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mmc_fdt_helpers: Parse the optional pwrseq element.

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If a sd/emmc node have a pwrseq property parse it and get the corresponding
driver.
This can later be used to powerup/powerdown the SDIO card or eMMC.

Sponsored by:	Diablotin Systems
Differential Revision:	https://reviews.freebsd.org/D30289
This commit is contained in:
Emmanuel Vadot 2021-05-16 14:50:10 +02:00
parent 5b2a81f58d
commit b0387990a7
2 changed files with 10 additions and 0 deletions
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8
sys/dev/mmc/mmc_fdt_helpers.c
View File

@ -100,6 +100,7 @@ mmc_fdt_parse(device_t dev, phandle_t node, struct mmc_fdt_helper *helper,
struct mmc_host *host)
{
uint32_t bus_width;
phandle_t pwrseq_xref;
if (node <= 0)
node = ofw_bus_get_node(dev);
@ -181,6 +182,13 @@ mmc_fdt_parse(device_t dev, phandle_t node, struct mmc_fdt_helper *helper,
host->caps |= MMC_CAP_SIGNALING_330;
#endif
if (OF_hasprop(node, "mmc-pwrseq")) {
if (OF_getencprop(node, "mmc-pwrseq", &pwrseq_xref, sizeof(pwrseq_xref)) == -1) {
device_printf(dev, "Cannot get the pwrseq_xref property\n");
return (ENXIO);
}
helper->mmc_pwrseq = OF_device_from_xref(pwrseq_xref);
}
return (0);
}

2
sys/dev/mmc/mmc_fdt_helpers.h
View File

@ -63,6 +63,8 @@ struct mmc_fdt_helper {
regulator_t vmmc_supply;
regulator_t vqmmc_supply;
#endif
device_t mmc_pwrseq;
};
typedef void (*mmc_fdt_cd_handler)(device_t dev, bool present);