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From: Corentin Labbe <clabbe.montjoie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [PATCHv4 3/8] rtc: add STM32 RTC driver
Date: Wed, 11 Jan 2017 14:04:38 +0100
Message-ID: <20170111130438.GA9327@Red>
References: <1484138905-5903-1-git-send-email-amelie.delaunay@st.com>
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To: Amelie Delaunay <amelie.delaunay-qxv4g6HH51o@public.gmane.org>
Cc: Alessandro Zummo <a.zummo-BfzFCNDTiLLj+vYz1yj4TQ@public.gmane.org>, Alexandre Belloni <alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>, Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>, Maxime Coquelin <mcoquelin.stm32-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Alexandre Torgue <alexandre.torgue-qxv4g6HH51o@public.gmane.org>, Russell King <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, rtc-linux-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Gabriel Fernandez <gabriel.fernandez-qxv4g6HH51o@public.gmane.org>, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
List-Id: devicetree@vger.kernel.org

On Wed, Jan 11, 2017 at 01:48:25PM +0100, Amelie Delaunay wrote:
> This patch adds support for the STM32 RTC.
> 
> Signed-off-by: Amelie Delaunay <amelie.delaunay-qxv4g6HH51o@public.gmane.org>
> ---
>  drivers/rtc/Kconfig     |  11 +
>  drivers/rtc/Makefile    |   1 +
>  drivers/rtc/rtc-stm32.c | 727 ++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 739 insertions(+)
>  create mode 100644 drivers/rtc/rtc-stm32.c

[...]
> +/* STM32_PWR_CR */
> +#define PWR_CR				0x00
> +/* STM32_PWR_CR bit field */
> +#define PWR_CR_DBP			BIT(8)
> +
> +static struct regmap *dbp;

Hello

Why using a global static struct ?
You could alloc a private structure in probe for storing it and use platform_set_drvdata()

Regards

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