From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: Chunfeng Yun <chunfeng.yun@mediatek.com>, Vinod Koul <vkoul@kernel.org>
Cc: Kishon Vijay Abraham I <kishon@ti.com>,
Rob Herring <robh+dt@kernel.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org,
linux-phy@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Eddie Hung <eddie.hung@mediatek.com>
Subject: Re: [PATCH v2 3/5] phy: mediatek: add helpers to update bits of registers
Date: Fri, 24 Dec 2021 11:10:54 +0100 [thread overview]
Message-ID: <047803b9-d09f-d4f8-a674-317cc19dd055@collabora.com> (raw)
In-Reply-To: <20211218082802.5256-3-chunfeng.yun@mediatek.com>
Il 18/12/21 09:28, Chunfeng Yun ha scritto:
> Add three helpers mtk_phy_clear/set/update_bits() for registers operation
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
> v2: new patch, add register access helpers,
> Add updatel() macro suggested by Vinod, here add more ones instead.
> ---
> drivers/phy/mediatek/phy-mtk-io.h | 38 +++++++++++++++++++++++++++++++
> 1 file changed, 38 insertions(+)
> create mode 100644 drivers/phy/mediatek/phy-mtk-io.h
>
> diff --git a/drivers/phy/mediatek/phy-mtk-io.h b/drivers/phy/mediatek/phy-mtk-io.h
> new file mode 100644
> index 000000000000..500fcdab165d
> --- /dev/null
> +++ b/drivers/phy/mediatek/phy-mtk-io.h
> @@ -0,0 +1,38 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (C) 2021 MediaTek Inc.
> + *
> + * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
> + */
> +
> +#ifndef __PHY_MTK_H__
> +#define __PHY_MTK_H__
> +
> +#include <linux/io.h>
> +
> +static inline void mtk_phy_clear_bits(void __iomem *reg, u32 bits)
> +{
> + u32 tmp = readl(reg);
> +
> + tmp &= ~bits;
> + writel(tmp, reg);
> +}
> +
> +static inline void mtk_phy_set_bits(void __iomem *reg, u32 bits)
> +{
> + u32 tmp = readl(reg);
> +
> + tmp |= bits;
> + writel(tmp, reg);
> +}
> +
> +static inline void mtk_phy_update_bits(void __iomem *reg, u32 mask, u32 val)
> +{
> + u32 tmp = readl(reg);
> +
> + tmp &= ~mask;
> + tmp |= val & mask;
> + writel(tmp, reg);
> +}
> +
> +#endif
>
These helpers are almost exactly duplicating what regmap_update_bits() is doing.
I appreciate the effort to stop open-coding the same sequences over and over by
adding such helper functions, but I think that the proper way of doing what you
are proposing is not to add custom functions but rather reuse what the Linux APIs
give you.
What about doing a conversion to use regmap on this driver?
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next prev parent reply other threads:[~2021-12-24 10:11 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-18 8:27 [PATCH v2 1/5] dt-bindings: phy: mediatek: tphy: support software efuse load Chunfeng Yun
2021-12-18 8:27 ` [PATCH v2 2/5] phy: phy-mtk-tphy: add support efuse setting Chunfeng Yun
2021-12-24 10:03 ` AngeloGioacchino Del Regno
2021-12-30 2:13 ` Chunfeng Yun
2021-12-18 8:28 ` [PATCH v2 3/5] phy: mediatek: add helpers to update bits of registers Chunfeng Yun
2021-12-24 10:10 ` AngeloGioacchino Del Regno [this message]
2021-12-30 2:06 ` Chunfeng Yun
2022-01-03 8:59 ` AngeloGioacchino Del Regno
2022-01-06 8:08 ` Chunfeng Yun
2021-12-18 8:28 ` [PATCH v2 4/5] phy: phy-mtk-xsphy: use new io helpers to access register Chunfeng Yun
2021-12-18 8:28 ` [PATCH v2 5/5] phy: phy-mtk-tphy: " Chunfeng Yun
2021-12-23 11:37 ` [PATCH v2 1/5] dt-bindings: phy: mediatek: tphy: support software efuse load Vinod Koul
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