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| author | Andre Przywara <andre.przywara@arm.com> | 2015-05-21 17:26:16 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-05-24 13:08:50 -0700 |
| commit | 95166a3fd5dc1f06321abb28b5713afd2bcc87c4 (patch) | |
| tree | 99fb1aef442127db44ae5b161dfc29f9a34488c7 /drivers/tty/serial | |
| parent | 867b8e8e89f2f72882d267be3e035978fdd45a4a (diff) | |
| download | blackbird-obmc-linux-95166a3fd5dc1f06321abb28b5713afd2bcc87c4.tar.gz blackbird-obmc-linux-95166a3fd5dc1f06321abb28b5713afd2bcc87c4.zip | |
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>
Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
Tested-by: Naresh Bhat <nbhat@cavium.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/amba-pl011.c | 57 |
1 files changed, 32 insertions, 25 deletions
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 209aeb68abad..a43039daa6af 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1635,34 +1635,15 @@ 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); @@ -1678,6 +1659,32 @@ 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 |
