Messages in this thread | | | Subject | RE: [PATCH][i386] HPET setup, duplicate HPET_T0_CMP needed for some platforms | Date | Mon, 7 Feb 2005 11:47:00 -0800 | From | "Pallipadi, Venkatesh" <> |
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>-----Original Message----- >From: linux-kernel-owner@vger.kernel.org >[mailto:linux-kernel-owner@vger.kernel.org] On Behalf Of >Giuseppe Bilotta >Sent: Sunday, February 06, 2005 7:59 AM >To: linux-kernel@vger.kernel.org >Subject: Re: [PATCH][i386] HPET setup, duplicate HPET_T0_CMP >needed for some platforms > >Venkatesh Pallipadi wrote: >> + /* >> + * Some systems seems to need two writes to HPET_T0_CMP, >> + * to get interrupts working >> + */ >> + hpet_writel(tick, HPET_T0_CMP); >> hpet_writel(tick, HPET_T0_CMP); > >Is it known which platforms require two, and which ones require >one write? Is it cost-effective to #if CONFIG_ the second >write?
Additional write should not be performace critical, as this code is called only once, during boot up (and again during system suspend-resume).
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