfer xfer[2]; int i; int error; spi_message_init(&message); memset(xfer, 0, sizeof(xfer)); chip->xfer_buf[0] = cpu_to_be16(AD714x_SPI_CMD_PREFIX | AD714x_SPI_READ | reg); xfer[0].tx_buf = &chip->xfer_buf[0]; xfer[0].len = sizeof(chip->xfer_buf[0]); spi_message_add_tail(&xfer[0], &message); xfer[1].rx_buf = &chip->xfer_buf[1]; xfer[1].len = sizeof(chip->xfer_buf[1]) * len; spi_message_add_tail(&xfer[1], &message); error = spi_sync(spi, &message); if (unlikely(error)) { dev_err(chip->dev, "SPI read error: %d\n", error); return error; } for (i = 0; i < len; i++) data[i] = be16_to_cpu(chip->xfer_buf[i + 1]); return 0; }

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Dmitry Torokhov16467.77%125.00%
Bryan Wu4116.94%125.00%
Michael Hennerich3715.29%250.00%
Total242100.00%4100.00%


static int ad714x_spi_write(struct ad714x_chip *chip, unsigned short reg, unsigned short data) { struct spi_device *spi = to_spi_device(chip->dev); int error; chip->xfer_buf[0] = cpu_to_be16(AD714x_SPI_CMD_PREFIX | reg); chip->xfer_buf[1] = cpu_to_be16(data); error = spi_write(spi, (u8 *)chip->xfer_buf, 2 * sizeof(*chip->xfer_buf)); if (unlikely(error)) { dev_err(chip->dev, "SPI write error: %d\n", error); return error; } return 0; }

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Dmitry Torokhov6255.86%133.33%
Bryan Wu4338.74%133.33%
Michael Hennerich65.41%133.33%
Total111100.00%3100.00%


static int ad714x_spi_probe(struct spi_device *spi) { struct ad714x_chip *chip; int err; spi->bits_per_word = 8; err = spi_setup(spi); if (err < 0) return err; chip = ad714x_probe(&spi->dev, BUS_SPI, spi->irq, ad714x_spi_read, ad714x_spi_write); if (IS_ERR(chip)) return PTR_ERR(chip); spi_set_drvdata(spi, chip); return 0; }

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Bryan Wu5970.24%150.00%
Michael Hennerich2529.76%150.00%
Total84100.00%2100.00%

static struct spi_driver ad714x_spi_driver = { .driver = { .name = "ad714x_captouch", .pm = &ad714x_spi_pm, }, .probe = ad714x_spi_probe, }; module_spi_driver(ad714x_spi_driver); MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor SPI Bus Driver"); MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); MODULE_LICENSE("GPL");

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Bryan Wu24442.66%112.50%
Dmitry Torokhov22639.51%112.50%
Michael Hennerich7012.24%337.50%
Mark Brown295.07%112.50%
Jingoo Han20.35%112.50%
Axel Lin10.17%112.50%
Total572100.00%8100.00%
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