| /* |
| * Copyright (c) 2012, 2014-2015, The Linux Foundation. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * * Neither the name of The Linux Foundation nor |
| * the names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior written |
| * permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <stdint.h> |
| #include <debug.h> |
| #include <reg.h> |
| #include <err.h> |
| #include <limits.h> |
| #include <bits.h> |
| #include <clock.h> |
| #include <string.h> |
| |
| static struct clk_list msm_clk_list; |
| |
| int clk_set_parent(struct clk *clk, struct clk *parent) |
| { |
| if (!clk->ops->set_parent) |
| return 0; |
| |
| return clk->ops->set_parent(clk, parent); |
| } |
| |
| struct clk *clk_get_parent(struct clk *clk) |
| { |
| if (!clk->ops->get_parent) |
| return NULL; |
| |
| return clk->ops->get_parent(clk); |
| } |
| |
| int clk_reset(struct clk *clk, enum clk_reset_action action) |
| { |
| if (!clk) |
| return 0; |
| |
| if (!clk->ops->reset) |
| return 0; |
| |
| return clk->ops->reset(clk, action); |
| } |
| |
| /* |
| * Standard clock functions defined in include/clk.h |
| */ |
| int clk_enable(struct clk *clk) |
| { |
| int ret = 0; |
| struct clk *parent; |
| |
| if (!clk) |
| return 0; |
| |
| if (clk->count == 0) { |
| parent = clk_get_parent(clk); |
| ret = clk_enable(parent); |
| if (ret) |
| goto out; |
| |
| if (clk->ops->enable) |
| ret = clk->ops->enable(clk); |
| if (ret) { |
| clk_disable(parent); |
| goto out; |
| } |
| } |
| clk->count++; |
| out: |
| return ret; |
| } |
| |
| void clk_disable(struct clk *clk) |
| { |
| struct clk *parent; |
| |
| if (!clk) |
| return; |
| |
| if (clk->count == 0) |
| goto out; |
| if (clk->count == 1) { |
| if (clk->ops->disable) |
| clk->ops->disable(clk); |
| parent = clk_get_parent(clk); |
| clk_disable(parent); |
| } |
| clk->count--; |
| out: |
| return; |
| } |
| |
| unsigned long clk_get_rate(struct clk *clk) |
| { |
| if (!clk->ops->get_rate) |
| return 0; |
| |
| return clk->ops->get_rate(clk); |
| } |
| |
| int clk_set_rate(struct clk *clk, unsigned long rate) |
| { |
| if (!clk->ops->set_rate) |
| return ERR_NOT_VALID; |
| |
| return clk->ops->set_rate(clk, rate); |
| } |
| |
| void clk_init(struct clk_lookup *clist, unsigned num) |
| { |
| if(clist && num) |
| { |
| msm_clk_list.clist = (struct clk_lookup *)clist; |
| msm_clk_list.num = num; |
| } |
| } |
| |
| struct clk *clk_get (const char * cid) |
| { |
| unsigned i; |
| struct clk_lookup *cl= msm_clk_list.clist; |
| unsigned num = msm_clk_list.num; |
| |
| if(!cl || !num) |
| { |
| dprintf (CRITICAL, "Alert!! clock list not defined!\n"); |
| return NULL; |
| } |
| for(i=0; i < num; i++, cl++) |
| { |
| if(!strcmp(cl->con_id, cid)) |
| { |
| return cl->clk; |
| } |
| } |
| |
| dprintf(CRITICAL, "Alert!! Requested clock \"%s\" is not supported!\n", cid); |
| return NULL; |
| } |
| |
| int clk_get_set_enable(char *id, unsigned long rate, bool enable) |
| { |
| int ret = NO_ERROR; |
| struct clk *cp; |
| |
| /* Get clk */ |
| cp = clk_get(id); |
| if(!cp) |
| { |
| dprintf(CRITICAL, "Can't find clock with id: %s\n", id); |
| ret = ERR_NOT_VALID; |
| goto get_set_enable_error; |
| } |
| |
| /* Set rate */ |
| if(rate) |
| { |
| ret = clk_set_rate(cp, rate); |
| if(ret) |
| { |
| dprintf(CRITICAL, "Clock set rate failed.\n"); |
| goto get_set_enable_error; |
| } |
| } |
| |
| /* Enable clock */ |
| if(enable) |
| { |
| ret = clk_enable(cp); |
| if(ret) |
| { |
| dprintf(CRITICAL, "Clock enable failed.\n"); |
| } |
| } |
| |
| get_set_enable_error: |
| return ret; |
| } |
| |
| #ifdef DEBUG_CLOCK |
| struct clk_list *clk_get_list() |
| { |
| return &msm_clk_list; |
| } |
| #endif |