linux-kernel - [v4 1/6] ARM: tegra: Use DT /cpu node to detect number of CPU core

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Date:	Thu, 24 Jan 2013 13:10:21 +0200
From:	Hiroshi Doyu <hdoyu@...dia.com>
To:	<linux-tegra@...r.kernel.org>
CC:	Hiroshi Doyu <hdoyu@...dia.com>,
	Russell King <linux@....linux.org.uk>,
	Stephen Warren <swarren@...dotorg.org>,
	Olof Johansson <olof@...om.net>,
	Jason Cooper <jason@...edaemon.net>,
	Shawn Guo <shawn.guo@...aro.org>, Andrew Lunn <andrew@...n.ch>,
	Kukjin Kim <kgene.kim@...sung.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: [v4 1/6] ARM: tegra: Use DT /cpu node to detect number of CPU core

Tegra SoCs does not use SCU based to detect CPU core numbers but they
use DT /cpu node. If it's not provided or failed, it continues as a
single core.

Signed-off-by: Hiroshi Doyu <hdoyu@...dia.com>
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@....com>
---
Based on the discussion:
http://lists.infradead.org/pipermail/linux-arm-kernel/2013-January/140608.html
---
 arch/arm/mach-tegra/platsmp.c |   15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c
index 3ec7fc4..ee847896 100644
--- a/arch/arm/mach-tegra/platsmp.c
+++ b/arch/arm/mach-tegra/platsmp.c
@@ -177,23 +177,8 @@ done:
 	return status;
 }
 
-/*
- * Initialise the CPU possible map early - this describes the CPUs
- * which may be present or become present in the system.
- */
 static void __init tegra_smp_init_cpus(void)
 {
-	unsigned int i, ncores = scu_get_core_count(scu_base);
-
-	if (ncores > nr_cpu_ids) {
-		pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
-			ncores, nr_cpu_ids);
-		ncores = nr_cpu_ids;
-	}
-
-	for (i = 0; i < ncores; i++)
-		set_cpu_possible(i, true);
-
 	set_smp_cross_call(gic_raise_softirq);
 }
 
-- 
1.7.9.5

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