linux-kernel - RE: [PATCH 1/4] arm64: dts: exynos: Add PWM interrupts on Exynos7

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Date:   Tue, 30 Jun 2020 20:54:28 +0530
From:   "Alim Akhtar" <alim.akhtar@...sung.com>
To:     "'Krzysztof Kozlowski'" <krzk@...nel.org>,
        "'Rob Herring'" <robh+dt@...nel.org>,
        "'Kukjin Kim'" <kgene@...nel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-samsung-soc@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Cc:     "'Marek Szyprowski'" <m.szyprowski@...sung.com>,
        "'Bartlomiej Zolnierkiewicz'" <b.zolnierkie@...sung.com>,
        "'Sylwester Nawrocki'" <snawrocki@...nel.org>,
        "'Chanwoo Choi'" <cw00.choi@...sung.com>,
        "'Pankaj Dubey'" <pankaj.dubey@...sung.com>
Subject: RE: [PATCH 1/4] arm64: dts: exynos: Add PWM interrupts on Exynos7

Hi Krzysztof,

> -----Original Message-----
> From: Krzysztof Kozlowski <krzk@...nel.org>
> Sent: 30 June 2020 02:15
> To: Rob Herring <robh+dt@...nel.org>; Kukjin Kim <kgene@...nel.org>;
> Krzysztof Kozlowski <krzk@...nel.org>; devicetree@...r.kernel.org;
linux-arm-
> kernel@...ts.infradead.org; linux-samsung-soc@...r.kernel.org; linux-
> kernel@...r.kernel.org
> Cc: Marek Szyprowski <m.szyprowski@...sung.com>; Bartlomiej Zolnierkiewicz
> <b.zolnierkie@...sung.com>; Sylwester Nawrocki <snawrocki@...nel.org>;
> Alim Akhtar <alim.akhtar@...sung.com>; Chanwoo Choi
> <cw00.choi@...sung.com>; Pankaj Dubey <pankaj.dubey@...sung.com>
> Subject: [PATCH 1/4] arm64: dts: exynos: Add PWM interrupts on Exynos7
> 
> Add required interrupts to PWM node on Exynos7.  This fixes DT schema
> warning:
> 
>     pwm@...c0000: 'interrupts' is a required property
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> 
> ---
> 
> Not tested
> ---
>  arch/arm64/boot/dts/exynos/exynos7.dtsi | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/exynos/exynos7.dtsi
> b/arch/arm64/boot/dts/exynos/exynos7.dtsi
> index f590891efe25..523547b3d539 100644
> --- a/arch/arm64/boot/dts/exynos/exynos7.dtsi
> +++ b/arch/arm64/boot/dts/exynos/exynos7.dtsi
> @@ -581,6 +581,11 @@
>  		pwm: pwm@...c0000 {
>  			compatible = "samsung,exynos4210-pwm";
>  			reg = <0x136c0000 0x100>;
> +			interrupts = <GIC_SPI 444 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 445 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 446 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 447 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 448 IRQ_TYPE_LEVEL_HIGH>;
PWM IRQs are from 449 ~ 453 for PWM[0] ~ PWM[4] on this SoC.
444 ~ 447 are for HSI2C and 448 is for ADC.
Please see the exynos7.dtsi
Also drivers/pwm/pwm-samsung.c does not uses interrupt at all, still we need
interrupts property to be added here?

>  			samsung,pwm-outputs = <0>, <1>, <2>, <3>;
>  			#pwm-cells = <3>;
>  			clocks = <&clock_peric0 PCLK_PWM>;
> --
> 2.17.1