From: Liang Yang <liang.yang@amlogic.com>
To: Boris Brezillon <boris.brezillon@bootlin.com>
Cc: Jianxin Pan <jianxin.pan@amlogic.com>,
<linux-mtd@lists.infradead.org>, Rob Herring <robh@kernel.org>,
Hanjie Lin <hanjie.lin@amlogic.com>,
Victor Wan <victor.wan@amlogic.com>,
Neil Armstrong <narmstrong@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Richard Weinberger <richard@nod.at>,
Yixun Lan <yixun.lan@amlogic.com>, <linux-kernel@vger.kernel.org>,
Marek Vasut <marek.vasut@gmail.com>,
Jian Hu <jian.hu@amlogic.com>,
Kevin Hilman <khilman@baylibre.com>,
Carlo Caione <carlo@caione.org>,
<linux-amlogic@lists.infradead.org>,
Brian Norris <computersforpeace@gmail.com>,
David Woodhouse <dwmw2@infradead.org>,
<linux-arm-kernel@lists.infradead.org>,
Jerome Brunet <jbrunet@baylibre.com>
Subject: Re: [PATCH v5 2/2] mtd: rawnand: meson: add support for Amlogic NAND flash controller
Date: Fri, 19 Oct 2018 16:30:48 +0800 [thread overview]
Message-ID: <3e462d23-a100-6eb2-3740-abe2373a8e15@amlogic.com> (raw)
In-Reply-To: <20181019101033.0a160506@bbrezillon>
On 2018/10/19 16:10, Boris Brezillon wrote:
> On Fri, 19 Oct 2018 15:29:05 +0800
> Liang Yang <liang.yang@amlogic.com> wrote:
>
>>> How about defining that the HW returns an array of __le64 instead and then
>>> define the following macros which you can use after converting in the
>>> CPU endianness
>>>
>>> #define ECC_GET_PROTECTED_OOB_BYTE(x, y) (((x) >> (8 * (1 + y)) & GENMASK(7, 0))
>>> #define ECC_COMPLETE BIT(31)
>>> #define ECC_ERR_CNT(x) (((x) >> 24) & GENMASK(5, 0))
>>>
>>> (I'm not entirely sure the field positions are correct, but I'll let you
>>> check that).
>>>
>> ok. i think it should be:
>>
>> #define ECC_GET_PROTECTED_OOB_BYTE(x, y) (((x) >> (8 * y) &
>> GENMASK(7, 0))
>>
>> if x represents the u64 and y represents the index of the u64.
>
> Absolutely.
>
>>
>>
>>
>>>> +
>>>> +#define PER_INFO_BYTE (sizeof(struct meson_nfc_info_format))
>>>> +
>>>> +struct meson_nfc_nand_chip {
>>>> + struct list_head node;
>>>> + struct nand_chip nand;
>>>> + bool is_scramble;
>>>
>>> I think I already mentioned the NAND_NEED_SCRAMBLING flag []. Please
>>> drop this field and test (chip->flags & NAND_NEED_SCRAMBLING) instead.
>>>
>> em, i use NAND_NEED_SCRAMBLING and is_scramble is set:
>> static int meson_nand_attach_chip(struct nand_chip *nand)
>> {
>> ......
>> meson_chip->is_scramble =
>> (nand->options & NAND_NEED_SCRAMBLING) ? 1 : 0;
>> ......
>> }
>
> Why do you need to add a new field then? Just test
> nand->options & NAND_NEED_SCRAMBLING directly or provide a helper
> function that does that.
>
ok, i will fix it.
> .
>
next prev parent reply other threads:[~2018-10-19 8:30 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-18 5:09 [PATCH v5 0/2] mtd: rawnand: meson: add Amlogic NAND driver support Jianxin Pan
2018-10-18 5:09 ` [PATCH v5 1/2] dt-bindings: nand: meson: add Amlogic NAND controller driver Jianxin Pan
2018-10-18 16:48 ` Rob Herring
2018-10-18 5:09 ` [PATCH v5 2/2] mtd: rawnand: meson: add support for Amlogic NAND flash controller Jianxin Pan
2018-10-18 14:24 ` Boris Brezillon
2018-10-19 7:29 ` Liang Yang
2018-10-18 19:33 ` Boris Brezillon
2018-10-19 7:29 ` Liang Yang
2018-10-19 8:10 ` Boris Brezillon
2018-10-19 8:30 ` Liang Yang [this message]
2018-10-18 20:34 ` Boris Brezillon
2018-10-18 20:39 ` Boris Brezillon
2018-10-19 8:04 ` Liang Yang
2018-10-18 20:50 ` Boris Brezillon
2018-10-19 8:29 ` Liang Yang
2018-10-19 8:42 ` Boris Brezillon
2018-10-19 9:01 ` Liang Yang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=3e462d23-a100-6eb2-3740-abe2373a8e15@amlogic.com \
--to=liang.yang@amlogic.com \
--cc=boris.brezillon@bootlin.com \
--cc=carlo@caione.org \
--cc=computersforpeace@gmail.com \
--cc=dwmw2@infradead.org \
--cc=hanjie.lin@amlogic.com \
--cc=jbrunet@baylibre.com \
--cc=jian.hu@amlogic.com \
--cc=jianxin.pan@amlogic.com \
--cc=khilman@baylibre.com \
--cc=linux-amlogic@lists.infradead.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mtd@lists.infradead.org \
--cc=marek.vasut@gmail.com \
--cc=martin.blumenstingl@googlemail.com \
--cc=narmstrong@baylibre.com \
--cc=richard@nod.at \
--cc=robh@kernel.org \
--cc=victor.wan@amlogic.com \
--cc=yixun.lan@amlogic.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).