From: Bagas Sanjaya <bagasdotme@gmail.com>
To: Raul Piper <raulpblooper@gmail.com>,
<kernelnewbies@kernelnewbies.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux I2C <linux-i2c@vger.kernel.org>,
Linux Devicetree <devicetree@vger.kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Andi Shyti <andi.shyti@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Subject: Re: Debugging i2c : i2cdetect cant detect a device on i2c line
Date: Thu, 7 Sep 2023 20:36:32 +0700 [thread overview]
Message-ID: <ZPnR4Cx6_Hh3weEl@debian.me> (raw)
In-Reply-To: <CAEwN+MCorDCS7EhN40Qgja_nY+SFc3G61Zd6yntqAS+w26YO9Q@mail.gmail.com>
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[also Cc: devicetree and ARM folks]
On Thu, Sep 07, 2023 at 08:21:44AM +0530, Raul Piper wrote:
> Hello ,
> I am trying to detect an i2c device A on i2c1 line on one of the Arm
> Cortex A7 platform but not able to see any device on a given address (
> 0x3d) .
>
> Is there any parameters of i2c which i can change like rise/fall time
> , timeout etc in a device tree or kernel source and re test it?
> I have tried changing the i2c speed from 100KHz to 400 KHz but no success.
> I have even tried removing the 1.5K pull ups on the i2c lines but no result.
>
> So I wanted to know on what factors i2cdetect may not probe the device
> or show it on the hex dump.
> What parameters of i2c driver i can tinker and where? Is Platform dts
> is the only file i can modify and test with?
> Kernel is 5.51 .
Do you mean v5.15.y stable series?
> There are other 2-3 devices on the same lines which responds to
> i2cdetect with correct address but not this device (0x3D) .
> Its i2c address is also different from the current devices.
>
Specifically, what device do you have this issue with?
Confused...
--
An old man doll... just what I always wanted! - Clara
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WARNING: multiple messages have this Message-ID (diff)
From: Bagas Sanjaya <bagasdotme@gmail.com>
To: Raul Piper <raulpblooper@gmail.com>,
<kernelnewbies@kernelnewbies.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux I2C <linux-i2c@vger.kernel.org>,
Linux Devicetree <devicetree@vger.kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>,
Andi Shyti <andi.shyti@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>
Subject: Re: Debugging i2c : i2cdetect cant detect a device on i2c line
Date: Thu, 7 Sep 2023 20:36:32 +0700 [thread overview]
Message-ID: <ZPnR4Cx6_Hh3weEl@debian.me> (raw)
In-Reply-To: <CAEwN+MCorDCS7EhN40Qgja_nY+SFc3G61Zd6yntqAS+w26YO9Q@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 1194 bytes --]
[also Cc: devicetree and ARM folks]
On Thu, Sep 07, 2023 at 08:21:44AM +0530, Raul Piper wrote:
> Hello ,
> I am trying to detect an i2c device A on i2c1 line on one of the Arm
> Cortex A7 platform but not able to see any device on a given address (
> 0x3d) .
>
> Is there any parameters of i2c which i can change like rise/fall time
> , timeout etc in a device tree or kernel source and re test it?
> I have tried changing the i2c speed from 100KHz to 400 KHz but no success.
> I have even tried removing the 1.5K pull ups on the i2c lines but no result.
>
> So I wanted to know on what factors i2cdetect may not probe the device
> or show it on the hex dump.
> What parameters of i2c driver i can tinker and where? Is Platform dts
> is the only file i can modify and test with?
> Kernel is 5.51 .
Do you mean v5.15.y stable series?
> There are other 2-3 devices on the same lines which responds to
> i2cdetect with correct address but not this device (0x3D) .
> Its i2c address is also different from the current devices.
>
Specifically, what device do you have this issue with?
Confused...
--
An old man doll... just what I always wanted! - Clara
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]
WARNING: multiple messages have this Message-ID (diff)
From: Bagas Sanjaya <bagasdotme@gmail.com>
To: Raul Piper <raulpblooper@gmail.com>,
<kernelnewbies@kernelnewbies.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
Linux I2C <linux-i2c@vger.kernel.org>,
Linux Devicetree <devicetree@vger.kernel.org>
Cc: Linus Walleij <linus.walleij@linaro.org>,
Andi Shyti <andi.shyti@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>
Subject: Re: Debugging i2c : i2cdetect cant detect a device on i2c line
Date: Thu, 7 Sep 2023 20:36:32 +0700 [thread overview]
Message-ID: <ZPnR4Cx6_Hh3weEl@debian.me> (raw)
In-Reply-To: <CAEwN+MCorDCS7EhN40Qgja_nY+SFc3G61Zd6yntqAS+w26YO9Q@mail.gmail.com>
[-- Attachment #1.1: Type: text/plain, Size: 1194 bytes --]
[also Cc: devicetree and ARM folks]
On Thu, Sep 07, 2023 at 08:21:44AM +0530, Raul Piper wrote:
> Hello ,
> I am trying to detect an i2c device A on i2c1 line on one of the Arm
> Cortex A7 platform but not able to see any device on a given address (
> 0x3d) .
>
> Is there any parameters of i2c which i can change like rise/fall time
> , timeout etc in a device tree or kernel source and re test it?
> I have tried changing the i2c speed from 100KHz to 400 KHz but no success.
> I have even tried removing the 1.5K pull ups on the i2c lines but no result.
>
> So I wanted to know on what factors i2cdetect may not probe the device
> or show it on the hex dump.
> What parameters of i2c driver i can tinker and where? Is Platform dts
> is the only file i can modify and test with?
> Kernel is 5.51 .
Do you mean v5.15.y stable series?
> There are other 2-3 devices on the same lines which responds to
> i2cdetect with correct address but not this device (0x3D) .
> Its i2c address is also different from the current devices.
>
Specifically, what device do you have this issue with?
Confused...
--
An old man doll... just what I always wanted! - Clara
[-- Attachment #1.2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]
[-- Attachment #2: Type: text/plain, Size: 176 bytes --]
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-09-16 2:30 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-07 2:51 Debugging i2c : i2cdetect cant detect a device on i2c line Raul Piper
2023-09-07 2:51 ` Raul Piper
2023-09-07 13:36 ` Bagas Sanjaya [this message]
2023-09-07 13:36 ` Bagas Sanjaya
2023-09-07 13:36 ` Bagas Sanjaya
2023-09-07 13:55 ` Russell King (Oracle)
2023-09-07 13:55 ` Russell King (Oracle)
2023-09-07 13:55 ` Russell King (Oracle)
2023-09-07 16:17 ` Lucas Tanure
2023-09-07 17:08 ` Raul Piper
2023-09-07 17:08 ` Raul Piper
2023-09-07 17:08 ` Raul Piper
2023-09-07 17:23 ` Lucas Tanure
2023-09-07 18:00 ` Russell King (Oracle)
2023-09-07 18:00 ` Russell King (Oracle)
2023-09-07 18:00 ` Russell King (Oracle)
2023-09-07 17:28 ` Russell King (Oracle)
2023-09-07 17:28 ` Russell King (Oracle)
2023-09-07 17:28 ` Russell King (Oracle)
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