diff options
-rw-r--r-- | drivers/mmc/core/host.c | 32 | ||||
-rw-r--r-- | drivers/mmc/core/slot-gpio.c | 14 | ||||
-rw-r--r-- | drivers/mmc/host/mmci.c | 4 | ||||
-rw-r--r-- | drivers/mmc/host/sdhci-acpi.c | 2 | ||||
-rw-r--r-- | include/linux/mmc/slot-gpio.h | 4 |
5 files changed, 45 insertions, 11 deletions
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 3196943..03c53b7 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)) diff --git a/drivers/mmc/core/slot-gpio.c b/drivers/mmc/core/slot-gpio.c index 38f7655..69bbf2a 100644 --- a/drivers/mmc/core/slot-gpio.c +++ b/drivers/mmc/core/slot-gpio.c @@ -281,6 +281,8 @@ EXPORT_SYMBOL(mmc_gpio_free_cd); * @idx: index of the GPIO to obtain in the consumer * @override_active_level: ignore %GPIO_ACTIVE_LOW flag * @debounce: debounce time in microseconds + * @gpio_invert: will return whether the GPIO line is inverted or not, set + * to NULL to ignore * * Use this function in place of mmc_gpio_request_cd() to use the GPIO * descriptor API. Note that it is paired with mmc_gpiod_free_cd() not @@ -291,7 +293,7 @@ EXPORT_SYMBOL(mmc_gpio_free_cd); */ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id, unsigned int idx, bool override_active_level, - unsigned int debounce) + unsigned int debounce, bool *gpio_invert) { struct mmc_gpio *ctx; struct gpio_desc *desc; @@ -316,6 +318,9 @@ int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id, return ret; } + if (gpio_invert) + *gpio_invert = !gpiod_is_active_low(desc); + ctx->override_cd_active_level = override_active_level; ctx->cd_gpio = desc; @@ -330,6 +335,8 @@ EXPORT_SYMBOL(mmc_gpiod_request_cd); * @idx: index of the GPIO to obtain in the consumer * @override_active_level: ignore %GPIO_ACTIVE_LOW flag * @debounce: debounce time in microseconds + * @gpio_invert: will return whether the GPIO line is inverted or not, + * set to NULL to ignore * * Use this function in place of mmc_gpio_request_ro() to use the GPIO * descriptor API. Note that it is paired with mmc_gpiod_free_ro() not @@ -339,7 +346,7 @@ EXPORT_SYMBOL(mmc_gpiod_request_cd); */ int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id, unsigned int idx, bool override_active_level, - unsigned int debounce) + unsigned int debounce, bool *gpio_invert) { struct mmc_gpio *ctx; struct gpio_desc *desc; @@ -364,6 +371,9 @@ int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id, return ret; } + if (gpio_invert) + *gpio_invert = !gpiod_is_active_low(desc); + ctx->override_ro_active_level = override_active_level; ctx->ro_gpio = desc; diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index c9dafed..43af791 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -1682,7 +1682,7 @@ static int mmci_probe(struct amba_device *dev, * silently of these do not exist and proceed to try platform data */ if (!np) { - ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0); + ret = mmc_gpiod_request_cd(mmc, "cd", 0, false, 0, NULL); if (ret < 0) { if (ret == -EPROBE_DEFER) goto clk_disable; @@ -1693,7 +1693,7 @@ static int mmci_probe(struct amba_device *dev, } } - ret = mmc_gpiod_request_ro(mmc, "wp", 0, false, 0); + ret = mmc_gpiod_request_ro(mmc, "wp", 0, false, 0, NULL); if (ret < 0) { if (ret == -EPROBE_DEFER) goto clk_disable; diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c index 3483c08..327bc24 100644 --- a/drivers/mmc/host/sdhci-acpi.c +++ b/drivers/mmc/host/sdhci-acpi.c @@ -352,7 +352,7 @@ static int sdhci_acpi_probe(struct platform_device *pdev) if (sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD)) { bool v = sdhci_acpi_flag(c, SDHCI_ACPI_SD_CD_OVERRIDE_LEVEL); - if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0)) { + if (mmc_gpiod_request_cd(host->mmc, NULL, 0, v, 0, NULL)) { dev_warn(dev, "failed to setup card detect gpio\n"); c->use_runtime_pm = false; } diff --git a/include/linux/mmc/slot-gpio.h b/include/linux/mmc/slot-gpio.h index a0d0442..e56fa24 100644 --- a/include/linux/mmc/slot-gpio.h +++ b/include/linux/mmc/slot-gpio.h @@ -24,10 +24,10 @@ void mmc_gpio_free_cd(struct mmc_host *host); int mmc_gpiod_request_cd(struct mmc_host *host, const char *con_id, unsigned int idx, bool override_active_level, - unsigned int debounce); + unsigned int debounce, bool *gpio_invert); int mmc_gpiod_request_ro(struct mmc_host *host, const char *con_id, unsigned int idx, bool override_active_level, - unsigned int debounce); + unsigned int debounce, bool *gpio_invert); void mmc_gpiod_free_cd(struct mmc_host *host); void mmc_gpiod_request_cd_irq(struct mmc_host *host); |