From mboxrd@z Thu Jan 1 00:00:00 1970 From: thierry.reding@gmail.com (Thierry Reding) Date: Sat, 28 Jun 2014 01:44:21 +0200 Subject: [RFC 2/4] ARM: tegra: Add legacy interrupt controller nodes In-Reply-To: <53ADDAEF.2070805@wwwdotorg.org> References: <1403888329-24755-1-git-send-email-thierry.reding@gmail.com> <1403888329-24755-2-git-send-email-thierry.reding@gmail.com> <53ADDAEF.2070805@wwwdotorg.org> Message-ID: <20140627234420.GC26184@ulmo> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, Jun 27, 2014 at 02:58:23PM -0600, Stephen Warren wrote: > On 06/27/2014 10:58 AM, Thierry Reding wrote: > > From: Thierry Reding > > > > Add device tree nodes for the legacy interrupt controller so that the > > driver can get the register ranges from device tree rather than hard- > > coding them. > > > diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi > > > + interrupt-controller at 60004000 { > > + compatible = "nvidia,tegra20-ictlr"; > > + reg = <0x60004000 0x40 /* primary controller */ > > + 0x60004100 0x40 /* secondary controller */ > > + 0x60004200 0x40 /* tertiary controller */ > > + 0x60004300 0x40 /* quaternary controller */ > > + 0x60004400 0x40>; /* quinary controller */ > > + }; > > The quinary controller doesn't exist on Tegra20. Right, I've dropped it. > > diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi > > > + interrupt-controller at 60004000 { > > + compatible = "nvidia,tegra20-ictlr"; > > At the least, each SoC should have an SoC-specific compatible value in > addition to the base Tegra20 value in case we need to differentiate them > in the future. > > I'd be tempted to only include the SoC-specific value and omit the > Tegra20-specific value so we don't have to care whether they're really > 100% backwards-compatible, but it's probably safe to say they're all > Tegra20 compatible (or all Tegra30 compatible given the 4-vs-5 > controllers difference). I've looked at the register specification files and I can't see any differences between Tegra20, Tegra30, Tegra114 and Tegra124. Except for the absence of a quinary controller on Tegra20. I think I'll go with this: tegra114.dtsi: compatible = "nvidia,tegra114-ictlr", "nvidia,tegra30-ictlr"; tegra124.dtsi: compatible = "nvidia,tegra124-ictlr", "nvidia,tegra30-ictlr"; tegra20.dtsi: compatible = "nvidia,tegra20-ictlr"; tegra30.dtsi: compatible = "nvidia,tegra30-ictlr"; Thierry -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 819 bytes Desc: not available URL: