linux-kernel - [PATCH v2] mmc: Export card RCA register to sysfs.

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Date:   Wed, 7 Mar 2018 10:31:42 +0530
From:   Harish Jenny K N <harish_kandiga@...tor.com>
To:     <ulf.hansson@...aro.org>, <linus.walleij@...aro.org>,
        <adrian.hunter@...el.com>, <shawn.lin@...k-chips.com>
CC:     <linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <harish_kandiga@...tor.com>
Subject: [PATCH v2] mmc: Export card RCA register to sysfs.

This patch exports RCA register to sysfs which will help in
reading the disk identification information.

Reviewed-by: Shawn Lin <shawn.lin@...k-chips.com>
Signed-off-by: Harish Jenny K N <harish_kandiga@...tor.com>
---

Changes in v2:
- Used 0x%04x to display 16 bit register

 drivers/mmc/core/mmc.c | 2 ++
 drivers/mmc/core/sd.c  | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 208a762..6f8ebd6 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -792,6 +792,7 @@ static int mmc_compare_ext_csds(struct mmc_card *card, unsigned bus_width)
 MMC_DEV_ATTR(raw_rpmb_size_mult, "%#x\n", card->ext_csd.raw_rpmb_size_mult);
 MMC_DEV_ATTR(rel_sectors, "%#x\n", card->ext_csd.rel_sectors);
 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
+MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
 MMC_DEV_ATTR(cmdq_en, "%d\n", card->ext_csd.cmdq_en);

 static ssize_t mmc_fwrev_show(struct device *dev,
@@ -848,6 +849,7 @@ static ssize_t mmc_dsr_show(struct device *dev,
 	&dev_attr_raw_rpmb_size_mult.attr,
 	&dev_attr_rel_sectors.attr,
 	&dev_attr_ocr.attr,
+	&dev_attr_rca.attr,
 	&dev_attr_dsr.attr,
 	&dev_attr_cmdq_en.attr,
 	NULL,
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 62b84dd..2ecd098 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -676,6 +676,7 @@ static int mmc_sd_init_uhs_card(struct mmc_card *card)
 MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
 MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);
 MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
+MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);


 static ssize_t mmc_dsr_show(struct device *dev,
@@ -709,6 +710,7 @@ static ssize_t mmc_dsr_show(struct device *dev,
 	&dev_attr_oemid.attr,
 	&dev_attr_serial.attr,
 	&dev_attr_ocr.attr,
+	&dev_attr_rca.attr,
 	&dev_attr_dsr.attr,
 	NULL,
 };
--
1.9.1