Il 02/02/2021 01:02, Eric Tremblay ha scritto:

On 2021-01-28 7:12 p.m., Giulio Benetti wrote:

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Hi Eric,

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Il giorno 29 gen 2021, alle ore 00:37, Eric Tremblay [off-list ref] ha scritto:

The series is mainly about the support of 8250 UART without TEMT
interrupt. I saw that there was some development in the past but
it was never merged. Since the last discussion were quite some
time ago, I was not sure if I should post a v4 over the
last v3 or start from scratch so I decided to post a new patch. Please
advice if I should have done the reverse.

Please keep my and Heiko’s SoB and add your SoB too describing between [ ] what Heiko has done and what you’ve done.
For example:
SoB: Giulio
SoB: Heiko
[Heiko: ...]
SoB Eric
[Eric: improved timeout etc.]

I will add them in the next version, thanks for mentioning it.

Thank you

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The approach is a little different from the last proposed patch which was
doing using a polling at 100us. I tought that it could be really long on
some fast baudrate and really not that long on slow baudrate. The current
approach is to calculate the time of a bytes when the settings are changed.
When we get the interrupt for the empty FIFO, it's the longer it can take
to empty the shift register.

Good idea.

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The other two patches are to use that features with the PORT_16550A_FSL64
found on some chip like the LS1043A.

Do you mind to add my 8250_dw patch that was originally part of this patchset? I had to send it
soon, you’ve preceded me :-)

I think there was still a comment pending on that patch. I think you should resubmit
since I think it's a bit out-of-scope for me.

Ah yes, you're correct, I will submit it then.

Best regards
-- 
Giulio Benetti
CTO

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Thank you
Best regards
Giulio

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Thanks

Eric Tremblay (3):
serial: 8250: Handle UART without interrupt on TEMT using em485
serial: 8250: add compatible for fsl,16550-FIFO64
serial: 8250: remove UART_CAP_TEMT on PORT_16550A_FSL64

drivers/tty/serial/8250/8250.h            |  1 +
drivers/tty/serial/8250/8250_bcm2835aux.c |  2 +-
drivers/tty/serial/8250/8250_of.c         |  5 ++
drivers/tty/serial/8250/8250_omap.c       |  2 +-
drivers/tty/serial/8250/8250_port.c       | 89 ++++++++++++++++++++++-
include/linux/serial_8250.h               |  2 +
6 files changed, 98 insertions(+), 3 deletions(-)

-- 
2.17.1