diff options
Diffstat (limited to 'drivers/tty/serial/fsl_linflexuart.c')
| -rw-r--r-- | drivers/tty/serial/fsl_linflexuart.c | 64 |
1 files changed, 31 insertions, 33 deletions
diff --git a/drivers/tty/serial/fsl_linflexuart.c b/drivers/tty/serial/fsl_linflexuart.c index 6fc21b6684e6..e70a56de1fce 100644 --- a/drivers/tty/serial/fsl_linflexuart.c +++ b/drivers/tty/serial/fsl_linflexuart.c @@ -11,7 +11,7 @@ #include <linux/irq.h> #include <linux/module.h> #include <linux/of.h> -#include <linux/of_device.h> +#include <linux/platform_device.h> #include <linux/serial_core.h> #include <linux/slab.h> #include <linux/tty_flip.h> @@ -174,17 +174,18 @@ static void linflex_put_char(struct uart_port *sport, unsigned char c) static inline void linflex_transmit_buffer(struct uart_port *sport) { - struct circ_buf *xmit = &sport->state->xmit; + struct tty_port *tport = &sport->state->port; + unsigned char c; - while (!uart_circ_empty(xmit)) { - linflex_put_char(sport, xmit->buf[xmit->tail]); - uart_xmit_advance(sport, 1); + while (uart_fifo_get(sport, &c)) { + linflex_put_char(sport, c); + sport->icount.tx++; } - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + if (kfifo_len(&tport->xmit_fifo) < WAKEUP_CHARS) uart_write_wakeup(sport); - if (uart_circ_empty(xmit)) + if (kfifo_is_empty(&tport->xmit_fifo)) linflex_stop_tx(sport); } @@ -200,24 +201,24 @@ static void linflex_start_tx(struct uart_port *port) static irqreturn_t linflex_txint(int irq, void *dev_id) { struct uart_port *sport = dev_id; - struct circ_buf *xmit = &sport->state->xmit; + struct tty_port *tport = &sport->state->port; unsigned long flags; - spin_lock_irqsave(&sport->lock, flags); + uart_port_lock_irqsave(sport, &flags); if (sport->x_char) { linflex_put_char(sport, sport->x_char); goto out; } - if (uart_circ_empty(xmit) || uart_tx_stopped(sport)) { + if (kfifo_is_empty(&tport->xmit_fifo) || uart_tx_stopped(sport)) { linflex_stop_tx(sport); goto out; } linflex_transmit_buffer(sport); out: - spin_unlock_irqrestore(&sport->lock, flags); + uart_port_unlock_irqrestore(sport, flags); return IRQ_HANDLED; } @@ -230,7 +231,7 @@ static irqreturn_t linflex_rxint(int irq, void *dev_id) unsigned char rx; bool brk; - spin_lock_irqsave(&sport->lock, flags); + uart_port_lock_irqsave(sport, &flags); status = readl(sport->membase + UARTSR); while (status & LINFLEXD_UARTSR_RMB) { @@ -266,7 +267,7 @@ static irqreturn_t linflex_rxint(int irq, void *dev_id) } } - spin_unlock_irqrestore(&sport->lock, flags); + uart_port_unlock_irqrestore(sport, flags); tty_flip_buffer_push(port); @@ -369,11 +370,11 @@ static int linflex_startup(struct uart_port *port) int ret = 0; unsigned long flags; - spin_lock_irqsave(&port->lock, flags); + uart_port_lock_irqsave(port, &flags); linflex_setup_watermark(port); - spin_unlock_irqrestore(&port->lock, flags); + uart_port_unlock_irqrestore(port, flags); ret = devm_request_irq(port->dev, port->irq, linflex_int, 0, DRIVER_NAME, port); @@ -386,14 +387,14 @@ static void linflex_shutdown(struct uart_port *port) unsigned long ier; unsigned long flags; - spin_lock_irqsave(&port->lock, flags); + uart_port_lock_irqsave(port, &flags); /* disable interrupts */ ier = readl(port->membase + LINIER); ier &= ~(LINFLEXD_LINIER_DRIE | LINFLEXD_LINIER_DTIE); writel(ier, port->membase + LINIER); - spin_unlock_irqrestore(&port->lock, flags); + uart_port_unlock_irqrestore(port, flags); devm_free_irq(port->dev, port->irq, port); } @@ -474,7 +475,7 @@ linflex_set_termios(struct uart_port *port, struct ktermios *termios, cr &= ~LINFLEXD_UARTCR_PCE; } - spin_lock_irqsave(&port->lock, flags); + uart_port_lock_irqsave(port, &flags); port->read_status_mask = 0; @@ -507,7 +508,7 @@ linflex_set_termios(struct uart_port *port, struct ktermios *termios, writel(cr1, port->membase + LINCR1); - spin_unlock_irqrestore(&port->lock, flags); + uart_port_unlock_irqrestore(port, flags); } static const char *linflex_type(struct uart_port *port) @@ -646,14 +647,14 @@ linflex_console_write(struct console *co, const char *s, unsigned int count) if (sport->sysrq) locked = 0; else if (oops_in_progress) - locked = spin_trylock_irqsave(&sport->lock, flags); + locked = uart_port_trylock_irqsave(sport, &flags); else - spin_lock_irqsave(&sport->lock, flags); + uart_port_lock_irqsave(sport, &flags); linflex_string_write(sport, s, count); if (locked) - spin_unlock_irqrestore(&sport->lock, flags); + uart_port_unlock_irqrestore(sport, flags); } /* @@ -827,19 +828,18 @@ static int linflex_probe(struct platform_device *pdev) sport->line = ret; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - return -ENODEV; - - sport->mapbase = res->start; - sport->membase = devm_ioremap_resource(&pdev->dev, res); + sport->membase = devm_platform_get_and_ioremap_resource(pdev, 0, &res); if (IS_ERR(sport->membase)) return PTR_ERR(sport->membase); + sport->mapbase = res->start; + + ret = platform_get_irq(pdev, 0); + if (ret < 0) + return ret; sport->dev = &pdev->dev; - sport->type = PORT_LINFLEXUART; sport->iotype = UPIO_MEM; - sport->irq = platform_get_irq(pdev, 0); + sport->irq = ret; sport->ops = &linflex_pops; sport->flags = UPF_BOOT_AUTOCONF; sport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_FSL_LINFLEXUART_CONSOLE); @@ -851,13 +851,11 @@ static int linflex_probe(struct platform_device *pdev) return uart_add_one_port(&linflex_reg, sport); } -static int linflex_remove(struct platform_device *pdev) +static void linflex_remove(struct platform_device *pdev) { struct uart_port *sport = platform_get_drvdata(pdev); uart_remove_one_port(&linflex_reg, sport); - - return 0; } #ifdef CONFIG_PM_SLEEP |