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mmc: sdhci: Introduce sdhci_set_power_and_bus_voltage()

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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>
This commit is contained in:
Nicolas Saenz Julienne 2020-03-06 18:44:03 +01:00 committed by Ulf Hansson
parent 6bbcf74dd9
commit 6c92ae1e45
2 changed files with 22 additions and 0 deletions
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19
drivers/mmc/host/sdhci.c
View File

@ -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 *

3
drivers/mmc/host/sdhci.h
View File

@ -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);