Re: [lm-sensors] i2c multimaster and the device driver detect function

2013-05-13 Thread Jean Delvare
Salut Jean-François, hi Guenter, Sorry for jumping in a little late, I am just back from vacation. On Thu, 9 May 2013 08:38:28 -0400, Jean-François Dagenais wrote: On 2013-05-08, at 11:53 PM, Guenter Roeck wrote: Is one of the I2C adapter drivers your own ? If so, you can disable

Re: [lm-sensors] i2c multimaster and the device driver detect function

2013-05-13 Thread Jean-François Dagenais
Salut Jean, merci de participer! On 2013-05-13, at 4:11 AM, Jean Delvare wrote: Guenter is right. You never have to disable auto-detection in the slave drivers (jc42 etc.) All these slave drivers do is claim I _can_ do auto-detection, not I _will_ do auto-detection. It's always up to the

Re: [lm-sensors] i2c multimaster and the device driver detect function

2013-05-13 Thread Jean Delvare
On Mon, 13 May 2013 09:54:47 -0400, Jean-François Dagenais wrote: Salut Jean, merci de participer! On 2013-05-13, at 4:11 AM, Jean Delvare wrote: Guenter is right. You never have to disable auto-detection in the slave drivers (jc42 etc.) All these slave drivers do is claim I _can_ do

Re: [lm-sensors] i2c multimaster and the device driver detect function

2013-05-13 Thread Guenter Roeck
On Mon, May 13, 2013 at 04:14:13PM +0200, Jean Delvare wrote: On Mon, 13 May 2013 09:54:47 -0400, Jean-François Dagenais wrote: Salut Jean, merci de participer! On 2013-05-13, at 4:11 AM, Jean Delvare wrote: Guenter is right. You never have to disable auto-detection in the slave

Re: [lm-sensors] i2c multimaster and the device driver detect function

2013-05-09 Thread Jean-François Dagenais
On 2013-05-08, at 11:53 PM, Guenter Roeck wrote: Guess the real conclusion is that one should avoid two active masters in the first place if possible. I agree, I can't think of any benefits worth the trouble. Is one of the I2C adapter drivers your own ? If so, you can disable

Re: [lm-sensors] i2c multimaster and the device driver detect function

2013-05-09 Thread Guenter Roeck
On Thu, May 09, 2013 at 08:38:28AM -0400, Jean-François Dagenais wrote: On 2013-05-08, at 11:53 PM, Guenter Roeck wrote: Guess the real conclusion is that one should avoid two active masters in the first place if possible. I agree, I can't think of any benefits worth the trouble.

Re: [lm-sensors] i2c multimaster and the device driver detect function

2013-05-08 Thread Guenter Roeck
On Wed, May 08, 2013 at 11:57:59AM -0400, Jean-François Dagenais wrote: Hi all, I've read the discussion on multimaster and I have to agree with Uwe about masters doing the arbitration (and retry). However, there's another issue which one quickly discovers when adding a second master on a

Re: [lm-sensors] i2c multimaster and the device driver detect function

2013-05-08 Thread Jean-François Dagenais
On 2013-05-08, at 13:54, Guenter Roeck wrote: [...] Isn't it the point of having multiple masters on the same bus, that each of them can manage the same devices ? I wouldn't think so. You mention why in your last paragraph and I totally see and agree with that. So that is not my intention at

Re: [lm-sensors] i2c multimaster and the device driver detect function

2013-05-08 Thread Guenter Roeck
On Wed, May 08, 2013 at 09:50:44PM -0400, Jean-François Dagenais wrote: On 2013-05-08, at 13:54, Guenter Roeck wrote: [...] Isn't it the point of having multiple masters on the same bus, that each of them can manage the same devices ? I wouldn't think so. You mention why in your last