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mmc: zynq: Add OF initialization support

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Enable initialize sdhci from DTB.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2014-02-24 11:16:31 +01:00 committed by Tom Rini
parent f88a6869a1
commit 345d3c0f01
2 changed files with 30 additions and 0 deletions
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1
arch/arm/include/asm/arch-zynq/sys_proto.h
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@ -19,5 +19,6 @@ extern void zynq_ddrc_init(void);
/* Driver extern functions */
extern int zynq_sdhci_init(u32 regbase);
extern int zynq_sdhci_of_init(const void *blob);
#endif /* _SYS_PROTO_H_ */

29
drivers/mmc/zynq_sdhci.c
View file

@ -7,6 +7,8 @@
*/
#include <common.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <malloc.h>
#include <sdhci.h>
#include <asm/arch/sys_proto.h>
@ -32,3 +34,30 @@ int zynq_sdhci_init(u32 regbase)
add_sdhci(host, 52000000, 52000000 >> 9);
return 0;
}
#ifdef CONFIG_OF_CONTROL
int zynq_sdhci_of_init(const void *blob)
{
int offset = 0;
u32 ret = 0;
u32 reg;
debug("ZYNQ SDHCI: Initialization\n");
do {
offset = fdt_node_offset_by_compatible(blob, offset,
"arasan,sdhci-8.9a");
if (offset != -1) {
reg = fdtdec_get_addr(blob, offset, "reg");
if (reg != FDT_ADDR_T_NONE) {
ret |= zynq_sdhci_init(reg);
} else {
debug("ZYNQ SDHCI: Can't get base address\n");
return -1;
}
}
} while (offset != -1);
return ret;
}
#endif