linux-kernel - Re: [PATCH 1/3] clk: qcom: gcc-ipq5018: fix 'enable_reg' offset of 'gcc_gmac0_sys

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Message-ID: <01a93bfd-c1a0-4b1f-b941-6c0d3de316f9@gmail.com>
Date: Mon, 26 Feb 2024 17:54:22 +0100
From: Gabor Juhos <j4g8y7@...il.com>
To: Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>,
 Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Gokul Sriram Palanisamy <quic_gokulsri@...cinc.com>,
 Varadarajan Narayanan <quic_varada@...cinc.com>,
 Sricharan Ramabadhran <quic_srichara@...cinc.com>
Cc: linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] clk: qcom: gcc-ipq5018: fix 'enable_reg' offset of
 'gcc_gmac0_sys_clk'

2024. 02. 26. 10:53 keltezéssel, Kathiravan Thirumoorthy írta:
> 
> 
> On 2/25/2024 11:02 PM, Gabor Juhos wrote:
>> The value of the 'enable_reg' field in the 'gcc_gmac0_sys_clk'
>> clock definition seems wrong as it is greater than the
>> 'max_register' value defined in the regmap configuration.
>> Additionally, all other gmac specific branch clock definitions
>> within the driver uses the same value both for the 'enable_reg'
>> and for the 'halt_reg' fields.
>>
>> Due to the lack of documentation the correct value is not known.
>> Looking into the downstream driver does not help either, as that
>> uses the same (presumably wrong) value [1].
>>
>> Nevertheless, change the 'enable_reg' field of 'gcc_gmac0_sys_clk'
>> to use the value from the 'halt_reg' field so it follows the pattern
>> used in other gmac clock definitions. The change is based on the
>> assumption that the register layout of this clock is the same
>> as the other gmac clocks.
>>
>> 1.
>> https://git.codelinaro.org/clo/qsdk/oss/kernel/linux-ipq-5.4/-/blob/NHSS.QSDK.12.4.r4/drivers/clk/qcom/gcc-ipq5018.c?ref_type=heads#L1889
> 
> 
> Reviewed-by: Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>

Thank you for the review!

Regards,
Gabor