[PATCH linux dev-4.10] Add fan card PCA9552 to Witherspoon devicetree

Brandon Wyman bjwyman at gmail.com
Thu Jun 29 04:03:54 AEST 2017


On Tue, Jun 27, 2017 at 4:33 AM, Joel Stanley <joel at jms.id.au> wrote:
> On Tue, Jun 27, 2017 at 3:43 PM, C├ędric Le Goater <clg at kaod.org> wrote:
>> On 06/26/2017 08:16 AM, Joel Stanley wrote:
>>> Hello Brandon,
>>>
>>> On Sat, Jun 24, 2017 at 9:26 AM, Brandon Wyman <bjwyman at gmail.com> wrote:
>>>> The Witherspoon OpenBMC system has a PCA9552 chip on the fan card that
>>>> is used for fan fault and identify LED control. Adding this chip and the
>>>> LED lines to the device tree.
>>>
>>> Great first submission. One issue I found, please see below.
>>
>> Joel,
>>
>> haven't you merged the patch defining all the PCA9552 pins as GPIOS ?
>>
>> https://github.com/openbmc/linux/commit/db30464ee579176abc82d0fe95aa9b9ff76d0c3a
>
> Yeah. We have a few PCA955x devices in the system.
>
> There's the pca9552 used as GPIOs for the GPUs that you worked on the
> driver for. There's also a pca9551 that's used for driving LEDs, which
> is what Brandon is working on.
>
> Cheers,
>
> Joel
That is correct. There are two such PCA9552 devices on the Witherspoon
system. One is on I2C-11, the other is on I2C-3.


More information about the openbmc mailing list