Commit a2159b52 authored by Paul Mundt's avatar Paul Mundt
Browse files

serial: sh-sci: Dynamic clock management depends on HAVE_CLK. 



Presently this is conditionalized on sh, and disabled for sh64.
Now that SH-5 ties in to the clock framework, the sh64 exception
can be dropped. Additionally, ARM will want to use the same hooks
once SH-Mobile G3 grows clock framework support, so switch these
paths over to HAVE_CLK now.

Once the H8 and ARM sh-sci users hook up HAVE_CLK, the driver can
be switched over to having an outright dependency on it and the
ifdefs can go away.

Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent bdeb3be7

drivers/serial/sh-sci.c

+15 −28
Original line number Diff line number Diff line
@@ -78,7 +78,7 @@ struct sci_port { 
	struct timer_list	break_timer;

	int			break_flag;



#ifdef CONFIG_SUPERH

#ifdef CONFIG_HAVE_CLK

	/* Port clock */

	struct clk		*clk;

#endif
@@ -831,7 +831,7 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr) 
	return IRQ_HANDLED;

}



#ifdef CONFIG_CPU_FREQ

#if defined(CONFIG_CPU_FREQ) && defined(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.
@@ -860,7 +860,7 @@ static int sci_notifier(struct notifier_block *self, 
			 * Clean this up later..

			 */

			clk = clk_get(NULL, "module_clk");

			port->uartclk = clk_get_rate(clk) * 16;

			port->uartclk = clk_get_rate(clk);

			clk_put(clk);

		}
@@ -873,7 +873,7 @@ static int sci_notifier(struct notifier_block *self, 
}



static struct notifier_block sci_nb = { &sci_notifier, NULL, 0 };

#endif /* CONFIG_CPU_FREQ */

#endif /* CONFIG_CPU_FREQ && CONFIG_HAVE_CLK */



static int sci_request_irq(struct sci_port *port)

{
@@ -1008,7 +1008,7 @@ static int sci_startup(struct uart_port *port) 
	if (s->enable)

		s->enable(port);



#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)

#ifdef CONFIG_HAVE_CLK

	s->clk = clk_get(NULL, "module_clk");

#endif
@@ -1030,7 +1030,7 @@ static void sci_shutdown(struct uart_port *port) 
	if (s->disable)

		s->disable(port);



#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)

#ifdef CONFIG_HAVE_CLK

	clk_put(s->clk);

	s->clk = NULL;

#endif
@@ -1041,24 +1041,11 @@ static void sci_set_termios(struct uart_port *port, struct ktermios *termios, 
{

	struct sci_port *s = &sci_ports[port->line];

	unsigned int status, baud, smr_val;

	int t;

	int t = -1;



	baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);



	switch (baud) {

		case 0:

			t = -1;

			break;

		default:

		{

#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)

			t = SCBRR_VALUE(baud, clk_get_rate(s->clk));

#else

			t = SCBRR_VALUE(baud);

#endif

			break;

		}

	}

	if (likely(baud))

		t = SCBRR_VALUE(baud, port->uartclk);



	do {

		status = sci_in(port, SCxSR);
@@ -1207,17 +1194,17 @@ static void __init sci_init_ports(void) 
		sci_ports[i].disable	= h8300_sci_disable;

#endif

		sci_ports[i].port.uartclk = CONFIG_CPU_CLOCK;

#elif defined(CONFIG_SUPERH64)

		sci_ports[i].port.uartclk = current_cpu_data.module_clock * 16;

#else

#elif defined(CONFIG_HAVE_CLK)

		/*

		 * XXX: We should use a proper SCI/SCIF clock

		 */

		{

			struct clk *clk = clk_get(NULL, "module_clk");

			sci_ports[i].port.uartclk = clk_get_rate(clk) * 16;

			sci_ports[i].port.uartclk = clk_get_rate(clk);

			clk_put(clk);

		}

#else

#error "Need a valid uartclk"

#endif



		sci_ports[i].break_timer.data = (unsigned long)&sci_ports[i];
@@ -1285,7 +1272,7 @@ static int __init serial_console_setup(struct console *co, char *options) 


	port->type = serial_console_port->type;



#if defined(CONFIG_SUPERH) && !defined(CONFIG_SUPERH64)

#ifdef CONFIG_HAVE_CLK

	if (!serial_console_port->clk)

		serial_console_port->clk = clk_get(NULL, "module_clk");

#endif
@@ -1479,7 +1466,7 @@ static int __devinit sci_probe(struct platform_device *dev) 
	kgdb_putchar	= kgdb_sci_putchar;

#endif



#ifdef CONFIG_CPU_FREQ

#if defined(CONFIG_CPU_FREQ) && defined(CONFIG_HAVE_CLK)

	cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER);

	dev_info(&dev->dev, "CPU frequency notifier registered\n");

#endif

drivers/serial/sh-sci.h

+1 −3
Original line number Diff line number Diff line
@@ -793,9 +793,7 @@ static inline int sci_rxd_in(struct uart_port *port) 
#elif defined(CONFIG_CPU_SUBTYPE_SH7723)

#define SCBRR_VALUE(bps, clk) (((clk*2)+16*bps)/(16*bps)-1)

#elif defined(__H8300H__) || defined(__H8300S__)

#define SCBRR_VALUE(bps) (((CONFIG_CPU_CLOCK*1000/32)/bps)-1)

#elif defined(CONFIG_SUPERH64)

#define SCBRR_VALUE(bps) ((current_cpu_data.module_clock+16*bps)/(32*bps)-1)

#define SCBRR_VALUE(bps, clk) (((clk*1000/32)/bps)-1)

#else /* Generic SH */

#define SCBRR_VALUE(bps, clk) ((clk+16*bps)/(32*bps)-1)

#endif

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