linux-kernel - Re: [PATCH 2/7] includes: dt-bindings: Add STM32F429 pinctrl DT bindings

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Date:	Thu, 15 Oct 2015 12:14:59 +0100
From:	Daniel Thompson <daniel.thompson@...aro.org>
To:	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Mark Rutland <mark.rutland@....com>,
	Rob Herring <robh+dt@...nel.org>, linux-gpio@...r.kernel.org
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	afaerber@...e.de, devicetree@...r.kernel.org, bruherrera@...il.com
Subject: Re: [PATCH 2/7] includes: dt-bindings: Add STM32F429 pinctrl DT
 bindings

On 14/10/15 21:07, Maxime Coquelin wrote:
> Signed-off-by: Maxime Coquelin <mcoquelin.stm32@...il.com>
> ---
>   include/dt-bindings/pinctrl/pinctrl-stm32.h     |   12 +
>   include/dt-bindings/pinctrl/stm32f429-pinfunc.h | 1241 +++++++++++++++++++++++
>   2 files changed, 1253 insertions(+)
>   create mode 100644 include/dt-bindings/pinctrl/pinctrl-stm32.h
>   create mode 100644 include/dt-bindings/pinctrl/stm32f429-pinfunc.h
>
> diff --git a/include/dt-bindings/pinctrl/pinctrl-stm32.h b/include/dt-bindings/pinctrl/pinctrl-stm32.h
> new file mode 100644
> index 0000000..a2e7222
> --- /dev/null
> +++ b/include/dt-bindings/pinctrl/pinctrl-stm32.h
> @@ -0,0 +1,12 @@
> +#ifndef _DT_BINDINGS_PINCTRL_STM32_H
> +#define _DT_BINDINGS_PINCTRL_STM32_H
> +
> +#define STM32_PIN_NO(x) ((x) << 8)
> +#define STM32_GET_PIN_NO(x) ((x) >> 8)
> +#define STM32_GET_PIN_FUNC(x) ((x) & 0xff)
> +
> +#define STM32_PIN_GPIO		0
> +#define STM32_PIN_AF(x)		((x) + 1)
> +#define STM32_PIN_ANALOG	(STM32_PIN_AF(15) + 1)
> +
> +#endif /* _DT_BINDINGS_PINCTRL_STM32_H */
> diff --git a/include/dt-bindings/pinctrl/stm32f429-pinfunc.h b/include/dt-bindings/pinctrl/stm32f429-pinfunc.h
> new file mode 100644
> index 0000000..979e4eb
> --- /dev/null
> +++ b/include/dt-bindings/pinctrl/stm32f429-pinfunc.h
> @@ -0,0 +1,1241 @@
> +#ifndef _DT_BINDINGS_STM32F429_PINFUNC_H
> +#define _DT_BINDINGS_STM32F429_PINFUNC_H
> +
> +#include <dt-bindings/pinctrl/pinctrl-stm32.h>
> +
> +#define STM32F429_PA0_FUNC_GPIO (STM32_PIN_NO(0) | STM32_PIN_GPIO)
> +#define STM32F429_PA0_FUNC_TIM2_CH1 TIM2_ETR (STM32_PIN_NO(0) | STM32_PIN_AF(1))

For the clock driver I was advised to get rid of this sort of "heroics" 
and expose raw numbers from the datasheet directly to DT bindings users.

Should the same logic apply to this *huge* collection of macros?
--
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