cregit-Linux how code gets into the kernel

Release 4.11 drivers/hwmon/mc13783-adc.c

Directory: drivers/hwmon
/*
 * Driver for the ADC on Freescale Semiconductor MC13783 and MC13892 PMICs.
 *
 * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
 * Copyright (C) 2009 Sascha Hauer, Pengutronix
 *
 * 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; either version 2
 * of the License, or (at your option) any later version.
 * 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 St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <linux/mfd/mc13xxx.h>
#include <linux/platform_device.h>
#include <linux/hwmon-sysfs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/hwmon.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/err.h>


#define DRIVER_NAME	"mc13783-adc"

/* platform device id driver data */

#define MC13783_ADC_16CHANS	1

#define MC13783_ADC_BPDIV2	2


struct mc13783_adc_priv {
	
struct mc13xxx *mc13xxx;
	
struct device *hwmon_dev;
	
char name[PLATFORM_NAME_SIZE];
};


static ssize_t name_show(struct device *dev, struct device_attribute *devattr, char *buf) { struct mc13783_adc_priv *priv = dev_get_drvdata(dev); return sprintf(buf, "%s\n", priv->name); }

Contributors

PersonTokensPropCommitsCommitProp
Luotao Fu2661.90%133.33%
Uwe Kleine-König1535.71%133.33%
Julia Lawall12.38%133.33%
Total42100.00%3100.00%


static int mc13783_adc_read(struct device *dev, struct device_attribute *devattr, unsigned int *val) { struct mc13783_adc_priv *priv = dev_get_drvdata(dev); struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr); unsigned int channel = attr->index; unsigned int sample[4]; int ret; ret = mc13xxx_adc_do_conversion(priv->mc13xxx, MC13XXX_ADC_MODE_MULT_CHAN, channel, 0, 0, sample); if (ret) return ret; channel &= 0x7; *val = (sample[channel % 4] >> (channel > 3 ? 14 : 2)) & 0x3ff; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Luotao Fu10792.24%125.00%
Uwe Kleine-König54.31%250.00%
Michael Thalmeier43.45%125.00%
Total116100.00%4100.00%


static ssize_t mc13783_adc_read_bp(struct device *dev, struct device_attribute *devattr, char *buf) { unsigned val; struct platform_device *pdev = to_platform_device(dev); kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data; int ret = mc13783_adc_read(dev, devattr, &val); if (ret) return ret; if (driver_data & MC13783_ADC_BPDIV2) val = DIV_ROUND_CLOSEST(val * 9, 2); else /* * BP (channel 2) reports with offset 2.4V to the actual value * to fit the input range of the ADC. unit = 2.25mV = 9/4 mV. */ val = DIV_ROUND_CLOSEST(val * 9, 4) + 2400; return sprintf(buf, "%u\n", val); }

Contributors

PersonTokensPropCommitsCommitProp
Luotao Fu6662.86%150.00%
Uwe Kleine-König3937.14%150.00%
Total105100.00%2100.00%


static ssize_t mc13783_adc_read_gp(struct device *dev, struct device_attribute *devattr, char *buf) { unsigned val; int ret = mc13783_adc_read(dev, devattr, &val); if (ret) return ret; /* * input range is [0, 2.3V], val has 10 bits, so each bit * is worth 9/4 mV. */ val = DIV_ROUND_CLOSEST(val * 9, 4); return sprintf(buf, "%u\n", val); }

Contributors

PersonTokensPropCommitsCommitProp
Luotao Fu65100.00%1100.00%
Total65100.00%1100.00%

static DEVICE_ATTR_RO(name); static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, mc13783_adc_read_bp, NULL, 2); static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, mc13783_adc_read_gp, NULL, 5); static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, mc13783_adc_read_gp, NULL, 6); static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, mc13783_adc_read_gp, NULL, 7); static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, mc13783_adc_read_gp, NULL, 8); static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, mc13783_adc_read_gp, NULL, 9); static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, mc13783_adc_read_gp, NULL, 10); static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, mc13783_adc_read_gp, NULL, 11); static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, mc13783_adc_read_gp, NULL, 12); static SENSOR_DEVICE_ATTR(in13_input, S_IRUGO, mc13783_adc_read_gp, NULL, 13); static SENSOR_DEVICE_ATTR(in14_input, S_IRUGO, mc13783_adc_read_gp, NULL, 14); static SENSOR_DEVICE_ATTR(in15_input, S_IRUGO, mc13783_adc_read_gp, NULL, 15); static struct attribute *mc13783_attr_base[] = { &dev_attr_name.attr, &sensor_dev_attr_in2_input.dev_attr.attr, &sensor_dev_attr_in5_input.dev_attr.attr, &sensor_dev_attr_in6_input.dev_attr.attr, &sensor_dev_attr_in7_input.dev_attr.attr, NULL }; static const struct attribute_group mc13783_group_base = { .attrs = mc13783_attr_base, }; /* these are only used if MC13783_ADC_16CHANS is provided in driver data */ static struct attribute *mc13783_attr_16chans[] = { &sensor_dev_attr_in8_input.dev_attr.attr, &sensor_dev_attr_in9_input.dev_attr.attr, &sensor_dev_attr_in10_input.dev_attr.attr, &sensor_dev_attr_in11_input.dev_attr.attr, NULL }; static const struct attribute_group mc13783_group_16chans = { .attrs = mc13783_attr_16chans, }; /* last four channels may be occupied by the touchscreen */ static struct attribute *mc13783_attr_ts[] = { &sensor_dev_attr_in12_input.dev_attr.attr, &sensor_dev_attr_in13_input.dev_attr.attr, &sensor_dev_attr_in14_input.dev_attr.attr, &sensor_dev_attr_in15_input.dev_attr.attr, NULL }; static const struct attribute_group mc13783_group_ts = { .attrs = mc13783_attr_ts, };
static int mc13783_adc_use_touchscreen(struct platform_device *pdev) { struct mc13783_adc_priv *priv = platform_get_drvdata(pdev); unsigned flags = mc13xxx_get_flags(priv->mc13xxx); return flags & MC13XXX_USE_TOUCHSCREEN; }

Contributors

PersonTokensPropCommitsCommitProp
Uwe Kleine-König36100.00%2100.00%
Total36100.00%2100.00%


static int __init mc13783_adc_probe(struct platform_device *pdev) { struct mc13783_adc_priv *priv; int ret; const struct platform_device_id *id = platform_get_device_id(pdev); char *dash; priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->mc13xxx = dev_get_drvdata(pdev->dev.parent); snprintf(priv->name, ARRAY_SIZE(priv->name), "%s", id->name); dash = strchr(priv->name, '-'); if (dash) *dash = '\0'; platform_set_drvdata(pdev, priv); /* Register sysfs hooks */ ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_base); if (ret) return ret; if (id->driver_data & MC13783_ADC_16CHANS) { ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_16chans); if (ret) goto out_err_create_16chans; } if (!mc13783_adc_use_touchscreen(pdev)) { ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_ts); if (ret) goto out_err_create_ts; } priv->hwmon_dev = hwmon_device_register(&pdev->dev); if (IS_ERR(priv->hwmon_dev)) { ret = PTR_ERR(priv->hwmon_dev); dev_err(&pdev->dev, "hwmon_device_register failed with %d.\n", ret); goto out_err_register; } return 0; out_err_register: if (!mc13783_adc_use_touchscreen(pdev)) sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_ts); out_err_create_ts: if (id->driver_data & MC13783_ADC_16CHANS) sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_16chans); out_err_create_16chans: sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_base); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Luotao Fu19159.13%120.00%
Uwe Kleine-König12338.08%360.00%
Guenter Roeck92.79%120.00%
Total323100.00%5100.00%


static int mc13783_adc_remove(struct platform_device *pdev) { struct mc13783_adc_priv *priv = platform_get_drvdata(pdev); kernel_ulong_t driver_data = platform_get_device_id(pdev)->driver_data; hwmon_device_unregister(priv->hwmon_dev); if (!mc13783_adc_use_touchscreen(pdev)) sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_ts); if (driver_data & MC13783_ADC_16CHANS) sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_16chans); sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_base); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Luotao Fu6063.83%133.33%
Uwe Kleine-König3436.17%266.67%
Total94100.00%3100.00%

static const struct platform_device_id mc13783_adc_idtable[] = { { .name = "mc13783-adc", .driver_data = MC13783_ADC_16CHANS, }, { .name = "mc13892-adc", .driver_data = MC13783_ADC_BPDIV2, }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, mc13783_adc_idtable); static struct platform_driver mc13783_adc_driver = { .remove = mc13783_adc_remove, .driver = { .name = DRIVER_NAME, }, .id_table = mc13783_adc_idtable, }; module_platform_driver_probe(mc13783_adc_driver, mc13783_adc_probe); MODULE_DESCRIPTION("MC13783 ADC driver"); MODULE_AUTHOR("Luotao Fu <l.fu@pengutronix.de>"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Luotao Fu90471.01%110.00%
Uwe Kleine-König34927.42%330.00%
Guenter Roeck100.79%220.00%
Michael Thalmeier40.31%110.00%
Tejun Heo30.24%110.00%
Julia Lawall20.16%110.00%
Jingoo Han10.08%110.00%
Total1273100.00%10100.00%
Directory: drivers/hwmon
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.