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mmc: core: Extend sysfs with DSR register 

Export DSR register through sysfs same as we did for the CID, CSD and
OCR registers.

Signed-off-by: Bojan Prtvar <prtvar.b@gmail.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
steinar/wifi_calib_4_9_kernel
Bojan Prtvar 2016-07-19 11:16:38 +02:00 committed by Ulf Hansson
parent 2c4c7146c7
commit 6825a60658
3 changed files with 35 additions and 0 deletions
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1
Documentation/mmc/mmc-dev-attrs.txt
View File

@ -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:

17
drivers/mmc/core/mmc.c
View File

@ -767,6 +767,22 @@ 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,
@ -786,6 +802,7 @@ 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);

17
drivers/mmc/core/sd.c
View File

@ -678,6 +678,22 @@ MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
MMC_DEV_ATTR(ocr, "%08x\n", card->ocr);
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 *sd_std_attrs[] = {
&dev_attr_cid.attr,
&dev_attr_csd.attr,
@ -692,6 +708,7 @@ static struct attribute *sd_std_attrs[] = {
&dev_attr_oemid.attr,
&dev_attr_serial.attr,
&dev_attr_ocr.attr,
&dev_attr_dsr.attr,
NULL,
};
ATTRIBUTE_GROUPS(sd_std);