linux-kernel - Re: [PATCH v2 1/2] ARM: dts: vf610-colibri: Add PWM support

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Date:	Mon, 22 Sep 2014 10:08:33 +0530
From:	Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>
To:	Stefan Agner <stefan@...er.ch>
CC:	<shawn.guo@...escale.com>, <linux@....linux.org.uk>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] ARM: dts: vf610-colibri: Add PWM support


On Friday 19 September 2014 09:30 PM, Stefan Agner wrote:

> Am 2014-09-19 15:38, schrieb Bhuvanchandra DV:
>> The Colibri standard defines four pins as PWM outputs, two of them (PWM
>> A and C) are routed to FTM instance 0 and the other two (PWM B and D)
>> are routed to FTM instance 1. Hence enable both FTM instances for the
>> Colibri module and mux the four pins accordingly.
>>
>> Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>
>> ---
>>  arch/arm/boot/dts/vf610-colibri-eval-v3.dts |    8 +++++++
>>  arch/arm/boot/dts/vf610-colibri.dtsi        |   31 +++++++++++++++++++++++----
>>  2 files changed, 35 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/vf610-colibri-eval-v3.dts
>> b/arch/arm/boot/dts/vf610-colibri-eval-v3.dts
>> index 7fb3066..00f63d9 100644
>> --- a/arch/arm/boot/dts/vf610-colibri-eval-v3.dts
>> +++ b/arch/arm/boot/dts/vf610-colibri-eval-v3.dts
>> @@ -33,6 +33,14 @@
>>  	status = "okay";
>>  };
>>  
>> +&pwm0 {
>> +	status = "okay";
>> +};
>> +
>> +&pwm1 {
>> +	status = "okay";
>> +};
>> +
>>  &uart0 {
>>  	status = "okay";
>>  };
>> diff --git a/arch/arm/boot/dts/vf610-colibri.dtsi
>> b/arch/arm/boot/dts/vf610-colibri.dtsi
>> index 0cd8343..560cd69 100644
>> --- a/arch/arm/boot/dts/vf610-colibri.dtsi
>> +++ b/arch/arm/boot/dts/vf610-colibri.dtsi
>> @@ -13,10 +13,6 @@
>>  	model = "Toradex Colibri VF61 COM";
>>  	compatible = "toradex,vf610-colibri_vf61", "fsl,vf610";
>>  
>> -	memory {
>> -		reg = <0x80000000 0x10000000>;
>> -	};
>> -
>>  	clocks {
>>  		enet_ext {
>>  			compatible = "fixed-clock";
>> @@ -25,6 +21,9 @@
>>  		};
>>  	};
>>  
>> +	memory {
>> +		reg = <0x80000000 0x10000000>;
>> +	};
> Memory is a bit an exception here: In almost all device tree this is the
> first node after model/compatible. Also, it's generally not allowed to
> make changes outside of the topic (PWM in this case)... Hence I would
> drop this change.
>
> The rest
> Acked-By: Stefan Agner <stefan@...er.ch>

OK. Will drop the change.

>>  };
>>  
>>  &esdhc1 {
>> @@ -44,6 +43,16 @@
>>  	arm,tag-latency = <3 2 3>;
>>  };
>>  
>> +&pwm0 {
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&pinctrl_pwm0>;
>> +};
>> +
>> +&pwm1 {
>> +	pinctrl-names = "default";
>> +	pinctrl-0 = <&pinctrl_pwm1>;
>> +};
>> +
>>  &uart0 {
>>  	pinctrl-names = "default";
>>  	pinctrl-0 = <&pinctrl_uart0>;
>> @@ -97,6 +106,20 @@
>>  			>;
>>  		};
>>  
>> +		pinctrl_pwm0: pwm0grp {
>> +			fsl,pins = <
>> +				VF610_PAD_PTB0__FTM0_CH0		0x1182
>> +				VF610_PAD_PTB1__FTM0_CH1		0x1182
>> +			>;
>> +		};
>> +
>> +		pinctrl_pwm1: pwm1grp {
>> +			fsl,pins = <
>> +				VF610_PAD_PTB8__FTM1_CH0		0x1182
>> +				VF610_PAD_PTB9__FTM1_CH1		0x1182
>> +			>;
>> +		};
>> +
>>  		pinctrl_uart0: uart0grp {
>>  			fsl,pins = <
>>  				VF610_PAD_PTB10__UART0_TX		0x21a2

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