hwmon: do not init sensors on startup
The U-Boot Design Principles[1] clearly say:
Initialize devices only when they are needed within U-Boot, i.e. don't
initialize the Ethernet interface(s) unless U-Boot performs a download
over Ethernet; don't initialize any IDE or USB devices unless U-Boot
actually tries to load files from these, etc. (and don't forget to
shut down these devices after using them - otherwise nasty things may
happen when you try to boot your OS).
So, do not initialize and read the sensors on startup.
Signed-off-by: Heiko Schocher <hs@denx.de>
cc: Wolfgang Denk <wd@denx.de>
cc: Holger Brunck <holger.brunck@keymile.com>
diff --git a/drivers/hwmon/adm1021.c b/drivers/hwmon/adm1021.c
index d753e9a..d074cb7 100644
--- a/drivers/hwmon/adm1021.c
+++ b/drivers/hwmon/adm1021.c
@@ -109,8 +109,8 @@
return 0;
} /* dtt_write() */
-static int
-_dtt_init (int sensor)
+int
+dtt_init_one(int sensor)
{
dtt_cfg_t *dcp = &dttcfg[sensor >> 1];
int reg, val;
@@ -164,28 +164,7 @@
return 1;
return 0;
-} /* _dtt_init() */
-
-int
-dtt_init (void)
-{
- int i;
- unsigned char sensors[] = CONFIG_DTT_SENSORS;
- const char *const header = "DTT: ";
-
- /* switch to correct I2C bus */
- I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
-
- for (i = 0; i < sizeof(sensors); i++) {
- if (_dtt_init(sensors[i]) != 0)
- printf ("%s%d FAILED INIT\n", header, i+1);
- else
- printf ("%s%d is %i C\n", header, i+1,
- dtt_get_temp(sensors[i]));
- }
-
- return (0);
-} /* dtt_init() */
+} /* dtt_init_one() */
int
dtt_get_temp (int sensor)
diff --git a/drivers/hwmon/adt7460.c b/drivers/hwmon/adt7460.c
index caef70a..b7e36fe 100644
--- a/drivers/hwmon/adt7460.c
+++ b/drivers/hwmon/adt7460.c
@@ -50,7 +50,7 @@
return 0;
}
-int dtt_init(void)
+int dtt_init_one(int sensor)
{
printf("ADT7460 at I2C address 0x%2x\n", ADT7460_ADDRESS);
diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
index 5a2ea62..4e1db6d 100644
--- a/drivers/hwmon/ds1621.c
+++ b/drivers/hwmon/ds1621.c
@@ -126,7 +126,7 @@
}
-static int _dtt_init(int sensor)
+int dtt_init_one(int sensor)
{
int val;
@@ -155,23 +155,6 @@
return 0;
}
-
-int dtt_init (void)
-{
- int i;
- unsigned char sensors[] = CONFIG_DTT_SENSORS;
-
- for (i = 0; i < sizeof(sensors); i++) {
- if (_dtt_init(sensors[i]) != 0)
- printf("DTT%d: FAILED\n", i + 1);
- else
- printf("DTT%d: %i C\n", i + 1, dtt_get_temp(sensors[i]));
- }
-
- return (0);
-}
-
-
int dtt_get_temp(int sensor)
{
int i;
diff --git a/drivers/hwmon/ds1775.c b/drivers/hwmon/ds1775.c
index 80fb26f..feabdf2 100644
--- a/drivers/hwmon/ds1775.c
+++ b/drivers/hwmon/ds1775.c
@@ -98,7 +98,7 @@
}
-static int _dtt_init(int sensor)
+int dtt_init_one(int sensor)
{
int val;
@@ -133,23 +133,6 @@
return 0;
}
-
-int dtt_init (void)
-{
- int i;
- unsigned char sensors[] = CONFIG_DTT_SENSORS;
-
- for (i = 0; i < sizeof(sensors); i++) {
- if (_dtt_init(sensors[i]) != 0)
- printf("DTT%d: FAILED\n", i+1);
- else
- printf("DTT%d: %i C\n", i+1, dtt_get_temp(sensors[i]));
- }
-
- return (0);
-}
-
-
int dtt_get_temp(int sensor)
{
return (dtt_read(sensor, DTT_READ_TEMP) / 256);
diff --git a/drivers/hwmon/lm63.c b/drivers/hwmon/lm63.c
index 2f1f3cf..f3adf64 100644
--- a/drivers/hwmon/lm63.c
+++ b/drivers/hwmon/lm63.c
@@ -101,7 +101,7 @@
return sensor && (sensor != DTT_I2C_LM63_ADDR);
}
-static int _dtt_init(int sensor)
+int dtt_init_one(int sensor)
{
int i;
int val;
@@ -175,20 +175,3 @@
/* Ignore LSB for now, U-Boot only prints natural numbers */
return temp >> 8;
}
-
-int dtt_init(void)
-{
- int i;
- unsigned char sensors[] = CONFIG_DTT_SENSORS;
- const char *const header = "DTT: ";
-
- for (i = 0; i < sizeof(sensors); i++) {
- if (_dtt_init(sensors[i]) != 0)
- printf("%s%d FAILED INIT\n", header, i + 1);
- else
- printf("%s%d is %i C\n", header, i + 1,
- dtt_get_temp(sensors[i]));
- }
-
- return 0;
-}
diff --git a/drivers/hwmon/lm73.c b/drivers/hwmon/lm73.c
index 7b5d893..45cc6db 100644
--- a/drivers/hwmon/lm73.c
+++ b/drivers/hwmon/lm73.c
@@ -112,7 +112,7 @@
dlen);
} /* dtt_write() */
-static int _dtt_init(int const sensor)
+int dtt_init_one(int const sensor)
{
int val;
@@ -148,23 +148,7 @@
dtt_read(sensor, DTT_CONTROL); /* clear temperature flags */
return 0;
-} /* _dtt_init() */
-
-int dtt_init(void)
-{
- int i;
- unsigned char sensors[] = CONFIG_DTT_SENSORS;
- const char *const header = "DTT: ";
-
- for (i = 0; i < sizeof(sensors); i++) {
- if (0 != _dtt_init(sensors[i]))
- printf("%s%d FAILED INIT\n", header, i + 1);
- else
- printf("%s%d is %i C\n", header, i + 1,
- dtt_get_temp(sensors[i]));
- }
- return 0;
-} /* dtt_init() */
+} /* dtt_init_one() */
int dtt_get_temp(int const sensor)
{
diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 8119821..29c1a39 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -119,7 +119,7 @@
} /* dtt_write() */
-static int _dtt_init(int sensor)
+int dtt_init_one(int sensor)
{
int val;
@@ -145,32 +145,7 @@
return 1;
return 0;
-} /* _dtt_init() */
-
-
-int dtt_init (void)
-{
- int i;
- unsigned char sensors[] = CONFIG_DTT_SENSORS;
- const char *const header = "DTT: ";
- int old_bus;
-
- /* switch to correct I2C bus */
- old_bus = I2C_GET_BUS();
- I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
-
- for (i = 0; i < sizeof(sensors); i++) {
- if (_dtt_init(sensors[i]) != 0)
- printf("%s%d FAILED INIT\n", header, i+1);
- else
- printf("%s%d is %i C\n", header, i+1,
- dtt_get_temp(sensors[i]));
- }
- /* switch back to original I2C bus */
- I2C_SET_BUS(old_bus);
-
- return (0);
-} /* dtt_init() */
+} /* dtt_init_one() */
int dtt_get_temp(int sensor)
{
diff --git a/drivers/hwmon/lm81.c b/drivers/hwmon/lm81.c
index afe5b0d..f1572ba 100644
--- a/drivers/hwmon/lm81.c
+++ b/drivers/hwmon/lm81.c
@@ -89,7 +89,7 @@
#define DTT_CONFIG 0x40
#define DTT_ADR 0x48
-static int _dtt_init(int sensor)
+int dtt_init_one(int sensor)
{
int man;
int adr;
@@ -111,26 +111,9 @@
debug ("DTT: Found LM81@%x Rev: %d\n", adr, rev);
return 0;
-} /* _dtt_init() */
+} /* dtt_init_one() */
-int dtt_init (void)
-{
- int i;
- unsigned char sensors[] = CONFIG_DTT_SENSORS;
- const char *const header = "DTT: ";
-
- for (i = 0; i < sizeof(sensors); i++) {
- if (_dtt_init(sensors[i]) != 0)
- printf("%s%d FAILED INIT\n", header, i+1);
- else
- printf("%s%d is %i C\n", header, i+1,
- dtt_get_temp(sensors[i]));
- }
-
- return (0);
-} /* dtt_init() */
-
#define TEMP_FROM_REG(temp) \
((temp)<256?((((temp)&0x1fe) >> 1) * 10) + ((temp) & 1) * 5: \
((((temp)&0x1fe) >> 1) -255) * 10 - ((temp) & 1) * 5) \