| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667 | /* 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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