diff options
| author | Alexander Shiyan <shc_work@mail.ru> | 2012-10-14 11:05:26 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-10-24 22:39:47 +0400 |
| commit | c08f0153f54ee0a7f3eeaf7f48dce1a71b3f8c7d (patch) | |
| tree | 3110102cf53b7cb176f5713c9d67dd770a786c65 /drivers/tty/serial/clps711x.c | |
| parent | 3c7e9eb1603d21659a38b92f5b764d41d88fa652 (diff) | |
| download | linux-c08f0153f54ee0a7f3eeaf7f48dce1a71b3f8c7d.tar.xz | |
serial: clps711x: Using CPU clock subsystem for getting base UART speed
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/clps711x.c')
| -rw-r--r-- | drivers/tty/serial/clps711x.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c index 3b17d1932484..0884939d29cf 100644 --- a/drivers/tty/serial/clps711x.c +++ b/drivers/tty/serial/clps711x.c @@ -37,6 +37,7 @@ #include <linux/serial_core.h> #include <linux/serial.h> #include <linux/io.h> +#include <linux/clk.h> #include <linux/platform_device.h> #include <mach/hardware.h> @@ -58,6 +59,7 @@ struct clps711x_port { struct uart_driver uart; + struct clk *uart_clk; struct uart_port port[UART_CLPS711X_NR]; int tx_enabled[UART_CLPS711X_NR]; #ifdef CONFIG_SERIAL_CLPS711X_CONSOLE @@ -299,10 +301,9 @@ clps711xuart_set_termios(struct uart_port *port, struct ktermios *termios, */ termios->c_cflag |= CREAD; - /* - * Ask the core to calculate the divisor for us. - */ - baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); + /* Ask the core to calculate the divisor for us */ + baud = uart_get_baud_rate(port, termios, old, port->uartclk / 4096, + port->uartclk / 16); quot = uart_get_divisor(port, baud); switch (termios->c_cflag & CSIZE) { @@ -487,6 +488,13 @@ static int __devinit uart_clps711x_probe(struct platform_device *pdev) } platform_set_drvdata(pdev, s); + s->uart_clk = devm_clk_get(&pdev->dev, "uart"); + if (IS_ERR(s->uart_clk)) { + dev_err(&pdev->dev, "Can't get UART clocks\n"); + ret = PTR_ERR(s->uart_clk); + goto err_out; + } + s->uart.owner = THIS_MODULE; s->uart.dev_name = "ttyCL"; s->uart.major = UART_CLPS711X_MAJOR; @@ -505,6 +513,7 @@ static int __devinit uart_clps711x_probe(struct platform_device *pdev) ret = uart_register_driver(&s->uart); if (ret) { dev_err(&pdev->dev, "Registering UART driver failed\n"); + devm_clk_put(&pdev->dev, s->uart_clk); goto err_out; } @@ -516,7 +525,7 @@ static int __devinit uart_clps711x_probe(struct platform_device *pdev) s->port[i].type = PORT_CLPS711X; s->port[i].fifosize = 16; s->port[i].flags = UPF_SKIP_TEST | UPF_FIXED_TYPE; - s->port[i].uartclk = 3686400; + s->port[i].uartclk = clk_get_rate(s->uart_clk); s->port[i].ops = &uart_clps711x_ops; WARN_ON(uart_add_one_port(&s->uart, &s->port[i])); } @@ -537,6 +546,7 @@ static int __devexit uart_clps711x_remove(struct platform_device *pdev) for (i = 0; i < UART_CLPS711X_NR; i++) uart_remove_one_port(&s->uart, &s->port[i]); + devm_clk_put(&pdev->dev, s->uart_clk); uart_unregister_driver(&s->uart); platform_set_drvdata(pdev, NULL); |