From 2a2d27da00250c9f117e35653ed5a6a3212e5d77 Mon Sep 17 00:00:00 2001
From: Jean Delvare <khali@linux-fr.org>
Date: Mon, 15 Nov 2010 21:38:56 +0100
Subject: [PATCH] hwmon: (w83795) Print the actual temperature channels as
sources
Don't expose raw register values to user-space. Decode and encode
temperature channels selected as temperature sources as needed.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
---
drivers/hwmon/w83795.c | 30 ++++++++++++++++++++----------
1 file changed, 20 insertions(+), 10 deletions(-)
diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c
index c941d3eb249e..400558d97f3d 100644
--- a/drivers/hwmon/w83795.c
+++ b/drivers/hwmon/w83795.c
@@ -966,17 +966,18 @@ show_temp_src(struct device *dev, struct device_attribute *attr, char *buf)
to_sensor_dev_attr_2(attr);
struct w83795_data *data = w83795_update_pwm_config(dev);
int index = sensor_attr->index;
- u8 val = index / 2;
- u8 tmp = data->temp_src[val];
+ u8 tmp = data->temp_src[index / 2];
if (index & 1)
- val = 4;
+ tmp >>= 4; /* Pick high nibble */
else
- val = 0;
- tmp >>= val;
- tmp &= 0x0f;
+ tmp &= 0x0f; /* Pick low nibble */
- return sprintf(buf, "%u\n", tmp);
+ /* Look-up the actual temperature channel number */
+ if (tmp >= 4 || tss_map[tmp][index] == TSS_MAP_RESERVED)
+ return -EINVAL; /* Shouldn't happen */
+
+ return sprintf(buf, "%u\n", (unsigned int)tss_map[tmp][index] + 1);
}
static ssize_t
@@ -988,12 +989,21 @@ store_temp_src(struct device *dev, struct device_attribute *attr,
struct sensor_device_attribute_2 *sensor_attr =
to_sensor_dev_attr_2(attr);
int index = sensor_attr->index;
- unsigned long tmp;
+ int tmp;
+ unsigned long channel;
u8 val = index / 2;
- if (strict_strtoul(buf, 10, &tmp) < 0)
+ if (strict_strtoul(buf, 10, &channel) < 0 ||
+ channel < 1 || channel > 14)
+ return -EINVAL;
+
+ /* Check if request can be fulfilled */
+ for (tmp = 0; tmp < 4; tmp++) {
+ if (tss_map[tmp][index] == channel - 1)
+ break;
+ }
+ if (tmp == 4) /* No match */
return -EINVAL;
- tmp = SENSORS_LIMIT(tmp, 0, 15);
mutex_lock(&data->update_lock);
if (index & 1) {
--
2.20.1