diff options
Diffstat (limited to 'drivers/tty/serial/pic32_uart.c')
| -rw-r--r-- | drivers/tty/serial/pic32_uart.c | 43 |
1 files changed, 19 insertions, 24 deletions
diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c index 196a4e678451..14d50bd7f1bd 100644 --- a/drivers/tty/serial/pic32_uart.c +++ b/drivers/tty/serial/pic32_uart.c @@ -8,12 +8,11 @@ * Sorin-Andrei Pistirica <andrei.pistirica@microchip.com> */ +#include <linux/gpio/consumer.h> #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/of.h> -#include <linux/of_device.h> #include <linux/of_irq.h> -#include <linux/of_gpio.h> #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> @@ -244,7 +243,7 @@ static void pic32_uart_break_ctl(struct uart_port *port, int ctl) struct pic32_sport *sport = to_pic32_sport(port); unsigned long flags; - spin_lock_irqsave(&port->lock, flags); + uart_port_lock_irqsave(port, &flags); if (ctl) pic32_uart_writel(sport, PIC32_SET(PIC32_UART_STA), @@ -253,7 +252,7 @@ static void pic32_uart_break_ctl(struct uart_port *port, int ctl) pic32_uart_writel(sport, PIC32_CLR(PIC32_UART_STA), PIC32_UART_STA_UTXBRK); - spin_unlock_irqrestore(&port->lock, flags); + uart_port_unlock_irqrestore(port, flags); } /* get port type in string format */ @@ -275,7 +274,7 @@ static void pic32_uart_do_rx(struct uart_port *port) */ max_count = PIC32_UART_RX_FIFO_DEPTH; - spin_lock(&port->lock); + uart_port_lock(port); tty = &port->state->port; @@ -332,7 +331,7 @@ static void pic32_uart_do_rx(struct uart_port *port) } while (--max_count); - spin_unlock(&port->lock); + uart_port_unlock(port); tty_flip_buffer_push(tty); } @@ -343,7 +342,7 @@ static void pic32_uart_do_rx(struct uart_port *port) static void pic32_uart_do_tx(struct uart_port *port) { struct pic32_sport *sport = to_pic32_sport(port); - struct circ_buf *xmit = &port->state->xmit; + struct tty_port *tport = &port->state->port; unsigned int max_count = PIC32_UART_TX_FIFO_DEPTH; if (port->x_char) { @@ -358,7 +357,7 @@ static void pic32_uart_do_tx(struct uart_port *port) return; } - if (uart_circ_empty(xmit)) + if (kfifo_is_empty(&tport->xmit_fifo)) goto txq_empty; /* keep stuffing chars into uart tx buffer @@ -372,21 +371,20 @@ static void pic32_uart_do_tx(struct uart_port *port) */ while (!(PIC32_UART_STA_UTXBF & pic32_uart_readl(sport, PIC32_UART_STA))) { - unsigned int c = xmit->buf[xmit->tail]; + unsigned char c; + if (!uart_fifo_get(port, &c)) + break; pic32_uart_writel(sport, PIC32_UART_TX, c); - uart_xmit_advance(port, 1); - if (uart_circ_empty(xmit)) - break; if (--max_count == 0) break; } - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + if (kfifo_len(&tport->xmit_fifo) < WAKEUP_CHARS) uart_write_wakeup(port); - if (uart_circ_empty(xmit)) + if (kfifo_is_empty(&tport->xmit_fifo)) goto txq_empty; return; @@ -411,9 +409,9 @@ static irqreturn_t pic32_uart_tx_interrupt(int irq, void *dev_id) struct uart_port *port = dev_id; unsigned long flags; - spin_lock_irqsave(&port->lock, flags); + uart_port_lock_irqsave(port, &flags); pic32_uart_do_tx(port); - spin_unlock_irqrestore(&port->lock, flags); + uart_port_unlock_irqrestore(port, flags); return IRQ_HANDLED; } @@ -581,9 +579,9 @@ static void pic32_uart_shutdown(struct uart_port *port) unsigned long flags; /* disable uart */ - spin_lock_irqsave(&port->lock, flags); + uart_port_lock_irqsave(port, &flags); pic32_uart_dsbl_and_mask(port); - spin_unlock_irqrestore(&port->lock, flags); + uart_port_unlock_irqrestore(port, flags); clk_disable_unprepare(sport->clk); /* free all 3 interrupts for this UART */ @@ -605,7 +603,7 @@ static void pic32_uart_set_termios(struct uart_port *port, unsigned int quot; unsigned long flags; - spin_lock_irqsave(&port->lock, flags); + uart_port_lock_irqsave(port, &flags); /* disable uart and mask all interrupts while changing speed */ pic32_uart_dsbl_and_mask(port); @@ -673,7 +671,7 @@ static void pic32_uart_set_termios(struct uart_port *port, /* enable uart */ pic32_uart_en_and_unmask(port); - spin_unlock_irqrestore(&port->lock, flags); + uart_port_unlock_irqrestore(port, flags); } /* serial core request to claim uart iomem */ @@ -939,7 +937,7 @@ err: return ret; } -static int pic32_uart_remove(struct platform_device *pdev) +static void pic32_uart_remove(struct platform_device *pdev) { struct uart_port *port = platform_get_drvdata(pdev); struct pic32_sport *sport = to_pic32_sport(port); @@ -948,9 +946,6 @@ static int pic32_uart_remove(struct platform_device *pdev) clk_disable_unprepare(sport->clk); platform_set_drvdata(pdev, NULL); pic32_sports[sport->idx] = NULL; - - /* automatic unroll of sport and gpios */ - return 0; } static const struct of_device_id pic32_serial_dt_ids[] = { |