On Sun, Jun 16, 2013 at 9:32 PM, Shengzhou Liu Shengzhou.Liu@freescale.comwrote:
SDHC pins are multiplexed with IFC and ULPI interfaces. This patch intends to enable SDHC function in case of NOR/NAND/SPI boot aside from SD boot.
If "esdhc" is configured in hwconfig, u-boot will configure multiplexing pins from default IFC to SDHC at runtime to enable SD function. And add minimal necessary mux command for ifc/sdhc/ulpi to conveniently configure multiplexing pins without reboot or updating u-boot.
Signed-off-by: Shengzhou Liu Shengzhou.Liu@freescale.com
v2: updated description.
board/freescale/p1010rdb/p1010rdb.c | 128 +++++++++++++++++++++++++++++++++--- include/configs/P1010RDB.h | 11 ++-- 2 files changed, 125 insertions(+), 14 deletions(-)
diff --git a/board/freescale/p1010rdb/p1010rdb.c b/board/freescale/p1010rdb/p1010rdb.c index 0c30d76..5a2f1f0 100644 --- a/board/freescale/p1010rdb/p1010rdb.c +++ b/board/freescale/p1010rdb/p1010rdb.c
+static int pin_mux_cmd(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[])+{
if (argc < 2)return CMD_RET_USAGE;if (strcmp(argv[1], "ifc") == 0)config_pin_mux(MUX_TYPE_IFC);else if (strcmp(argv[1], "sdhc") == 0)config_pin_mux(MUX_TYPE_SDHC);else if (strcmp(argv[1], "ulpi") == 0)config_pin_mux(MUX_TYPE_ULPI);elsereturn CMD_RET_USAGE;return 0;+}
+U_BOOT_CMD(
mux, 2, 0, pin_mux_cmd,"configure multiplexing pin for IFC/SDHC/ULPI buses","bus_type[ifc/sdhc/ulpi] (e.g. mux sdhc)"
This command name is very generic, but the command is highly-specific to this board. Ideally, you'd come up with code that could be reused by other boards that have similar issues. It should be fairly straightforward to implement a version of this code which allowed arbitrary pin muxing code to register with a name. It would require some discussion on the list. If you're not willing to do that, at least rename the command so it's clear it is just for this board.
Andy