diff options
| -rw-r--r-- | Documentation/hwmon/w83781d | 5 | ||||
| -rw-r--r-- | drivers/hwmon/w83781d.c | 22 |
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)) { |