korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-17 17:24:17 +08:00
Code Issues Packages Projects Releases Wiki Activity

sh-sci: add platform device private data

Browse Source 
This patch adds per-platform private data to the sh-sci driver.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Magnus Damm 2009-01-21 15:13:42 +00:00 committed by Paul Mundt
parent 7b551f9daa
commit e552de2413
1 changed files with 85 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

127
drivers/serial/sh-sci.c
View File

@ -47,6 +47,7 @@
#include <linux/clk.h>
#include <linux/ctype.h>
#include <linux/err.h>
#include <linux/list.h>
#ifdef CONFIG_SUPERH
#include <asm/clock.h>
@ -77,6 +78,16 @@ struct sci_port {
#ifdef CONFIG_HAVE_CLK
/* Port clock */
struct clk *clk;
#endif
struct list_head node;
};
struct sh_sci_priv {
spinlock_t lock;
struct list_head ports;
#ifdef CONFIG_HAVE_CLK
struct notifier_block clk_nb;
#endif
};
@ -726,19 +737,22 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
static int sci_notifier(struct notifier_block *self,
unsigned long phase, void *p)
{
int i;
struct sh_sci_priv *priv = container_of(self,
struct sh_sci_priv, clk_nb);
struct sci_port *sci_port;
unsigned long flags;
if ((phase == CPUFREQ_POSTCHANGE) ||
(phase == CPUFREQ_RESUMECHANGE))
for (i = 0; i < SCI_NPORTS; i++) {
struct sci_port *s = &sci_ports[i];
s->port.uartclk = clk_get_rate(s->clk);
}
(phase == CPUFREQ_RESUMECHANGE)) {
spin_lock_irqsave(&priv->lock, flags);
list_for_each_entry(sci_port, &priv->ports, node)
sci_port->port.uartclk = clk_get_rate(sci_port->clk);
spin_unlock_irqrestore(&priv->lock, flags);
}
return NOTIFY_OK;
}
static struct notifier_block sci_nb = { &sci_notifier, NULL, 0 };
#endif
static int sci_request_irq(struct sci_port *port)
@ -1201,6 +1215,27 @@ static struct uart_driver sci_uart_driver = {
.cons = SCI_CONSOLE,
};
static int __devexit sci_remove(struct platform_device *dev)
{
struct sh_sci_priv *priv = platform_get_drvdata(dev);
struct sci_port *p;
unsigned long flags;
#ifdef CONFIG_HAVE_CLK
cpufreq_unregister_notifier(&priv->clk_nb, CPUFREQ_TRANSITION_NOTIFIER);
#endif
spin_lock_irqsave(&priv->lock, flags);
list_for_each_entry(p, &priv->ports, node)
uart_remove_one_port(&sci_uart_driver, &p->port);
spin_unlock_irqrestore(&priv->lock, flags);
kfree(priv);
return 0;
}
/*
* Register a set of serial devices attached to a platform device. The
* list is terminated with a zero flags entry, which means we expect
@ -1210,7 +1245,22 @@ static struct uart_driver sci_uart_driver = {
static int __devinit sci_probe(struct platform_device *dev)
{
struct plat_sci_port *p = dev->dev.platform_data;
struct sh_sci_priv *priv;
int i, ret = -EINVAL;
unsigned long flags;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
INIT_LIST_HEAD(&priv->ports);
spin_lock_init(&priv->lock);
platform_set_drvdata(dev, priv);
#ifdef CONFIG_HAVE_CLK
priv->clk_nb.notifier_call = sci_notifier;
cpufreq_register_notifier(&priv->clk_nb, CPUFREQ_TRANSITION_NOTIFIER);
#endif
for (i = 0; p && p->flags != 0; p++, i++) {
struct sci_port *sciport = &sci_ports[i];
@ -1254,12 +1304,19 @@ static int __devinit sci_probe(struct platform_device *dev)
memcpy(&sciport->irqs, &p->irqs, sizeof(p->irqs));
uart_add_one_port(&sci_uart_driver, &sciport->port);
}
ret = uart_add_one_port(&sci_uart_driver, &sciport->port);
#ifdef CONFIG_HAVE_CLK
cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER);
#endif
if (ret && (p->flags & UPF_IOREMAP)) {
iounmap(p->membase);
goto err_unreg;
}
INIT_LIST_HEAD(&sciport->node);
spin_lock_irqsave(&priv->lock, flags);
list_add(&sciport->node, &priv->ports);
spin_unlock_irqrestore(&priv->lock, flags);
}
#ifdef CONFIG_SH_STANDARD_BIOS
sh_bios_gdb_detach();
@ -1268,50 +1325,36 @@ static int __devinit sci_probe(struct platform_device *dev)
return 0;
err_unreg:
for (i = i - 1; i >= 0; i--)
uart_remove_one_port(&sci_uart_driver, &sci_ports[i].port);
sci_remove(dev);
return ret;
}
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);
return 0;
}
static int sci_suspend(struct platform_device *dev, pm_message_t state)
{
int i;
struct sh_sci_priv *priv = platform_get_drvdata(dev);
struct sci_port *p;
unsigned long flags;
for (i = 0; i < SCI_NPORTS; i++) {
struct sci_port *p = &sci_ports[i];
spin_lock_irqsave(&priv->lock, flags);
list_for_each_entry(p, &priv->ports, node)
uart_suspend_port(&sci_uart_driver, &p->port);
if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev)
uart_suspend_port(&sci_uart_driver, &p->port);
}
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int sci_resume(struct platform_device *dev)
{
int i;
struct sh_sci_priv *priv = platform_get_drvdata(dev);
struct sci_port *p;
unsigned long flags;
for (i = 0; i < SCI_NPORTS; i++) {
struct sci_port *p = &sci_ports[i];
spin_lock_irqsave(&priv->lock, flags);
list_for_each_entry(p, &priv->ports, node)
uart_resume_port(&sci_uart_driver, &p->port);
if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev)
uart_resume_port(&sci_uart_driver, &p->port);
}
spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}