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serial: tegra: Change lower tolerance baud rate limit for tegra20 and tegra30

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The current implementation uses 0 as lower limit for the baud rate
tolerance for tegra20 and tegra30 chips which causes isses on UART
initialization as soon as baud rate clock is lower than required even
when within the standard UART tolerance of +/- 4%.

This fix aligns the implementation with the initial commit description
of +/- 4% tolerance for tegra chips other than tegra186 and
tegra194.

Fixes: d781ec21ba ("serial: tegra: report clk rate errors")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Patrik John <patrik.john@u-blox.com>
Link: https://lore.kernel.org/r/sig.19614244f8.20211123132737.88341-1-patrik.john@u-blox.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Patrik John 2021-11-23 14:27:38 +01:00 committed by Greg Kroah-Hartman
parent 0b993fc1fe
commit b40de7469e
1 changed files with 2 additions and 2 deletions
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4
drivers/tty/serial/serial-tegra.c
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@ -1506,7 +1506,7 @@ static struct tegra_uart_chip_data tegra20_uart_chip_data = {
.fifo_mode_enable_status = false,
.uart_max_port = 5,
.max_dma_burst_bytes = 4,
.error_tolerance_low_range = 0,
.error_tolerance_low_range = -4,
.error_tolerance_high_range = 4,
};
@ -1517,7 +1517,7 @@ static struct tegra_uart_chip_data tegra30_uart_chip_data = {
.fifo_mode_enable_status = false,
.uart_max_port = 5,
.max_dma_burst_bytes = 4,
.error_tolerance_low_range = 0,
.error_tolerance_low_range = -4,
.error_tolerance_high_range = 4,
};