linux-kernel - Re: [PATCH v1 1/2] mmc: cqhci: add new cqhci_host_ops pre_enable() and post

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Date:   Mon, 31 Aug 2020 16:07:43 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Chun-Hung Wu <chun-hung.wu@...iatek.com>, mirq-linux@...e.qmqm.pl,
        Jonathan Hunter <jonathanh@...dia.com>,
        Al Cooper <alcooperx@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Michal Simek <michal.simek@...inx.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Chaotian Jing <chaotian.jing@...iatek.com>,
        Mao Yong <yong.mao@...iatek.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Pavel Machek <pavel@....cz>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Pan Bian <bianpan2016@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Allison Randal <allison@...utok.net>,
        Mathieu Malaterre <malat@...ian.org>,
        Asutosh Das <asutoshd@...eaurora.org>,
        Ritesh Harjani <riteshh@...eaurora.org>,
        Stanley Chu <stanley.chu@...iatek.com>,
        Kuohong Wang <kuohong.wang@...iatek.com>
Cc:     kernel-team@...roid.com, linux-kernel@...r.kernel.org,
        linux-mmc@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        devicetree@...r.kernel.org, wsd_upstream@...iatek.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: Re: [PATCH v1 1/2] mmc: cqhci: add new cqhci_host_ops pre_enable()
 and post_disable()

On 27/08/20 12:33 pm, Chun-Hung Wu wrote:
> Add pre_enable() and post_disable() for cqhci_host_ops.
> Add hook functions before cqhci enable and
> after cqhci disable for platforms need them.
> 
> Signed-off-by: Chun-Hung Wu <chun-hung.wu@...iatek.com>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
>  drivers/mmc/host/cqhci.c |    6 ++++++
>  drivers/mmc/host/cqhci.h |    2 ++
>  2 files changed, 8 insertions(+)
> 
> diff --git a/drivers/mmc/host/cqhci.c b/drivers/mmc/host/cqhci.c
> index cfa87df..697fe40 100644
> --- a/drivers/mmc/host/cqhci.c
> +++ b/drivers/mmc/host/cqhci.c
> @@ -376,6 +376,9 @@ static void cqhci_off(struct mmc_host *mmc)
>  	else
>  		pr_debug("%s: cqhci: CQE off\n", mmc_hostname(mmc));
>  
> +	if (cq_host->ops->post_disable)
> +		cq_host->ops->post_disable(mmc);
> +
>  	mmc->cqe_on = false;
>  }
>  
> @@ -580,6 +583,9 @@ static int cqhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
>  		__cqhci_enable(cq_host);
>  
>  	if (!mmc->cqe_on) {
> +		if (cq_host->ops->pre_enable)
> +			cq_host->ops->pre_enable(mmc);
> +
>  		cqhci_writel(cq_host, 0, CQHCI_CTL);
>  		mmc->cqe_on = true;
>  		pr_debug("%s: cqhci: CQE on\n", mmc_hostname(mmc));
> diff --git a/drivers/mmc/host/cqhci.h b/drivers/mmc/host/cqhci.h
> index 4377001..89bf6ad 100644
> --- a/drivers/mmc/host/cqhci.h
> +++ b/drivers/mmc/host/cqhci.h
> @@ -206,6 +206,8 @@ struct cqhci_host_ops {
>  	void (*disable)(struct mmc_host *mmc, bool recovery);
>  	void (*update_dcmd_desc)(struct mmc_host *mmc, struct mmc_request *mrq,
>  				 u64 *data);
> +	void (*pre_enable)(struct mmc_host *mmc);
> +	void (*post_disable)(struct mmc_host *mmc);
>  };
>  
>  static inline void cqhci_writel(struct cqhci_host *host, u32 val, int reg)
>