diff options
| author | Inochi Amaoto <inochiama@gmail.com> | 2024-10-24 14:21:03 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-12-14 20:04:09 +0100 |
| commit | 1648c7000f9dd128cafc6c157fdf77cf3481cae3 (patch) | |
| tree | 8add0aaefa5c9ce2d66d749f8b5a0b89886fcfa1 | |
| parent | f43324df566a29cf48b466584bd127663f3fe0a4 (diff) | |
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@linux.intel.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Link: https://lore.kernel.org/r/20241024062105.782330-4-inochiama@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/tty/serial/8250/8250_dw.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index ab9e7f204260..51894c93c8a3 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); |