Alan,
Cannot find you patch for sdhci.c for reset -- can you send it to me.
The approach of having a reset call into the platform specific code is fine.
This is the way I implemented our code originally but .... this was not felt
when I did the code as the right direction to go in. What I did in my code was
call back into the driver reset and then reset the private registers. I felt
this gave me more control.
Philip
On Sep 24, 2010, at 10:26 AM, Alan Cox wrote:
> On Fri, 24 Sep 2010 09:42:15 -0700
> Philip Rakity <prak...@marvell.com> wrote:
>
>>> From 9d64df0fa6874371446147f67c071e78c587c0d6 Mon Sep 17 00:00:00 2001
>> From: Philip Rakity <prak...@marvell.com>
>> Date: Fri, 24 Sep 2010 05:27:11 -0700
>> Subject: [PATCH] sdhci: allow controller private registers to be changaed on
>> reset
>>
>> allow controllers that have private registers that are reset when
>> the controller is reset. They need to be reprogrammed back to their
>> values when the reset happens. Provide a hook to allow this to happen.
>>
>> Signed-off-by: Philip Rakity <prak...@marvell.com>
>> ---
>> drivers/mmc/host/sdhci.c | 3 +++
>> drivers/mmc/host/sdhci.h | 1 +
>> 2 files changed, 4 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
>> index 401527d..0774dad 100644
>> --- a/drivers/mmc/host/sdhci.c
>> +++ b/drivers/mmc/host/sdhci.c
>> @@ -174,6 +174,9 @@ static void sdhci_reset(struct sdhci_host *host, u8 mask)
>>
>> if (host->quirks & SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET)
>> sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK, ier);
>> +
>> + if (host->ops->platform_specific_reset)
>> + host->ops->platform_specific_reset(host, mask);
>> }
>>
>> static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios);
>> diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
>> index d316bc7..f68af47 100644
>> --- a/drivers/mmc/host/sdhci.h
>> +++ b/drivers/mmc/host/sdhci.h
>> @@ -323,6 +323,7 @@ struct sdhci_ops {
>> unsigned int (*get_max_clock)(struct sdhci_host *host);
>> unsigned int (*get_min_clock)(struct sdhci_host *host);
>> unsigned int (*get_timeout_clock)(struct sdhci_host *host);
>> + void (*platform_specific_reset)(struct sdhci_host *host, u8 mask);
>
> See the patches I posted earlier about reset. All of sdhci_reset could be
> cleaned up further by replacing sdhci_reset as a whole with a hookable
> interface, and the hook you propose isn't sufficient for the Intel
> devices, nor can it eliminate some of the other quirk flags.
>
> Alan
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