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Groups > linux.kernel > #1447375
| From | Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC 3/3] serial: pch_uart: Add support for reading clock-frequency from DT |
| Date | 2016-07-20 19:30 +0200 |
| Message-ID | <rX3tM-4mx-25@gated-at.bofh.it> (permalink) |
| References | <rX3tL-4mx-5@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
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> --- drivers/tty/serial/Kconfig | 2 +- drivers/tty/serial/pch_uart.c | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 7e3a58c..b4a8d92 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1379,7 +1379,7 @@ 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 ea4ffc2..d79265c935 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -1826,6 +1826,10 @@ 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 -- 1.9.1
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[RFC 3/3] serial: pch_uart: Add support for reading clock-frequency from DT Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com> - 2016-07-20 19:30 +0200
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