27.07.2020 15:47, Aniruddha Rao пишет: > Add runtime suspend/resume callbacks to save power > when the bus is not in use. > In runtime suspend > - Turn off the SDMMC host CAR clock. > - Turn off the trimmer/DLL circuit(BG) power supply(VREG). > - Turn off the SDMMC host internal clocks. > > Re-enable all the disabled clocks/regulators in runtime resume. > > Signed-off-by: Aniruddha Rao <anrao@xxxxxxxxxx> > --- > drivers/mmc/host/sdhci-tegra.c | 149 ++++++++++++++++++++++++++++++++++++++--- > 1 file changed, 140 insertions(+), 9 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c > index 0a3f9d0..1b4b245 100644 > --- a/drivers/mmc/host/sdhci-tegra.c > +++ b/drivers/mmc/host/sdhci-tegra.c > @@ -23,6 +23,7 @@ > #include <linux/mmc/slot-gpio.h> > #include <linux/gpio/consumer.h> > #include <linux/ktime.h> > +#include <linux/pm_runtime.h> > > #include "sdhci-pltfm.h" > #include "cqhci.h" > @@ -36,6 +37,7 @@ > #define SDHCI_CLOCK_CTRL_SDR50_TUNING_OVERRIDE BIT(5) > #define SDHCI_CLOCK_CTRL_PADPIPE_CLKEN_OVERRIDE BIT(3) > #define SDHCI_CLOCK_CTRL_SPI_MODE_CLKEN_OVERRIDE BIT(2) > +#define SDHCI_CLOCK_CTRL_SDMMC_CLK BIT(0) > > #define SDHCI_TEGRA_VENDOR_SYS_SW_CTRL 0x104 > #define SDHCI_TEGRA_SYS_SW_CTRL_ENHANCED_STROBE BIT(31) > @@ -51,6 +53,9 @@ > #define SDHCI_MISC_CTRL_ENABLE_SDHCI_SPEC_300 0x20 > #define SDHCI_MISC_CTRL_ENABLE_DDR50 0x200 > > +#define SDHCI_TEGRA_VENDOR_IO_TRIM_CTRL_0 0x1AC > +#define SDHCI_TEGRA_IO_TRIM_CTRL_0_SEL_VREG_MASK 0x4 Hello Aniruddha, Does this register exist on older Tegra SoCs?
