From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: Chunfeng Yun <chunfeng.yun@mediatek.com>,
Chun-Kuang Hu <chunkuang.hu@kernel.org>,
Vinod Koul <vkoul@kernel.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>,
Kishon Vijay Abraham I <kishon@ti.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
dri-devel@lists.freedesktop.org,
linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org,
Jitao Shi <jitao.shi@mediatek.com>,
Stanley Chu <stanley.chu@mediatek.com>
Subject: Re: [PATCH 01/18] phy: mediatek: add a new helper to update bitfield
Date: Thu, 22 Sep 2022 09:17:36 +0200 [thread overview]
Message-ID: <3d8fdcf5-c2cb-be63-48d5-d84d50aeace3@collabora.com> (raw)
In-Reply-To: <a3f98aa1d3d10b76b1fb5e6c2e3d64cedd0bf127.camel@mediatek.com>
Il 22/09/22 04:36, Chunfeng Yun ha scritto:
> On Wed, 2022-09-21 at 10:15 +0200, AngeloGioacchino Del Regno wrote:
>> Il 20/09/22 11:00, Chunfeng Yun ha scritto:
>>> Due to FIELD_PREP() macro can be used to prepare a bitfield value,
>>> local ones can be remove; add the new helper to make bitfield
>>> update
>>> easier.
>>>
>>> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
>>> ---
>>> drivers/phy/mediatek/phy-mtk-io.h | 7 +++++++
>>> 1 file changed, 7 insertions(+)
>>>
>>> diff --git a/drivers/phy/mediatek/phy-mtk-io.h
>>> b/drivers/phy/mediatek/phy-mtk-io.h
>>> index 500fcdab165d..a723d4afc9b4 100644
>>> --- a/drivers/phy/mediatek/phy-mtk-io.h
>>> +++ b/drivers/phy/mediatek/phy-mtk-io.h
>>> @@ -8,6 +8,7 @@
>>> #ifndef __PHY_MTK_H__
>>> #define __PHY_MTK_H__
>>>
>>> +#include <linux/bitfield.h>
>>> #include <linux/io.h>
>>>
>>> static inline void mtk_phy_clear_bits(void __iomem *reg, u32
>>> bits)
>>> @@ -35,4 +36,10 @@ static inline void mtk_phy_update_bits(void
>>> __iomem *reg, u32 mask, u32 val)
>>> writel(tmp, reg);
>>> }
>>>
>>> +/* field @mask should be constant and continuous */
>>
>> "Field @mask shall be [...]"
>> ^^^^^
> Ok, will modify it
>
>>
>>> +static inline void mtk_phy_update_field(void __iomem *reg, u32
>>> mask, u32 val)
>>
>> ...so, (void __iomem *reg, const u32 mask, u32 val)
> Maybe no need const, @mask will be checked it in compile time when
> use FIELD_PREP(), means @mask is a constant value, but not a variable.
>
Adding const is not *required*, but `mask` is, effectively, a constant, hence
it fully makes sense to add const.
> Thanks
>
>>
>>> +{
>>> + mtk_phy_update_bits(reg, mask, FIELD_PREP(mask, val));
>>> +}
>>> +
>>> #endif
>>
>>
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-09-22 7:18 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-20 9:00 [PATCH 00/18] unify register access and macros Chunfeng Yun
2022-09-20 9:00 ` [PATCH 01/18] phy: mediatek: add a new helper to update bitfield Chunfeng Yun
2022-09-21 8:15 ` AngeloGioacchino Del Regno
2022-09-22 2:36 ` Chunfeng Yun
2022-09-22 7:17 ` AngeloGioacchino Del Regno [this message]
2022-09-23 6:03 ` Chunfeng Yun
2022-09-20 9:00 ` [PATCH 02/18] phy: mediatek: tphy: remove macros to prepare bitfield value Chunfeng Yun
2022-09-20 9:00 ` [PATCH 03/18] phy: mediatek: xsphy: remove macros used " Chunfeng Yun
2022-09-20 9:00 ` [PATCH 04/18] phy: mediatek: ufs: use common register access helpers Chunfeng Yun
2022-09-21 8:13 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 05/18] phy: mediatek: pcie: use new helper to update register bits Chunfeng Yun
2022-09-21 8:13 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 06/18] phy: mediatek: hdmi: mt2701: use GENMASK and BIT to generate mask and bits Chunfeng Yun
2022-09-21 8:13 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 07/18] phy: mediatek: hdmi: mt2701: use FIELD_PREP to prepare bits field Chunfeng Yun
2022-09-21 8:13 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 08/18] phy: mediatek: hdmi: mt2701: use common helper to access registers Chunfeng Yun
2022-09-21 8:13 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 09/18] phy: mediatek: hdmi: mt8173: use GENMASK to generate bits mask Chunfeng Yun
2022-09-21 8:13 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 10/18] phy: mediatek: hdmi: mt8173: use FIELD_PREP to prepare bits field Chunfeng Yun
2022-09-21 8:13 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 11/18] phy: mediatek: hdmi: mt8173: use common helper to access registers Chunfeng Yun
2022-09-21 8:14 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 12/18] phy: mediatek: hdmi: remove register access helpers Chunfeng Yun
2022-09-21 8:13 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 13/18] phy: mediatek: mipi: mt8173: use GENMASK to generate bits mask Chunfeng Yun
2022-09-21 8:13 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 14/18] phy: mediatek: mipi: mt8173: use FIELD_PREP to prepare bits field Chunfeng Yun
2022-09-21 8:14 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 15/18] phy: mediatek: mipi: mt8173: use common helper to access registers Chunfeng Yun
2022-09-21 8:14 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 16/18] phy: mediatek: mipi: mt8183: use GENMASK to generate bits mask Chunfeng Yun
2022-09-21 8:14 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 17/18] phy: mediatek: mipi: mt8183: use common helper to access registers Chunfeng Yun
2022-09-21 8:14 ` AngeloGioacchino Del Regno
2022-09-20 9:00 ` [PATCH 18/18] phy: mediatek: mipi: remove register access helpers Chunfeng Yun
2022-09-21 8:15 ` AngeloGioacchino Del Regno
2022-09-24 6:28 ` [PATCH 00/18] unify register access and macros Vinod Koul
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=3d8fdcf5-c2cb-be63-48d5-d84d50aeace3@collabora.com \
--to=angelogioacchino.delregno@collabora.com \
--cc=chunfeng.yun@mediatek.com \
--cc=chunkuang.hu@kernel.org \
--cc=dri-devel@lists.freedesktop.org \
--cc=jitao.shi@mediatek.com \
--cc=kishon@ti.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=linux-phy@lists.infradead.org \
--cc=matthias.bgg@gmail.com \
--cc=p.zabel@pengutronix.de \
--cc=stanley.chu@mediatek.com \
--cc=vkoul@kernel.org \
/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).