diff options
| author | Nicolas Saenz Julienne <nsaenzjulienne@suse.de> | 2020-03-06 20:44:03 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-03-24 16:39:53 +0300 |
| commit | 6c92ae1e452ff3f4648b1450c9a3233a2ca53feb (patch) | |
| tree | 028567bdc5f60c53997d72d2cdfdd12121eff60f /drivers/mmc | |
| parent | 6bbcf74dd929d0b7d8588ffdd38803bb455873f1 (diff) | |
| download | linux-6c92ae1e452ff3f4648b1450c9a3233a2ca53feb.tar.xz | |
mmc: sdhci: Introduce sdhci_set_power_and_bus_voltage()
Some controllers diverge from the standard way of setting power and need
their bus voltage register to be configured regardless of the whether
they use regulators. As this is a common pattern across sdhci hosts,
create a helper function.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20200306174413.20634-2-nsaenzjulienne@suse.de
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 19 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci.h | 3 |
2 files changed, 22 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index c59566363a42..525e0c971c6a 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -2010,6 +2010,25 @@ void sdhci_set_power(struct sdhci_host *host, unsigned char mode, } EXPORT_SYMBOL_GPL(sdhci_set_power); +/* + * Some controllers need to configure a valid bus voltage on their power + * register regardless of whether an external regulator is taking care of power + * supply. This helper function takes care of it if set as the controller's + * sdhci_ops.set_power callback. + */ +void sdhci_set_power_and_bus_voltage(struct sdhci_host *host, + unsigned char mode, + unsigned short vdd) +{ + if (!IS_ERR(host->mmc->supply.vmmc)) { + struct mmc_host *mmc = host->mmc; + + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, vdd); + } + sdhci_set_power_noreg(host, mode, vdd); +} +EXPORT_SYMBOL_GPL(sdhci_set_power_and_bus_voltage); + /*****************************************************************************\ * * * MMC callbacks * diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 249635692112..851b81565f46 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -772,6 +772,9 @@ void sdhci_set_clock(struct sdhci_host *host, unsigned int clock); void sdhci_enable_clk(struct sdhci_host *host, u16 clk); void sdhci_set_power(struct sdhci_host *host, unsigned char mode, unsigned short vdd); +void sdhci_set_power_and_bus_voltage(struct sdhci_host *host, + unsigned char mode, + unsigned short vdd); void sdhci_set_power_noreg(struct sdhci_host *host, unsigned char mode, unsigned short vdd); void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq); |