linux-kernel - Re: [PATCH] ARM: dts: da850-evm: add clock properties to the nand node

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Date:   Tue, 6 Feb 2018 16:37:19 +0530
From:   Sekhar Nori <nsekhar@...com>
To:     Bartosz Golaszewski <brgl@...ev.pl>,
        Kevin Hilman <khilman@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        David Lechner <david@...hnology.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH] ARM: dts: da850-evm: add clock properties to the nand
 node

On Monday 05 February 2018 09:22 PM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> 
> Make nand work with the common clock framework by specifying which
> clock should be used and what name to look up.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> ---
>  arch/arm/boot/dts/da850-evm.dts | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
> index a86a8a1816f2..2602ad8e99ee 100644
> --- a/arch/arm/boot/dts/da850-evm.dts
> +++ b/arch/arm/boot/dts/da850-evm.dts
> @@ -296,6 +296,9 @@
>  			reg = <0 0x02000000 0x02000000
>  			       1 0x00000000 0x00008000>;
>  
> +			clocks = <&psc0 3>;
> +			clock-names = "aemif";

Looks like this is being added only to satisfy the devm_clk_get() call
in nand_davinci_probe() which I think is superfluous since we also
enable the same clock in aemif_probe().

Perhaps the better solution is to drip the clk code in
drivers/mtd/nand/davinci_nand.c and shift legacy code to start using
drivers/memory/aemif.c as well? This way we can also drop
arch/arm/mach-davinci/aemif.c

Thanks,
Sekhar