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Code Issues Releases Wiki Activity

serial: 8250_pnp: Support configurable clock frequency

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ACPI-based Loongson boards need configurable rather than fixed clock
frequency for serial ports.

Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Link: https://lore.kernel.org/r/20210715061637.134436-1-chenhuacai@loongson.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jianmin Lv 2021-07-15 14:16:37 +08:00 committed by Greg Kroah-Hartman
parent cb3ea80b7c
commit 130432076f
1 changed files with 2 additions and 0 deletions
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2
drivers/tty/serial/8250/8250_pnp.c
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@ -13,6 +13,7 @@
#include <linux/pnp.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/property.h>
#include <linux/serial_core.h>
#include <linux/bitops.h>
@ -475,6 +476,7 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
if (pnp_irq_flags(dev, 0) & IORESOURCE_IRQ_SHAREABLE)
uart.port.flags |= UPF_SHARE_IRQ;
uart.port.uartclk = 1843200;
device_property_read_u32(&dev->dev, "clock-frequency", &uart.port.uartclk);
uart.port.dev = &dev->dev;
line = serial8250_register_8250_port(&uart);