linux-kernel - Re: [PATCH v2 2/9] mtd: rawnand: brcmnand: Allow SoC to provide I/O operations

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Date:   Fri, 7 Jan 2022 08:22:41 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     linux-mtd@...ts.infradead.org,
        Rafał Miłecki <zajec5@...il.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Brian Norris <computersforpeace@...il.com>,
        Kamal Dasu <kdasu.kdev@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Cai Huoqing <caihuoqing@...du.com>,
        Colin Ian King <colin.king@...el.com>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:BROADCOM SPECIFIC AMBA DRIVER (BCMA)" 
        <linux-wireless@...r.kernel.org>,
        "open list:BROADCOM STB NAND FLASH DRIVER" 
        <bcm-kernel-feedback-list@...adcom.com>
Subject: Re: [PATCH v2 2/9] mtd: rawnand: brcmnand: Allow SoC to provide I/O
 operations

Hi Florian,

f.fainelli@...il.com wrote on Thu, 6 Jan 2022 19:10:12 -0800:

> On 1/6/2022 4:13 PM, Florian Fainelli wrote:
> > Allow a brcmnand_soc instance to provide a custom set of I/O operations
> > which we will require when using this driver on a BCMA bus which is not
> > directly memory mapped I/O. Update the nand_{read,write}_reg accordingly
> > to use the SoC operations if provided.
> > 
> > To minimize the penalty on other SoCs which do support standard MMIO
> > accesses, we use a static key which is disabled by default and gets
> > enabled if a soc implementation does provide I/O operations.
> > 
> > Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
> > ---  
> 
> [snip]
> 
> >   	init_completion(&ctrl->done);
> >   	init_completion(&ctrl->dma_done);
> >   	init_completion(&ctrl->edu_done);
> > @@ -3145,6 +3169,8 @@ int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
> >   		/* Enable interrupt */
> >   		ctrl->soc->ctlrdy_ack(ctrl->soc);
> >   		ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true);
> > +		if (brcmnand_soc_has_ops(soc))
> > +			static_branch_enable(&brcmnand_soc_has_ops_key);  
> 
> This hunk got mistakenly added with a rebase, I will wait for additional comments before spinning a new version.

FYI the series LGTM otherwise.

Thanks,
Miquèl