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serial: clps711x: Using CPU clock subsystem for getting base UART speed

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Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alexander Shiyan 2012-10-14 11:05:26 +04:00 committed by Greg Kroah-Hartman
parent 3c7e9eb160
commit c08f0153f5
1 changed files with 15 additions and 5 deletions
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20
drivers/tty/serial/clps711x.c
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@ -37,6 +37,7 @@
#include <linux/serial_core.h> #include <linux/serial_core.h>
#include <linux/serial.h> #include <linux/serial.h>
#include <linux/io.h> #include <linux/io.h>
#include <linux/clk.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <mach/hardware.h> #include <mach/hardware.h>
@ -58,6 +59,7 @@
struct clps711x_port { struct clps711x_port {
struct uart_driver uart; struct uart_driver uart;
struct clk *uart_clk;
struct uart_port port[UART_CLPS711X_NR]; struct uart_port port[UART_CLPS711X_NR];
int tx_enabled[UART_CLPS711X_NR]; int tx_enabled[UART_CLPS711X_NR];
#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE #ifdef CONFIG_SERIAL_CLPS711X_CONSOLE
@ -299,10 +301,9 @@ clps711xuart_set_termios(struct uart_port *port, struct ktermios *termios,
*/ */
termios->c_cflag |= CREAD; termios->c_cflag |= CREAD;
/* /* Ask the core to calculate the divisor for us */
* Ask the core to calculate the divisor for us. baud = uart_get_baud_rate(port, termios, old, port->uartclk / 4096,
*/ port->uartclk / 16);
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
quot = uart_get_divisor(port, baud); quot = uart_get_divisor(port, baud);
switch (termios->c_cflag & CSIZE) { switch (termios->c_cflag & CSIZE) {
@ -487,6 +488,13 @@ static int __devinit uart_clps711x_probe(struct platform_device *pdev)
} }
platform_set_drvdata(pdev, s); 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.owner = THIS_MODULE;
s->uart.dev_name = "ttyCL"; s->uart.dev_name = "ttyCL";
s->uart.major = UART_CLPS711X_MAJOR; 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); ret = uart_register_driver(&s->uart);
if (ret) { if (ret) {
dev_err(&pdev->dev, "Registering UART driver failed\n"); dev_err(&pdev->dev, "Registering UART driver failed\n");
devm_clk_put(&pdev->dev, s->uart_clk);
goto err_out; 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].type = PORT_CLPS711X;
s->port[i].fifosize = 16; s->port[i].fifosize = 16;
s->port[i].flags = UPF_SKIP_TEST | UPF_FIXED_TYPE; 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; s->port[i].ops = &uart_clps711x_ops;
WARN_ON(uart_add_one_port(&s->uart, &s->port[i])); 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++) for (i = 0; i < UART_CLPS711X_NR; i++)
uart_remove_one_port(&s->uart, &s->port[i]); uart_remove_one_port(&s->uart, &s->port[i]);
devm_clk_put(&pdev->dev, s->uart_clk);
uart_unregister_driver(&s->uart); uart_unregister_driver(&s->uart);
platform_set_drvdata(pdev, NULL); platform_set_drvdata(pdev, NULL);