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- /* linux/arch/arm/plat-s3c24xx/pwm-clock.c
- *
- * Copyright (c) 2007 Simtec Electronics
- * Copyright (c) 2007, 2008 Ben Dooks
- * Ben Dooks <ben-linux@fluff.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License.
- */
- #include <linux/init.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/list.h>
- #include <linux/errno.h>
- #include <linux/log2.h>
- #include <linux/clk.h>
- #include <linux/err.h>
- #include <linux/io.h>
- #include <mach/hardware.h>
- #include <mach/map.h>
- #include <asm/irq.h>
- #include <plat/clock.h>
- #include <plat/cpu.h>
- #include <plat/regs-timer.h>
- #include <plat/pwm-clock.h>
- /* Each of the timers 0 through 5 go through the following
- * clock tree, with the inputs depending on the timers.
- *
- * pclk ---- [ prescaler 0 ] -+---> timer 0
- * +---> timer 1
- *
- * pclk ---- [ prescaler 1 ] -+---> timer 2
- * +---> timer 3
- * \---> timer 4
- *
- * Which are fed into the timers as so:
- *
- * prescaled 0 ---- [ div 2,4,8,16 ] ---\
- * [mux] -> timer 0
- * tclk 0 ------------------------------/
- *
- * prescaled 0 ---- [ div 2,4,8,16 ] ---\
- * [mux] -> timer 1
- * tclk 0 ------------------------------/
- *
- *
- * prescaled 1 ---- [ div 2,4,8,16 ] ---\
- * [mux] -> timer 2
- * tclk 1 ------------------------------/
- *
- * prescaled 1 ---- [ div 2,4,8,16 ] ---\
- * [mux] -> timer 3
- * tclk 1 ------------------------------/
- *
- * prescaled 1 ---- [ div 2,4,8, 16 ] --\
- * [mux] -> timer 4
- * tclk 1 ------------------------------/
- *
- * Since the mux and the divider are tied together in the
- * same register space, it is impossible to set the parent
- * and the rate at the same time. To avoid this, we add an
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