linux-kernel - Re: [PATCH] bus: ti-sysc: Fix clock handling for no-idle quirks

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Date:   Thu, 5 Sep 2019 17:17:04 +0300
From:   Grygorii Strashko <grygorii.strashko@...com>
To:     Tony Lindgren <tony@...mide.com>, <linux-omap@...r.kernel.org>
CC:     Dave Gerlach <d-gerlach@...com>, Faiz Abbas <faiz_abbas@...com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Keerthy <j-keerthy@...com>, Nishanth Menon <nm@...com>,
        Peter Ujfalusi <peter.ujfalusi@...com>,
        Roger Quadros <rogerq@...com>, Suman Anna <s-anna@...com>,
        Tero Kristo <t-kristo@...com>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Vignesh Raghavendra <vigneshr@...com>
Subject: Re: [PATCH] bus: ti-sysc: Fix clock handling for no-idle quirks



On 05/09/2019 17:03, Tony Lindgren wrote:
> NFSroot can fail on dra7 when cpsw is probed using ti-sysc interconnect
> target module driver as reported by Keerthy.
> 
> Device clocks and the interconnect target module may or may not be
> enabled by the bootloader on init, but we currently assume the clocks
> and module are on from the bootloader for "ti,no-idle" and
> "ti,no-idle-on-init" quirks as reported by Grygorii Strashko.
> 
> Let's fix the issue by always enabling clocks init, and
> never disable them for "ti,no-idle" quirk. For "ti,no-idle-on-init"
> quirk, we must decrement the usage count later on to allow PM
> runtime to idle the module if requested.
> 
> Fixes: 1a5cd7c23cc5 ("bus: ti-sysc: Enable all clocks directly during init to read revision")
> Cc: Keerthy <j-keerthy@...com>
> Cc: Vignesh Raghavendra <vigneshr@...com>
> Reported-by: Keerthy <j-keerthy@...com>
> Reported-by: Grygorii Strashko <grygorii.strashko@...com>
> Signed-off-by: Tony Lindgren <tony@...mide.com>
> ---
>   drivers/bus/ti-sysc.c | 48 +++++++++++++++++++++++++++++++++----------
>   1 file changed, 37 insertions(+), 11 deletions(-)
> 

Reviewed-by: Grygorii Strashko <grygorii.strashko@...com>

Thank you, Tony.

-- 
Best regards,
grygorii