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serial: 8250_exar: Move Exar pieces to custom ->startup()

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There is a one more step to consolidate Exar bits under 8250_exar umbrella.
This time we introduce a custom ->startup() callback where the Exar specific
settings are applied.

Cc: Robert Middleton <robert.middleton@rm5248.com>
Cc: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Cc: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20191011115610.81507-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andy Shevchenko 2019-10-11 14:56:10 +03:00 committed by Greg Kroah-Hartman
parent 7ca932e441
commit 6e73113784
2 changed files with 19 additions and 14 deletions
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19
drivers/tty/serial/8250/8250_exar.c
View File

@ -166,6 +166,23 @@ static void xr17v35x_set_divisor(struct uart_port *p, unsigned int baud,
serial_port_out(p, 0x2, quot_frac);
}
static int xr17v35x_startup(struct uart_port *port)
{
/*
* First enable access to IER [7:5], ISR [5:4], FCR [5:4],
* MCR [7:5] and MSR [7:0]
*/
serial_port_out(port, UART_XR_EFR, UART_EFR_ECB);
/*
* Make sure all interrups are masked until initialization is
* complete and the FIFOs are cleared
*/
serial_port_out(port, UART_IER, 0);
return serial8250_do_startup(port);
}
static void exar_shutdown(struct uart_port *port)
{
unsigned char lsr;
@ -212,6 +229,8 @@ static int default_setup(struct exar8250 *priv, struct pci_dev *pcidev,
port->port.get_divisor = xr17v35x_get_divisor;
port->port.set_divisor = xr17v35x_set_divisor;
port->port.startup = xr17v35x_startup;
} else {
port->port.type = PORT_XR17D15X;
}

14
drivers/tty/serial/8250/8250_port.c
View File

@ -2114,20 +2114,6 @@ int serial8250_do_startup(struct uart_port *port)
enable_rsa(up);
#endif
if (port->type == PORT_XR17V35X) {
/*
* First enable access to IER [7:5], ISR [5:4], FCR [5:4],
* MCR [7:5] and MSR [7:0]
*/
serial_port_out(port, UART_XR_EFR, UART_EFR_ECB);
/*
* Make sure all interrups are masked until initialization is
* complete and the FIFOs are cleared
*/
serial_port_out(port, UART_IER, 0);
}
/*
* Clear the FIFO buffers and disable them.
* (they will be reenabled in set_termios())