ARM: 7087/2: mach-integrator: get timer frequency from clock

We already have a clock definition for the 24MHz clock in
the Integrator, use that instead of some unclear defines
from the platform.h header. Also delete the senseless
comment that the file shouldn't be edited, I just edited it
and the world didn't come to an end, so it's obviously
false. If anyone still has the mentioned ".s file" and the
s2h awk script generating that header, raise your hand
(and give me your files).

Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-integrator/core.c b/arch/arm/mach-integrator/core.c
index 77315b995681c01170ad13344d4b3be79a3f1e3b..82ebc8d772d39d980089d9eed04fa33472e8520e 100644 (file)
--- a/arch/arm/mach-integrator/core.c
+++ b/arch/arm/mach-integrator/core.c
@@ -126,6 +126,10 @@ static struct clk_lookup lookups[] = {
        {       /* Bus clock */
                .con_id         = "apb_pclk",
                .clk            = &dummy_apb_pclk,
+       }, {
+               /* Integrator/AP timer frequency */
+               .dev_id         = "ap_timer",
+               .clk            = &clk24mhz,
        }, {    /* UART0 */
                .dev_id         = "mb:16",
                .clk            = &uartclk,

diff --git a/arch/arm/mach-integrator/include/mach/platform.h b/arch/arm/mach-integrator/include/mach/platform.h
index 5e6ea5cfea6ebb79e4c9cef42952ee665e91e2d1..ec467baade097c5ebcadc1699a879e7758b2874a 100644 (file)
--- a/arch/arm/mach-integrator/include/mach/platform.h
+++ b/arch/arm/mach-integrator/include/mach/platform.h
@@ -13,9 +13,6 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
-/* DO NOT EDIT!! - this file automatically generated
- *                 from .s file by awk -f s2h.awk
- */
 /**************************************************************************
  * * Copyright © ARM Limited 1998.  All rights reserved.
  * ***********************************************************************/
@@ -399,15 +396,6 @@
 #define INTEGRATOR_TIMER1_BASE          (INTEGRATOR_CT_BASE + 0x100)
 #define INTEGRATOR_TIMER2_BASE          (INTEGRATOR_CT_BASE + 0x200)
 
-#define TICKS_PER_uSEC                  24
-
-/*
- *  These are useconds NOT ticks.
- *
- */
-#define mSEC_1                          1000
-#define mSEC_10                         (mSEC_1 * 10)
-
 #define INTEGRATOR_CSR_BASE             0x10000000
 #define INTEGRATOR_CSR_SIZE             0x10000000
 

diff --git a/arch/arm/mach-integrator/integrator_ap.c b/arch/arm/mach-integrator/integrator_ap.c
index 0a6f397f122239b449a1a8fcc1a1a116a94db496..8dca5a7ab370f5ee29314351887fae7164c5f6c7 100644 (file)
--- a/arch/arm/mach-integrator/integrator_ap.c
+++ b/arch/arm/mach-integrator/integrator_ap.c
@@ -32,6 +32,7 @@
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/mtd/physmap.h>
+#include <linux/clk.h>
 
 #include <mach/hardware.h>
 #include <mach/platform.h>
@@ -322,13 +323,14 @@ static void __init ap_init(void)
 
 static unsigned long timer_reload;
 
-static void integrator_clocksource_init(u32 khz)
+static void integrator_clocksource_init(unsigned long inrate)
 {
        void __iomem *base = (void __iomem *)TIMER2_VA_BASE;
        u32 ctrl = TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC;
+       unsigned long rate = inrate;
 
-       if (khz >= 1500) {
-               khz /= 16;
+       if (rate >= 1500000) {
+               rate /= 16;
                ctrl |= TIMER_CTRL_DIV16;
        }
 
@@ -336,7 +338,7 @@ static void integrator_clocksource_init(u32 khz)
        writel(ctrl, base + TIMER_CTRL);
 
        clocksource_mmio_init(base + TIMER_VALUE, "timer2",
-               khz * 1000, 200, 16, clocksource_mmio_readl_down);
+                       rate, 200, 16, clocksource_mmio_readl_down);
 }
 
 static void __iomem * const clkevt_base = (void __iomem *)TIMER1_VA_BASE;
@@ -411,24 +413,25 @@ static struct irqaction integrator_timer_irq = {
        .dev_id         = &integrator_clockevent,
 };
 
-static void integrator_clockevent_init(u32 khz)
+static void integrator_clockevent_init(unsigned long inrate)
 {
+       unsigned long rate = inrate;
        unsigned int ctrl = 0;
 
        /* Calculate and program a divisor */
-       if (khz * 1000 > 0x100000 * HZ) {
-               khz /= 256;
+       if (rate > 0x100000 * HZ) {
+               rate /= 256;
                ctrl |= TIMER_CTRL_DIV256;
-       } else if (khz * 1000 > 0x10000 * HZ) {
-               khz /= 16;
+       } else if (rate > 0x10000 * HZ) {
+               rate /= 16;
                ctrl |= TIMER_CTRL_DIV16;
        }
-       timer_reload = khz * 1000 / HZ;
+       timer_reload = rate / HZ;
        writel(ctrl, clkevt_base + TIMER_CTRL);
 
        setup_irq(IRQ_TIMERINT1, &integrator_timer_irq);
        clockevents_config_and_register(&integrator_clockevent,
-                                       khz * 1000,
+                                       rate,
                                        1,
                                        0xffffU);
 }
@@ -438,14 +441,20 @@ static void integrator_clockevent_init(u32 khz)
  */
 static void __init ap_init_timer(void)
 {
-       u32 khz = TICKS_PER_uSEC * 1000;
+       struct clk *clk;
+       unsigned long rate;
+
+       clk = clk_get_sys("ap_timer", NULL);
+       BUG_ON(IS_ERR(clk));
+       clk_enable(clk);
+       rate = clk_get_rate(clk);
 
        writel(0, TIMER0_VA_BASE + TIMER_CTRL);
        writel(0, TIMER1_VA_BASE + TIMER_CTRL);
        writel(0, TIMER2_VA_BASE + TIMER_CTRL);
 
-       integrator_clocksource_init(khz);
-       integrator_clockevent_init(khz);
+       integrator_clocksource_init(rate);
+       integrator_clockevent_init(rate);
 }
 
 static struct sys_timer ap_timer = {