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aw_mmc: Get max-frequency from the dtb

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If a max-frequency is supplied in the dtb use it, otherwise fallback to a
default one of 52Mhz.
This commit is contained in:
manu 2018-05-31 15:41:56 +00:00
parent 1750bced58
commit a96913d456
1 changed files with 7 additions and 2 deletions
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9
sys/arm/allwinner/aw_mmc.c
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@ -182,7 +182,7 @@ aw_mmc_attach(device_t dev)
struct aw_mmc_softc *sc;
struct sysctl_ctx_list *ctx;
struct sysctl_oid_list *tree;
uint32_t bus_width;
uint32_t bus_width, max_freq;
phandle_t node;
int error;
@ -277,7 +277,12 @@ aw_mmc_attach(device_t dev)
}
sc->aw_host.f_min = 400000;
sc->aw_host.f_max = 52000000;
if (OF_getencprop(node, "max-frequency", &max_freq,
sizeof(uint32_t)) <= 0)
max_freq = 52000000;
sc->aw_host.f_max = max_freq;
sc->aw_host.host_ocr = MMC_OCR_320_330 | MMC_OCR_330_340;
sc->aw_host.caps = MMC_CAP_HSPEED | MMC_CAP_UHS_SDR12 |
MMC_CAP_UHS_SDR25 | MMC_CAP_UHS_SDR50 |