diff options
Diffstat (limited to 'target/linux/generic/backport-4.14/180-earlycon-initialize-port-uartclk-based-on-clock-frequency-property.patch')
| -rw-r--r-- | target/linux/generic/backport-4.14/180-earlycon-initialize-port-uartclk-based-on-clock-frequency-property.patch | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/target/linux/generic/backport-4.14/180-earlycon-initialize-port-uartclk-based-on-clock-frequency-property.patch b/target/linux/generic/backport-4.14/180-earlycon-initialize-port-uartclk-based-on-clock-frequency-property.patch deleted file mode 100644 index 1b98958af4..0000000000 --- a/target/linux/generic/backport-4.14/180-earlycon-initialize-port-uartclk-based-on-clock-frequency-property.patch +++ /dev/null @@ -1,45 +0,0 @@ -From 814453adea7d081ad8917aa0f32d6a14165a3563 Mon Sep 17 00:00:00 2001 -From: Michal Simek <michal.simek@xilinx.com> -Date: Tue, 10 Apr 2018 15:32:28 +0200 -Subject: earlycon: Initialize port->uartclk based on clock-frequency property - -From: Michal Simek <michal.simek@xilinx.com> - -commit 814453adea7d081ad8917aa0f32d6a14165a3563 upstream. - -On DT based platforms when current-speed property is present baudrate -is setup. Also port->uartclk is initialized to bogus BASE_BAUD * 16 -value. Drivers like uartps/ns16550 contain logic when baudrate and -uartclk is used for baudrate calculation. - -The patch is reading optional clock-frequency property to replace bogus -BASE_BAUD * 16 calculation to have proper baudrate calculation. - -[-stable comment: commit 31cb9a8575ca ("earlycon: initialise baud field - of earlycon device structure") has changed 8250_early.c behavior which - now tries to setup UART speed. Ignoring clock-frequency results in - wrong value of calculated divisor & malformed early console output.] - -Fixes: 31cb9a8575ca ("earlycon: initialise baud field of earlycon device structure") -Signed-off-by: Michal Simek <michal.simek@xilinx.com> -[rmilecki: add -stable comment and Fixes tag] -Signed-off-by: Rafał Miłecki <rafal@milecki.pl> -Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> - ---- - drivers/tty/serial/earlycon.c | 4 ++++ - 1 file changed, 4 insertions(+) - ---- a/drivers/tty/serial/earlycon.c -+++ b/drivers/tty/serial/earlycon.c -@@ -289,6 +289,10 @@ int __init of_setup_earlycon(const struc - if (val) - early_console_dev.baud = be32_to_cpu(*val); - -+ val = of_get_flat_dt_prop(node, "clock-frequency", NULL); -+ if (val) -+ port->uartclk = be32_to_cpu(*val); -+ - if (options) { - early_console_dev.baud = simple_strtoul(options, NULL, 0); - strlcpy(early_console_dev.options, options, |