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spicmds: Rework spi config commands

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Rework the spi_config commands so that bus configuration and shutdown
message configuration is done separately from the main "config_spi"
command.  This makes the spi configuration more flexible.  It's now
possible to use software spi without a CS pin.  It's now possible to
define multiple SPI messages to send on a shutdown event.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2019-08-06 11:44:29 -04:00
parent 30bd7c0e47
commit c2a08962b7
9 changed files with 115 additions and 116 deletions
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4
src/linux/spidev.c
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@@ -97,13 +97,13 @@ spi_transfer(struct spi_config config, uint8_t receive_data
int ret = ioctl(config.fd, SPI_IOC_MESSAGE(1), &transfer);
if (ret < 0) {
report_errno("spi ioctl", ret);
shutdown("Unable to issue spi ioctl");
try_shutdown("Unable to issue spi ioctl");
}
} else {
int ret = write(config.fd, data, len);
if (ret < 0) {
report_errno("write spi", ret);
shutdown("Unable to write to spi");
try_shutdown("Unable to write to spi");
}
}
}