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| author |   Paras Sharma <parashar@codeaurora.org> | 2020-09-30 11:35:26 +0530 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-30 09:12:03 +0200 |
| commit | c9ca43d42ed8d5fd635d327a664ed1d8579eb2af (patch) | |
| tree | 3be2c9a5517b3d47aa9d792868fd43e48ce3682d /drivers/tty | |
| parent | serial: mvebu-uart: fix unused variable warning (diff) | |
| download | linux-dev-c9ca43d42ed8d5fd635d327a664ed1d8579eb2af.tar.xz linux-dev-c9ca43d42ed8d5fd635d327a664ed1d8579eb2af.zip | |
serial: qcom_geni_serial: To correct QUP Version detection logic
For QUP IP versions 2.5 and above the oversampling rate is
halved from 32 to 16.
Commit ce734600545f ("tty: serial: qcom_geni_serial: Update
the oversampling rate") is pushed to handle this scenario.
But the existing logic is failing to classify QUP Version 3.0
into the correct group ( 2.5 and above).
As result Serial Engine clocks are not configured properly for
baud rate and garbage data is sampled to FIFOs from the line.
So, fix the logic to detect QUP with versions 2.5 and above.
Fixes: ce734600545f ("tty: serial: qcom_geni_serial: Update the oversampling rate")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Paras Sharma <parashar@codeaurora.org>
Reviewed-by: Akash Asthana <akashast@codeaurora.org>
Link: https://lore.kernel.org/r/1601445926-23673-1-git-send-email-parashar@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/qcom_geni_serial.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c index 8da2eb2d1090..291649f02821 100644 --- a/drivers/tty/serial/qcom_geni_serial.c +++ b/drivers/tty/serial/qcom_geni_serial.c @@ -1000,7 +1000,7 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport, sampling_rate = UART_OVERSAMPLING; /* Sampling rate is halved for IP versions >= 2.5 */ ver = geni_se_get_qup_hw_version(&port->se); - if (GENI_SE_VERSION_MAJOR(ver) >= 2 && GENI_SE_VERSION_MINOR(ver) >= 5) + if (ver >= QUP_SE_VERSION_2_5) sampling_rate /= 2; clk_rate = get_clk_div_rate(baud, sampling_rate, &clk_div); |