linux-kernel - Re: [PATCH 02/14] mmc: mmci: Don't pretend all variants to have MCI

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Date:   Mon, 15 Jan 2018 13:32:14 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Patrice CHOTARD <patrice.chotard@...com>
Cc:     Russell King <linux@...linux.org.uk>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org,
        Andrea Merello <andrea.merello@...il.com>
Subject: Re: [PATCH 02/14] mmc: mmci: Don't pretend all variants to have
 MCI_STARBITERR flag

On 12 January 2018 at 13:15,  <patrice.chotard@...com> wrote:
> From: Patrice Chotard <patrice.chotard@...com>
>
> This patch prepares for supporting the STM32 variant that
> has no such bit in the status register.
>
> Signed-off-by: Andrea Merello <andrea.merello@...il.com>
> Signed-off-by: Patrice Chotard <patrice.chotard@...com>
> ---
>  drivers/mmc/host/mmci.c | 16 ++++++++++++++--
>  1 file changed, 14 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
> index 3125dc0..7e56f85 100644
> --- a/drivers/mmc/host/mmci.c
> +++ b/drivers/mmc/host/mmci.c
> @@ -83,6 +83,8 @@
>   * @qcom_dml: enables qcom specific dma glue for dma transfers.
>   * @reversed_irq_handling: handle data irq before cmd irq.
>   * @mmcimask1: true if variant have a MMCIMASK1 register.
> + * @start_err: true is the variant has STARTBITERR bit inside MMCISTATUS
> + *            register.
>   */
>  struct variant_data {
>         unsigned int            clkreg;
> @@ -113,6 +115,7 @@ struct variant_data {
>         bool                    qcom_dml;
>         bool                    reversed_irq_handling;
>         bool                    mmcimask1;
> +       bool                    start_err;

To be consistent with how we implement support for similar variant
variations, I would prefer to have this being a u32. Something along
the lines of how the "busy_detect_flag" is being used.

Otherwise this looks good to me.

[...]

Kind regards
Uffe