linux-kernel - Re: [PATCH] mfd: bd9571mwv: add volatile register to make DVFS work

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Message-ID: <20181109110413.GC1031@kunai>
Date:   Fri, 9 Nov 2018 12:04:14 +0100
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc:     linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Marek Vasut <marek.vasut@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Dien Pham <dien.pham.ry@...esas.com>
Subject: Re: [PATCH] mfd: bd9571mwv: add volatile register to make DVFS work

On Wed, Oct 03, 2018 at 03:58:41PM +0200, Wolfram Sang wrote:
> From: Dien Pham <dien.pham.ry@...esas.com>
> 
> Because BD9571MWV_DVFS_MONIVDAC is not defined in the volatile table,
> the physical register value is not updated by regmap and DVFS doesn't
> work as expected. Fix it!
> 
> Signed-off-by: Dien Pham <dien.pham.ry@...esas.com>
> [wsa: rebase, add 'Fixes', reword commit message]
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Fixes: d3ea21272094 ("mfd: Add ROHM BD9571MWV-M MFD PMIC driver")
> ---

Any blockers for this one?

> 
> Grabbed from the BSP and confirmed by the datasheet. The register is RO
> and reflecting states depending on other registers.
> 
>  drivers/mfd/bd9571mwv.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mfd/bd9571mwv.c b/drivers/mfd/bd9571mwv.c
> index 503979c81dae..fab3cdc27ed6 100644
> --- a/drivers/mfd/bd9571mwv.c
> +++ b/drivers/mfd/bd9571mwv.c
> @@ -59,6 +59,7 @@ static const struct regmap_access_table bd9571mwv_writable_table = {
>  };
>  
>  static const struct regmap_range bd9571mwv_volatile_yes_ranges[] = {
> +	regmap_reg_range(BD9571MWV_DVFS_MONIVDAC, BD9571MWV_DVFS_MONIVDAC),
>  	regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
>  	regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INT),
>  	regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTREQ),
> -- 
> 2.19.0
> 

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