linux-kernel - Re: [PATCH] arm64: dts: ti: k3-am62a7-sk: Add interrupt support for IO Expander

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Message-ID: <47bohluxljqwmehol6d6owgkf2zrlornyne6xi2zddhapgtwok@jukkjr7kwton>
Date:   Mon, 27 Nov 2023 21:31:48 +0530
From:   Jai Luthra <j-luthra@...com>
To:     Aradhya Bhatia <a-bhatia1@...com>
CC:     Nishanth Menon <nm@...com>, Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Devicetree List <devicetree@...r.kernel.org>,
        Linux Kernel List <linux-kernel@...r.kernel.org>,
        Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
        Devarsh Thakkar <devarsht@...com>
Subject: Re: [PATCH] arm64: dts: ti: k3-am62a7-sk: Add interrupt support for
 IO Expander

Hi Aradhya,

On Nov 09, 2023 at 00:46:52 +0530, Aradhya Bhatia wrote:
> The Hot Plug Detect (HPD) signal for the HDMI display travels from the
> on-board HDMI connector, through the IO Expander 1, and finally to the
> main_gpio1 line #23, of the SoC.
> 
> Add interrupt information for the IO Expander 1 (exp1).
> Also add pinmux info of main gpio 1, line #23.
> 
> Signed-off-by: Aradhya Bhatia <a-bhatia1@...com>

Reviewed-by: Jai Luthra <j-luthra@...com>

> ---
> 
> Notes:
> 
>   - HDMI display on AM62A7 is not in the mainline yet. All the patches,
>     including this one, required to enable HDMI display and HPD on
>     AM62A7 SK-EVM, can be found on my github fork in the branch
>     "next_am62a-v3"[0].
> 
> [0]: https://github.com/aradhya07/linux-ab/tree/next_am62a-v3
> 
>  arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
> index 8f64ac2c7568..560dad02ef62 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
> @@ -274,6 +274,12 @@ AM62AX_IOPAD(0x08c, PIN_OUTPUT, 2) /* (K19) GPMC0_WEn.MCASP1_AXR0 */
>  			AM62AX_IOPAD(0x084, PIN_INPUT, 2) /* (L18) GPMC0_ADVn_ALE.MCASP1_AXR2 */
>  		>;
>  	};
> +
> +	main_gpio1_ioexp_intr_pins_default: main-gpio1-ioexp-intr-default-pins {
> +		pinctrl-single,pins = <
> +			AM62AX_IOPAD(0x01d4, PIN_INPUT, 7) /* (C15) UART0_RTSn.GPIO1_23 */
> +		>;
> +	};
>  };
>  
>  &mcu_pmx0 {
> @@ -407,6 +413,12 @@ exp1: gpio@22 {
>  		reg = <0x22>;
>  		gpio-controller;
>  		#gpio-cells = <2>;
> +		interrupt-parent = <&main_gpio1>;
> +		interrupts = <23 IRQ_TYPE_EDGE_FALLING>;
> +		interrupt-controller;
> +		#interrupt-cells = <2>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&main_gpio1_ioexp_intr_pins_default>;
>  
>  		gpio-line-names = "GPIO_CPSW2_RST", "GPIO_CPSW1_RST",
>  				   "BT_EN_SOC", "MMC1_SD_EN",
> 
> base-commit: 2220f68f4504aa1ccce0fac721ccdb301e9da32f
> -- 
> 2.42.0
> 

-- 
Thanks,
Jai

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