[PATCH qemu 2/3] ast2400: add a rtc device on I2C bus 0

[Cédric Le Goater]

On 05/18/2016 03:33 PM, Joel Stanley wrote:
> Hey Cedric,
> 
> On Wed, May 18, 2016 at 4:55 AM, Cédric Le Goater <clg at kaod.org> wrote:
>> The palmetto platform has a ds3231 RTC device but not qemu. Let's use
>> a ds1338 instead.
>>
>> The aspeed-bmc-opp-palmetto dts file needs to be changed consequently
>> with :
>>
>>         rtc at 68 {
>>                 compatible = "dallas,ds1338";
>>                 reg = <0x68>;
>>         };
> 
> Please see my comments for the tmp device.
> 
> How much does the register layout differ between the 1338 and the 3231?

Will tell you soon.

But on my palmetto running OpenBMC, I see : 

	[    5.630000] rtc-ds1307: probe of 0-0068 failed with error -5

So do we really have a RTC available on this bus ? 

	root at palmetto:~# i2cdetect -y 0
	     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
	00:          -- -- -- -- -- -- -- -- -- -- -- -- -- 
	10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
	20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
	30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
	40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
	50: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
	60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
	70: -- -- -- -- -- -- -- --                         

There are plenty of other devices on the other busses though, but 
none with Ox68.

There is also a RTC directly connected to APB bus. I guess we need a 
model for this one also. 

Cheers, 

C.