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DM: cleanup resource for uart.

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Add deinit function for uart.
Another work is add resource cleanup functions which is called
by other components when they are using uart.

Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Yin Fengwei
2018-04-13 10:31:37 +08:00
committed by Jack Ren
parent c8585a22e3
commit 1a2a07476b
3 changed files with 42 additions and 0 deletions
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28
devicemodel/hw/platform/uart_core.c
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@@ -274,6 +274,18 @@ uart_opentty(struct uart_vdev *uart)
}
}
static void
uart_closetty(struct uart_vdev *uart)
{
if (uart->tty.fd != STDIN_FILENO)
mevent_delete_close(uart->mev);
else
mevent_delete(uart->mev);
uart->mev = 0;
ttyclose();
}
static uint8_t
modem_status(uint8_t mcr)
{
@@ -692,3 +704,19 @@ uart_set_backend(struct uart_vdev *uart, const char *opts)
return retval;
}
void
uart_release_backend(struct uart_vdev *uart, const char *opts)
{
if (opts == NULL)
return;
uart_closetty(uart);
if (strcmp("stdio", opts) == 0) {
stdio_in_use = false;
} else
close(uart->tty.fd);
uart->tty.fd = 0;
uart->tty.opened = false;
}