Messages in this thread | | | From | Hiroshi Doyu <> | Date | Tue, 24 Apr 2012 14:39:30 +0200 | Subject | Re: [PATCH v2 2/3] ARM: tegra: Add SMMU enabler in AHB |
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From: Felipe Balbi <balbi@ti.com> Subject: Re: [PATCH v2 2/3] ARM: tegra: Add SMMU enabler in AHB Date: Tue, 24 Apr 2012 14:32:52 +0200 Message-ID: <20120424123248.GG8444@arwen.pp.htv.fi>
> * PGP Signed by an unknown key > > Hi, > > On Tue, Apr 24, 2012 at 03:05:15PM +0300, Hiroshi DOYU wrote: > > @@ -95,6 +98,21 @@ static inline void gizmo_writel(unsigned long value, unsigned long offset) > > writel(value, tegra_ahb->regs + offset); > > } > > > > +#ifdef CONFIG_ARCH_TEGRA_3x_SOC > > + > > +void tegra_ahb_enable_smmu(void) > > +{ > > + unsigned long val; > > + > > + val = gizmo_readl(AHB_ARBITRATION_XBAR_CTRL); > > + val |= AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE_DONE << > > + AHB_ARBITRATION_XBAR_CTRL_SMMU_INIT_DONE_SHIFT; > > + gizmo_writel(val, AHB_ARBITRATION_XBAR_CTRL); > > +} > > +EXPORT_SYMBOL(tegra_ahb_enable_smmu); > > ok, so this is the only place where you need that global pointer. Who > would call this ? Can you do runtime detection of the SoC and enable > SMMU based on that ? > > I mean, will this function always be called for TEGRA 3 SoCs or is there > another condition to that ?
Only Tegra3 has SMMU.
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