[ARM] S3C: Update time initialisation to fix S3C64XX time problems

The S3C64XX timer is running at the wrong rate due to the
assumptions made in the timer initialisation about the way
the pwm dividers work. This means that time on the S3C64XX
runs twice as fast as it should.

Fix the problem by moving to using the clk framework to setup
the pwm timer clock muxes, as the pwm-clock code has all the
necessary knowledge of how the timer clock inputs are routed.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 15 insertions, 13 deletions

diff --git a/arch/arm/plat-s3c/pwm-clock.c b/arch/arm/plat-s3c/pwm-clock.c
index 988c0cd7ade2..a318215ab535 100644
--- a/arch/arm/plat-s3c/pwm-clock.c
+++ b/arch/arm/plat-s3c/pwm-clock.c
@@ -407,7 +407,16 @@ static __init int clk_pwm_tin_register(struct clk *pwm)
         return clk_set_parent(pwm, parent);
 }
 
-static __init int s3c24xx_pwmclk_init(void)
+/**
+ * s3c_pwmclk_init() - initialise pwm clocks
+ *
+ * Initialise and register the clocks which provide the inputs for the
+ * pwm timer blocks.
+ *
+ * Note, this call is required by the time core, so must be called after
+ * the base clocks are added and before any of the initcalls are run.
+ */
+__init void s3c_pwmclk_init(void)
 {
         struct clk *clk_timers;
         unsigned int clk;
@@ -416,7 +425,7 @@ static __init int s3c24xx_pwmclk_init(void)
         clk_timers = clk_get(NULL, "timers");
         if (IS_ERR(clk_timers)) {
                 printk(KERN_ERR "%s: no parent clock\n", __func__);
-                return -EINVAL;
+                return;
         }
 
         for (clk = 0; clk < ARRAY_SIZE(clk_timer_scaler); clk++) {
@@ -424,7 +433,7 @@ static __init int s3c24xx_pwmclk_init(void)
                 ret = s3c24xx_register_clock(&clk_timer_scaler[clk]);
                 if (ret < 0) {
                         printk(KERN_ERR "error adding pwm scaler%d clock\n", clk);
-                        goto err;
+                        return;
                 }
         }
 
@@ -432,7 +441,7 @@ static __init int s3c24xx_pwmclk_init(void)
                 ret = s3c24xx_register_clock(&clk_timer_tclk[clk]);
                 if (ret < 0) {
                         printk(KERN_ERR "error adding pww tclk%d\n", clk);
-                        goto err;
+                        return;
                 }
         }
 
@@ -440,7 +449,7 @@ static __init int s3c24xx_pwmclk_init(void)
                 ret = clk_pwm_tdiv_register(clk);
                 if (ret < 0) {
                         printk(KERN_ERR "error adding pwm%d tdiv clock\n", clk);
-                        goto err;
+                        return;
                 }
         }
 
@@ -448,14 +457,7 @@ static __init int s3c24xx_pwmclk_init(void)
                 ret = clk_pwm_tin_register(&clk_tin[clk]);
                 if (ret < 0) {
                         printk(KERN_ERR "error adding pwm%d tin clock\n", clk);
-                        goto err;
+                        return;
                 }
         }
-
-        return 0;
-
- err:
-        return ret;
 }
-
-arch_initcall(s3c24xx_pwmclk_init);