Changeset e3e2b6c7 in mainline

Timestamp:

2013-02-10T22:20:02Z (11 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

40762c6

Parents:

ed0a9c5

Message:

add a function to get the sys clock frequency

File:

• kernel/genarch/include/drivers/am335x/ctrl_module.h (modified) (1 diff)

kernel/genarch/include/drivers/am335x/ctrl_module.h

@@ -42 +42 @@
 #define AM335x_CTRL_MODULE_SIZE          131072 /* 128 Kb */
 
+static unsigned am335x_ctrl_module_clock_freq_get(void *base)
+{
+        unsigned const control_status = AM335x_CTRL_MODULE_REG_ADDR(base,
+            CONTROL_SYSCONFIG);
+        unsigned const sysboot = (control_status >> 22) & 0x03;
+
+        switch (sysboot) {
+        default:
+        case 0:
+                return 19200000; /* 19.2 Mhz */
+        case 1:
+                return 24000000; /* 24 Mhz */
+        case 2:
+                return 25000000; /* 25 Mhz */
+        case 3:
+                return 26000000; /* 26 Mhz */
+        }
+}
+
 #endif