Blackfin arch: document why we have to touch the UART peripheral in our boot up code
[linux-2.6.git] / arch / blackfin / mach-bf537 / cpu.c
index 2d83b7e..0442c4c 100644 (file)
 #define VCO1 (CONFIG_CLKIN_HZ*9)       /*99532800 */
 #define VCO(x) VCO##x
 
-#define FREQ(x) {VCO(x),VCO(x)/4},{VCO(x),VCO(x)/2},{VCO(x),VCO(x)}
+#define MFREQ(x) {VCO(x),VCO(x)/4},{VCO(x),VCO(x)/2},{VCO(x),VCO(x)}
 /* frequency */
 static struct cpufreq_frequency_table bf537_freq_table[] = {
-       FREQ(1),
-       FREQ(3),
+       MFREQ(1),
+       MFREQ(3),
        {VCO4, VCO4 / 2}, {VCO4, VCO4},
-       FREQ(5),
+       MFREQ(5),
        {0, CPUFREQ_TABLE_END},
 };
 
@@ -59,13 +59,14 @@ static struct cpufreq_frequency_table bf537_freq_table[] = {
  */
 static int bf537_getfreq(unsigned int cpu)
 {
-       unsigned long cclk_mhz, vco_mhz;
+       unsigned long cclk_mhz;
 
        /* The driver only support single cpu */
        if (cpu == 0)
                dpmc_fops.ioctl(NULL, NULL, IOCTL_GET_CORECLOCK, &cclk_mhz);
        else
                cclk_mhz = -1;
+
        return cclk_mhz;
 }
 
@@ -75,13 +76,12 @@ static int bf537_target(struct cpufreq_policy *policy,
        unsigned long cclk_mhz;
        unsigned long vco_mhz;
        unsigned long flags;
-       unsigned int index, vco_index;
-       int i;
-
+       unsigned int index;
        struct cpufreq_freqs freqs;
-       if (cpufreq_frequency_table_target
-           (policy, bf537_freq_table, target_freq, relation, &index))
+
+       if (cpufreq_frequency_table_target(policy, bf537_freq_table, target_freq, relation, &index))
                return -EINVAL;
+
        cclk_mhz = bf537_freq_table[index].frequency;
        vco_mhz = bf537_freq_table[index].index;
 
@@ -114,8 +114,6 @@ static int bf537_verify_speed(struct cpufreq_policy *policy)
 
 static int __init __bf537_cpu_init(struct cpufreq_policy *policy)
 {
-       int result;
-
        if (policy->cpu != 0)
                return -EINVAL;