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Release 4.11 drivers/input/misc/adxl34x-spi.c

/*
 * ADLX345/346 Three-Axis Digital Accelerometers (SPI Interface)
 *
 * Enter bugs at http://blackfin.uclinux.org/
 *
 * Copyright (C) 2009 Michael Hennerich, 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 "adxl34x.h"


#define MAX_SPI_FREQ_HZ		5000000

#define MAX_FREQ_NO_FIFODELAY	1500000

#define ADXL34X_CMD_MULTB	(1 << 6)

#define ADXL34X_CMD_READ	(1 << 7)

#define ADXL34X_WRITECMD(reg)	(reg & 0x3F)

#define ADXL34X_READCMD(reg)	(ADXL34X_CMD_READ | (reg & 0x3F))

#define ADXL34X_READMB_CMD(reg) (ADXL34X_CMD_READ | ADXL34X_CMD_MULTB \
                                        | (reg & 0x3F))


static int adxl34x_spi_read(struct device *dev, unsigned char reg) { struct spi_device *spi = to_spi_device(dev); unsigned char cmd; cmd = ADXL34X_READCMD(reg); return spi_w8r8(spi, cmd); }

Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich44100.00%1100.00%
Total44100.00%1100.00%


static int adxl34x_spi_write(struct device *dev, unsigned char reg, unsigned char val) { struct spi_device *spi = to_spi_device(dev); unsigned char buf[2]; buf[0] = ADXL34X_WRITECMD(reg); buf[1] = val; return spi_write(spi, buf, sizeof(buf)); }

Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich66100.00%1100.00%
Total66100.00%1100.00%


static int adxl34x_spi_read_block(struct device *dev, unsigned char reg, int count, void *buf) { struct spi_device *spi = to_spi_device(dev); ssize_t status; reg = ADXL34X_READMB_CMD(reg); status = spi_write_then_read(spi, &reg, 1, buf, count); return (status < 0) ? status : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich69100.00%1100.00%
Total69100.00%1100.00%

static const struct adxl34x_bus_ops adxl34x_spi_bops = { .bustype = BUS_SPI, .write = adxl34x_spi_write, .read = adxl34x_spi_read, .read_block = adxl34x_spi_read_block, };
static int adxl34x_spi_probe(struct spi_device *spi) { struct adxl34x *ac; /* don't exceed max specified SPI CLK frequency */ if (spi->max_speed_hz > MAX_SPI_FREQ_HZ) { dev_err(&spi->dev, "SPI CLK %d Hz too fast\n", spi->max_speed_hz); return -EINVAL; } ac = adxl34x_probe(&spi->dev, spi->irq, spi->max_speed_hz > MAX_FREQ_NO_FIFODELAY, &adxl34x_spi_bops); if (IS_ERR(ac)) return PTR_ERR(ac); spi_set_drvdata(spi, ac); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich9098.90%150.00%
Mark Brown11.10%150.00%
Total91100.00%2100.00%


static int adxl34x_spi_remove(struct spi_device *spi) { struct adxl34x *ac = spi_get_drvdata(spi); return adxl34x_remove(ac); }

Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich2696.30%150.00%
Jingoo Han13.70%150.00%
Total27100.00%2100.00%


static int __maybe_unused adxl34x_spi_suspend(struct device *dev) { struct spi_device *spi = to_spi_device(dev); struct adxl34x *ac = spi_get_drvdata(spi); adxl34x_suspend(ac); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich2460.00%120.00%
Mark Brown1230.00%120.00%
Jingoo Han25.00%240.00%
Dmitry Torokhov25.00%120.00%
Total40100.00%5100.00%


static int __maybe_unused adxl34x_spi_resume(struct device *dev) { struct spi_device *spi = to_spi_device(dev); struct adxl34x *ac = spi_get_drvdata(spi); adxl34x_resume(ac); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich2460.00%120.00%
Mark Brown1230.00%120.00%
Jingoo Han25.00%240.00%
Dmitry Torokhov25.00%120.00%
Total40100.00%5100.00%

static SIMPLE_DEV_PM_OPS(adxl34x_spi_pm, adxl34x_spi_suspend, adxl34x_spi_resume); static struct spi_driver adxl34x_driver = { .driver = { .name = "adxl34x", .pm = &adxl34x_spi_pm, }, .probe = adxl34x_spi_probe, .remove = adxl34x_spi_remove, }; module_spi_driver(adxl34x_driver); MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer SPI Bus Driver"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Michael Hennerich47289.90%114.29%
Mark Brown438.19%228.57%
Jingoo Han50.95%228.57%
Dmitry Torokhov40.76%114.29%
Axel Lin10.19%114.29%
Total525100.00%7100.00%
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