linux-kernel - Re: [RFC PATCH 1/3] mmc: sdhci: Add platform_dumpregs callback support to sdhci

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Date:   Sun, 15 Jan 2017 21:21:18 -0800
From:   Jeremy McNicoll <jmcnicol@...hat.com>
To:     Ritesh Harjani <riteshh@...eaurora.org>
Cc:     ulf.hansson@...aro.org, adrian.hunter@...el.com,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        shawn.lin@...k-chips.com, stummala@...eaurora.org,
        georgi.djakov@...aro.org, linux-arm-msm@...r.kernel.org,
        pramod.gurav@...aro.org, jeremymc@...hat.com,
        venkatg@...eaurora.org, asutoshd@...eaurora.org,
        subhashj@...eaurora.org
Subject: Re: [RFC PATCH 1/3] mmc: sdhci: Add platform_dumpregs callback
 support to sdhci_ops.

On Mon, Jan 16, 2017 at 07:45:48AM +0530, Ritesh Harjani wrote:
> Hi Jeremy,
> 
> Thanks for the review.
> 
> On 1/14/2017 3:51 AM, Jeremy McNicoll wrote:
> >On Fri, Dec 30, 2016 at 05:02:09PM +0530, Ritesh Harjani wrote:
> >>From: Sahitya Tummala <stummala@...eaurora.org>
> >>
> >>Add new host operation ->platform_dumpregs to provide a
> >>mechanism through which host drivers can dump platform
> >>specific registers in addition to SDHC registers
> >>during error conditions.
> >>
> >>Signed-off-by: Sahitya Tummala <stummala@...eaurora.org>
> >>Signed-off-by: Ritesh Harjani <riteshh@...eaurora.org>
> >>---
> >> drivers/mmc/host/sdhci.c | 3 +++
> >> drivers/mmc/host/sdhci.h | 1 +
> >> 2 files changed, 4 insertions(+)
> >>
> >
> >This change and 2/3 look like they can be squished together into
> >one patch.  At least that is how I did it,
> 
> I felt it is better this way to keep sdhci and sdhci-msm patches separate.
> This patch provides mechanism and patch 3/3 provides
> implementation of ->platform_dumpregs in sdhci-msm.
>

Alright, lets go with that approach.  

-jeremy

> Regards
> Ritesh
> 
> 
> >
> >https://patchwork.kernel.org/patch/9442449/
> >
> >-jeremy
> >
> >
> >>diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> >>index 2390980..73a8918 100644
> >>--- a/drivers/mmc/host/sdhci.c
> >>+++ b/drivers/mmc/host/sdhci.c
> >>@@ -101,6 +101,9 @@ static void sdhci_dumpregs(struct sdhci_host *host)
> >> 			       readl(host->ioaddr + SDHCI_ADMA_ADDRESS));
> >> 	}
> >>
> >>+	if (host->ops->platform_dumpregs)
> >>+		host->ops->platform_dumpregs(host);
> >>+
> >> 	pr_err(DRIVER_NAME ": ===========================================\n");
> >> }
> >>
> >>diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
> >>index 0b66f21..400f3a1 100644
> >>--- a/drivers/mmc/host/sdhci.h
> >>+++ b/drivers/mmc/host/sdhci.h
> >>@@ -564,6 +564,7 @@ struct sdhci_ops {
> >> 					 struct mmc_card *card,
> >> 					 unsigned int max_dtr, int host_drv,
> >> 					 int card_drv, int *drv_type);
> >>+	void	(*platform_dumpregs)(struct sdhci_host *host);
> >> };
> >>
> >> #ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
> >>--
> >>The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
> >>a Linux Foundation Collaborative Project.
> >>
> 
> -- 
> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
> a Linux Foundation Collaborative Project