linux-kernel - Re: [PATCH 2/3] ARM: dts: stm32mp157: Add missing pinctrl definitions

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Date:   Fri, 3 May 2019 09:13:27 +0200
From:   Alexandre Torgue <alexandre.torgue@...com>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        <mcoquelin.stm32@...il.com>, <robh+dt@...nel.org>
CC:     <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <loic.pallardy@...com>
Subject: Re: [PATCH 2/3] ARM: dts: stm32mp157: Add missing pinctrl definitions

Hi Mani

On 5/3/19 7:31 AM, Manivannan Sadhasivam wrote:
> Add missing pinctrl definitions for STM32MP157 MPU.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>   arch/arm/boot/dts/stm32mp157-pinctrl.dtsi | 62 +++++++++++++++++++++++
>   1 file changed, 62 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
> index 85c417d9983b..0b5bcf6a7c97 100644
> --- a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
> +++ b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
> @@ -241,6 +241,23 @@
>   				};
>   			};
>   
> +			i2c1_pins_b: i2c1-2 {
> +				pins {
> +					pinmux = <STM32_PINMUX('F', 14, AF5)>, /* I2C1_SCL */
> +						 <STM32_PINMUX('F', 15, AF5)>; /* I2C1_SDA */
> +					bias-disable;
> +					drive-open-drain;
> +					slew-rate = <0>;
> +				};
> +			};
> +
> +			i2c1_pins_sleep_b: i2c1-3 {
> +				pins {
> +					pinmux = <STM32_PINMUX('F', 14, ANALOG)>, /* I2C1_SCL */
> +						 <STM32_PINMUX('F', 15, ANALOG)>; /* I2C1_SDA */
> +				};
> +			};
> +
>   			i2c2_pins_a: i2c2-0 {
>   				pins {
>   					pinmux = <STM32_PINMUX('H', 4, AF4)>, /* I2C2_SCL */
> @@ -258,6 +275,23 @@
>   				};
>   			};
>   
> +			i2c2_pins_b: i2c2-2 {
> +				pins {
> +					pinmux = <STM32_PINMUX('Z', 0, AF3)>, /* I2C2_SCL */
> +						 <STM32_PINMUX('H', 5, AF4)>; /* I2C2_SDA */

You can't do that. <STM32_PINMUX('Z', 0, AF3)> has to be declared in 
pincontroller-z. So in your case, you have to define 2 groups for i2C2 
for your default state (the same for the sleep state).

regards
Alex




> +					bias-disable;
> +					drive-open-drain;
> +					slew-rate = <0>;
> +				};
> +			};
> +
> +			i2c2_pins_sleep_b: i2c2-3 {
> +				pins {
> +					pinmux = <STM32_PINMUX('Z', 0, ANALOG)>, /* I2C2_SCL */
> +						 <STM32_PINMUX('H', 5, ANALOG)>; /* I2C2_SDA */
> +				};
> +			};
> +
>   			i2c5_pins_a: i2c5-0 {
>   				pins {
>   					pinmux = <STM32_PINMUX('A', 11, AF4)>, /* I2C5_SCL */
> @@ -599,6 +633,34 @@
>   					bias-disable;
>   				};
>   			};
> +
> +			uart4_pins_b: uart4-1 {
> +				pins1 {
> +					pinmux = <STM32_PINMUX('D', 1, AF8)>; /* UART4_TX */
> +					bias-disable;
> +					drive-push-pull;
> +					slew-rate = <0>;
> +				};
> +				pins2 {
> +					pinmux = <STM32_PINMUX('B', 2, AF8)>; /* UART4_RX */
> +					bias-disable;
> +				};
> +			};
> +
> +			uart7_pins_a: uart7-0 {
> +				pins1 {
> +					pinmux = <STM32_PINMUX('E', 8, AF7)>; /* UART4_TX */
> +					bias-disable;
> +					drive-push-pull;
> +					slew-rate = <0>;
> +				};
> +				pins2 {
> +					pinmux = <STM32_PINMUX('E', 7, AF7)>, /* UART4_RX */
> +						 <STM32_PINMUX('E', 10, AF7)>, /* UART4_CTS */
> +						 <STM32_PINMUX('E', 9, AF7)>; /* UART4_RTS */
> +					bias-disable;
> +				};
> +			};
>   		};
>   
>   		pinctrl_z: pin-controller-z@...04000 {
>