diff options
| author | Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> | 2016-08-12 12:48:54 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-08-31 15:45:19 +0200 |
| commit | 7789e5a2accdbc5d506405c11ef4e5469440e96b (patch) | |
| tree | ab44f96a4c0ac701c222e0f236494a5b81d1f8a0 | |
| parent | bed3d7babafda16cf2e095366dec3f64143b370a (diff) | |
serial: pch_uart: Add support for reading clock-frequency from DT
The MIPS based Boston platform provides a 25MHz clock to the UART.
Enable the driver for MIPS and add support in the driver to read
the frequency from device tree.
Signed-off-by: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/serial/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/tty/serial/pch_uart.c | 5 |
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 518db24a5b36..c7831407a882 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1380,7 +1380,7 @@ config SERIAL_IFX6X60 config SERIAL_PCH_UART tristate "Intel EG20T PCH/LAPIS Semicon IOH(ML7213/ML7223/ML7831) UART" - depends on PCI && (X86_32 || COMPILE_TEST) + depends on PCI && (X86_32 || MIPS || COMPILE_TEST) select SERIAL_CORE help This driver is for PCH(Platform controller Hub) UART of Intel EG20T diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index ea4ffc2ebb2f..23672f8a343e 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -31,6 +31,7 @@ #include <linux/dmi.h> #include <linux/nmi.h> #include <linux/delay.h> +#include <linux/of.h> #include <linux/debugfs.h> #include <linux/dmaengine.h> @@ -1826,6 +1827,10 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev, priv->trigger_level = 1; priv->fcr = 0; + if (pdev->dev.of_node) + of_property_read_u32(pdev->dev.of_node, "clock-frequency" + , &user_uartclk); + #ifdef CONFIG_SERIAL_PCH_UART_CONSOLE pch_uart_ports[board->line_no] = priv; #endif |