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From: Rob Herring <robh@kernel.org>
To: Carlo Caione <ccaione@baylibre.com>
Cc: devicetree@vger.kernel.org, narmstrong@baylibre.com,
	khilman@baylibre.com, srinivas.kandagatla@linaro.org,
	linux-amlogic@lists.infradead.org, tglx@linutronix.de,
	linux-arm-kernel@lists.infradead.org, jbrunet@baylibre.com
Subject: Re: [PATCH v2 2/4] nvmem: meson-efuse: bindings: Add secure-monitor phandle
Date: Wed, 21 Aug 2019 13:14:58 -0500
Message-ID: <20190821181458.GA2886@bogus> (raw)
In-Reply-To: <20190731082339.20163-3-ccaione@baylibre.com>

On Wed, Jul 31, 2019 at 09:23:37AM +0100, Carlo Caione wrote:
> Add a new property to link the nvmem driver to the secure-monitor. The
> nvmem driver needs to access the secure-monitor to be able to access the
> fuses.
> 
> Signed-off-by: Carlo Caione <ccaione@baylibre.com>
> ---
>  Documentation/devicetree/bindings/nvmem/amlogic-efuse.txt | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/nvmem/amlogic-efuse.txt b/Documentation/devicetree/bindings/nvmem/amlogic-efuse.txt
> index 2e0723ab3384..f7b3ed74db54 100644
> --- a/Documentation/devicetree/bindings/nvmem/amlogic-efuse.txt
> +++ b/Documentation/devicetree/bindings/nvmem/amlogic-efuse.txt
> @@ -4,6 +4,7 @@ Required properties:
>  - compatible: should be "amlogic,meson-gxbb-efuse"
>  - clocks: phandle to the efuse peripheral clock provided by the
>  	  clock controller.
> +- secure-monitor: phandle to the secure-monitor node
>  
>  = Data cells =
>  Are child nodes of eFuse, bindings of which as described in
> @@ -16,6 +17,7 @@ Example:
>  		clocks = <&clkc CLKID_EFUSE>;
>  		#address-cells = <1>;
>  		#size-cells = <1>;
> +		secure-monitor = <&sm>;
>  
>  		sn: sn@14 {
>  			reg = <0x14 0x10>;
> @@ -30,6 +32,10 @@ Example:
>  		};
>  	};
>  
> +	sm: secure-monitor {
> +		compatible = "amlogic,meson-gxbb-sm";
> +	};

I guess I acked this a while back, but I'm not sure I would today. It 
seems incomplete and a node with only a compatible string and no 
resources doesn't need to be in DT. But that's already done...

There's no need for 'secure-monitor' anyways. Just do 
'of_find_compatible_node(NULL, NULL, "amlogic,meson-gxbb-sm")' or search 
for the driver directly. It's not like there's more than one secure 
monitor...

Rob

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  parent reply index

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-31  8:23 [PATCH v2 0/4] Rework secure-monitor driver Carlo Caione
2019-07-31  8:23 ` [PATCH v2 1/4] firmware: meson_sm: Mark chip struct as static const Carlo Caione
2019-07-31  8:23 ` [PATCH v2 2/4] nvmem: meson-efuse: bindings: Add secure-monitor phandle Carlo Caione
2019-08-06  8:25   ` Jerome Brunet
2019-08-15 21:20   ` Kevin Hilman
2019-08-21 18:14   ` Rob Herring [this message]
2019-08-22  8:36     ` Carlo Caione
2019-08-22  8:59     ` Jerome Brunet
2019-07-31  8:23 ` [PATCH v2 3/4] arm64: dts: meson: Link nvmem and secure-monitor nodes Carlo Caione
2019-08-06  8:26   ` Jerome Brunet
2019-07-31  8:23 ` [PATCH v2 4/4] firmware: meson_sm: Rework driver as a proper platform driver Carlo Caione
2019-08-06  8:23   ` Srinivas Kandagatla
2019-08-05 21:34 ` [PATCH v2 0/4] Rework secure-monitor driver Kevin Hilman
2019-08-06  8:25   ` Srinivas Kandagatla
2019-08-09 21:42     ` Kevin Hilman

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