summaryrefslogtreecommitdiffstats
path: root/drivers/mmc/core/host.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mmc/core/host.c')
-rw-r--r--drivers/mmc/core/host.c32
1 files changed, 28 insertions, 4 deletions
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 31969436d77c..03c53b72a2d6 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -311,6 +311,7 @@ int mmc_of_parse(struct mmc_host *host)
struct device_node *np;
u32 bus_width;
int len, ret;
+ bool cap_invert, gpio_invert;
if (!host->parent || !host->parent->of_node)
return 0;
@@ -359,12 +360,15 @@ int mmc_of_parse(struct mmc_host *host)
host->caps |= MMC_CAP_NONREMOVABLE;
} else {
if (of_property_read_bool(np, "cd-inverted"))
- host->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
+ cap_invert = true;
+ else
+ cap_invert = false;
if (of_find_property(np, "broken-cd", &len))
host->caps |= MMC_CAP_NEEDS_POLL;
- ret = mmc_gpiod_request_cd(host, "cd", 0, false, 0);
+ ret = mmc_gpiod_request_cd(host, "cd", 0, true,
+ 0, &gpio_invert);
if (ret) {
if (ret == -EPROBE_DEFER)
return ret;
@@ -375,13 +379,29 @@ int mmc_of_parse(struct mmc_host *host)
}
} else
dev_info(host->parent, "Got CD GPIO\n");
+
+ /*
+ * There are two ways to flag that the CD line is inverted:
+ * through the cd-inverted flag and by the GPIO line itself
+ * being inverted from the GPIO subsystem. This is a leftover
+ * from the times when the GPIO subsystem did not make it
+ * possible to flag a line as inverted.
+ *
+ * If the capability on the host AND the GPIO line are
+ * both inverted, the end result is that the CD line is
+ * not inverted.
+ */
+ if (cap_invert ^ gpio_invert)
+ host->caps2 |= MMC_CAP2_CD_ACTIVE_HIGH;
}
/* Parse Write Protection */
if (of_property_read_bool(np, "wp-inverted"))
- host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
+ cap_invert = true;
+ else
+ cap_invert = false;
- ret = mmc_gpiod_request_ro(host, "wp", 0, false, 0);
+ ret = mmc_gpiod_request_ro(host, "wp", 0, false, 0, &gpio_invert);
if (ret) {
if (ret == -EPROBE_DEFER)
goto out;
@@ -393,6 +413,10 @@ int mmc_of_parse(struct mmc_host *host)
} else
dev_info(host->parent, "Got WP GPIO\n");
+ /* See the comment on CD inversion above */
+ if (cap_invert ^ gpio_invert)
+ host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
+
if (of_find_property(np, "cap-sd-highspeed", &len))
host->caps |= MMC_CAP_SD_HIGHSPEED;
if (of_find_property(np, "cap-mmc-highspeed", &len))