1 /* 2 * linux/arch/arm/mach-omap2/clock.h 3 * 4 * Copyright (C) 2005-2008 Texas Instruments, Inc. 5 * Copyright (C) 2004-2008 Nokia Corporation 6 * 7 * Contacts: 8 * Richard Woodruff <r-woodruff2@ti.com> 9 * Paul Walmsley 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 */ 15 16 #ifndef __ARCH_ARM_MACH_OMAP2_CLOCK_H 17 #define __ARCH_ARM_MACH_OMAP2_CLOCK_H 18 19 #include <asm/arch/clock.h> 20 21 /* The maximum error between a target DPLL rate and the rounded rate in Hz */ 22 #define DEFAULT_DPLL_RATE_TOLERANCE 50000 23 24 int omap2_clk_enable(struct clk *clk); 25 void omap2_clk_disable(struct clk *clk); 26 long omap2_clk_round_rate(struct clk *clk, unsigned long rate); 27 int omap2_clk_set_rate(struct clk *clk, unsigned long rate); 28 int omap2_clk_set_parent(struct clk *clk, struct clk *new_parent); 29 int omap2_dpll_rate_tolerance_set(struct clk *clk, unsigned int tolerance); 30 long omap2_dpll_round_rate(struct clk *clk, unsigned long target_rate); 31 32 #ifdef CONFIG_OMAP_RESET_CLOCKS 33 void omap2_clk_disable_unused(struct clk *clk); 34 #else 35 #define omap2_clk_disable_unused NULL 36 #endif 37 38 void omap2_clksel_recalc(struct clk *clk); 39 void omap2_init_clksel_parent(struct clk *clk); 40 u32 omap2_clksel_get_divisor(struct clk *clk); 41 u32 omap2_clksel_round_rate_div(struct clk *clk, unsigned long target_rate, 42 u32 *new_div); 43 u32 omap2_clksel_to_divisor(struct clk *clk, u32 field_val); 44 u32 omap2_divisor_to_clksel(struct clk *clk, u32 div); 45 void omap2_fixed_divisor_recalc(struct clk *clk); 46 long omap2_clksel_round_rate(struct clk *clk, unsigned long target_rate); 47 int omap2_clksel_set_rate(struct clk *clk, unsigned long rate); 48 u32 omap2_get_dpll_rate(struct clk *clk); 49 int omap2_wait_clock_ready(void __iomem *reg, u32 cval, const char *name); 50 void omap2_clk_prepare_for_reboot(void); 51 52 extern u8 cpu_mask; 53 54 /* clksel_rate data common to 24xx/343x */ 55 static const struct clksel_rate gpt_32k_rates[] = { 56 { .div = 1, .val = 0, .flags = RATE_IN_24XX | RATE_IN_343X | DEFAULT_RATE }, 57 { .div = 0 } 58 }; 59 60 static const struct clksel_rate gpt_sys_rates[] = { 61 { .div = 1, .val = 1, .flags = RATE_IN_24XX | RATE_IN_343X | DEFAULT_RATE }, 62 { .div = 0 } 63 }; 64 65 static const struct clksel_rate gfx_l3_rates[] = { 66 { .div = 1, .val = 1, .flags = RATE_IN_24XX | RATE_IN_343X }, 67 { .div = 2, .val = 2, .flags = RATE_IN_24XX | RATE_IN_343X | DEFAULT_RATE }, 68 { .div = 3, .val = 3, .flags = RATE_IN_243X | RATE_IN_343X }, 69 { .div = 4, .val = 4, .flags = RATE_IN_243X | RATE_IN_343X }, 70 { .div = 0 } 71 }; 72 73 74 #endif 75