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Enhance support of extres in dwmmc driver.

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Handle all clocks, regulators and resets defined by dwmmc bindings.

MFC after:	2 weeks
This commit is contained in:
Michal Meloun 2019-08-18 08:54:10 +00:00
parent 7f8c4c78f5
commit e088e853c3
2 changed files with 60 additions and 5 deletions
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60
sys/dev/mmc/host/dwmmc.c
View File

@ -454,8 +454,45 @@ parse_fdt(struct dwmmc_softc *sc)
}
#ifdef EXT_RESOURCES
/* IP block reset is optional */
error = hwreset_get_by_ofw_name(sc->dev, 0, "reset", &sc->hwreset);
if (error != 0 && error != ENOENT) {
device_printf(sc->dev, "Cannot get reset\n");
goto fail;
}
/* vmmc regulator is optional */
error = regulator_get_by_ofw_property(sc->dev, 0, "vmmc-supply",
&sc->vmmc);
if (error != 0 && error != ENOENT) {
device_printf(sc->dev, "Cannot get regulator 'vmmc-supply'\n");
goto fail;
}
/* vqmmc regulator is optional */
error = regulator_get_by_ofw_property(sc->dev, 0, "vqmmc-supply",
&sc->vqmmc);
if (error != 0 && error != ENOENT) {
device_printf(sc->dev, "Cannot get regulator 'vqmmc-supply'\n");
goto fail;
}
/* Assert reset first */
if (sc->hwreset != NULL) {
error = hwreset_assert(sc->hwreset);
if (error != 0) {
device_printf(sc->dev, "Cannot assert reset\n");
goto fail;
}
}
/* BIU (Bus Interface Unit clock) is optional */
error = clk_get_by_ofw_name(sc->dev, 0, "biu", &sc->biu);
if (error != 0 && error != ENOENT) {
device_printf(sc->dev, "Cannot get 'biu' clock\n");
goto fail;
}
if (sc->biu) {
error = clk_enable(sc->biu);
if (error != 0) {
@ -469,20 +506,33 @@ parse_fdt(struct dwmmc_softc *sc)
* if no clock-frequency property is given
*/
error = clk_get_by_ofw_name(sc->dev, 0, "ciu", &sc->ciu);
if (error != 0 && error != ENOENT) {
device_printf(sc->dev, "Cannot get 'ciu'clock\n");
goto fail;
}
if (sc->ciu) {
error = clk_enable(sc->ciu);
if (error != 0) {
device_printf(sc->dev, "cannot enable ciu clock\n");
goto fail;
}
if (bus_hz != 0) {
error = clk_set_freq(sc->ciu, bus_hz, 0);
if (error != 0)
device_printf(sc->dev,
"cannot set ciu clock to %u\n", bus_hz);
}
error = clk_enable(sc->ciu);
if (error != 0) {
device_printf(sc->dev, "cannot enable ciu clock\n");
goto fail;
}
clk_get_freq(sc->ciu, &sc->bus_hz);
}
/* Take dwmmc out of reset */
if (sc->hwreset != NULL) {
error = hwreset_deassert(sc->hwreset);
if (error != 0) {
device_printf(sc->dev, "Cannot deassert reset\n");
goto fail;
}
}
#endif /* EXT_RESOURCES */
if (sc->bus_hz == 0) {

5
sys/dev/mmc/host/dwmmc_var.h
View File

@ -35,6 +35,8 @@
#ifdef EXT_RESOURCES
#include <dev/extres/clk/clk.h>
#include <dev/extres/hwreset/hwreset.h>
#include <dev/extres/regulator/regulator.h>
#endif
enum {
@ -83,6 +85,9 @@ struct dwmmc_softc {
#ifdef EXT_RESOURCES
clk_t biu;
clk_t ciu;
hwreset_t hwreset;
regulator_t vmmc;
regulator_t vqmmc;
#endif
};