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@xxxxxxxxxxxxxx>
---
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
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