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

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Date:   Mon, 6 May 2019 15:29:51 +0530
From:   Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To:     Alexandre Torgue <alexandre.torgue@...com>
Cc:     mcoquelin.stm32@...il.com, robh+dt@...nel.org,
        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 Alex,

On Fri, May 03, 2019 at 09:13:27AM +0200, Alexandre Torgue wrote:
> 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).
> 

Ah, yes I failed to note pincontroller z. Will fix it in next revision!

Thanks,
Mani

> 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 {
> >