linux-kernel - Re: [PATCH] power: reset: Add MAX77620 support

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Message-ID: <5877BE49.2010008@nvidia.com>
Date:   Thu, 12 Jan 2017 23:05:05 +0530
From:   Laxman Dewangan <ldewangan@...dia.com>
To:     Thierry Reding <thierry.reding@...il.com>
CC:     Sebastian Reichel <sre@...nel.org>,
        Martin Michlmayr <tbm@...ius.com>, <linux-pm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Chaitanya Bandi <bandik@...dia.com>
Subject: Re: [PATCH] power: reset: Add MAX77620 support


On Thursday 12 January 2017 11:05 PM, Thierry Reding wrote:
> * PGP Signed by an unknown key
>
> On Thu, Jan 12, 2017 at 10:06:24PM +0530, Laxman Dewangan wrote:
>> On Thursday 12 January 2017 09:45 PM, Thierry Reding wrote:
>>>
>>> +	dev_dbg(&pdev->dev, "event recorder: %#x\n", value);
>>> +
>>> +	system_power_controller = power;
>>> +	pm_power_off = max77620_pm_power_off;
>>> +#if defined(CONFIG_ARM) || defined(CONFIG_ARM64)
>>> +	arm_pm_restart = max77620_pm_restart;
>> What if we want to reset via the Tegra and not through PMIC?
> In that case I assume we either don't have a PMIC, or we should not add
> the system-power-controller device tree property to the PMIC node. In
> the latter case this driver won't install any power off or restart
> callbacks.


We need reset from Tegra and power of from PMIC. Tegra does not support 
power OFF.