linux-kernel - Re: [PATCH 6/7] ARM: imx: imx7ulp: support HSRUN mode

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Message-ID: <CAOMZO5BnfGdbDuobV=qi4zbzKriM0kNmAyd8zFCSdv2krVj=Og@mail.gmail.com>
Date:   Tue, 4 Feb 2020 10:50:41 -0300
From:   Fabio Estevam <festevam@...il.com>
To:     Peng Fan <peng.fan@....com>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Stephen Boyd <sboyd@...nel.org>, Abel Vesa <abel.vesa@....com>,
        Dong Aisheng <aisheng.dong@....com>,
        Leonard Crestez <leonard.crestez@....com>,
        Sascha Hauer <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>,
        Ping Bai <ping.bai@....com>,
        Yongcai Huang <Anson.Huang@....com>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>
Subject: Re: [PATCH 6/7] ARM: imx: imx7ulp: support HSRUN mode

Hi Peng,

On Tue, Feb 4, 2020 at 10:41 AM <peng.fan@....com> wrote:
>
> From: Peng Fan <peng.fan@....com>
>
> Configure pmprot to let ARM core could run into HSRUN mode.
>
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---

> +       writel_relaxed(BM_PMPROT_AHSRUN, smc1_base + SMC_PMPROT);

HSRUN cannot be configured unconditionally because if i.MX7ULP runs
with LDO-enabled it cannot run in HSRUN mode.