linux-kernel - Re: [PATCH] mmc: sdhci_am654: Drop lookup for deprecated ti,otap-del-sel

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Message-ID: <f9d4946e-f5f1-4fb7-adab-eaf624ce838c@ti.com>
Date:   Wed, 22 Nov 2023 11:23:29 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
CC:     <linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH] mmc: sdhci_am654: Drop lookup for deprecated
 ti,otap-del-sel



On 20/11/23 17:38, Adrian Hunter wrote:
> On 10/11/23 09:25, Vignesh Raghavendra wrote:
>> ti,otap-del-sel has been deprecated since v5.7 and there are no users of
>> this property and no documentation in the DT bindings either.
>> Drop the fallback code looking for this property, this makes
>> sdhci_am654_get_otap_delay() much easier to read as all the TAP values
>> can be handled via a single iterator loop.
>>
>> Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
> 
> One minor comment below, otherwise:
> 
> Acked-by: Adrian Hunter <adrian.hunter@...el.com>
> 
>> ---
>>
>> Based on discussions at [1]
>> https://lore.kernel.org/linux-mmc/CAPDyKFrCSTW3G6H7qS89d+UQ6RJcAYcKSPULVT8J7XKsUDpHdw@mail.gmail.com/
>>
>> CC'ing DT maintainers to see if there any objection to remove
>> undocumented and deprecated property.
>>
>>  drivers/mmc/host/sdhci_am654.c | 25 ++++---------------------
>>  1 file changed, 4 insertions(+), 21 deletions(-)
>>
>> diff --git a/drivers/mmc/host/sdhci_am654.c b/drivers/mmc/host/sdhci_am654.c
>> index 967bd2dfcda1..402fba0fa418 100644
>> --- a/drivers/mmc/host/sdhci_am654.c
>> +++ b/drivers/mmc/host/sdhci_am654.c
>> @@ -577,32 +577,15 @@ static int sdhci_am654_get_otap_delay(struct sdhci_host *host,
>>  	int i;
>>  	int ret;
>>  
>> -	ret = device_property_read_u32(dev, td[MMC_TIMING_LEGACY].otap_binding,
>> -				 &sdhci_am654->otap_del_sel[MMC_TIMING_LEGACY]);
>> -	if (ret) {
>> -		/*
>> -		 * ti,otap-del-sel-legacy is mandatory, look for old binding
>> -		 * if not found.
>> -		 */
>> -		ret = device_property_read_u32(dev, "ti,otap-del-sel",
>> -					       &sdhci_am654->otap_del_sel[0]);
>> -		if (ret) {
>> -			dev_err(dev, "Couldn't find otap-del-sel\n");
>> -
>> -			return ret;
>> -		}
>> -
>> -		dev_info(dev, "Using legacy binding ti,otap-del-sel\n");
>> -		sdhci_am654->legacy_otapdly = true;
> 
> With this removal, legacy_otapdly is not used anymore and should be
> removed also.
> 

Indeed, will post v2 with cleanup. Thanks for the review!

>> -
>> -		return 0;
>> -	}
>> -
>>  	for (i = MMC_TIMING_LEGACY; i <= MMC_TIMING_MMC_HS400; i++) {
>>  
>>  		ret = device_property_read_u32(dev, td[i].otap_binding,
>>  					       &sdhci_am654->otap_del_sel[i]);
>>  		if (ret) {
>> +			if (i == MMC_TIMING_LEGACY) {
>> +				dev_err(dev, "Couldn't find mandatory ti,otap-del-sel-legacy\n");
>> +				return ret;
>> +			}
>>  			dev_dbg(dev, "Couldn't find %s\n",
>>  				td[i].otap_binding);
>>  			/*
> 

-- 
Regards
Vignesh