This is a note to let you know that I've just added the patch titled
serial: 8250_dw: Add Sophgo SG2044 quirk
to the 6.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
serial-8250_dw-add-sophgo-sg2044-quirk.patch
and it can be found in the queue-6.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3ce9b49a53de8e0c04f0fcb30f88712788b96f16
Author: Inochi Amaoto <inochiama@xxxxxxxxx>
Date: Thu Oct 24 14:21:03 2024 +0800
serial: 8250_dw: Add Sophgo SG2044 quirk
[ Upstream commit cad4dda82c7eedcfc22597267e710ccbcf39d572 ]
SG2044 relys on an internal divisor when calculating bitrate, which
means a wrong clock for the most common bitrates. So add a quirk for
this uart device to skip the set rate call and only relys on the
internal UART divisor.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Signed-off-by: Inochi Amaoto <inochiama@xxxxxxxxx>
Link: https://lore.kernel.org/r/20241024062105.782330-4-inochiama@xxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index ab9e7f2042602..51894c93c8a31 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -750,7 +750,7 @@ static const struct dw8250_platform_data dw8250_renesas_rzn1_data = {
.quirks = DW_UART_QUIRK_CPR_VALUE | DW_UART_QUIRK_IS_DMA_FC,
};
-static const struct dw8250_platform_data dw8250_starfive_jh7100_data = {
+static const struct dw8250_platform_data dw8250_skip_set_rate_data = {
.usr_reg = DW_UART_USR,
.quirks = DW_UART_QUIRK_SKIP_SET_RATE,
};
@@ -760,7 +760,8 @@ static const struct of_device_id dw8250_of_match[] = {
{ .compatible = "cavium,octeon-3860-uart", .data = &dw8250_octeon_3860_data },
{ .compatible = "marvell,armada-38x-uart", .data = &dw8250_armada_38x_data },
{ .compatible = "renesas,rzn1-uart", .data = &dw8250_renesas_rzn1_data },
- { .compatible = "starfive,jh7100-uart", .data = &dw8250_starfive_jh7100_data },
+ { .compatible = "sophgo,sg2044-uart", .data = &dw8250_skip_set_rate_data },
+ { .compatible = "starfive,jh7100-uart", .data = &dw8250_skip_set_rate_data },
{ /* Sentinel */ }
};
MODULE_DEVICE_TABLE(of, dw8250_of_match);
