From: Rob Herring <robh@kernel.org>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Marek Vasut <marex@denx.de>,
devicetree@vger.kernel.org, Vignesh Raghavendra <vigneshr@ti.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Richard Weinberger <richard@nod.at>,
linux-kernel@vger.kernel.org,
Ley Foon Tan <ley.foon.tan@intel.com>,
Dinh Nguyen <dinguyen@kernel.org>,
linux-mtd@lists.infradead.org,
Philipp Zabel <p.zabel@pengutronix.de>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH v2 1/2] dt-binding: mtd: denali_dt: document reset property
Date: Thu, 19 Dec 2019 14:41:07 -0600 [thread overview]
Message-ID: <20191219204107.GA7670@bogus> (raw)
In-Reply-To: <20191211054538.8283-1-yamada.masahiro@socionext.com>
On Wed, 11 Dec 2019 14:45:37 +0900, Masahiro Yamada wrote:
> According to the Denali NAND Flash Memory Controller User's Guide,
> this IP has two reset signals.
>
> rst_n: reset most of FFs in the controller core
> reg_rst_n: reset all FFs in the register interface, and in the
> initialization sequencer
>
> This commit specifies those reset signals.
>
> It is possible to control them separately from the IP point of view
> although they might be often tied up together in actual SoC integration.
>
> At least for the upstream platforms, Altera/Intel SOCFPGA and Socionext
> UniPhier, the reset controller seems to provide only 1-bit control for
> the NAND controller. If it is the case, the resets property should
> reference to the same phandles for "nand" and "reg" resets, like this:
>
> resets = <&nand_rst>, <&nand_rst>;
> reset-names = "nand", "reg";
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> ---
>
> Changes in v2:
> - Split into two patches
>
> Documentation/devicetree/bindings/mtd/denali-nand.txt | 7 +++++++
> 1 file changed, 7 insertions(+)
>
Acked-by: Rob Herring <robh@kernel.org>
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WARNING: multiple messages have this Message-ID (diff)
From: Rob Herring <robh@kernel.org>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-mtd@lists.infradead.org, Dinh Nguyen <dinguyen@kernel.org>,
Marek Vasut <marex@denx.de>,
Ley Foon Tan <ley.foon.tan@intel.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
devicetree@vger.kernel.org,
Philipp Zabel <p.zabel@pengutronix.de>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Mark Rutland <mark.rutland@arm.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] dt-binding: mtd: denali_dt: document reset property
Date: Thu, 19 Dec 2019 14:41:07 -0600 [thread overview]
Message-ID: <20191219204107.GA7670@bogus> (raw)
In-Reply-To: <20191211054538.8283-1-yamada.masahiro@socionext.com>
On Wed, 11 Dec 2019 14:45:37 +0900, Masahiro Yamada wrote:
> According to the Denali NAND Flash Memory Controller User's Guide,
> this IP has two reset signals.
>
> rst_n: reset most of FFs in the controller core
> reg_rst_n: reset all FFs in the register interface, and in the
> initialization sequencer
>
> This commit specifies those reset signals.
>
> It is possible to control them separately from the IP point of view
> although they might be often tied up together in actual SoC integration.
>
> At least for the upstream platforms, Altera/Intel SOCFPGA and Socionext
> UniPhier, the reset controller seems to provide only 1-bit control for
> the NAND controller. If it is the case, the resets property should
> reference to the same phandles for "nand" and "reg" resets, like this:
>
> resets = <&nand_rst>, <&nand_rst>;
> reset-names = "nand", "reg";
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
> ---
>
> Changes in v2:
> - Split into two patches
>
> Documentation/devicetree/bindings/mtd/denali-nand.txt | 7 +++++++
> 1 file changed, 7 insertions(+)
>
Acked-by: Rob Herring <robh@kernel.org>
next prev parent reply other threads:[~2019-12-19 20:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-11 5:45 [PATCH v2 1/2] dt-binding: mtd: denali_dt: document reset property Masahiro Yamada
2019-12-11 5:45 ` Masahiro Yamada
2019-12-11 5:45 ` [PATCH v2 2/2] mtd: rawnand: denali_dt: add reset controlling Masahiro Yamada
2019-12-11 5:45 ` Masahiro Yamada
2019-12-12 0:22 ` Marek Vasut
2019-12-12 0:22 ` Marek Vasut
2019-12-12 3:33 ` Masahiro Yamada
2019-12-12 3:33 ` Masahiro Yamada
2019-12-19 20:41 ` Rob Herring [this message]
2019-12-19 20:41 ` [PATCH v2 1/2] dt-binding: mtd: denali_dt: document reset property Rob Herring
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