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Diffstat (limited to 'arch/arm/plat-mxc/include/mach/dptc.h')
| -rw-r--r-- | arch/arm/plat-mxc/include/mach/dptc.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/include/mach/dptc.h b/arch/arm/plat-mxc/include/mach/dptc.h new file mode 100644 index 000000000000..9f5ee9c6fe5d --- /dev/null +++ b/arch/arm/plat-mxc/include/mach/dptc.h @@ -0,0 +1,186 @@ + +/* + * Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ + +#ifndef __ASM_ARCH_MXC_DPTC_H__ +#define __ASM_ARCH_MXC_DPTC_H__ + +#include <mach/dvfs_dptc_struct.h> + +/*! + * DPTC proc file system entry name + */ +#define PROC_NODE_NAME "dptc" + +int __init init_dptc_controller(dvfs_dptc_params_s *params); + +/*! + * This function enables the DPTC module. this function updates the DPTC + * thresholds, updates the PMIC, unmasks the DPTC interrupt and enables + * the DPTC module + * + * @param params pointer to the DVFS & DPTC driver parameters structure. + * + * @return 0 if DPTC module was enabled else returns -EINVAL. + */ +int start_dptc(dvfs_dptc_params_s *params); +/*! + * This function disables the DPTC module. + * + * @param params pointer to the DVFS & DPTC driver parameters structure. + * + * @return 0 if DPTC module was disabled else returns -EINVAL. + */ +int stop_dptc(dvfs_dptc_params_s *params); +/*! + * This function updates the drivers current working point index. This index is + * used for access the current DTPC table entry and it corresponds to the + * current CPU working point measured by the DPTC hardware. + * + * @param params pointer to the DVFS & DPTC driver parameters structure. + * @param new_wp New working point index value to be set. + * + */ +void set_dptc_wp(dvfs_dptc_params_s *params, int new_wp); +/*! + * This function updates the DPTC threshold registers. + * + * @param dvfs_dptc_tables_ptr pointer to the DPTC translation table. + * @param wp current wp value. + * @param freq_index translation table index of the current CPU + * frequency. + * + */ +void update_dptc_thresholds(dvfs_dptc_tables_s *dptc_tables_ptr, + int wp, int freq_index); +/*! + * This function adds a new entry to the DPTC log buffer. + * + * @param params pointer to the DVFS & DPTC driver parameters structure. + * @param dptc_log pointer to the DPTC log buffer structure. + * @param wp value of the working point index written + * to the log buffer. + * @param freq_index value of the frequency index written to + * the log buffer. + * + * @return number of log buffer entries. + * + */ + +void add_dptc_log_entry(dvfs_dptc_params_s *params, + dptc_log_s *dptc_log, int wp, int freq_index); + +/*! + * This function updates the CPU voltage, produced by PMIC, by calling PMIC + * driver functions. + * + * @param dptc_tables_ptr pointer to the DPTC translation table. + * @param wp current wp value. + */ +void set_pmic_voltage(dvfs_dptc_tables_s *dptc_tables_ptr, int wp); + +/*! + * This function enables the DPTC reference circuits. + * + * @param params pointer to the DVFS & DPTC driver parameters structure. + * @param rc_state each high bit specifies which + * reference circuite to enable. + * @return 0 on success, error code on failure + */ +int enable_ref_circuits(dvfs_dptc_params_s *params, unsigned char rc_state); + +/*! + * This function disables the DPTC reference circuits. + * + * @param params pointer to the DVFS & DPTC driver parameters structure. + * @param rc_state each high bit specifies which + * reference circuite to disable + * @return 0 on success, error code on failure + */ +int disable_ref_circuits(dvfs_dptc_params_s *params, unsigned char rc_state); + +/*! + * This function is the DPTC Interrupt handler. + * This function wakes-up the dptc_workqueue_handler function that handles the + * DPTC interrupt. + */ +void dptc_irq(void); + +/*! + * This function updates the drivers current frequency index.This index is + * used for access the current DTPC table entry and it corresponds to the + * current CPU frequency (each CPU frequency has a separate index number + * according to the loaded DPTC table). + * + * @param params pointer to the DVFS & DPTC driver parameters structure. + * @param freq_index New frequency index value to be set. + * + * @return 0 if the frequency index was updated (the new index is a + * valid index and the DPTC module isn't active) else returns + * -EINVAL. + * + */ +int set_dptc_curr_freq(dvfs_dptc_params_s *params, unsigned int freq_index); + +#ifdef CONFIG_MXC_DVFS_SDMA +/* + * DPTC SDMA callback. + * Updates the PMIC voltage + * + * @param params pointer to the DVFS & DPTC driver parameters structure. + */ +void dptc_sdma_callback(dvfs_dptc_params_s *params); +#endif + +/*! + * This function is called to put the DPTC in a low power state. + * + * @param pdev the device structure used to give information on which + * device to suspend (not relevant for DPTC) + * @param state the power state the device is entering + * + * @return The function always returns 0. + */ +int mxc_dptc_suspend(struct platform_device *pdev, pm_message_t state); + +/*! + * This function is called to put the DPTC in a low power state. + * + */ +void dptc_suspend(void); + +/*! + * This function is called to resume the DPTC from a low power state. + * + * @param pdev the device structure used to give information on which + * device to suspend (not relevant for DPTC) + * + * @return The function always returns 0. + */ +int mxc_dptc_resume(struct platform_device *dev); + +/*! + * This function is called to resume the DPTC from a low power state. + * + */ +void dptc_resume(void); + +/*! + * This function initializes DPTC according to turbo mode status + * + * @param status Turbo mode disable, 1 - turbo mode enabled + * + */ +void dptc_set_turbo_mode(unsigned int status); + +#endif /* __ASM_ARCH_MXC_DPTC_H__ */ |