diff options
| author | Jianmin Lv <lvjianmin@loongson.cn> | 2021-07-15 14:16:37 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-21 12:31:02 +0200 |
| commit | 130432076f3b44dab19a5872b59fcfbb50a4ed2d (patch) | |
| tree | 57b9925c86bf01ea6269d2bce544a739d3220bf7 /drivers/tty/serial/8250/8250_pnp.c | |
| parent | cb3ea80b7c84a2bb521f41af75678667dddca544 (diff) | |
| download | linux-130432076f3b44dab19a5872b59fcfbb50a4ed2d.tar.bz2 | |
serial: 8250_pnp: Support configurable clock frequency
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>
Diffstat (limited to 'drivers/tty/serial/8250/8250_pnp.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_pnp.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_pnp.c b/drivers/tty/serial/8250/8250_pnp.c index de90d681b64c..98e5ee4d0d08 100644 --- a/drivers/tty/serial/8250/8250_pnp.c +++ b/drivers/tty/serial/8250/8250_pnp.c @@ -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); |