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tty: serial: 8250: Set RS232 as default for Moxa PCIe board initialization

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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: Crescent CY Hsieh <crescentcy.hsieh@moxa.com>
Link: https://lore.kernel.org/r/20240102053133.9795-1-crescentcy.hsieh@moxa.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Crescent CY Hsieh 2024-01-02 13:31:33 +08:00 committed by Greg Kroah-Hartman
parent d8a0284479
commit 9903f2f2e1
1 changed files with 4 additions and 3 deletions
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7
drivers/tty/serial/8250/8250_pci.c
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@ -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.