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hwmon: (lm85) Support different PWM frequency tables

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The Analog Devices and SMSC devices supported by the lm85 driver do
not have the same PWM frequency table as the National Semiconductor
devices. Add support for per-device frequency tables.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Herbert Poetzl <herbert@13thfloor.at>
This commit is contained in:
Jean Delvare 2008-10-17 17:51:14 +02:00 committed by Jean Delvare
parent 86010c982d
commit 8a0795d9b8
1 changed files with 23 additions and 6 deletions
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29
drivers/hwmon/lm85.c
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@ -5,6 +5,7 @@
Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com>
Copyright (c) 2003 Margit Schubert-While <margitsw@t-online.de>
Copyright (c) 2004 Justin Thiessen <jthiessen@penguincomputing.com>
Copyright (C) 2007, 2008 Jean Delvare <khali@linux-fr.org>
Chip details at <http://www.national.com/ds/LM/LM85.pdf>
@ -192,20 +193,27 @@ static int RANGE_TO_REG(int range)
/* These are the PWM frequency encodings */
static const int lm85_freq_map[8] = { /* 1 Hz */
10, 15, 23, 30, 38, 47, 62, 94
10, 15, 23, 30, 38, 47, 61, 94
};
static const int adm1027_freq_map[8] = { /* 1 Hz */
11, 15, 22, 29, 35, 44, 59, 88
};
static int FREQ_TO_REG(int freq)
static int FREQ_TO_REG(const int *map, int freq)
{
int i;
/* Find the closest match */
for (i = 0; i < 7; ++i)
if (freq <= (lm85_freq_map[i] + lm85_freq_map[i + 1]) / 2)
if (freq <= (map[i] + map[i + 1]) / 2)
break;
return i;
}
#define FREQ_FROM_REG(val) lm85_freq_map[(val) & 0x07]
static int FREQ_FROM_REG(const int *map, u8 reg)
{
return map[reg & 0x07];
}
/* Since we can't use strings, I'm abusing these numbers
* to stand in for the following meanings:
@ -283,6 +291,7 @@ struct lm85_autofan {
struct lm85_data {
struct i2c_client client;
struct device *hwmon_dev;
const int *freq_map;
enum chips type;
struct mutex update_lock;
@ -532,7 +541,8 @@ static ssize_t show_pwm_freq(struct device *dev,
{
int nr = to_sensor_dev_attr(attr)->index;
struct lm85_data *data = lm85_update_device(dev);
return sprintf(buf, "%d\n", FREQ_FROM_REG(data->pwm_freq[nr]));
return sprintf(buf, "%d\n", FREQ_FROM_REG(data->freq_map,
data->pwm_freq[nr]));
}
static ssize_t set_pwm_freq(struct device *dev,
@ -544,7 +554,7 @@ static ssize_t set_pwm_freq(struct device *dev,
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->pwm_freq[nr] = FREQ_TO_REG(val);
data->pwm_freq[nr] = FREQ_TO_REG(data->freq_map, val);
lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
(data->zone[nr].range << 4)
| data->pwm_freq[nr]);
@ -1184,24 +1194,31 @@ static int lm85_detect(struct i2c_adapter *adapter, int address,
switch (kind) {
case lm85b:
type_name = "lm85b";
data->freq_map = lm85_freq_map;
break;
case lm85c:
type_name = "lm85c";
data->freq_map = lm85_freq_map;
break;
case adm1027:
type_name = "adm1027";
data->freq_map = adm1027_freq_map;
break;
case adt7463:
type_name = "adt7463";
data->freq_map = adm1027_freq_map;
break;
case emc6d100:
type_name = "emc6d100";
data->freq_map = adm1027_freq_map;
break;
case emc6d102:
type_name = "emc6d102";
data->freq_map = adm1027_freq_map;
break;
default:
type_name = "lm85";
data->freq_map = lm85_freq_map;
}
strlcpy(client->name, type_name, I2C_NAME_SIZE);