From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.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: Fri, 23 Sep 2022 14:03:35 +0800 [thread overview]
Message-ID: <50c77b7b4854037f927880dc8775392a7b2e59fc.camel@mediatek.com> (raw)
In-Reply-To: <3d8fdcf5-c2cb-be63-48d5-d84d50aeace3@collabora.com>
On Thu, 2022-09-22 at 09:17 +0200, AngeloGioacchino Del Regno wrote:
> 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.
Prefer to leave it unchanged, there is no 'const' in
function mtk_phy_update_bits(), if add 'const', will cause build
warning. and FIELD_PREP() already do many checks in compile time.
Thanks
>
> > Thanks
> >
> > >
> > > > +{
> > > > + mtk_phy_update_bits(reg, mask, FIELD_PREP(mask, val));
> > > > +}
> > > > +
> > > > #endif
> > >
> > >
>
>
>
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next prev parent reply other threads:[~2022-09-23 6:39 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
2022-09-23 6:03 ` Chunfeng Yun [this message]
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
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