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Message-ID: <20190723084213.GR5447@atomide.com>
Date: Tue, 23 Jul 2019 01:42:13 -0700
From: Tony Lindgren <tony@...mide.com>
To: David Lechner <david@...hnology.com>
Cc: linux-iio@...r.kernel.org, linux-omap@...r.kernel.org,
devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
BenoƮt Cousson <bcousson@...libre.com>,
William Breathitt Gray <vilhelm.gray@...il.com>,
Thierry Reding <thierry.reding@...il.com>,
linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org
Subject: Re: [PATCH 3/4] ARM: dts: am33xx: Add nodes for eQEP
* David Lechner <david@...hnology.com> [190722 15:46]:
> This adds new nodes for the Texas Instruments Enhanced Quadrature
> Encoder Pulse (eQEP) module in the PWM subsystem on AM33XX.
>
> Signed-off-by: David Lechner <david@...hnology.com>
> ---
> arch/arm/boot/dts/am33xx-l4.dtsi | 27 +++++++++++++++++++++++++++
> 1 file changed, 27 insertions(+)
>
> diff --git a/arch/arm/boot/dts/am33xx-l4.dtsi b/arch/arm/boot/dts/am33xx-l4.dtsi
> index 3b1fb2ba4dff..7fdc2f61c553 100644
> --- a/arch/arm/boot/dts/am33xx-l4.dtsi
> +++ b/arch/arm/boot/dts/am33xx-l4.dtsi
> @@ -1908,6 +1908,15 @@
> status = "disabled";
> };
>
> + eqep0: eqep@180 {
> + compatible = "ti,am3352-eqep";
> + reg = <0x180 0x80>;
> + clocks = <&l4ls_gclk>;
> + clock-names = "fck";
> + interrupts = <79>;
> + status = "disabled";
> + };
> +
You probably no longer need to map any clocks here as this
is now a child of the interconnect target module managed
by ti-sysc driver. I have not checked but probably l4ls_gclk
is same as clocks = <&l4ls_clkctrl AM3_L4LS_EPWMSS0_CLKCTRL 0>
already managed by ti-sysc. If so, then just using runtime PM
calls in any of the child device drivers will keep it enabled.
If l4ls_gclk is a separate functional clock, then it still
needs to be managed by the child device driver directly.
Regards,
Tony
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