linux-kernel - Re: [PATCH v6 4/6] mfd: stm32: enable regmap fast

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Date:   Wed, 1 Apr 2020 10:52:20 +0200
From:   Fabrice Gasnier <fabrice.gasnier@...com>
To:     Benjamin Gaignard <benjamin.gaignard@...com>,
        <lee.jones@...aro.org>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <mcoquelin.stm32@...il.com>,
        <alexandre.torgue@...com>, <daniel.lezcano@...aro.org>,
        <tglx@...utronix.de>
CC:     <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 4/6] mfd: stm32: enable regmap fast_io for
 stm32-lptimer

On 4/1/20 10:39 AM, Benjamin Gaignard wrote:
> Because stm32-lptimer need to write in registers in interrupt context
> enable regmap fast_io to use a spin_lock to protect registers access
> rather than a mutex.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...com>
> ---
>  drivers/mfd/stm32-lptimer.c | 1 +
>  1 file changed, 1 insertion(+)
Hi Benjamin,

Acked-by: Fabrice Gasnier <fabrice.gasnier@...com>

Thanks,
Fabrice
> 
> diff --git a/drivers/mfd/stm32-lptimer.c b/drivers/mfd/stm32-lptimer.c
> index a00f99f36559..746e51a17cc8 100644
> --- a/drivers/mfd/stm32-lptimer.c
> +++ b/drivers/mfd/stm32-lptimer.c
> @@ -17,6 +17,7 @@ static const struct regmap_config stm32_lptimer_regmap_cfg = {
>  	.val_bits = 32,
>  	.reg_stride = sizeof(u32),
>  	.max_register = STM32_LPTIM_MAX_REGISTER,
> +	.fast_io = true,
>  };
>  
>  static int stm32_lptimer_detect_encoder(struct stm32_lptimer *ddata)
>