linux-kernel - Re: [PATCH V2] ARM: imx: update the cpu power up timing setting on i.mx6sx

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Message-ID: <20181206015533.GW3987@dragon>
Date:   Thu, 6 Dec 2018 09:55:34 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Anson Huang <anson.huang@....com>
Cc:     "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH V2] ARM: imx: update the cpu power up timing setting on
 i.mx6sx

On Tue, Dec 04, 2018 at 03:17:45AM +0000, Anson Huang wrote:
> The sw2iso count should cover ARM LDO ramp-up time,
> the MAX ARM LDO ramp-up time may be up to more than
> 100us on some boards, this patch sets sw2iso to 0xf
> (~384us) which is the reset value, and it is much
> more safe to cover different boards, since we have
> observed that some customer boards failed with current
> setting of 0x2.
> 
> Fixes: 05136f0897b5 ("ARM: imx: support arm power off in cpuidle for i.mx6sx")
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> Reviewed-by: Fabio Estevam <festevam@...il.com>

Applied, thanks.