diff options
Diffstat (limited to 'drivers/mmc/core/host.c')
| -rw-r--r-- | drivers/mmc/core/host.c | 32 |
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)) |