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Linux Kernel
3.7.1
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All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
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Linux Kernel
3.7.1
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#include <linux/kernel.h>#include <linux/list.h>#include <linux/errno.h>#include <linux/err.h>#include <linux/delay.h>#include <linux/clk.h>#include <linux/io.h>#include <linux/bitops.h>#include <asm/cpu.h>#include <plat/clock.h>#include <plat/prcm.h>#include <trace/events/power.h>#include "soc.h"#include "clockdomain.h"#include "clock.h"#include "cm2xxx_3xxx.h"#include "cm-regbits-24xx.h"#include "cm-regbits-34xx.h"Go to the source code of this file.
Functions | |
| void | omap2_init_clk_clkdm (struct clk *clk) |
| void __init | omap2_clk_disable_clkdm_control (void) |
| void | omap2_clk_dflt_find_companion (struct clk *clk, void __iomem **other_reg, u8 *other_bit) |
| void | omap2_clk_dflt_find_idlest (struct clk *clk, void __iomem **idlest_reg, u8 *idlest_bit, u8 *idlest_val) |
| int | omap2_dflt_clk_enable (struct clk *clk) |
| void | omap2_dflt_clk_disable (struct clk *clk) |
| void | omap2_clk_disable (struct clk *clk) |
| int | omap2_clk_enable (struct clk *clk) |
| long | omap2_clk_round_rate (struct clk *clk, unsigned long rate) |
| int | omap2_clk_set_rate (struct clk *clk, unsigned long rate) |
| int | omap2_clk_set_parent (struct clk *clk, struct clk *new_parent) |
| int __init | omap2_clk_switch_mpurate_at_boot (const char *mpurate_ck_name) |
| void __init | omap2_clk_print_new_rates (const char *hfclkin_ck_name, const char *core_ck_name, const char *mpu_ck_name) |
Variables | |
| u16 | cpu_mask |
| struct clkops | clkops_omap2_dflt_wait |
| struct clkops | clkops_omap2_dflt |
| struct clk_functions | omap2_clk_functions |
omap2_clk_dflt_find_companion - find companion clock to : struct clk * to find the companion clock of : void __iomem ** to return the companion clock CM_*CLKEN va in : u8 ** to return the companion clock bit shift in
Note: We don't need special code here for INVERT_ENABLE for the time being since INVERT_ENABLE only applies to clocks enabled by CM_CLKEN_PLL
Convert CM_ICLKEN* <-> CM_FCLKEN*. This conversion assumes it's just a matter of XORing the bits.
Some clocks don't have companion clocks. For example, modules with only an interface clock (such as MAILBOXES) don't have a companion clock. Right now, this code relies on the hardware exporting a bit in the correct companion register that indicates that the nonexistent 'companion clock' is active. Future patches will associate this type of code with per-module data structures to avoid this issue, and remove the casts. No return value.
| void omap2_clk_dflt_find_idlest | ( | struct clk * | clk, |
| void __iomem ** | idlest_reg, | ||
| u8 * | idlest_bit, | ||
| u8 * | idlest_val | ||
| ) |
omap2_clk_dflt_find_idlest - find CM_IDLEST reg va, bit shift for : struct clk * to find IDLEST info for : void __iomem ** to return the CM_IDLEST va in : u8 * to return the CM_IDLEST bit shift in : u8 * to return the idle status indicator
Return the CM_IDLEST register address and bit shift corresponding to the module that "owns" this clock. This default code assumes that the CM_IDLEST bit shift is the CM_*CLKEN bit shift, and that the IDLEST register address ID corresponds to the CM_*CLKEN register address ID (e.g., that CM_FCLKEN2 corresponds to CM_IDLEST2). This is not true for all modules. No return value.
omap2_clk_disable - disable a clock, if the system is not using it : struct clk * to disable
Decrements the usecount on struct clk . If there are no users left, call the clkops-specific clock disable function to disable it in hardware. If the clock is part of a clockdomain (which they all should be), request that the clockdomain be disabled. (It too has a usecount, and so will not be disabled in the hardware until it no longer has any users.) If the clock has a parent clock (most of them do), then call ourselves, recursing on the parent clock. This can cause an entire branch of the clock tree to be powered off by simply disabling one clock. Intended to be called with the clockfw_lock spinlock held. No return value.
omap2_clk_enable - request that the system enable a clock : struct clk * to enable
Increments the usecount on struct clk . If there were no users previously, then recurse up the clock tree, enabling all of the clock's parents and all of the parent clockdomains, and finally, enabling 's clockdomain, and itself. Intended to be called with the clockfw_lock spinlock held. Returns 0 upon success or a negative error code upon failure.
| void __init omap2_clk_print_new_rates | ( | const char * | hfclkin_ck_name, |
| const char * | core_ck_name, | ||
| const char * | mpu_ck_name | ||
| ) |
omap2_clk_print_new_rates - print summary of current clock tree rates : clk name for the off-chip HF oscillator : clk name for the on-chip CORE_CLK : clk name for the ARM MPU clock
Prints a short message to the console with the HFCLKIN oscillator rate, the rate of the CORE clock, and the rate of the ARM MPU clock. Called by the boot-time MPU rate switching code. XXX This is intended to be handled by the OPP layer code in the near future and should be removed from the clock code. No return value.
omap2_clk_switch_mpurate_at_boot - switch ARM MPU rate by boot-time argument : clk name of the clock to change rate
Change the ARM MPU clock rate to the rate specified on the command line, if one was specified. should be "virt_prcm_set" on OMAP2xxx and "dpll1_ck" on OMAP34xx/OMAP36xx. XXX Does not handle voltage scaling - on OMAP2xxx this is currently handled by the virt_prcm_set clock, but this should be handled by the OPP layer. XXX This is intended to be handled by the OPP layer code in the near future and should be removed from the clock code. Returns -EINVAL if 'mpurate' is zero or if clk_set_rate() rejects the rate, -ENOENT if the struct clk referred to by cannot be found, or 0 upon success.
omap2_init_clk_clkdm - look up a clockdomain name, store pointer in clk : OMAP clock struct ptr to use
Convert a clockdomain name stored in a struct clk 'clk' into a clockdomain pointer, and save it into the struct clk. Intended to be called during clk_register(). No return value.
| struct clk_functions omap2_clk_functions |
1.8.2