2015-02-25 11:56:02 +08:00
|
|
|
/*
|
|
|
|
* Copyright (C) 2014 Google, Inc.
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
|
|
* under the terms and conditions of the GNU General Public License,
|
|
|
|
* version 2, as published by the Free Software Foundation.
|
|
|
|
*/
|
|
|
|
|
2015-07-10 06:24:51 +08:00
|
|
|
#include <linux/clk.h>
|
2015-02-25 11:56:02 +08:00
|
|
|
#include <linux/clk-provider.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/of.h>
|
|
|
|
#include <linux/of_address.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
|
|
|
|
#include "clk.h"
|
|
|
|
|
|
|
|
struct pistachio_clk_provider *
|
|
|
|
pistachio_clk_alloc_provider(struct device_node *node, unsigned int num_clks)
|
|
|
|
{
|
|
|
|
struct pistachio_clk_provider *p;
|
|
|
|
|
|
|
|
p = kzalloc(sizeof(*p), GFP_KERNEL);
|
|
|
|
if (!p)
|
|
|
|
return p;
|
|
|
|
|
|
|
|
p->clk_data.clks = kcalloc(num_clks, sizeof(struct clk *), GFP_KERNEL);
|
|
|
|
if (!p->clk_data.clks)
|
|
|
|
goto free_provider;
|
|
|
|
p->clk_data.clk_num = num_clks;
|
|
|
|
p->node = node;
|
|
|
|
p->base = of_iomap(node, 0);
|
|
|
|
if (!p->base) {
|
|
|
|
pr_err("Failed to map clock provider registers\n");
|
|
|
|
goto free_clks;
|
|
|
|
}
|
|
|
|
|
|
|
|
return p;
|
|
|
|
|
|
|
|
free_clks:
|
|
|
|
kfree(p->clk_data.clks);
|
|
|
|
free_provider:
|
|
|
|
kfree(p);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
void pistachio_clk_register_provider(struct pistachio_clk_provider *p)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < p->clk_data.clk_num; i++) {
|
|
|
|
if (IS_ERR(p->clk_data.clks[i]))
|
|
|
|
pr_warn("Failed to register clock %d: %ld\n", i,
|
|
|
|
PTR_ERR(p->clk_data.clks[i]));
|
|
|
|
}
|
|
|
|
|
|
|
|
of_clk_add_provider(p->node, of_clk_src_onecell_get, &p->clk_data);
|
|
|
|
}
|
|
|
|
|
|
|
|
void pistachio_clk_register_gate(struct pistachio_clk_provider *p,
|
|
|
|
struct pistachio_gate *gate,
|
|
|
|
unsigned int num)
|
|
|
|
{
|
|
|
|
struct clk *clk;
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < num; i++) {
|
|
|
|
clk = clk_register_gate(NULL, gate[i].name, gate[i].parent,
|
|
|
|
CLK_SET_RATE_PARENT,
|
|
|
|
p->base + gate[i].reg, gate[i].shift,
|
|
|
|
0, NULL);
|
|
|
|
p->clk_data.clks[gate[i].id] = clk;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void pistachio_clk_register_mux(struct pistachio_clk_provider *p,
|
|
|
|
struct pistachio_mux *mux,
|
|
|
|
unsigned int num)
|
|
|
|
{
|
|
|
|
struct clk *clk;
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < num; i++) {
|
|
|
|
clk = clk_register_mux(NULL, mux[i].name, mux[i].parents,
|
|
|
|
mux[i].num_parents,
|
|
|
|
CLK_SET_RATE_NO_REPARENT,
|
|
|
|
p->base + mux[i].reg, mux[i].shift,
|
|
|
|
get_count_order(mux[i].num_parents),
|
|
|
|
0, NULL);
|
|
|
|
p->clk_data.clks[mux[i].id] = clk;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void pistachio_clk_register_div(struct pistachio_clk_provider *p,
|
|
|
|
struct pistachio_div *div,
|
|
|
|
unsigned int num)
|
|
|
|
{
|
|
|
|
struct clk *clk;
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < num; i++) {
|
|
|
|
clk = clk_register_divider(NULL, div[i].name, div[i].parent,
|
|
|
|
0, p->base + div[i].reg, 0,
|
|
|
|
div[i].width, div[i].div_flags,
|
|
|
|
NULL);
|
|
|
|
p->clk_data.clks[div[i].id] = clk;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void pistachio_clk_register_fixed_factor(struct pistachio_clk_provider *p,
|
|
|
|
struct pistachio_fixed_factor *ff,
|
|
|
|
unsigned int num)
|
|
|
|
{
|
|
|
|
struct clk *clk;
|
|
|
|
unsigned int i;
|
|
|
|
|
|
|
|
for (i = 0; i < num; i++) {
|
|
|
|
clk = clk_register_fixed_factor(NULL, ff[i].name, ff[i].parent,
|
|
|
|
0, 1, ff[i].div);
|
|
|
|
p->clk_data.clks[ff[i].id] = clk;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
void pistachio_clk_force_enable(struct pistachio_clk_provider *p,
|
|
|
|
unsigned int *clk_ids, unsigned int num)
|
|
|
|
{
|
|
|
|
unsigned int i;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
for (i = 0; i < num; i++) {
|
|
|
|
struct clk *clk = p->clk_data.clks[clk_ids[i]];
|
|
|
|
|
|
|
|
if (IS_ERR(clk))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
err = clk_prepare_enable(clk);
|
|
|
|
if (err)
|
|
|
|
pr_err("Failed to enable clock %s: %d\n",
|
|
|
|
__clk_get_name(clk), err);
|
|
|
|
}
|
|
|
|
}
|