linux-kernel - [PATCH v5 3/3] OMAP2+: voltage: add check for missing PMIC info in vp init

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Date:	Fri, 30 Sep 2011 11:42:33 +0530
From:	Abhilash K V <abhilash.kv@...com>
To:	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
CC:	<tony@...mide.com>, <linux@....linux.org.uk>, <b-cousson@...com>,
	<paul@...an.com>, <aneesh@...com>, <khilman@...com>,
	<santosh.shilimkar@...com>, <christian.gmeiner@...il.com>,
	Abhilash K V <abhilash.kv@...com>
Subject: [PATCH v5 3/3] OMAP2+: voltage: add check for missing PMIC info in vp init

From: Abhilash K V <abhilash.kv@...com>

If PMIC info is not available in omap_vp_init(), abort.

Signed-off-by: Abhilash K V <abhilash.kv@...com>
---
 arch/arm/mach-omap2/vp.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-omap2/vp.c b/arch/arm/mach-omap2/vp.c
index 66bd700..0ed3d13 100644
--- a/arch/arm/mach-omap2/vp.c
+++ b/arch/arm/mach-omap2/vp.c
@@ -41,6 +41,13 @@ void __init omap_vp_init(struct voltagedomain *voltdm)
 	u32 val, sys_clk_rate, timeout, waittime;
 	u32 vddmin, vddmax, vstepmin, vstepmax;
 
+	if (!voltdm->pmic || !voltdm->pmic->uv_to_vsel) {
+		pr_err("%s: PMIC info requried to configure VP for "
+			"vdd_%s not populated.Hence cannot initialize VP\n",
+			__func__, voltdm->name);
+		return;
+	}
+
 	if (!voltdm->read || !voltdm->write) {
 		pr_err("%s: No read/write API for accessing vdd_%s regs\n",
 			__func__, voltdm->name);
-- 
1.7.1

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