On 12 July 2016 at 14:56, Bojan Prtvar <prtvar.b@xxxxxxxxx> wrote:
> Export DSR register through sysfs same as we did for the CID, CSD and OCR registers.
>
> Signed-off-by: Bojan Prtvar <prtvar.b@xxxxxxxxx>
> ---
> Documentation/mmc/mmc-dev-attrs.txt | 1 +
> drivers/mmc/core/mmc.c | 17 +++++++++++++++++
> 2 files changed, 18 insertions(+)
>
> diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt
> index 8163eca..404a0e9 100644
> --- a/Documentation/mmc/mmc-dev-attrs.txt
> +++ b/Documentation/mmc/mmc-dev-attrs.txt
> @@ -29,6 +29,7 @@ All attributes are read-only.
> raw_rpmb_size_mult RPMB partition size
> rel_sectors Reliable write sector count
> ocr Operation Conditions Register
> + dsr Driver Stage Register
>
> Note on Erase Size and Preferred Erase Size:
>
> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
> index 1848334..4363fdc 100644
> --- a/drivers/mmc/core/mmc.c
> +++ b/drivers/mmc/core/mmc.c
> @@ -745,6 +745,22 @@ static ssize_t mmc_fwrev_show(struct device *dev,
>
> static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
>
> +static ssize_t mmc_dsr_show(struct device *dev,
> + struct device_attribute *attr,
> + char *buf)
> +{
> + struct mmc_card *card = mmc_dev_to_card(dev);
> + struct mmc_host *host = card->host;
> +
> + if (card->csd.dsr_imp && host->dsr_req)
> + return sprintf(buf, "0x%x\n", host->dsr);
> + else
> + /* return default DSR value */
> + return sprintf(buf, "0x%x\n", 0x404);
> +}
> +
> +static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
> +
> static struct attribute *mmc_std_attrs[] = {
> &dev_attr_cid.attr,
> &dev_attr_csd.attr,
> @@ -764,6 +780,7 @@ static struct attribute *mmc_std_attrs[] = {
> &dev_attr_raw_rpmb_size_mult.attr,
> &dev_attr_rel_sectors.attr,
> &dev_attr_ocr.attr,
> + &dev_attr_dsr.attr,
> NULL,
> };
> ATTRIBUTE_GROUPS(mmc_std);
> --
> 2.8.0.GIT
>
Could you please extend this change to also cover SD cards. They also
have DSR registers.
Kind regards
Uffe
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