From: Richard Genoud <richard.genoud@gmail.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Geert Uytterhoeven" <geert@linux-m68k.org>,
"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
linux-serial@vger.kernel.org,
"Nicolas Ferre" <nicolas.ferre@microchip.com>,
"Alexandre Belloni" <alexandre.belloni@bootlin.com>,
"Ludovic Desroches" <ludovic.desroches@microchip.com>,
linux-kernel@vger.kernel.org,
"Richard Genoud" <richard.genoud@gmail.com>
Subject: [PATCH] tty/serial: atmel: remove unneeded atmel_get_lines_status function
Date: Fri, 23 Aug 2019 15:41:09 +0200 [thread overview]
Message-ID: <20190823134109.12402-1-richard.genoud@gmail.com> (raw)
Since commit ce59e48fdbad ("serial: mctrl_gpio: implement interrupt
handling"), the GPIOs interrupts are handled by mctrl_gpio_irq_handle().
So, atmel_get_lines_status() can be completely killed and replaced by :
atmel_uart_readl(port, ATMEL_US_CSR);
Signed-off-by: Richard Genoud <richard.genoud@gmail.com>
---
drivers/tty/serial/atmel_serial.c | 48 ++-----------------------------
1 file changed, 2 insertions(+), 46 deletions(-)
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index 9a54c9e6d36e..a8dc8af83f39 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -294,50 +294,6 @@ static void atmel_tasklet_schedule(struct atmel_uart_port *atmel_port,
tasklet_schedule(t);
}
-static unsigned int atmel_get_lines_status(struct uart_port *port)
-{
- struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
- unsigned int status, ret = 0;
-
- status = atmel_uart_readl(port, ATMEL_US_CSR);
-
- mctrl_gpio_get(atmel_port->gpios, &ret);
-
- if (!IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(atmel_port->gpios,
- UART_GPIO_CTS))) {
- if (ret & TIOCM_CTS)
- status &= ~ATMEL_US_CTS;
- else
- status |= ATMEL_US_CTS;
- }
-
- if (!IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(atmel_port->gpios,
- UART_GPIO_DSR))) {
- if (ret & TIOCM_DSR)
- status &= ~ATMEL_US_DSR;
- else
- status |= ATMEL_US_DSR;
- }
-
- if (!IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(atmel_port->gpios,
- UART_GPIO_RI))) {
- if (ret & TIOCM_RI)
- status &= ~ATMEL_US_RI;
- else
- status |= ATMEL_US_RI;
- }
-
- if (!IS_ERR_OR_NULL(mctrl_gpio_to_gpiod(atmel_port->gpios,
- UART_GPIO_DCD))) {
- if (ret & TIOCM_CD)
- status &= ~ATMEL_US_DCD;
- else
- status |= ATMEL_US_DCD;
- }
-
- return status;
-}
-
/* Enable or disable the rs485 support */
static int atmel_config_rs485(struct uart_port *port,
struct serial_rs485 *rs485conf)
@@ -1453,7 +1409,7 @@ static irqreturn_t atmel_interrupt(int irq, void *dev_id)
spin_lock(&atmel_port->lock_suspended);
do {
- status = atmel_get_lines_status(port);
+ status = atmel_uart_readl(port, ATMEL_US_CSR);
mask = atmel_uart_readl(port, ATMEL_US_IMR);
pending = status & mask;
if (!pending)
@@ -2002,7 +1958,7 @@ static int atmel_startup(struct uart_port *port)
}
/* Save current CSR for comparison in atmel_tasklet_func() */
- atmel_port->irq_status_prev = atmel_get_lines_status(port);
+ atmel_port->irq_status_prev = atmel_uart_readl(port, ATMEL_US_CSR);
/*
* Finally, enable the serial port
--
2.19.2
next reply other threads:[~2019-08-23 13:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-23 13:41 Richard Genoud [this message]
2019-08-23 14:32 ` [PATCH] tty/serial: atmel: remove unneeded atmel_get_lines_status function Uwe Kleine-König
2019-08-25 8:45 ` Greg Kroah-Hartman
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