linux-kernel - Re: [PATCH] ARM: sti: stih410-clocks: Add PROC

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Message-ID: <5d44e490-f6c2-79d4-98da-1d3c7543b1a2@st.com>
Date:   Thu, 20 Oct 2016 15:50:10 +0200
From:   Patrice Chotard <patrice.chotard@...com>
To:     Peter Griffin <peter.griffin@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <kernel@...inux.com>
CC:     <lee.jones@...aro.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH] ARM: sti: stih410-clocks: Add PROC_STFE as a critical
 clock



On 10/18/2016 05:35 PM, Peter Griffin wrote:
> Once the ST frontend demux HW IP has been enabled, the clock can't
> be disabled otherwise the system will hang and the board will
> be unserviceable.
> 
> To allow balanced clock enable/disable calls in the driver we use
> the critical clock infrastructure to take an extra reference on the
> clock so the clock will never actually be disabled.
> 
> Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
> ---
>  arch/arm/boot/dts/stih410-clock.dtsi | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/stih410-clock.dtsi b/arch/arm/boot/dts/stih410-clock.dtsi
> index 8598eff..07c8ef9 100644
> --- a/arch/arm/boot/dts/stih410-clock.dtsi
> +++ b/arch/arm/boot/dts/stih410-clock.dtsi
> @@ -208,7 +208,8 @@
>  						     "clk-clust-hades",
>  						     "clk-hwpe-hades",
>  						     "clk-fc-hades";
> -				clock-critical = <CLK_ICN_CPU>,
> +				clock-critical = <CLK_PROC_STFE>,
> +						 <CLK_ICN_CPU>,
>  						 <CLK_TX_ICN_DMU>,
>  						 <CLK_EXT2F_A9>,
>  						 <CLK_ICN_LMI>,
> 

Acked-by: Patrice Chotard <patrice.chotard@...com>

Applied on sti-dt-for-4.10 branch

Thanks