mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-09-22 04:31:58 +08:00
hwmon: (mc13783-adc) Add support for the MC13892 PMIC
Based on a patch by David Jander that mostly did s/mc13783/mc13xxx/ . Additionally use dev_get_drvdata instead of to_platform_device + platform_get_drvdata in mc13783_adc_read (spotted by Jean Delvare). Cc: David Jander <david.jander@protonic.nl> Signed-off-by: Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Uwe Kleine-Koenig
Jean Delvare
parent
cb88200490
commit
0c2732152a
@ -3,8 +3,11 @@ Kernel driver mc13783-adc
|
||||
|
||||
Supported chips:
|
||||
* Freescale Atlas MC13783
|
||||
Prefix: 'mc13783_adc'
|
||||
Prefix: 'mc13783'
|
||||
Datasheet: http://www.freescale.com/files/rf_if/doc/data_sheet/MC13783.pdf?fsrch=1
|
||||
* Freescale Atlas MC13892
|
||||
Prefix: 'mc13892'
|
||||
Datasheet: http://cache.freescale.com/files/analog/doc/data_sheet/MC13892.pdf?fsrch=1&sr=1
|
||||
|
||||
Authors:
|
||||
Sascha Hauer <s.hauer@pengutronix.de>
|
||||
@ -13,20 +16,21 @@ Authors:
|
||||
Description
|
||||
-----------
|
||||
|
||||
The Freescale MC13783 is a Power Management and Audio Circuit. Among
|
||||
other things it contains a 10-bit A/D converter. The converter has 16
|
||||
channels which can be used in different modes.
|
||||
The A/D converter has a resolution of 2.25mV. Channels 0-4 have
|
||||
a dedicated meaning with chip internal scaling applied. Channels 5-7
|
||||
can be used as general purpose inputs or alternatively in a dedicated
|
||||
mode. Channels 12-15 are occupied by the touchscreen if it's active.
|
||||
The Freescale MC13783 and MC13892 are Power Management and Audio Circuits.
|
||||
Among other things they contain a 10-bit A/D converter. The converter has 16
|
||||
(MC13783) resp. 12 (MC13892) channels which can be used in different modes. The
|
||||
A/D converter has a resolution of 2.25mV.
|
||||
|
||||
Currently the driver only supports channels 2 and 5-15 with no alternative
|
||||
modes for channels 5-7.
|
||||
Some channels can be used as General Purpose inputs or in a dedicated mode with
|
||||
a chip internal scaling applied .
|
||||
|
||||
See this table for the meaning of the different channels and their chip
|
||||
internal scaling:
|
||||
Currently the driver only supports the Application Supply channel (BP / BPSNS),
|
||||
the General Purpose inputs and touchscreen.
|
||||
|
||||
See the following tables for the meaning of the different channels and their
|
||||
chip internal scaling:
|
||||
|
||||
MC13783:
|
||||
Channel Signal Input Range Scaling
|
||||
-------------------------------------------------------------------------------
|
||||
0 Battery Voltage (BATT) 2.50 - 4.65V -2.40V
|
||||
@ -34,7 +38,7 @@ Channel Signal Input Range Scaling
|
||||
2 Application Supply (BP) 2.50 - 4.65V -2.40V
|
||||
3 Charger Voltage (CHRGRAW) 0 - 10V / /5
|
||||
0 - 20V /10
|
||||
4 Charger Current (CHRGISNSP-CHRGISNSN) -0.25V - 0.25V x4
|
||||
4 Charger Current (CHRGISNSP-CHRGISNSN) -0.25 - 0.25V x4
|
||||
5 General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.30V No
|
||||
6 General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.30V / No /
|
||||
1.50 - 3.50V -1.20V
|
||||
@ -48,3 +52,23 @@ Channel Signal Input Range Scaling
|
||||
13 General Purpose TSX2 / Touchscreen X-plate 2 0 - 2.30V No
|
||||
14 General Purpose TSY1 / Touchscreen Y-plate 1 0 - 2.30V No
|
||||
15 General Purpose TSY2 / Touchscreen Y-plate 2 0 - 2.30V No
|
||||
|
||||
MC13892:
|
||||
Channel Signal Input Range Scaling
|
||||
-------------------------------------------------------------------------------
|
||||
0 Battery Voltage (BATT) 0 - 4.8V /2
|
||||
1 Battery Current (BATT - BATTISNSCC) -60 - 60 mV x20
|
||||
2 Application Supply (BPSNS) 0 - 4.8V /2
|
||||
3 Charger Voltage (CHRGRAW) 0 - 12V / /5
|
||||
0 - 20V /10
|
||||
4 Charger Current (CHRGISNS-BPSNS) / -0.3 - 0.3V / x4 /
|
||||
Touchscreen X-plate 1 0 - 2.4V No
|
||||
5 General Purpose ADIN5 / Battery Pack Thermistor 0 - 2.4V No
|
||||
6 General Purpose ADIN6 / Backup Voltage (LICELL) 0 - 2.4V / No
|
||||
Backup Voltage (LICELL) 0 - 3.6V x2/3
|
||||
7 General Purpose ADIN7 / UID / Die Temperature 0 - 2.4V / No /
|
||||
0 - 4.8V /2
|
||||
12 General Purpose TSX1 / Touchscreen X-plate 1 0 - 2.4V No
|
||||
13 General Purpose TSX2 / Touchscreen X-plate 2 0 - 2.4V No
|
||||
14 General Purpose TSY1 / Touchscreen Y-plate 1 0 - 2.4V No
|
||||
15 General Purpose TSY2 / Touchscreen Y-plate 2 0 - 2.4V No
|
||||
|
||||
@ -1360,10 +1360,10 @@ config SENSORS_APPLESMC
|
||||
the awesome power of applesmc.
|
||||
|
||||
config SENSORS_MC13783_ADC
|
||||
tristate "Freescale MC13783 ADC"
|
||||
depends on MFD_MC13783
|
||||
tristate "Freescale MC13783/MC13892 ADC"
|
||||
depends on MFD_MC13XXX
|
||||
help
|
||||
Support for the A/D converter on MC13783 PMIC.
|
||||
Support for the A/D converter on MC13783 and MC13892 PMIC.
|
||||
|
||||
if ACPI
|
||||
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
/*
|
||||
* Driver for the Freescale Semiconductor MC13783 adc.
|
||||
* 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
|
||||
@ -18,7 +18,7 @@
|
||||
* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include <linux/mfd/mc13783.h>
|
||||
#include <linux/mfd/mc13xxx.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/hwmon-sysfs.h>
|
||||
#include <linux/kernel.h>
|
||||
@ -28,24 +28,30 @@
|
||||
#include <linux/init.h>
|
||||
#include <linux/err.h>
|
||||
|
||||
#define MC13783_ADC_NAME "mc13783-adc"
|
||||
#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[10];
|
||||
};
|
||||
|
||||
static ssize_t mc13783_adc_show_name(struct device *dev, struct device_attribute
|
||||
*devattr, char *buf)
|
||||
{
|
||||
return sprintf(buf, "mc13783_adc\n");
|
||||
struct mc13783_adc_priv *priv = dev_get_drvdata(dev);
|
||||
|
||||
return sprintf(buf, "%s\n", priv->name);
|
||||
}
|
||||
|
||||
static int mc13783_adc_read(struct device *dev,
|
||||
struct device_attribute *devattr, unsigned int *val)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct mc13783_adc_priv *priv = platform_get_drvdata(pdev);
|
||||
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];
|
||||
@ -68,16 +74,21 @@ 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;
|
||||
|
||||
/*
|
||||
* 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;
|
||||
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);
|
||||
}
|
||||
@ -114,12 +125,21 @@ 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[] = {
|
||||
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,
|
||||
@ -127,8 +147,8 @@ static struct attribute *mc13783_attr[] = {
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group mc13783_group = {
|
||||
.attrs = mc13783_attr,
|
||||
static const struct attribute_group mc13783_group_16chans = {
|
||||
.attrs = mc13783_attr_16chans,
|
||||
};
|
||||
|
||||
/* last four channels may be occupied by the touchscreen */
|
||||
@ -156,24 +176,37 @@ 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 = kzalloc(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);
|
||||
ret = sysfs_create_group(&pdev->dev.kobj, &mc13783_group_base);
|
||||
if (ret)
|
||||
goto out_err_create1;
|
||||
goto out_err_create_base;
|
||||
|
||||
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_create2;
|
||||
goto out_err_create_ts;
|
||||
}
|
||||
|
||||
priv->hwmon_dev = hwmon_device_register(&pdev->dev);
|
||||
@ -184,17 +217,20 @@ static int __init mc13783_adc_probe(struct platform_device *pdev)
|
||||
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_create2:
|
||||
out_err_create_ts:
|
||||
|
||||
sysfs_remove_group(&pdev->dev.kobj, &mc13783_group);
|
||||
out_err_create1:
|
||||
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);
|
||||
out_err_create_base:
|
||||
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
kfree(priv);
|
||||
@ -205,13 +241,17 @@ out_err_create1:
|
||||
static int __devexit 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);
|
||||
|
||||
sysfs_remove_group(&pdev->dev.kobj, &mc13783_group);
|
||||
if (driver_data & MC13783_ADC_16CHANS)
|
||||
sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_16chans);
|
||||
|
||||
sysfs_remove_group(&pdev->dev.kobj, &mc13783_group_base);
|
||||
|
||||
platform_set_drvdata(pdev, NULL);
|
||||
kfree(priv);
|
||||
@ -219,12 +259,26 @@ static int __devexit mc13783_adc_remove(struct platform_device *pdev)
|
||||
return 0;
|
||||
}
|
||||
|
||||
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 = __devexit_p(mc13783_adc_remove),
|
||||
.driver = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = MC13783_ADC_NAME,
|
||||
.name = DRIVER_NAME,
|
||||
},
|
||||
.id_table = mc13783_adc_idtable,
|
||||
};
|
||||
|
||||
static int __init mc13783_adc_init(void)
|
||||
@ -243,4 +297,3 @@ module_exit(mc13783_adc_exit);
|
||||
MODULE_DESCRIPTION("MC13783 ADC driver");
|
||||
MODULE_AUTHOR("Luotao Fu <l.fu@pengutronix.de>");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_ALIAS("platform:" MC13783_ADC_NAME);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user