This patch allows a board configuration file to provide default bus
and chip-selects for SPI flash so that first argument to the 'sf' command
is optional.
On boards that use the mxc_spi driver and a GPIO for chip select, this allows
a much simpler command line:
U-Boot> sf probe
instead of
U-Boot> sf probe 0x5300
Signed-off-by: Eric Nelson <eric.nel...@boundarydevices.com>
---
common/cmd_sf.c | 37 +++++++++++++++++++++----------------
1 files changed, 21 insertions(+), 16 deletions(-)
diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index 612fd18..98e4162 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -17,6 +17,12 @@
#ifndef CONFIG_SF_DEFAULT_MODE
# define CONFIG_SF_DEFAULT_MODE SPI_MODE_3
#endif
+#ifndef CONFIG_SF_DEFAULT_CS
+# define CONFIG_SF_DEFAULT_CS 0
+#endif
+#ifndef CONFIG_SF_DEFAULT_BUS
+# define CONFIG_SF_DEFAULT_BUS 0
+#endif
static struct spi_flash *flash;
@@ -63,27 +69,26 @@ static int sf_parse_len_arg(char *arg, ulong *len)
static int do_spi_flash_probe(int argc, char * const argv[])
{
- unsigned int bus = 0;
- unsigned int cs;
+ unsigned int bus = CONFIG_SF_DEFAULT_BUS;
+ unsigned int cs = CONFIG_SF_DEFAULT_CS;
unsigned int speed = CONFIG_SF_DEFAULT_SPEED;
unsigned int mode = CONFIG_SF_DEFAULT_MODE;
char *endp;
struct spi_flash *new;
- if (argc < 2)
- return -1;
-
- cs = simple_strtoul(argv[1], &endp, 0);
- if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
- return -1;
- if (*endp == ':') {
- if (endp[1] == 0)
- return -1;
-
- bus = cs;
- cs = simple_strtoul(endp + 1, &endp, 0);
- if (*endp != 0)
+ if (argc >= 2) {
+ cs = simple_strtoul(argv[1], &endp, 0);
+ if (*argv[1] == 0 || (*endp != 0 && *endp != ':'))
return -1;
+ if (*endp == ':') {
+ if (endp[1] == 0)
+ return -1;
+
+ bus = cs;
+ cs = simple_strtoul(endp + 1, &endp, 0);
+ if (*endp != 0)
+ return -1;
+ }
}
if (argc >= 3) {
@@ -299,7 +304,7 @@ usage:
U_BOOT_CMD(
sf, 5, 1, do_spi_flash,
"SPI flash sub-system",
- "probe [bus:]cs [hz] [mode] - init flash device on given SPI bus\n"
+ "probe [[bus:]cs] [hz] [mode] - init flash device on given SPI bus\n"
" and chip select\n"
"sf read addr offset len - read `len' bytes starting at\n"
" `offset' to memory at `addr'\n"
--
1.7.1
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