linux-kernel - RE: [PATCH v12] USB: serial: cp210x: Add support for GPIOs on CP2108

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Message-ID: <CO1PR11MB4882BE3951A2CDFC8F060B58812A9@CO1PR11MB4882.namprd11.prod.outlook.com>
Date:   Thu, 20 May 2021 15:11:54 +0000
From:   Tung Pham <Tung.Pham@...abs.com>
To:     Johan Hovold <johan@...nel.org>
CC:     Pho Tran <photranvan0712@...il.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Hung Nguyen <Hung.Nguyen@...abs.com>,
        Pho Tran <Pho.Tran@...abs.com>
Subject: RE: [PATCH v12] USB: serial: cp210x: Add support for GPIOs on CP2108



-----Original Message-----
From: Johan Hovold <johan@...nel.org> 
Sent: Tuesday, May 18, 2021 2:05 PM
To: Tung Pham <Tung.Pham@...abs.com>
Cc: Pho Tran <photranvan0712@...il.com>; gregkh@...uxfoundation.org; linux-usb@...r.kernel.org; linux-kernel@...r.kernel.org; Hung Nguyen <Hung.Nguyen@...abs.com>; Pho Tran <Pho.Tran@...abs.com>
Subject: Re: [PATCH v12] USB: serial: cp210x: Add support for GPIOs on CP2108

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On Tue, May 18, 2021 at 03:18:06AM +0000, Tung Pham wrote:
> Dear Johan Hovold.
> Do you agree and approve with this path?.

> I'm still waiting for you to confirm that you have tested the patch with different pin configurations in eeprom. The first few iterations > > clearly weren't tested and I don't want to waste more time reviewing it before it's tested as I believe I mentioned in my last mail.

> Johan

-> we have tested pass the GPIO of cp2108:
Case1: all 16 GPIO are configured as GPIO function.
Case2: all 16 GPIO are configured as alternative functions (not GPIO).
Please see attached file for more detail.
Thanks.
Tung Pham.

View attachment "test_case_1.txt" of type "text/plain" (6704 bytes)

View attachment "test_case_2.txt" of type "text/plain" (1775 bytes)

View attachment "scripts.txt" of type "text/plain" (3762 bytes)