linux-kernel - Re: [PATCH v1] mtd: rawnand: meson: remove unneeded bitwise OR with zeroes

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Date:   Thu, 8 Jun 2023 07:37:29 +0300
From:   Arseniy Krasnov <avkrasnov@...rdevices.ru>
To:     Liang Yang <liang.yang@...ogic.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
CC:     <oxffffaa@...il.com>, <kernel@...rdevices.ru>,
        <linux-mtd@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-amlogic@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1] mtd: rawnand: meson: remove unneeded bitwise OR with
 zeroes



On 08.06.2023 06:23, Liang Yang wrote:
> 
> 
> On 2023/6/8 5:18, Arseniy Krasnov wrote:
>> [ EXTERNAL EMAIL ]
>>
>> Hi again Miquel, Liang!
>>
>> What do You think about this patch?
>>
>> Thanks, Arseniy
>>
>> On 05.06.2023 22:15, Arseniy Krasnov wrote:
>>> Both operations have no effect.
>>>
>>> Signed-off-by: Arseniy Krasnov <AVKrasnov@...rdevices.ru>
>>> ---
>>>   drivers/mtd/nand/raw/meson_nand.c | 4 ++--
>>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/mtd/nand/raw/meson_nand.c b/drivers/mtd/nand/raw/meson_nand.c
>>> index 074e14225c06..50d3110ad321 100644
>>> --- a/drivers/mtd/nand/raw/meson_nand.c
>>> +++ b/drivers/mtd/nand/raw/meson_nand.c
>>> @@ -595,12 +595,12 @@ static int meson_nfc_rw_cmd_prepare_and_execute(struct nand_chip *nand,
>>>        cmd0 = in ? NAND_CMD_READ0 : NAND_CMD_SEQIN;
>>>        nfc->cmdfifo.rw.cmd0 = cs | NFC_CMD_CLE | cmd0;
>>>
>>> -     addrs[0] = cs | NFC_CMD_ALE | 0;
>>> +     addrs[0] = cs | NFC_CMD_ALE;
>>>        if (mtd->writesize <= 512) {
>>>                cmd_num--;
>>>                row_start = 1;
>>>        } else {
>>> -             addrs[1] = cs | NFC_CMD_ALE | 0;
>>> +             addrs[1] = cs | NFC_CMD_ALE;
>>>                row_start = 2;
>>>        }
> Hi Arseniy and Miquel,
> 
> The two zeros indcates two column address. maybe we could use the micro "COLUMN_ADDR_0" and "COLUMN_ADDR_1" to keep the nfc command format "CE | ALE | addr" consistency and also let function "meson_nfc_rw_cmd_prepare_and_execute" be more readable.

Liang, done in v2:)

Thanks, Arseniy

> 
> Thanks,
> Liang
> 
>>>