linux-kernel - [PATCH 2/2] omap_twl: Prevent SR to enable for am3517/am3505 devices

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Message-ID: <1312473569-1212-1-git-send-email-abhilash.kv@ti.com>
Date:	Thu, 4 Aug 2011 21:29:29 +0530
From:	Abhilash K V <abhilash.kv@...com>
To:	<linux-omap@...r.kernel.org>
CC:	<tony@...mide.com>, <linux@....linux.org.uk>, <b-cousson@...com>,
	<paul@...an.com>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, Vaibhav Hiremath <hvaibhav@...com>,
	Abhilash K V <abhilash.kv@...com>
Subject: [PATCH 2/2] omap_twl: Prevent SR to enable for am3517/am3505 devices

From: Vaibhav Hiremath <hvaibhav@...com>

In case of AM3517 & AM3505, Smart Reflex is not applicable so
we must not enable it. So add check for am3517/05 cpu revision
in omap3_twl_init() and return -ENODEV if true, else continue.

Signed-off-by: Vaibhav Hiremath <hvaibhav@...com>
Signed-off-by: Abhilash K V <abhilash.kv@...com>
---
 arch/arm/mach-omap2/omap_twl.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/omap_twl.c b/arch/arm/mach-omap2/omap_twl.c
index 07d6140..92fadcb 100644
--- a/arch/arm/mach-omap2/omap_twl.c
+++ b/arch/arm/mach-omap2/omap_twl.c
@@ -269,6 +269,14 @@ int __init omap3_twl_init(void)
 	if (!cpu_is_omap34xx())
 		return -ENODEV;
 
+	/*
+	 * In case of AM3517/AM3505 we should not be going down
+	 * further, since SR is not applicable there.
+	 */
+	if (cpu_is_omap3505() || cpu_is_omap3517()) {
+		return -ENODEV;
+	}
+
 	if (cpu_is_omap3630()) {
 		omap3_mpu_volt_info.vp_vddmin = OMAP3630_VP1_VLIMITTO_VDDMIN;
 		omap3_mpu_volt_info.vp_vddmax = OMAP3630_VP1_VLIMITTO_VDDMAX;
-- 
1.7.1

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