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| author | Tobias Klauser <tklauser@distanz.ch> | 2011-02-09 12:57:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-02-17 22:31:58 +0300 |
| commit | 2780ad42f5fe6739882603c61c8decba6e50eaa2 (patch) | |
| tree | 65d26144ecd8319d5d9243770d034ee4f1ba33ab /drivers/tty/serial/altera_uart.c | |
| parent | e96fabd8791aad30a3c8a03919893ae3e2e3df25 (diff) | |
| download | linux-2780ad42f5fe6739882603c61c8decba6e50eaa2.tar.xz | |
tty: serial: altera_uart: Use port->regshift to store bus shift
Use the regshift member of struct uart_port to store the address stride
from platform data. This way we can save one dereference per call of
altera_uart_readl and altera_uart_writel.
This also allows us to use the driver without platform data, which is
needed for device tree support in the Nios2 port.
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty/serial/altera_uart.c')
| -rw-r--r-- | drivers/tty/serial/altera_uart.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c index dee7a0eb6ea1..3a573528555e 100644 --- a/drivers/tty/serial/altera_uart.c +++ b/drivers/tty/serial/altera_uart.c @@ -86,16 +86,12 @@ struct altera_uart { static u32 altera_uart_readl(struct uart_port *port, int reg) { - struct altera_uart_platform_uart *platp = port->private_data; - - return readl(port->membase + (reg << platp->bus_shift)); + return readl(port->membase + (reg << port->regshift)); } static void altera_uart_writel(struct uart_port *port, u32 dat, int reg) { - struct altera_uart_platform_uart *platp = port->private_data; - - writel(dat, port->membase + (reg << platp->bus_shift)); + writel(dat, port->membase + (reg << port->regshift)); } static unsigned int altera_uart_tx_empty(struct uart_port *port) @@ -546,13 +542,17 @@ static int __devinit altera_uart_probe(struct platform_device *pdev) if (!port->membase) return -ENOMEM; + if (platp) + port->regshift = platp->bus_shift; + else + port->regshift = 0; + port->line = i; port->type = PORT_ALTERA_UART; port->iotype = SERIAL_IO_MEM; port->uartclk = platp->uartclk; port->ops = &altera_uart_ops; port->flags = UPF_BOOT_AUTOCONF; - port->private_data = platp; uart_add_one_port(&altera_uart_driver, port); |