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Fetch the SDHCI frequency from videocore (our prefered source) and only if

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it fails, fetch the clock-frequency from DTB.

If both methods fail, use the hardcoded default.
This commit is contained in:
Luiz Otavio O Souza 2015-04-22 18:35:02 +00:00
parent cb1ecf6cca
commit b7fbc36963
1 changed files with 6 additions and 7 deletions
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13
sys/arm/broadcom/bcm2835/bcm2835_sdhci.c
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@ -181,17 +181,16 @@ bcm_sdhci_attach(device_t dev)
if (err == 0) {
/* Convert to MHz */
default_freq /= 1000000;
if (bootverbose)
device_printf(dev, "default frequency: %dMHz\n",
default_freq);
}
if (default_freq == 0) {
node = ofw_bus_get_node(sc->sc_dev);
if ((OF_getencprop(node, "clock-frequency", &cell,
sizeof(cell))) > 0)
default_freq = cell / 1000000;
}
if (default_freq == 0)
default_freq = BCM2835_DEFAULT_SDHCI_FREQ;
node = ofw_bus_get_node(sc->sc_dev);
if ((OF_getprop(node, "clock-frequency", &cell, sizeof(cell))) > 0)
default_freq = fdt32_to_cpu(cell)/1000000;
if (bootverbose)
device_printf(dev, "SDHCI frequency: %dMHz\n", default_freq);