linux-kernel - Re: [PATCH v3] ARM: dts: imx6qdl-rex: add gpio expander pca9535

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Date:   Wed, 16 Oct 2019 05:21:25 -0400 (EDT)
From:   Gilles Doffe <gilles.doffe@...oirfairelinux.com>
To:     shawnguo <shawnguo@...nel.org>
Cc:     devicetree <devicetree@...r.kernel.org>,
        rennes <rennes@...oirfairelinux.com>,
        Jérome Oufella 
        <jerome.oufella@...oirfairelinux.com>,
        robh+dt <robh+dt@...nel.org>,
        mark rutland <mark.rutland@....com>,
        s hauer <s.hauer@...gutronix.de>,
        kernel <kernel@...gutronix.de>, festevam <festevam@...il.com>,
        linux-imx <linux-imx@....com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] ARM: dts: imx6qdl-rex: add gpio expander pca9535

----- Le 7 Oct 19, à 13:24, shawnguo shawnguo@...nel.org a écrit :

> On Mon, Sep 16, 2019 at 12:43:53PM +0200, Gilles DOFFE wrote:
>> The pca9535 gpio expander is present on the Rex baseboard, but missing
>> from the dtsi.
>> The pca9535 is on i2c2 bus which is common to the three SOM
>> variants (Basic/Pro/Ultra), thus it is activated by default.
>> 
>> Add also the new gpio controller and the associated interrupt line
>> MX6QDL_PAD_NANDF_CS3__GPIO6_IO16.
>> 
>> Signed-off-by: Gilles DOFFE <gilles.doffe@...oirfairelinux.com>
>> ---
>>  arch/arm/boot/dts/imx6qdl-rex.dtsi | 19 +++++++++++++++++++
>>  1 file changed, 19 insertions(+)
>> 
>> diff --git a/arch/arm/boot/dts/imx6qdl-rex.dtsi
>> b/arch/arm/boot/dts/imx6qdl-rex.dtsi
>> index 97f1659144ea..8a748ca1b108 100644
>> --- a/arch/arm/boot/dts/imx6qdl-rex.dtsi
>> +++ b/arch/arm/boot/dts/imx6qdl-rex.dtsi
>> @@ -132,6 +132,19 @@
>>  	pinctrl-0 = <&pinctrl_i2c2>;
>>  	status = "okay";
>>  
>> +	pca9535: gpio8@27 {
> 
> gpio-expander might be a better node name?
> 
> Shawn

Indeed, v4 incoming. ;)

Thank you Shawn.

> 
>> +		compatible = "nxp,pca9535";
>> +		reg = <0x27>;
>> +		gpio-controller;
>> +		#gpio-cells = <2>;
>> +		pinctrl-names = "default";
>> +		pinctrl-0 = <&pinctrl_pca9535>;
>> +		interrupt-parent = <&gpio6>;
>> +		interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
>> +		interrupt-controller;
>> +		#interrupt-cells = <2>;
>> +	};
>> +
>>  	eeprom@57 {
>>  		compatible = "atmel,24c02";
>>  		reg = <0x57>;
>> @@ -237,6 +250,12 @@
>>  			>;
>>  		};
>>  
>> +		pinctrl_pca9535: pca9535 {
>> +			fsl,pins = <
>> +				MX6QDL_PAD_NANDF_CS3__GPIO6_IO16	0x17059
>> +		   >;
>> +		};
>> +
>>  		pinctrl_uart1: uart1grp {
>>  			fsl,pins = <
>>  				MX6QDL_PAD_CSI0_DAT10__UART1_TX_DATA	0x1b0b1
>> --
>> 2.20.1