diff options
| author | Ingo Molnar <mingo@kernel.org> | 2012-04-14 13:18:27 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-04-14 13:19:04 +0200 |
| commit | 6ac1ef482d7ae0c690f1640bf6eb818ff9a2d91e (patch) | |
| tree | 021cc9f6b477146fcebe6f3be4752abfa2ba18a9 /drivers/tty/serial/mpc52xx_uart.c | |
| parent | 682968e0c425c60f0dde37977e5beb2b12ddc4cc (diff) | |
| parent | a385ec4f11bdcf81af094c03e2444ee9b7fad2e5 (diff) | |
Merge branch 'perf/core' into perf/uprobes
Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/tty/serial/mpc52xx_uart.c')
| -rw-r--r-- | drivers/tty/serial/mpc52xx_uart.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c index 1093a88a1fe..bedac0d4c9c 100644 --- a/drivers/tty/serial/mpc52xx_uart.c +++ b/drivers/tty/serial/mpc52xx_uart.c @@ -262,8 +262,9 @@ static unsigned int mpc5200b_psc_set_baudrate(struct uart_port *port, port->uartclk / 4); divisor = (port->uartclk + 2 * baud) / (4 * baud); - /* select the proper prescaler and set the divisor */ - if (divisor > 0xffff) { + /* select the proper prescaler and set the divisor + * prefer high prescaler for more tolerance on low baudrates */ + if (divisor > 0xffff || baud <= 115200) { divisor = (divisor + 4) / 8; prescaler = 0xdd00; /* /32 */ } else @@ -507,7 +508,7 @@ static int __init mpc512x_psc_fifoc_init(void) psc_fifoc_irq = irq_of_parse_and_map(np, 0); of_node_put(np); - if (psc_fifoc_irq == NO_IRQ) { + if (psc_fifoc_irq == 0) { pr_err("%s: Can't get FIFOC irq\n", __func__); iounmap(psc_fifoc); return -ENODEV; @@ -1354,7 +1355,7 @@ static int __devinit mpc52xx_uart_of_probe(struct platform_device *op) } psc_ops->get_irq(port, op->dev.of_node); - if (port->irq == NO_IRQ) { + if (port->irq == 0) { dev_dbg(&op->dev, "Could not get irq\n"); return -EINVAL; } |