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serial: sh-sci: Depend on HAVE_CLK unconditionally. 

The sh-sci code conditionalized the clock framework support in order to
give the other platforms a chance to catch up. sh64 supported this some
time ago and the forthcoming ARM changes handle this as well, this leaves
h8300 as the odd one out. H8300 has had since 2.5 to merge it's sh-sci
support upstream, and has yet to do so. At this point I will no longer be
holding back the driver to support an unreponsive architecture, 7 years
is quite enough of a grace period. Support is easily implemented on the
architecture if and when it ever decides to merge its changes upstream.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2009-11-25 16:23:35 +09:00
parent 6ba653830c
commit edad1f208e
3 changed files with 3 additions and 54 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/serial/Kconfig
View File

@ -996,7 +996,7 @@ config SERIAL_IP22_ZILOG_CONSOLE
config SERIAL_SH_SCI
tristate "SuperH SCI(F) serial port support"
depends on SUPERH || H8300
depends on HAVE_CLK && (SUPERH || H8300)
select SERIAL_CORE
config SERIAL_SH_SCI_NR_UARTS

53
drivers/serial/sh-sci.c
View File

@ -50,7 +50,6 @@
#include <linux/list.h>
#ifdef CONFIG_SUPERH
#include <asm/clock.h>
#include <asm/sh_bios.h>
#endif
@ -79,22 +78,18 @@ struct sci_port {
struct timer_list break_timer;
int break_flag;
#ifdef CONFIG_HAVE_CLK
/* Interface clock */
struct clk *iclk;
/* Data clock */
struct clk *dclk;
#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
};
/* Function prototypes */
@ -156,32 +151,6 @@ static void sci_poll_put_char(struct uart_port *port, unsigned char c)
}
#endif /* CONFIG_CONSOLE_POLL || CONFIG_SERIAL_SH_SCI_CONSOLE */
#if defined(__H8300S__)
enum { sci_disable, sci_enable };
static void h8300_sci_config(struct uart_port *port, unsigned int ctrl)
{
volatile unsigned char *mstpcrl = (volatile unsigned char *)MSTPCRL;
int ch = (port->mapbase - SMR0) >> 3;
unsigned char mask = 1 << (ch+1);
if (ctrl == sci_disable)
*mstpcrl |= mask;
else
*mstpcrl &= ~mask;
}
static void h8300_sci_enable(struct uart_port *port)
{
h8300_sci_config(port, sci_enable);
}
static void h8300_sci_disable(struct uart_port *port)
{
h8300_sci_config(port, sci_disable);
}
#endif
#if defined(__H8300H__) || defined(__H8300S__)
static void sci_init_pins(struct uart_port *port, unsigned int cflag)
{
@ -733,7 +702,6 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
return ret;
}
#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.
@ -751,7 +719,6 @@ static int sci_notifier(struct notifier_block *self,
spin_lock_irqsave(&priv->lock, flags);
list_for_each_entry(sci_port, &priv->ports, node)
sci_port->port.uartclk = clk_get_rate(sci_port->dclk);
spin_unlock_irqrestore(&priv->lock, flags);
}
@ -778,7 +745,6 @@ static void sci_clk_disable(struct uart_port *port)
clk_disable(sci_port->dclk);
}
#endif
static int sci_request_irq(struct sci_port *port)
{
@ -1077,21 +1043,10 @@ static void __devinit sci_init_single(struct platform_device *dev,
sci_port->port.iotype = UPIO_MEM;
sci_port->port.line = index;
sci_port->port.fifosize = 1;
#if defined(__H8300H__) || defined(__H8300S__)
#ifdef __H8300S__
sci_port->enable = h8300_sci_enable;
sci_port->disable = h8300_sci_disable;
#endif
sci_port->port.uartclk = CONFIG_CPU_CLOCK;
#elif defined(CONFIG_HAVE_CLK)
sci_port->iclk = p->clk ? clk_get(&dev->dev, p->clk) : NULL;
sci_port->dclk = clk_get(&dev->dev, "peripheral_clk");
sci_port->enable = sci_clk_enable;
sci_port->disable = sci_clk_disable;
#else
#error "Need a valid uartclk"
#endif
sci_port->break_timer.data = (unsigned long)sci_port;
sci_port->break_timer.function = sci_break_timer;
@ -1106,7 +1061,6 @@ static void __devinit sci_init_single(struct platform_device *dev,
sci_port->type = sci_port->port.type = p->type;
memcpy(&sci_port->irqs, &p->irqs, sizeof(p->irqs));
}
#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
@ -1239,14 +1193,11 @@ static int sci_remove(struct platform_device *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);
@ -1307,10 +1258,8 @@ static int __devinit sci_probe(struct platform_device *dev)
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
if (dev->id != -1) {
ret = sci_probe_single(dev, dev->id, p, &sci_ports[dev->id]);

2
drivers/serial/sh-sci.h
View File

@ -1,5 +1,5 @@
#include <linux/serial_core.h>
#include <asm/io.h>
#include <linux/io.h>
#include <linux/gpio.h>
#if defined(CONFIG_H83007) || defined(CONFIG_H83068)