Changeset 4c754f6 in mainline for kernel/genarch/src/drivers/am335x/timer.c

Timestamp:

2013-02-11T22:55:29Z (11 years ago)

Author:

Maurizio Lombardi <m.lombardi85@…>

Branches:

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

Children:

0f66886

Parents:

40762c6

Message:

Improve the dmtimer modules initialization.

File:

• kernel/genarch/src/drivers/am335x/timer.c (modified) (2 diffs)

kernel/genarch/src/drivers/am335x/timer.c

@@ -56 +56 @@
 
 void
-am335x_timer_init(am335x_timer_t *timer, am335x_timer_id_t id, unsigned hz)
+am335x_timer_init(am335x_timer_t *timer, am335x_timer_id_t id, unsigned hz,
+    unsigned srcclk_hz)
 {
         uintptr_t base_addr;
@@ -86 +87 @@
         regs->tclr |= AM335x_TIMER_TCLR_AR_FLAG;
 
-        /* XXX Here we assume that the timer clock source
-         * is running at 32 Khz but this is not always the
-         * case; DMTIMER[2 - 7] can use the internal system 24 Mhz
-         * clock source or an external clock also.
-         */
-        unsigned const count = 0xFFFFFFFE - 32768 / hz;
+        /* Disable the emulation mode */
+        regs->tiocp_cfg |= AM335x_TIMER_TIOCPCFG_EMUFREE_FLAG;
+
+        unsigned const count = 0xFFFFFFFE - (srcclk_hz / hz);
         regs->tcrr = count;
         regs->tldr = count;