diff options
| author | Marek Vasut <marex@denx.de> | 2019-12-20 12:44:57 +0100 |
|---|---|---|
| committer | Jagan Teki <jagan@amarulasolutions.com> | 2020-01-27 22:27:21 +0530 |
| commit | 6954756a1567bd4dc36081651c266dbcf9ad4ef5 (patch) | |
| tree | bfd1b1dc9b1f728f2c5ff588e7049d2b474e86bd | |
| parent | bfcd9298b29c16fdada9d8e772dd9aaff7760f43 (diff) | |
cmd: spi: Permit setting bus frequency
The 'sspi' command hard-coded 1 MHz bus frequency for all transmissions.
Allow changing that at runtime by specifying '@freq' bus frequency in Hz.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
| -rw-r--r-- | cmd/spi.c | 14 |
1 files changed, 10 insertions, 4 deletions
@@ -28,6 +28,7 @@ static unsigned int bus; static unsigned int cs; static unsigned int mode; +static unsigned int freq; static int bitlen; static uchar dout[MAX_SPI_BYTES]; static uchar din[MAX_SPI_BYTES]; @@ -45,12 +46,12 @@ static int do_spi_xfer(int bus, int cs) str = strdup(name); if (!str) return -ENOMEM; - ret = spi_get_bus_and_cs(bus, cs, 1000000, mode, "spi_generic_drv", + ret = spi_get_bus_and_cs(bus, cs, freq, mode, "spi_generic_drv", str, &dev, &slave); if (ret) return ret; #else - slave = spi_setup_slave(bus, cs, 1000000, mode); + slave = spi_setup_slave(bus, cs, freq, mode); if (!slave) { printf("Invalid device %d:%d\n", bus, cs); return -EINVAL; @@ -106,6 +107,8 @@ int do_spi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) * We use the last specified parameters, unless new ones are * entered. */ + if (freq == 0) + freq = 1000000; if ((flag & CMD_FLAG_REPEAT) == 0) { @@ -119,7 +122,9 @@ int do_spi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) bus = CONFIG_DEFAULT_SPI_BUS; } if (*cp == '.') - mode = simple_strtoul(cp+1, NULL, 10); + mode = simple_strtoul(cp+1, &cp, 10); + if (*cp == '@') + freq = simple_strtoul(cp+1, &cp, 10); } if (argc >= 3) bitlen = simple_strtoul(argv[2], NULL, 10); @@ -159,10 +164,11 @@ int do_spi (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) U_BOOT_CMD( sspi, 5, 1, do_spi, "SPI utility command", - "[<bus>:]<cs>[.<mode>] <bit_len> <dout> - Send and receive bits\n" + "[<bus>:]<cs>[.<mode>][@<freq>] <bit_len> <dout> - Send and receive bits\n" "<bus> - Identifies the SPI bus\n" "<cs> - Identifies the chip select\n" "<mode> - Identifies the SPI mode to use\n" + "<freq> - Identifies the SPI bus frequency in Hz\n" "<bit_len> - Number of bits to send (base 10)\n" "<dout> - Hexadecimal string that gets sent" ); |