Commit 6befa9d8 authored by Michal Simek's avatar Michal Simek Committed by Greg Kroah-Hartman

serial: of-serial: Remove device_type = "serial" registration

Do not probe all serial drivers by of_serial.c which are using
device_type = "serial"; property. Only drivers which have valid
compatible strings listed in the driver should be probed.

When PORT_UNKNOWN is setup probe will fail anyway.

Arnd quotation about driver historical background:
"when I wrote that driver initially, the idea was that it would
get used as a stub to hook up all other serial drivers but after
that, the common code learned to create platform devices from DT"

This patch fix the problem with on the system with xilinx_uartps and
16550a where of_serial failed to register for xilinx_uartps and because
of irq_dispose_mapping() removed irq_desc. Then when xilinx_uartps was asking
for irq with request_irq() EINVAL is returned.
Signed-off-by: default avatarMichal Simek <michal.simek@xilinx.com>
CC: <stable@vger.kernel.org>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5c90c07b
...@@ -346,7 +346,6 @@ static const struct of_device_id of_platform_serial_table[] = { ...@@ -346,7 +346,6 @@ static const struct of_device_id of_platform_serial_table[] = {
{ .compatible = "ibm,qpace-nwp-serial", { .compatible = "ibm,qpace-nwp-serial",
.data = (void *)PORT_NWPSERIAL, }, .data = (void *)PORT_NWPSERIAL, },
#endif #endif
{ .type = "serial", .data = (void *)PORT_UNKNOWN, },
{ /* end of list */ }, { /* end of list */ },
}; };
......
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