Messages in this thread | | | Date | Mon, 13 Jul 2015 12:39:53 +0530 | From | Vaibhav Hiremath <> | Subject | Re: [PATCH-v3 02/11] i2c: pxa: No need to set slave addr for i2c master mode reset |
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On Friday 10 July 2015 08:26 PM, Wolfram Sang wrote: > On Fri, Jul 10, 2015 at 07:55:31PM +0530, Vaibhav Hiremath wrote: >> >> >> On Friday 10 July 2015 07:44 PM, Wolfram Sang wrote: >>> On Fri, Jul 10, 2015 at 06:08:43PM +0530, Vaibhav Hiremath wrote: >>>> >>>> >>>> On Friday 10 July 2015 01:41 PM, Wolfram Sang wrote: >>>>> On Tue, Jul 07, 2015 at 12:54:46AM +0530, Vaibhav Hiremath wrote: >>>>>> Normally i2c controller works as master, so slave addr is not needed, or it >>>>>> will impact some slave device (eg. ST NFC chip) i2c accesses, because it has >>>>>> the same i2c address with controller. >>>>> >>>>> Just to make sure: Does it? As I read the code, slave interrupts are >>>>> enabled later only when slave mode is selected? Is that a HW bug? And if >>>>> so, can't the code just be moved into this #ifdef block later? >>>>> >>>> >>>> Yes we could, infact I thought about it; >>>> but I would break recommended sequence here. >>> >>> And did you set the "own slave address" to a value which one of your >>> existing i2c slaves also has (without enabling slave mode)? Did it >>> disturb communication? >>> >> >> Since slave and master mode are mutual exclusive, >> I did not try this. > > Ehrm, what I meant was. Did you see the issue mentioned in the above > commit message? Can you reproduce it? You don't need to enable slave > mode for that, no? >
Ohh yes,
I am able to reproduce this issue.
I have pxa1928 based board, where I have only PMIC 88PM860 connected to I2C bus, and whenever I set slave address to 0x30 (PMIC slave address) all I2C transaction for PMIC goes for toss.
Thanks, Vaibhav
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