The calculation of the best divider value for a requested clock rate
always returned a value that was slightly too large. It was also not
protected against possible divisions by zero.
Request for very low, but non zero rates would cause the ACLK divisor
field to overflow. Catch this situation by using the maximum value.
The internal function aclk_set_rate() calculates the correct divider
value, but doesn't write it back to the register. Add the write back.
Signed-off-by: Hans J. Koch <hjk@linutronix.de>
Signed-off-by: Oskar Schirmer <oskar@linutronix.de>
Cc: bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
factorise some generic infrastructure to assist looking up struct clks
for the ARM & SH architecture.
as the code is identical at 99%
put the arch specific code for allocation as example in asm/clkdev.h
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Add the system timer using clockevents with the internal TC32 timer.
This also adds a clocksource using the same timer.
Signed-off-by: "Hans J. Koch" <hjk@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This adds definitions and low-level functions to handle clocks in
TCC8xxx processors.
Signed-off-by: "Hans J. Koch" <hjk@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Hans J. Koch