linux-kernel - Re: [v6] serial: 8250_dw: Add support for big-endian MMIO accesses

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Date:	Tue, 6 Oct 2015 08:56:53 +0100
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Noam Camus <noamc@...hip.com>
Cc:	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
	jslaby@...e.com, peter@...leysoftware.com, fransklaver@...il.com,
	Alexey.Brodkin@...opsys.com, vgupta@...opsys.com
Subject: Re: [v6] serial: 8250_dw: Add support for big-endian MMIO accesses

On Tue, Oct 06, 2015 at 09:39:50AM +0300, Noam Camus wrote:
> From: Noam Camus <noamc@...hip.com>
> 
> Add support for UPIO_MEM32BE in addition to UPIO_MEM32.
> dw8250_serial_out32() extra functionality that is not part of
> the 8250 core driver was moved to new function called
> dw8250_check_LCR().
> 
> For big endian we use 2 new accessors similar to little endian,
> called dw8250_serial_out32be() and dw8250_serial_in32be().
> Both little and big endian accessors use dw8250_check_LCR()
> for their dw8250_serial_out32{,be}().
> 
> In addition I added another 2 accessors inside private_data field of
> uart_port. This second level accessors are set during probe in
> private_data field of uart_port. Now any direct call to readl/writel
> is replaced with those accessors which are endianness aware.
> 
> Last issue:
> readl() for UCV and CPR will not work for port type UPIO_MEM32BE.
> Instead we use the serial_in32() accessor which is initialized
> properly according to endianness.
> 
> Signed-off-by: Noam Camus <noamc@...hip.com>
> ---
>  drivers/tty/serial/8250/8250_dw.c |   72 ++++++++++++++++++++++++++++++++----
>  1 files changed, 64 insertions(+), 8 deletions(-)

Can you please fix the warnings as pointed out by the kbuild testing and
resend this?

thanks,

greg k-h
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