From: Rob Herring <robh@kernel.org>
To: Kapil Hali <kapilh@broadcom.com>
Cc: Pawel Moll <pawel.moll@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Ian Campbell <ijc+devicetree@hellion.org.uk>,
Kumar Gala <galak@codeaurora.org>,
Russell King <linux@arm.linux.org.uk>,
Ray Jui <rjui@broadcom.com>,
Scott Branden <sbranden@broadcom.com>,
Jon Mason <jonmason@broadcom.com>,
Florian Fainelli <f.fainelli@gmail.com>,
Gregory Fong <gregory.0xf0@gmail.com>, Lee Jones <lee@kernel.org>,
Hauke Mehrtens <hauke@hauke-m.de>,
Heiko Stuebner <heiko@sntech.de>,
Kever Yang <kever.yang@rock-chips.com>,
Maxime Ripard <maxime.ripard@free-electrons.com>,
Olof Johansson <olof@lixom.net>, Paul Walmsley <paul@pwsan.com>,
Linus Walleij <linus.walleij@linaro.org>,
Chen-Yu Tsai <wens@csie.org>,
devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com
Subject: Re: [PATCH RESEND 1/4] dt-bindings: add SMP enable-method for Broadcom NSP
Date: Thu, 5 Nov 2015 14:48:25 -0600 [thread overview]
Message-ID: <20151105204825.GA19314@rob-hp-laptop> (raw)
In-Reply-To: <1446702681-45339-2-git-send-email-kapilh@broadcom.com>
On Thu, Nov 05, 2015 at 12:51:18AM -0500, Kapil Hali wrote:
> Add a compatible string "brcm,bcm-nsp-smp" for Broadcom's
> Northstar Plus CPU to the 32-bit ARM CPU device tree binding
> documentation file and create a new binding documentation for
> Northstar Plus CPU pen-release mechanism.
>
> Signed-off-by: Kapil Hali <kapilh@broadcom.com>
> ---
> .../bindings/arm/bcm/brcm,nsp-cpu-method.txt | 36 ++++++++++++++++++++++
> Documentation/devicetree/bindings/arm/cpus.txt | 1 +
> 2 files changed, 37 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
>
> diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
> new file mode 100644
> index 0000000..8506da7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt
> @@ -0,0 +1,36 @@
> +Broadcom Northstar Plus SoC CPU Enable Method
> +---------------------------------------------
> +This binding defines the enable method used for starting secondary
> +CPUs in the following Broadcom SoCs:
> + BCM58522, BCM58525, BCM58535, BCM58622, BCM58623, BCM58625, BCM88312
> +
> +The enable method is specified by defining the following required
> +properties in the "cpus" device tree node:
> + - enable-method = "brcm,bcm-nsp-smp";
This is supposed to be per core.
> + - secondary-boot-reg = <...>;
What happens with more than 2 cores?
> +The secondary-boot-reg property is a u32 value that specifies the
> +physical address of the register used to request the ROM holding pen
> +code release a secondary CPU.
> +
> +Example:
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + enable-method = "brcm,bcm-nsp-smp";
> + secondary-boot-reg = <0xffff042c>;
> +
> + cpu0: cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a9";
> + next-level-cache = <&L2>;
> + reg = <0>;
> + };
> +
> + cpu1: cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a9";
> + next-level-cache = <&L2>;
> + reg = <1>;
> + };
> + };
> diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
> index 91e6e5c..6abe3f3 100644
> --- a/Documentation/devicetree/bindings/arm/cpus.txt
> +++ b/Documentation/devicetree/bindings/arm/cpus.txt
> @@ -191,6 +191,7 @@ nodes to be present and contain the properties described below.
> "allwinner,sun8i-a23"
> "arm,psci"
> "brcm,brahma-b15"
> + "brcm,bcm-nsp-smp"
> "marvell,armada-375-smp"
> "marvell,armada-380-smp"
> "marvell,armada-390-smp"
> --
> 2.1.0
>
next prev parent reply other threads:[~2015-11-05 20:48 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-05 5:51 [PATCH RESEND 0/4] SMP support for Broadcom NSP Kapil Hali
2015-11-05 5:51 ` [PATCH RESEND 1/4] dt-bindings: add SMP enable-method " Kapil Hali
2015-11-05 20:48 ` Rob Herring [this message]
2015-11-05 20:57 ` Scott Branden
2015-11-05 5:51 ` [PATCH RESEND 2/4] ARM: dts: add SMP support " Kapil Hali
2015-11-05 5:51 ` [PATCH RESEND 3/4] ARM: BCM: Add " Kapil Hali
2015-11-05 9:44 ` Linus Walleij
2015-11-06 12:15 ` Kapil Hali
2015-11-16 23:35 ` kbuild test robot
2015-11-05 5:51 ` [PATCH RESEND 4/4] ARM: BCM: Add SMP support for Broadcom 4708 Kapil Hali
2015-11-05 9:34 ` [PATCH RESEND 0/4] SMP support for Broadcom NSP Russell King - ARM Linux
2015-11-05 20:25 ` Hauke Mehrtens
2015-11-06 12:25 ` Kapil Hali
2015-11-06 12:09 ` Kapil Hali
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