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serial: sh-sci: Fix up the cpufreq notifier to use the proper port clock. 

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2008-12-16 18:36:16 +09:00
parent d9341b51f2
commit 027e687249
1 changed files with 10 additions and 28 deletions
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38
drivers/serial/sh-sci.c
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@ -748,7 +748,7 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
return ret;
}
#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_HAVE_CLK)
#ifdef CONFIG_HAVE_CLK
/*
* Here we define a transistion notifier so that we can update all of our
* ports' baud rate when the peripheral clock changes.
@ -756,41 +756,20 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
static int sci_notifier(struct notifier_block *self,
unsigned long phase, void *p)
{
struct cpufreq_freqs *freqs = p;
int i;
if ((phase == CPUFREQ_POSTCHANGE) ||
(phase == CPUFREQ_RESUMECHANGE)) {
(phase == CPUFREQ_RESUMECHANGE))
for (i = 0; i < SCI_NPORTS; i++) {
struct uart_port *port = &sci_ports[i].port;
struct clk *clk;
/*
* Update the uartclk per-port if frequency has
* changed, since it will no longer necessarily be
* consistent with the old frequency.
*
* Really we want to be able to do something like
* uart_change_speed() or something along those lines
* here to implicitly reset the per-port baud rate..
*
* Clean this up later..
*/
clk = clk_get(NULL, "module_clk");
port->uartclk = clk_get_rate(clk);
clk_put(clk);
struct sci_port *s = &sci_ports[i];
s->port.uartclk = clk_get_rate(s->clk);
}
printk(KERN_INFO "%s: got a postchange notification "
"for cpu %d (old %d, new %d)\n",
__func__, freqs->cpu, freqs->old, freqs->new);
}
return NOTIFY_OK;
}
static struct notifier_block sci_nb = { &sci_notifier, NULL, 0 };
#endif /* CONFIG_CPU_FREQ && CONFIG_HAVE_CLK */
#endif
static int sci_request_irq(struct sci_port *port)
{
@ -1326,9 +1305,8 @@ static int __devinit sci_probe(struct platform_device *dev)
uart_add_one_port(&sci_uart_driver, &sciport->port);
}
#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_HAVE_CLK)
#ifdef CONFIG_HAVE_CLK
cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER);
dev_info(&dev->dev, "CPU frequency notifier registered\n");
#endif
#ifdef CONFIG_SH_STANDARD_BIOS
@ -1348,6 +1326,10 @@ static int __devexit sci_remove(struct platform_device *dev)
{
int i;
#ifdef CONFIG_HAVE_CLK
cpufreq_unregister_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER);
#endif
for (i = 0; i < SCI_NPORTS; i++)
uart_remove_one_port(&sci_uart_driver, &sci_ports[i].port);