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mci: add device tree support for DSR 

add optional DSR support. This should go into the kernel, too

Signed-off-by: Markus Niebel <Markus.Niebel@tqs.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Markus Niebel 2014-01-14 09:23:35 +01:00 committed by Sascha Hauer
parent 78b9e4e041
commit f11668fee7
1 changed files with 8 additions and 0 deletions
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8
drivers/mci/mci-core.c
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@ -1775,6 +1775,7 @@ void mci_of_parse(struct mci_host *host)
{
struct device_node *np;
u32 bus_width;
u32 dsr_val;
if (!IS_ENABLED(CONFIG_OFDEVICE))
return;
@ -1807,4 +1808,11 @@ void mci_of_parse(struct mci_host *host)
/* f_max is obtained from the optional "max-frequency" property */
of_property_read_u32(np, "max-frequency", &host->f_max);
if (!of_property_read_u32(np, "dsr", &dsr_val)) {
if (dsr_val < 0x10000) {
host->use_dsr = 1;
host->dsr_val = dsr_val;
}
}
}