Commit 9903f2f2 authored by Crescent CY Hsieh's avatar Crescent CY Hsieh Committed by Greg Kroah-Hartman
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tty: serial: 8250: Set RS232 as default for Moxa PCIe board initialization 



After switching the serial interface of the Moxa RS232 PCIe boards, it
fails to reset to RS232 when attempting to reload 8250_pci driver.

This patch set RS232 as the default setting during the initialization of
Moxa PCIe board.

Signed-off-by: default avatarCrescent CY Hsieh <crescentcy.hsieh@moxa.com>
Link: https://lore.kernel.org/r/20240102053133.9795-1-crescentcy.hsieh@moxa.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent d8a02844

drivers/tty/serial/8250/8250_pci.c

+4 −3
Original line number Diff line number Diff line
@@ -2039,12 +2039,13 @@ static int pci_moxa_init(struct pci_dev *dev) 
	unsigned short device = dev->device;

	resource_size_t iobar_addr = pci_resource_start(dev, 2);

	unsigned int num_ports = (device & 0x00F0) >> 4, i;

	u8 val;

	u8 val, init_mode = MOXA_RS232;



	if (!(pci_moxa_supported_rs(dev) & MOXA_SUPP_RS232)) {

		for (i = 0; i < num_ports; ++i)

			pci_moxa_set_interface(dev, i, MOXA_RS422);

		init_mode = MOXA_RS422;

	}

	for (i = 0; i < num_ports; ++i)

		pci_moxa_set_interface(dev, i, init_mode);



	/*

	 * Enable hardware buffer to prevent break signal output when system boots up.