linux-kernel - [PATCH 7/7] ARM: OMAP4+: PM: Use only valid low power state for CPU hotplug

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Date:	Fri, 22 Aug 2014 08:49:33 -0500
From:	Nishanth Menon <nm@...com>
To:	Tony Lindgren <tony@...mide.com>
CC:	Kevin Hilman <khilman@...prootsystems.com>,
	Tero Kristo <t-kristo@...com>, Paul Walmsley <paul@...an.com>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	Keerthy <j-keerthy@...com>,
	Benoît Cousson <bcousson@...libre.com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	Nishanth Menon <nm@...com>
Subject: [PATCH 7/7] ARM: OMAP4+: PM: Use only valid low power state for CPU hotplug

Not all SoCs support OFF mode - for example DRA74/72. So, use valid
power state during CPU hotplug.

Signed-off-by: Nishanth Menon <nm@...com>
---
 arch/arm/mach-omap2/omap-mpuss-lowpower.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/mach-omap2/omap-mpuss-lowpower.c b/arch/arm/mach-omap2/omap-mpuss-lowpower.c
index 4001325..e9cdacf 100644
--- a/arch/arm/mach-omap2/omap-mpuss-lowpower.c
+++ b/arch/arm/mach-omap2/omap-mpuss-lowpower.c
@@ -298,6 +298,10 @@ int omap4_hotplug_cpu(unsigned int cpu, unsigned int power_state)
 	if (omap_rev() == OMAP4430_REV_ES1_0)
 		return -ENXIO;
 
+	/* Use the achievable power state for the domain */
+	power_state = pwrdm_get_valid_lp_state(pm_info->pwrdm,
+					       false, power_state);
+
 	if (power_state == PWRDM_POWER_OFF)
 		cpu_state = 1;
 
-- 
1.7.9.5

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