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Message-ID: <30f4276b-5e29-4a7a-9b4c-6bab505984ab@intel.com>
Date:   Mon, 25 Sep 2023 13:31:56 +0300
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Subject: Re: [PATCH 2/6] mmc: sdhci: add __sdhci_execute_tuning() to header
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To:     Xi Ruoyao <xry111@xry111.site>,
        Drew Fustini <dfustini@baylibre.com>,
        Ulf Hansson <ulf.hansson@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Jisheng Zhang <jszhang@kernel.org>,
        Guo Ren <guoren@kernel.org>, Fu Wei <wefu@redhat.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Conor Dooley <conor@kernel.org>
Cc:     Robert Nelson <robertcnelson@beagleboard.org>,
        Jason Kridner <jkridner@beagleboard.org>,
        Han Gao <gaohan@iscas.ac.cn>, Icenowy Zheng <uwu@icenowy.me>,
        linux-mmc@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org
References: <20230921-th1520-mmc-v1-0-49f76c274fb3@baylibre.com>
 <20230921-th1520-mmc-v1-2-49f76c274fb3@baylibre.com>
 <4ef60ffd-3661-4bca-91a3-b49d6189c71b@intel.com>
 <aeb2cc43ea4e5281195c8bccd1f033ed73e6a7ef.camel@xry111.site>
From:   Adrian Hunter <adrian.hunter@intel.com>
Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki,
 Business Identity Code: 0357606 - 4, Domiciled in Helsinki
In-Reply-To: <aeb2cc43ea4e5281195c8bccd1f033ed73e6a7ef.camel@xry111.site>
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Precedence: bulk

On 25/09/23 13:23, Xi Ruoyao wrote:
> On Mon, 2023-09-25 at 13:21 +0300, Adrian Hunter wrote:
>> On 22/09/23 04:49, Drew Fustini wrote:
>>> Expose __sdhci_execute_tuning() so that it can be called from the
>>> mmc host controller drivers.
>>>
>>> In the sdhci-of-dwcmshc driver, sdhci_dwcmshc_th1520_ops sets
>>> platform_execute_tuning to th1520_execute_tuning(). That function has
>>> to manipulate phy registers before tuning can be performed. To avoid
>>> copying the code verbatim from __sdhci_execute_tuning() into
>>> th1520_execute_tuning(), make it possible for __sdhci_execute_tuning()
>>> to be called from sdhci-of-dwcmshc.
>>>
>>> Signed-off-by: Drew Fustini <dfustini@baylibre.com>
>>> ---
>>>  drivers/mmc/host/sdhci.c | 2 +-
>>>  drivers/mmc/host/sdhci.h | 1 +
>>>  2 files changed, 2 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
>>> index ff41aa56564e..fd607058d176 100644
>>> --- a/drivers/mmc/host/sdhci.c
>>> +++ b/drivers/mmc/host/sdhci.c
>>> @@ -2841,7 +2841,7 @@ void sdhci_send_tuning(struct sdhci_host *host, u32 opcode)
>>>  }
>>>  EXPORT_SYMBOL_GPL(sdhci_send_tuning);
>>>  
>>> -static int __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode)
>>> +int __sdhci_execute_tuning(struct sdhci_host *host, u32 opcode)
>>
>> Also need
>> 	EXPORT_SYMBOL_GPL(__sdhci_execute_tuning);
>>
>>>  {
>>>  	int i;
> 
> By the way should we rename this function?  I think
> "__sdhci_execute_tuning" vs "sdhci_execute_tuning" might be confusing
> when we export both.
> 

'name()' and '__name()' is not a particularly rare paradigm in the kernel,
so it seems ok.