diff options
| author | Andre Przywara <andre.przywara@arm.com> | 2014-09-04 20:47:10 +0100 |
|---|---|---|
| committer | Graeme Gregory <graeme.gregory@linaro.org> | 2015-02-16 09:28:56 +0000 |
| commit | bda9e5f9ef044b2c68c3cb8d4396f514a7c3fe5e (patch) | |
| tree | 9ba1d79c862c486de42cdb13a9477508551cff05 | |
| parent | df1cbb17a6bb97fe90ae9337d084cbab11b6ee28 (diff) | |
drivers: PL011: refactor pl011_shutdown()
Split the pl011_shutdown() function into smaller chunks to allow
easier reuse later when adding SBSA support.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
| -rw-r--r-- | drivers/tty/serial/amba-pl011.c | 59 |
1 files changed, 34 insertions, 25 deletions
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 4be4c19b8263..73730607760f 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1666,34 +1666,15 @@ static void pl011_shutdown_channel(struct uart_amba_port *uap, writew(val, uap->port.membase + lcrh); } -static void pl011_shutdown(struct uart_port *port) +/* + * disable the port. It should not disable RTS and DTR. + * Also RTS and DTR state should be preserved to restore + * it during startup(). + */ +static void pl011_disable_uart(struct uart_amba_port *uap) { - struct uart_amba_port *uap = - container_of(port, struct uart_amba_port, port); unsigned int cr; - /* - * disable all interrupts - */ - spin_lock_irq(&uap->port.lock); - uap->im = 0; - writew(uap->im, uap->port.membase + UART011_IMSC); - writew(0xffff, uap->port.membase + UART011_ICR); - spin_unlock_irq(&uap->port.lock); - - pl011_dma_shutdown(uap); - - /* - * Free the interrupt - */ - free_irq(uap->port.irq, uap); - - /* - * disable the port - * disable the port. It should not disable RTS and DTR. - * Also RTS and DTR state should be preserved to restore - * it during startup(). - */ uap->autorts = false; spin_lock_irq(&uap->port.lock); cr = readw(uap->port.membase + UART011_CR); @@ -1709,6 +1690,34 @@ static void pl011_shutdown(struct uart_port *port) pl011_shutdown_channel(uap, uap->lcrh_rx); if (uap->lcrh_rx != uap->lcrh_tx) pl011_shutdown_channel(uap, uap->lcrh_tx); +} + +static void pl011_disable_interrupts(struct uart_amba_port *uap) +{ + spin_lock_irq(&uap->port.lock); + + /* + * mask all interrupts and clear all pending ones + */ + uap->im = 0; + writew(uap->im, uap->port.membase + UART011_IMSC); + writew(0xffff, uap->port.membase + UART011_ICR); + + spin_unlock_irq(&uap->port.lock); +} + +static void pl011_shutdown(struct uart_port *port) +{ + struct uart_amba_port *uap = + container_of(port, struct uart_amba_port, port); + + pl011_disable_interrupts(uap); + + pl011_dma_shutdown(uap); + + free_irq(uap->port.irq, uap); + + pl011_disable_uart(uap); /* * Shut down the clock producer |