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path: root/drivers/hwmon/mc13783-adc.c
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Diffstat (limited to 'drivers/hwmon/mc13783-adc.c')
-rw-r--r--drivers/hwmon/mc13783-adc.c101
1 files changed, 77 insertions, 24 deletions
diff --git a/drivers/hwmon/mc13783-adc.c b/drivers/hwmon/mc13783-adc.c
index 04d13b31aacd..6c6b240a782e 100644
--- a/drivers/hwmon/mc13783-adc.c
+++ b/drivers/hwmon/mc13783-adc.c
@@ -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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 19:53:42 +0000