linux-kernel - Re: [PATCH 6/6] tty: serial: Add 8250-core based omap driver

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Date:	Fri, 8 Aug 2014 14:05:37 +0300
From:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Tony Lindgren <tony@...mide.com>, Felipe Balbi <balbi@...com>,
	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH 6/6] tty: serial: Add 8250-core based omap driver

On Wed, Jul 09, 2014 at 07:49:37PM +0200, Sebastian Andrzej Siewior wrote:
> diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
> index bf06a4c..1cbfc8c 100644
> --- a/drivers/tty/serial/8250/8250_core.c
> +++ b/drivers/tty/serial/8250/8250_core.c
> @@ -263,6 +263,12 @@ static const struct serial8250_config uart_config[] = {
>  		.fcr		= UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10,
>  		.flags		= UART_CAP_FIFO | UART_CAP_AFE,
>  	},
> +	[PORT_OMAP_16750] = {
> +		.name		= "OMAP",
> +		.fifo_size	= 64,
> +		.tx_loadsz	= 64,
> +		.flags		= UART_CAP_FIFO | UART_CAP_EFR | UART_CAP_SLEEP,
> +	},
>  	[PORT_TEGRA] = {
>  		.name		= "Tegra",
>  		.fifo_size	= 32,
> @@ -1340,6 +1346,8 @@ static void serial8250_stop_rx(struct uart_port *port)
>  	pm_runtime_get_sync(port->dev);
>  
>  	up->ier &= ~UART_IER_RLSI;
> +	if (port->type == PORT_OMAP_16750)
> +		up->ier &= ~UART_IER_RDI;
>  	up->port.read_status_mask &= ~UART_LSR_DR;
>  	serial_port_out(port, UART_IER, up->ier);

Alan couldn't UART_IER_RDI be always cleared here with all port types?
Actually, shouldn't it be?

Then the custom port type PORT_OMAP_16750 would not be needed.

-- 
heikki
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