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From: Peter De Schrijver <pdeschrijver@nvidia.com>
To: Stefan Agner <stefan@agner.ch>
Cc: <boris.brezillon@bootlin.com>, <dwmw2@infradead.org>,
	<computersforpeace@gmail.com>, <marek.vasut@gmail.com>,
	<robh+dt@kernel.org>, <mark.rutland@arm.com>,
	<thierry.reding@gmail.com>, <mturquette@baylibre.com>,
	<sboyd@kernel.org>, <dev@lynxeye.de>, <miquel.raynal@bootlin.com>,
	<richard@nod.at>, <marcel@ziswiler.com>, <krzk@kernel.org>,
	<digetx@gmail.com>, <benjamin.lindqvist@endian.se>,
	<jonathanh@nvidia.com>, <pgaikwad@nvidia.com>,
	<mirza.krak@gmail.com>, <linux-mtd@lists.infradead.org>,
	<linux-tegra@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <linux-clk@vger.kernel.org>
Subject: Re: [PATCH v2 4/6] clk: tegra20: init NDFLASH clock to sensible rate
Date: Mon, 28 May 2018 10:55:10 +0300	[thread overview]
Message-ID: <20180528075510.GQ6835@tbergstrom-lnx.Nvidia.com> (raw)
In-Reply-To: <20180527215442.14760-5-stefan@agner.ch>

On Sun, May 27, 2018 at 11:54:40PM +0200, Stefan Agner wrote:
> From: Lucas Stach <dev@lynxeye.de>
> 
> Set up the NAND Flash controller clock to run at 150MHz
> instead of the rate set by the bootloader. This is a
> conservative rate which also yields good performance.
> 
> Signed-off-by: Lucas Stach <dev@lynxeye.de>
> Signed-off-by: Stefan Agner <stefan@agner.ch>
> ---
>  drivers/clk/tegra/clk-tegra20.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/clk/tegra/clk-tegra20.c b/drivers/clk/tegra/clk-tegra20.c
> index 0ee56dd04cec..dff8c425cd28 100644
> --- a/drivers/clk/tegra/clk-tegra20.c
> +++ b/drivers/clk/tegra/clk-tegra20.c
> @@ -1049,6 +1049,7 @@ static struct tegra_clk_init_table init_table[] __initdata = {
>  	{ TEGRA20_CLK_GR2D, TEGRA20_CLK_PLL_C, 300000000, 0 },
>  	{ TEGRA20_CLK_GR3D, TEGRA20_CLK_PLL_C, 300000000, 0 },
>  	{ TEGRA20_CLK_VDE, TEGRA20_CLK_CLK_MAX, 300000000, 0 },
> +	{ TEGRA20_CLK_NDFLASH, TEGRA20_CLK_PLL_P, 150000000, 0 },
>  	/* must be the last entry */
>  	{ TEGRA20_CLK_CLK_MAX, TEGRA20_CLK_CLK_MAX, 0, 0 },
>  };
> -- 
> 2.17.0
> 

Maybe better to specify this in the Tegra20 dtsi? See 
"Assigned clock parents and rates" in Documentation/devicetree/bindings/clock/clock-bindings.txt

Peter.

  reply	other threads:[~2018-05-28  7:55 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-27 21:54 [PATCH v2 4/6] clk: tegra20: init NDFLASH clock to sensible rate Stefan Agner
2018-05-28  7:55 ` Peter De Schrijver [this message]
2018-05-28 15:53   ` Stefan Agner
2018-05-28 15:58     ` Lucas Stach
2018-05-29  7:48     ` Peter De Schrijver
2018-05-29 12:12       ` Stefan Agner
2018-05-29 12:19         ` Dmitry Osipenko
2018-05-30  7:42           ` Peter De Schrijver

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