Hi Adrian,
On mar., juin 14 2016, Adrian Hunter <adrian.hunter@xxxxxxxxx> wrote:
> On 09/06/16 10:10, Gregory CLEMENT wrote:
>> From: Victor Gu <xigu@xxxxxxxxxxx>
>>
>> This path adds the driver for the Marvell Xenon eMMC host controller
>> which supports eMMC 5.1, SD 3.0.
>>
>> However this driver supports only up to eMMC 5.0 since the command queue
>> feature is not included (yet) in the driver.
>>
>> [gregory.clement@xxxxxxxxxxxxxxxxxx:
>> - reformulate commit log
>> - overload the sdhci_set_uhs_signaling function instead of using a quirk
>> - fix a kconfig dependency
>> - remove dead code]
>>
>> Signed-off-by: Victor Gu <xigu@xxxxxxxxxxx>
>> Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
>> ---
>> drivers/mmc/host/Kconfig | 10 +
>> drivers/mmc/host/Makefile | 1 +
>> drivers/mmc/host/sdhci-xenon.c | 1164 ++++++++++++++++++++++++++++++++++++++++
>> 3 files changed, 1175 insertions(+)
>> create mode 100644 drivers/mmc/host/sdhci-xenon.c
>>
>
> <SNIP>
>
>> diff --git a/drivers/mmc/host/sdhci-xenon.c b/drivers/mmc/host/sdhci-xenon.c
>> new file mode 100644
>> index 000000000000..43c06db95872
>> --- /dev/null
>> +++ b/drivers/mmc/host/sdhci-xenon.c
>
> <SNIP>
>
>> +static int sdhci_xenon_delay_adj_test(struct sdhci_host *host,
>> + struct mmc_card *card, unsigned int delay,
>> + bool invert, bool phase)
>> +{
>> + int ret;
>> + struct mmc_card *oldcard;
>> +
>> + sdhci_xenon_set_fix_delay(host, delay, invert, phase);
>> +
>> + /*
>> + * If the card is not yet associated to the host, we
>> + * temporally do it
>> + */
>> + oldcard = card->host->card;
>> + if (!oldcard)
>> + card->host->card = card;
>> + ret = card_alive(card);
>
> This looks like an abuse of bus_ops->alive(). You will need to get
> agreement with Ulf how to handle this. I will wait for Ulf's comments
> before reviewing this patch set further.
Actually I modified this part of the driver to use
bus_ops->alive(). Initially, the alive() code was more or less copied
and paste from the mmc core with ugly include from mmc_ops.h and
sdio_ops.h to make it work. I find it cleaner to directly access the
alive() function.
Could you explain why it is an abuse of bus_ops->alive()?
Thanks,
Gregory
>> + card->host->card = oldcard;
>> + if (ret) {
>> + pr_debug("Xenon failed when sampling fix delay %d, inverted %d, phase %d\n",
>> + delay, invert, phase);
>> + return -EIO;
>> + }
>> +
>> + pr_debug("Xenon succeeded when sampling fixed delay %d, inverted %d, phase %d\n",
>> + delay, invert, phase);
>> + return 0;
>> +}
>
>
--
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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