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Date: Tue, 30 Jul 2019 17:56:08 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Andrey Smirnov <andrew.smirnov@...il.com>
Cc: linux-serial@...r.kernel.org, Stefan Agner <stefan@...er.ch>,
Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>,
Chris Healy <cphealy@...il.com>,
Cory Tusar <cory.tusar@....aero>,
Lucas Stach <l.stach@...gutronix.de>,
Jiri Slaby <jslaby@...e.com>, linux-imx@....com,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 19/24] tty: serial: fsl_lpuart: Introduce
lpuart_tx_dma_startup()
On Mon, Jul 29, 2019 at 12:52:21PM -0700, Andrey Smirnov wrote:
> Code configure DMA TX path in lpuart_startup(), lpuart32_startup() and
> lpuart_resume() is doing exactly the same thing, so move it into a
> standalone subroutine.
>
> Signed-off-by: Andrey Smirnov <andrew.smirnov@...il.com>
> Cc: Stefan Agner <stefan@...er.ch>
> Cc: Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>
> Cc: Chris Healy <cphealy@...il.com>
> Cc: Cory Tusar <cory.tusar@....aero>
> Cc: Lucas Stach <l.stach@...gutronix.de>
> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Cc: Jiri Slaby <jslaby@...e.com>
> Cc: linux-imx@....com
> Cc: linux-serial@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> ---
> drivers/tty/serial/fsl_lpuart.c | 53 ++++++++++++++-------------------
> 1 file changed, 23 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
> index 2ad5750fe511..558acf29cbed 100644
> --- a/drivers/tty/serial/fsl_lpuart.c
> +++ b/drivers/tty/serial/fsl_lpuart.c
> @@ -1434,6 +1434,26 @@ static void rx_dma_timer_init(struct lpuart_port *sport)
> add_timer(&sport->lpuart_timer);
> }
>
> +static void lpuart_tx_dma_startup(struct lpuart_port *sport)
> +{
> + u32 uartbaud;
> +
> + if (sport->dma_tx_chan && !lpuart_dma_tx_request(&sport->port)) {
> + init_waitqueue_head(&sport->dma_wait);
> + sport->lpuart_dma_tx_use = true;
> + if (lpuart_is_32(sport)) {
> + uartbaud = lpuart32_read(&sport->port, UARTBAUD);
> + lpuart32_write(&sport->port,
> + uartbaud | UARTBAUD_TDMAE, UARTBAUD);
> + } else {
> + writeb(readb(sport->port.membase + UARTCR5) |
> + UARTCR5_TDMAS, sport->port.membase + UARTCR5);
> + }
> + } else {
> + sport->lpuart_dma_tx_use = false;
> + }
> +}
> +
> static int lpuart_startup(struct uart_port *port)
> {
> struct lpuart_port *sport = container_of(port, struct lpuart_port, port);
> @@ -1471,14 +1491,7 @@ static int lpuart_startup(struct uart_port *port)
> sport->lpuart_dma_rx_use = false;
> }
>
> - if (sport->dma_tx_chan && !lpuart_dma_tx_request(port)) {
> - init_waitqueue_head(&sport->dma_wait);
> - sport->lpuart_dma_tx_use = true;
> - temp = readb(port->membase + UARTCR5);
> - writeb(temp | UARTCR5_TDMAS, port->membase + UARTCR5);
> - } else {
> - sport->lpuart_dma_tx_use = false;
> - }
> + lpuart_tx_dma_startup(port);
>
> spin_unlock_irqrestore(&sport->port.lock, flags);
>
> @@ -1522,14 +1535,7 @@ static int lpuart32_startup(struct uart_port *port)
> sport->lpuart_dma_rx_use = false;
> }
>
> - if (sport->dma_tx_chan && !lpuart_dma_tx_request(port)) {
> - init_waitqueue_head(&sport->dma_wait);
> - sport->lpuart_dma_tx_use = true;
> - temp = lpuart32_read(&sport->port, UARTBAUD);
> - lpuart32_write(&sport->port, temp | UARTBAUD_TDMAE, UARTBAUD);
> - } else {
> - sport->lpuart_dma_tx_use = false;
> - }
> + lpuart_tx_dma_startup(port);
>
> if (sport->lpuart_dma_rx_use) {
> /* RXWATER must be 0 */
> @@ -2581,20 +2587,7 @@ static int lpuart_resume(struct device *dev)
> }
> }
>
> - if (sport->dma_tx_chan && !lpuart_dma_tx_request(&sport->port)) {
> - init_waitqueue_head(&sport->dma_wait);
> - sport->lpuart_dma_tx_use = true;
> - if (lpuart_is_32(sport)) {
> - temp = lpuart32_read(&sport->port, UARTBAUD);
> - lpuart32_write(&sport->port,
> - temp | UARTBAUD_TDMAE, UARTBAUD);
> - } else {
> - writeb(readb(sport->port.membase + UARTCR5) |
> - UARTCR5_TDMAS, sport->port.membase + UARTCR5);
> - }
> - } else {
> - sport->lpuart_dma_tx_use = false;
> - }
> + lpuart_tx_dma_startup(sport);
>
> if (lpuart_is_32(sport)) {
> if (sport->lpuart_dma_rx_use) {
> --
> 2.21.0
>
This patch breaks the build:
drivers/tty/serial/fsl_lpuart.c: In function lpuart_startup:
drivers/tty/serial/fsl_lpuart.c:1494:24: error: passing argument 1 of lpuart_tx_dma_startup from incompatible pointer type [-Werror=incompatible-pointer-types]
1494 | lpuart_tx_dma_startup(port);
| ^~~~
| |
| struct uart_port *
drivers/tty/serial/fsl_lpuart.c:1438:55: note: expected struct lpuart_port * but argument is of type struct uart_port *
1438 | static void lpuart_tx_dma_startup(struct lpuart_port *sport)
| ~~~~~~~~~~~~~~~~~~~~^~~~~
drivers/tty/serial/fsl_lpuart.c: In function lpuart32_startup:
drivers/tty/serial/fsl_lpuart.c:1537:24: error: passing argument 1 of lpuart_tx_dma_startup from incompatible pointer type [-Werror=incompatible-pointer-types]
1537 | lpuart_tx_dma_startup(port);
| ^~~~
| |
| struct uart_port *
drivers/tty/serial/fsl_lpuart.c:1438:55: note: expected struct lpuart_port * but argument is of type struct uart_port *
1438 | static void lpuart_tx_dma_startup(struct lpuart_port *sport)
| ~~~~~~~~~~~~~~~~~~~~^~~~~
cc1: some warnings being treated as errors
So I've stopped applying the series here.
Please fix up and resend the remaining ones.
thanks,
greg k-h
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