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 a66bf6b..5def7c2 100644 (file)
--- 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;