From: Nishanth Menon <nm@ti.com>
Date: Wed, 18 May 2011 05:17:31 +0000 (-0500)
Subject: OMAP4: PM: TWL6030: fix uv to voltage for >0x39
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=366494250b60af14fbab4d94d6bb1d1b6d17f10b;p=linux-beck.git

OMAP4: PM: TWL6030: fix uv to voltage for >0x39

using 1.35V as a check is not correct, we know that beyond 0x39,
voltages are non linear - hence use the conversion iff uV greater
than that for 0x39. For example, with  709mV as the smps offset,
the max linear is actually 1.41V(0x39vsel)!

Signed-off-by: Nishanth Menon <nm@ti.com>
---

diff --git a/arch/arm/mach-omap2/omap_twl.c b/arch/arm/mach-omap2/omap_twl.c
index a66bf6b9fb05..5def7c274f75 100644
--- a/arch/arm/mach-omap2/omap_twl.c
+++ b/arch/arm/mach-omap2/omap_twl.c
@@ -134,8 +134,13 @@ static u8 twl6030_uv_to_vsel(unsigned long uv)
 	 * hardcoding only for 1.35 V which is used for 1GH OPP for
 	 * OMAP4430.
 	 */
-	if (uv == 1350000)
+	if (uv > twl6030_vsel_to_uv(0x39)) {
+		if (uv == 1350000)
+			return 0x3A;
+		pr_err("%s:OUT OF RANGE! non mapped vsel for %ld Vs max %ld\n",
+			__func__, uv, twl6030_vsel_to_uv(0x39));
 		return 0x3A;
+	}
 
 	if (smps_offset & 0x8)
 		return DIV_ROUND_UP(uv - 709000, 12660) + 1;