Add 1.2GHz cpu clock support for T25

arch/arm/mach-tegra/cpu-tegra.c

 /*
  * arch/arm/mach-tegra/cpu-tegra.c
  *
  * Copyright (C) 2010 Google, Inc.
  *
  * Author:
  *      Colin Cross <ccross@google.com>
  *      Based on arch/arm/plat-omap/cpu-omap.c, (C) 2005 Nokia Corporation
  *
  * This software is licensed under the terms of the GNU General Public
@@ skipping 18 matching lines @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/suspend.h>
 
 #include <asm/smp_twd.h>
 #include <asm/system.h>
 
 #include <mach/hardware.h>
 #include <mach/clk.h>
 
+#include "fuse.h"
+
+#define SKU_ID_T20      0x08
+#define SKU_ID_T25      0x18
+
 /* Frequency table index must be sequential starting at 0 */
-static struct cpufreq_frequency_table freq_table[] = {
+static struct cpufreq_frequency_table freq_table_t20[] = {
         { 0, 216000 },
         { 1, 312000 },
         { 2, 456000 },
         { 3, 608000 },
         { 4, 760000 },
         { 5, 816000 },
         { 6, 912000 },
         { 7, 1000000 },
         { 8, CPUFREQ_TABLE_END },
 };
 
+static struct cpufreq_frequency_table freq_table_t25[] = {
+        { 0, 216000 },
+        { 1, 312000 },
+        { 2, 456000 },
+        { 3, 608000 },
+        { 4, 760000 },
+        { 5, 816000 },
+        { 6, 912000 },
+        { 7, 1000000 },
+        { 8, 1200000 },
+        { 9, CPUFREQ_TABLE_END },
+};
+
+static struct cpufreq_frequency_table *freq_table;
+
 #define NUM_CPUS        2
 
 static struct clk *cpu_clk;
 
 static unsigned long target_cpu_speed[NUM_CPUS];
 static DEFINE_MUTEX(tegra_cpu_lock);
 static bool is_suspended;
 
 int tegra_verify_speed(struct cpufreq_policy *policy)
 {
@@ skipping 123 matching lines @@
 
 static struct notifier_block tegra_cpu_pm_notifier = {
         .notifier_call = tegra_pm_notify,
 };
 
 static int tegra_cpu_init(struct cpufreq_policy *policy)
 {
         if (policy->cpu >= NUM_CPUS)
                 return -EINVAL;
 
+        freq_table = (tegra_sku_id() == SKU_ID_T25) ? freq_table_t25 : 
+                        freq_table_t20;

[Olof Johansson, 2011/01/12 01:05:28]

I would prefer to see this as a regular if/else.

[jimmzhang, 2011/01/12 01:22:56]

Sure, I can change it to that way.

+
         cpu_clk = clk_get_sys(NULL, "cpu");
         if (IS_ERR(cpu_clk))
                 return PTR_ERR(cpu_clk);
 
         cpufreq_frequency_table_cpuinfo(policy, freq_table);
         cpufreq_frequency_table_get_attr(freq_table, policy->cpu);
         policy->cur = tegra_getspeed(policy->cpu);
         target_cpu_speed[policy->cpu] = policy->cur;
 
         /* FIXME: what's the actual transition time? */
@@ skipping 39 matching lines @@
 {
         cpufreq_unregister_driver(&tegra_cpufreq_driver);
 }
 
 
 MODULE_AUTHOR("Colin Cross <ccross@android.com>");
 MODULE_DESCRIPTION("cpufreq driver for Nvidia Tegra2");
 MODULE_LICENSE("GPL");
 module_init(tegra_cpufreq_init);
 module_exit(tegra_cpufreq_exit);