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[ARM] pxa: update pxa serial driver to use clk support 

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2007-08-20 10:28:15 +01:00 committed by Russell King
parent ebebd9b0a1
commit b049bd9de4
1 changed files with 23 additions and 5 deletions
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28
drivers/serial/pxa.c
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@ -42,6 +42,7 @@
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/clk.h>
#include <asm/io.h>
#include <asm/hardware.h>
@ -55,7 +56,7 @@ struct uart_pxa_port {
unsigned char lcr;
unsigned char mcr;
unsigned int lsr_break_flag;
unsigned int cken;
struct clk *clk;
char *name;
};
@ -351,6 +352,8 @@ static int serial_pxa_startup(struct uart_port *port)
else
up->mcr = 0;
up->port.uartclk = clk_get_rate(up->clk);
/*
* Allocate the IRQ
*/
@ -546,9 +549,11 @@ serial_pxa_pm(struct uart_port *port, unsigned int state,
unsigned int oldstate)
{
struct uart_pxa_port *up = (struct uart_pxa_port *)port;
pxa_set_cken(up->cken, !state);
if (!state)
udelay(1);
clk_enable(up->clk);
else
clk_disable(up->clk);
}
static void serial_pxa_release_port(struct uart_port *port)
@ -635,6 +640,8 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
struct uart_pxa_port *up = serial_pxa_ports[co->index];
unsigned int ier;
clk_enable(up->clk);
/*
* First save the IER then disable the interrupts
*/
@ -649,6 +656,8 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
*/
wait_for_xmitr(up);
serial_out(up, UART_IER, ier);
clk_disable(up->clk);
}
static int __init
@ -752,6 +761,12 @@ static int serial_pxa_probe(struct platform_device *dev)
if (!sport)
return -ENOMEM;
sport->clk = clk_get(&dev->dev, "UARTCLK");
if (IS_ERR(sport->clk)) {
ret = PTR_ERR(sport->clk);
goto err_free;
}
sport->port.type = PORT_PXA;
sport->port.iotype = UPIO_MEM;
sport->port.mapbase = mmres->start;
@ -761,7 +776,7 @@ static int serial_pxa_probe(struct platform_device *dev)
sport->port.line = dev->id;
sport->port.dev = &dev->dev;
sport->port.flags = UPF_IOREMAP | UPF_BOOT_AUTOCONF;
sport->port.uartclk = 921600 * 16;
sport->port.uartclk = clk_get_rate(sport->clk);
/*
* Is it worth keeping this?
@ -780,7 +795,7 @@ static int serial_pxa_probe(struct platform_device *dev)
sport->port.membase = ioremap(mmres->start, mmres->end - mmres->start + 1);
if (!sport->port.membase) {
ret = -ENOMEM;
goto err_free;
goto err_clk;
}
serial_pxa_ports[dev->id] = sport;
@ -790,6 +805,8 @@ static int serial_pxa_probe(struct platform_device *dev)
return 0;
err_clk:
clk_put(sport->clk);
err_free:
kfree(sport);
return ret;
@ -802,6 +819,7 @@ static int serial_pxa_remove(struct platform_device *dev)
platform_set_drvdata(dev, NULL);
uart_remove_one_port(&serial_pxa_reg, &sport->port);
clk_put(sport->clk);
kfree(sport);
return 0;