linux-kernel - RE: [PATCH v4 2/2] mmc: Add mmc driver for Sunplus SP7021

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Message-ID: <c6ecbe40dc234454b41bcbc0bf073084@sphcmbx02.sunplus.com.tw>
Date:   Mon, 21 Mar 2022 04:55:11 +0000
From:   Tony Huang 黃懷厚 <tony.huang@...plus.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Tony Huang <tonyhuang.sunplus@...il.com>,
        "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "lhjeff911@...il.com" <lhjeff911@...il.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>
CC:     Wells Lu 呂芳騰 <wells.lu@...plus.com>,
        Lh Kuo 郭力豪 <lh.Kuo@...plus.com>
Subject: RE: [PATCH v4 2/2] mmc: Add mmc driver for Sunplus SP7021

Dear Krzysztof:
> 
> > +	int dma_int_threshold;
> > +	struct sg_mapping_iter sg_miter; /* for pio mode to access sglist */
> > +	int dma_use_int; /* should raise irq when dma done */
> > +	struct spmmc_tuning_info emmc_tuning_info;
> > +	struct spsdc_tuning_info sd_tuning_info;
> > +	int restore_4bit_sdio_bus;
> > +	const struct spmmc_compatible *dev_comp; };
> > +
> > +struct spsdc_host {
> 
> Where is this used?
> 

struct spmmc_host{} for emmc.			
struct spsdc_host{} for SD card.			
The register base address and offset address of emmc and sd cards are different.			
eMMC and sdcard are their respective hardware settings.