0dc6e78a3f
This is snapshot of the clock framework files as of msm-3.18
'commit c0b3f609196f ("ARM: dts: msm: Remove GPU mempool
for msm8909")'.
Below is the brief description of the additional changes made:
1. Add COMMON_CLK_MSM config flag for conditional compilation for
some common files used between COMMON_CLK_MSM and COMMON_CLK_QCOM
clock framework files.
2. Add reset controller framework files for BCR operation.
3. Add conditional compilation support for FTRACE clock functions
to maintain compatibility for clock framework based on
COMMON_CLK_MSM and COMMON_CLK_QCOM.
4. Add files for GDSC operation.
Change-Id: Ia5688600ca8e548beb15745d3ce938fdf41f82de
Signed-off-by: Shefali Jain <shefjain@codeaurora.org>
125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
/* Copyright (c) 2009, 2012-2017, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __MACH_CLK_H
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#define __MACH_CLK_H
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#include <linux/notifier.h>
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#define CLKFLAG_INVERT 0x00000001
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#define CLKFLAG_NOINVERT 0x00000002
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#define CLKFLAG_NONEST 0x00000004
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#define CLKFLAG_NORESET 0x00000008
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#define CLKFLAG_RETAIN_PERIPH 0x00000010
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#define CLKFLAG_NORETAIN_PERIPH 0x00000020
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#define CLKFLAG_RETAIN_MEM 0x00000040
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#define CLKFLAG_NORETAIN_MEM 0x00000080
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#define CLKFLAG_SKIP_HANDOFF 0x00000100
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#define CLKFLAG_MIN 0x00000400
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#define CLKFLAG_MAX 0x00000800
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#define CLKFLAG_INIT_DONE 0x00001000
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#define CLKFLAG_INIT_ERR 0x00002000
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#define CLKFLAG_NO_RATE_CACHE 0x00004000
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#define CLKFLAG_MEASURE 0x00008000
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#define CLKFLAG_EPROBE_DEFER 0x00010000
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#define CLKFLAG_PERIPH_OFF_SET 0x00020000
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#define CLKFLAG_PERIPH_OFF_CLEAR 0x00040000
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struct clk_lookup;
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struct clk;
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enum clk_reset_action {
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CLK_RESET_DEASSERT = 0,
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CLK_RESET_ASSERT = 1
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};
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struct clk_src {
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struct clk *src;
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int sel;
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};
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/* Rate is maximum clock rate in Hz */
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int clk_set_max_rate(struct clk *clk, unsigned long rate);
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/* Assert/Deassert reset to a hardware block associated with a clock */
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int clk_reset(struct clk *clk, enum clk_reset_action action);
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/* Set clock-specific configuration parameters */
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int clk_set_flags(struct clk *clk, unsigned long flags);
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/* returns the mux selection index associated with a particular parent */
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int parent_to_src_sel(struct clk_src *parents, int num_parents, struct clk *p);
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/* returns the mux selection index associated with a particular parent */
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int clk_get_parent_sel(struct clk *c, struct clk *parent);
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/**
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* DOC: clk notifier callback types
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*
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* PRE_RATE_CHANGE - called immediately before the clk rate is changed,
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* to indicate that the rate change will proceed. Drivers must
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* immediately terminate any operations that will be affected by the
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* rate change. Callbacks may either return NOTIFY_DONE, NOTIFY_OK,
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* NOTIFY_STOP or NOTIFY_BAD.
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*
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* ABORT_RATE_CHANGE: called if the rate change failed for some reason
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* after PRE_RATE_CHANGE. In this case, all registered notifiers on
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* the clk will be called with ABORT_RATE_CHANGE. Callbacks must
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* always return NOTIFY_DONE or NOTIFY_OK.
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*
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* POST_RATE_CHANGE - called after the clk rate change has successfully
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* completed. Callbacks must always return NOTIFY_DONE or NOTIFY_OK.
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*
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*/
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#define PRE_RATE_CHANGE BIT(0)
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#define POST_RATE_CHANGE BIT(1)
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#define ABORT_RATE_CHANGE BIT(2)
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/**
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* struct msm_clk_notifier - associate a clk with a notifier
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* @clk: struct clk * to associate the notifier with
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* @notifier_head: a blocking_notifier_head for this clk
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* @node: linked list pointers
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*
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* A list of struct clk_notifier is maintained by the notifier code.
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* An entry is created whenever code registers the first notifier on a
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* particular @clk. Future notifiers on that @clk are added to the
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* @notifier_head.
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*/
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struct msm_clk_notifier {
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struct clk *clk;
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struct srcu_notifier_head notifier_head;
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struct list_head node;
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};
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/**
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* struct msm_clk_notifier_data - rate data to pass to the notifier callback
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* @clk: struct clk * being changed
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* @old_rate: previous rate of this clk
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* @new_rate: new rate of this clk
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*
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* For a pre-notifier, old_rate is the clk's rate before this rate
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* change, and new_rate is what the rate will be in the future. For a
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* post-notifier, old_rate and new_rate are both set to the clk's
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* current rate (this was done to optimize the implementation).
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*/
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struct msm_clk_notifier_data {
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struct clk *clk;
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unsigned long old_rate;
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unsigned long new_rate;
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};
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int msm_clk_notif_register(struct clk *clk, struct notifier_block *nb);
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int msm_clk_notif_unregister(struct clk *clk, struct notifier_block *nb);
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#endif
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