From: Romit Dasgupta <romit@ti.com>
To: paul@pwsan.com, nm@ti.com, khilman@deeprootsystems.com
Cc: "linux-omap@vger.kernel.org" <linux-omap@vger.kernel.org>
Subject: [PATCH 1/10] OPP layer and additional cleanups.
Date: Thu, 31 Dec 2009 18:59:05 +0530 [thread overview]
Message-ID: <1262266145.20175.177.camel@boson> (raw)
Cleaner way to take care of the precision loss during integer division.
diff --git a/arch/arm/plat-omap/opp_twl_tps.c b/arch/arm/plat-omap/opp_twl_tps.c
index e0db39b..43dee2d 100644
--- a/arch/arm/plat-omap/opp_twl_tps.c
+++ b/arch/arm/plat-omap/opp_twl_tps.c
@@ -36,14 +36,7 @@ unsigned long omap_twl_vsel_to_uv(const u8 vsel)
*/
u8 omap_twl_uv_to_vsel(unsigned long uv)
{
- u8 vsel;
+ /* Takes care of precision loss due to integer division */
+ return (((uv + 99) / 100 - 6000) + 124) / 125;
- vsel = ((uv / 100) - 6000) / 125;
-
- /* round off to higher voltage */
- /* XXX Surely not the best way to handle this. */
- if (uv > omap_twl_vsel_to_uv(vsel))
- vsel++;
-
- return vsel;
}
next reply other threads:[~2009-12-31 13:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-31 13:29 Romit Dasgupta [this message]
2010-01-04 22:04 ` [PATCH 1/10] OPP layer and additional cleanups Nishanth Menon
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