[PATCH 1/5] mci: mci-core: respect disable-wp property

[Michael Tretter]

Systems without write-protect pin should ignore the write protect logic
and assume that an SD card is always read-write. This is expressed by
the disable-wp dt property.

Respect the disable-wp property and don't call the write protection
check in these cases.

Signed-off-by: Michael Tretter <m.tretter at pengutronix.de>
---
 drivers/mci/mci-core.c | 4 +++-
 include/mci.h          | 1 +
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index a160b9889459..a094f3cbf522 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -1358,7 +1358,8 @@ static int __maybe_unused mci_sd_write(struct block_device *blk,
 
 	mci_blk_part_switch(part);
 
-	if (host->card_write_protected && host->card_write_protected(host)) {
+	if (!host->disable_wp &&
+	    host->card_write_protected && host->card_write_protected(host)) {
 		dev_err(&mci->dev, "card write protected\n");
 		return -EPERM;
 	}
@@ -2016,6 +2017,7 @@ void mci_of_parse_node(struct mci_host *host,
 
 	host->non_removable = of_property_read_bool(np, "non-removable");
 	host->no_sd = of_property_read_bool(np, "no-sd");
+	host->disable_wp = of_property_read_bool(np, "disable-wp");
 }
 
 void mci_of_parse(struct mci_host *host)
diff --git a/include/mci.h b/include/mci.h
index df2437f6181b..922aeaecf3de 100644
--- a/include/mci.h
+++ b/include/mci.h
@@ -406,6 +406,7 @@ struct mci_host {
 	int use_dsr;		/**< optional dsr usage flag */
 	bool non_removable;	/**< device is non removable */
 	bool no_sd;		/**< do not send SD commands during initialization */
+	bool disable_wp;	/**< ignore write-protect detection logic */
 	struct regulator *supply;
 
 	/** init the host interface */
-- 
2.29.2