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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>
This commit is contained in:
Nishanth Menon 2011-05-18 00:17:31 -05:00 committed by Kevin Hilman
parent 58e241f7be
commit 366494250b
1 changed files with 6 additions and 1 deletions
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5
arch/arm/mach-omap2/omap_twl.c
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@ -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 * hardcoding only for 1.35 V which is used for 1GH OPP for
* OMAP4430. * OMAP4430.
*/ */
if (uv > twl6030_vsel_to_uv(0x39)) {
if (uv == 1350000) if (uv == 1350000)
return 0x3A; 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) if (smps_offset & 0x8)
return DIV_ROUND_UP(uv - 709000, 12660) + 1; return DIV_ROUND_UP(uv - 709000, 12660) + 1;