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Diffstat (limited to 'arch/arm/mach-ux500/clock.c')
-rw-r--r--arch/arm/mach-ux500/clock.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/clock.c b/arch/arm/mach-ux500/clock.c
index 7d107be63eb4..e832664d1bd9 100644
--- a/arch/arm/mach-ux500/clock.c
+++ b/arch/arm/mach-ux500/clock.c
@@ -14,6 +14,7 @@
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/clkdev.h>
+#include <linux/cpufreq.h>
#include <plat/mtu.h>
#include <mach/hardware.h>
@@ -742,6 +743,51 @@ err_out:
late_initcall(clk_debugfs_init);
#endif /* defined(CONFIG_DEBUG_FS) */
+unsigned long clk_smp_twd_rate = 400000000;
+
+unsigned long clk_smp_twd_get_rate(struct clk *clk)
+{
+ return clk_smp_twd_rate;
+}
+
+static struct clk clk_smp_twd = {
+ .get_rate = clk_smp_twd_get_rate,
+ .name = "smp_twd",
+};
+
+static struct clk_lookup clk_smp_twd_lookup = {
+ .dev_id = "smp_twd",
+ .clk = &clk_smp_twd,
+};
+
+#ifdef CONFIG_CPU_FREQ
+
+static int clk_twd_cpufreq_transition(struct notifier_block *nb,
+ unsigned long state, void *data)
+{
+ struct cpufreq_freqs *f = data;
+
+ if (state == CPUFREQ_PRECHANGE) {
+ /* Save frequency in simple Hz */
+ clk_smp_twd_rate = f->new * 1000;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block clk_twd_cpufreq_nb = {
+ .notifier_call = clk_twd_cpufreq_transition,
+};
+
+static int clk_init_smp_twd_cpufreq(void)
+{
+ return cpufreq_register_notifier(&clk_twd_cpufreq_nb,
+ CPUFREQ_TRANSITION_NOTIFIER);
+}
+late_initcall(clk_init_smp_twd_cpufreq);
+
+#endif
+
int __init clk_init(void)
{
if (cpu_is_u8500ed()) {
@@ -762,6 +808,8 @@ int __init clk_init(void)
else
clkdev_add_table(u8500_v1_clks, ARRAY_SIZE(u8500_v1_clks));
+ clkdev_add(&clk_smp_twd_lookup);
+
#ifdef CONFIG_DEBUG_FS
clk_debugfs_add_table(u8500_common_clks, ARRAY_SIZE(u8500_common_clks));
if (cpu_is_u8500ed())