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Date: Fri, 26 Sep 2014 03:14:26 +0000 From: "Li.Xiubo@...escale.com" <Li.Xiubo@...escale.com> To: Shengchao Guo <Shawn.Guo@...escale.com> CC: "shawn.guo@...aro.org" <shawn.guo@...aro.org>, "mark.rutland@....com" <mark.rutland@....com>, "u.kleine-koenig@...gutronix.de" <u.kleine-koenig@...gutronix.de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org> Subject: RE: [PATCH v3] ARM: ls1021a: add gating clocks to IP blocks. > > > As the parent of the clocks registered by this function is "dummy" from > > > what I see, what is the point of setting flag CLK_SET_RATE_PARENT then? > > > > > > > + CLK_IGNORE_UNUSED, reg, shift, > > > > > > Why flag CLK_IGNORE_UNUSED? > > > > > > > As the SoC reference manual all the IP blocks will be enabled when powered > up. > > But the Linux OS will disable all the IP blocks' clocks as default without > this. > > > > For now, this gate driver will only used for PM support of some IP blocks. > For the > > Others needed to be enabled as default. > > Ok, got it. I'm fine with the flag then, and we can remove it after all > those client devices manage their clocks well. > Okay. Thanks, BRs Xiubo > Shawn -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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