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authorJean Delvare <khali@linux-fr.org>2006-02-05 23:26:51 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2006-03-23 14:21:53 -0800
commitfabddcd49d8b4fca40ce346f701853888d98b5d2 (patch)
treeee3722562be9d1106f3c311dd2e8a84abdcd5bc9
parent41fc49337d7779eefb6b5e85a8a3cd9e11e9de08 (diff)
[PATCH] w83781d: Don't reset the chip by default
Stop resetting the chip on load by default, so as to preserve the BIOS initializations. Same was done in the w83627hf driver some times ago for the same reasons. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--Documentation/hwmon/w83781d5
-rw-r--r--drivers/hwmon/w83781d.c22
2 files changed, 26 insertions, 1 deletions
diff --git a/Documentation/hwmon/w83781d b/Documentation/hwmon/w83781d
index ac155d8b0fef..b1e9f80098ee 100644
--- a/Documentation/hwmon/w83781d
+++ b/Documentation/hwmon/w83781d
@@ -36,6 +36,11 @@ Module parameters
Use 'init=0' to bypass initializing the chip.
Try this if your computer crashes when you load the module.
+* reset int
+ (default 0)
+ The driver used to reset the chip on load, but does no more. Use
+ 'reset=1' to restore the old behavior. Report if you need to do this.
+
force_subclients=bus,caddr,saddr,saddr
This is used to force the i2c addresses for subclients of
a certain chip. Typical usage is `force_subclients=0,0x2d,0x4a,0x4b'
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index 782117817526..8b17132f6b94 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -57,6 +57,10 @@ I2C_CLIENT_INSMOD_5(w83781d, w83782d, w83783s, w83627hf, as99127f);
I2C_CLIENT_MODULE_PARM(force_subclients, "List of subclient addresses: "
"{bus, clientaddr, subclientaddr1, subclientaddr2}");
+static int reset;
+module_param(reset, bool, 0);
+MODULE_PARM_DESC(reset, "Set to one to reset chip on load");
+
static int init = 1;
module_param(init, bool, 0);
MODULE_PARM_DESC(init, "Set to zero to bypass chip initialization");
@@ -1460,8 +1464,17 @@ w83781d_init_client(struct i2c_client *client)
int type = data->type;
u8 tmp;
- if (init && type != as99127f) { /* this resets registers we don't have
+ if (reset && type != as99127f) { /* this resets registers we don't have
documentation for on the as99127f */
+ /* Resetting the chip has been the default for a long time,
+ but it causes the BIOS initializations (fan clock dividers,
+ thermal sensor types...) to be lost, so it is now optional.
+ It might even go away if nobody reports it as being useful,
+ as I see very little reason why this would be needed at
+ all. */
+ dev_info(&client->dev, "If reset=1 solved a problem you were "
+ "having, please report!\n");
+
/* save these registers */
i = w83781d_read_value(client, W83781D_REG_BEEP_CONFIG);
p = w83781d_read_value(client, W83781D_REG_PWMCLK12);
@@ -1478,6 +1491,13 @@ w83781d_init_client(struct i2c_client *client)
w83781d_write_value(client, W83781D_REG_BEEP_INTS2, 0);
}
+ /* Disable power-on abnormal beep, as advised by the datasheet.
+ Already done if reset=1. */
+ if (init && !reset && type != as99127f) {
+ i = w83781d_read_value(client, W83781D_REG_BEEP_CONFIG);
+ w83781d_write_value(client, W83781D_REG_BEEP_CONFIG, i | 0x80);
+ }
+
data->vrm = vid_which_vrm();
if ((type != w83781d) && (type != as99127f)) {