From 6c92ae1e452ff3f4648b1450c9a3233a2ca53feb Mon Sep 17 00:00:00 2001 From: Nicolas Saenz Julienne Date: Fri, 6 Mar 2020 18:44:03 +0100 Subject: 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 Acked-by: Adrian Hunter Link: https://lore.kernel.org/r/20200306174413.20634-2-nsaenzjulienne@suse.de Signed-off-by: Ulf Hansson --- drivers/mmc/host/sdhci.c | 19 +++++++++++++++++++ drivers/mmc/host/sdhci.h | 3 +++ 2 files changed, 22 insertions(+) (limited to 'drivers/mmc') 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); -- cgit v1.2.3