mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 07:45:06 +07:00
6cec90826e
Fixes the below compilation error during non-dt build.
drivers/clk/samsung/clk.c: In function 'samsung_clk_of_register_fixed_ext':
drivers/clk/samsung/clk.c:252:2: error: implicit declaration of function 'for_each_matching_node_and_match' [-Werror=implicit-function-declaration]
drivers/clk/samsung/clk.c:252:60: error: expected ';' before '{' token
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
321 lines
8.1 KiB
C
321 lines
8.1 KiB
C
/*
|
|
* Copyright (c) 2013 Samsung Electronics Co., Ltd.
|
|
* Copyright (c) 2013 Linaro Ltd.
|
|
* Author: Thomas Abraham <thomas.ab@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This file includes utility functions to register clocks to common
|
|
* clock framework for Samsung platforms.
|
|
*/
|
|
|
|
#include <linux/syscore_ops.h>
|
|
#include "clk.h"
|
|
|
|
static DEFINE_SPINLOCK(lock);
|
|
static struct clk **clk_table;
|
|
static void __iomem *reg_base;
|
|
#ifdef CONFIG_OF
|
|
static struct clk_onecell_data clk_data;
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static struct samsung_clk_reg_dump *reg_dump;
|
|
static unsigned long nr_reg_dump;
|
|
|
|
static int samsung_clk_suspend(void)
|
|
{
|
|
struct samsung_clk_reg_dump *rd = reg_dump;
|
|
unsigned long i;
|
|
|
|
for (i = 0; i < nr_reg_dump; i++, rd++)
|
|
rd->value = __raw_readl(reg_base + rd->offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void samsung_clk_resume(void)
|
|
{
|
|
struct samsung_clk_reg_dump *rd = reg_dump;
|
|
unsigned long i;
|
|
|
|
for (i = 0; i < nr_reg_dump; i++, rd++)
|
|
__raw_writel(rd->value, reg_base + rd->offset);
|
|
}
|
|
|
|
static struct syscore_ops samsung_clk_syscore_ops = {
|
|
.suspend = samsung_clk_suspend,
|
|
.resume = samsung_clk_resume,
|
|
};
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
/* setup the essentials required to support clock lookup using ccf */
|
|
void __init samsung_clk_init(struct device_node *np, void __iomem *base,
|
|
unsigned long nr_clks, unsigned long *rdump,
|
|
unsigned long nr_rdump, unsigned long *soc_rdump,
|
|
unsigned long nr_soc_rdump)
|
|
{
|
|
reg_base = base;
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
if (rdump && nr_rdump) {
|
|
unsigned int idx;
|
|
reg_dump = kzalloc(sizeof(struct samsung_clk_reg_dump)
|
|
* (nr_rdump + nr_soc_rdump), GFP_KERNEL);
|
|
if (!reg_dump) {
|
|
pr_err("%s: memory alloc for register dump failed\n",
|
|
__func__);
|
|
return;
|
|
}
|
|
|
|
for (idx = 0; idx < nr_rdump; idx++)
|
|
reg_dump[idx].offset = rdump[idx];
|
|
for (idx = 0; idx < nr_soc_rdump; idx++)
|
|
reg_dump[nr_rdump + idx].offset = soc_rdump[idx];
|
|
nr_reg_dump = nr_rdump + nr_soc_rdump;
|
|
register_syscore_ops(&samsung_clk_syscore_ops);
|
|
}
|
|
#endif
|
|
|
|
clk_table = kzalloc(sizeof(struct clk *) * nr_clks, GFP_KERNEL);
|
|
if (!clk_table)
|
|
panic("could not allocate clock lookup table\n");
|
|
|
|
if (!np)
|
|
return;
|
|
|
|
#ifdef CONFIG_OF
|
|
clk_data.clks = clk_table;
|
|
clk_data.clk_num = nr_clks;
|
|
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
|
|
#endif
|
|
}
|
|
|
|
/* add a clock instance to the clock lookup table used for dt based lookup */
|
|
void samsung_clk_add_lookup(struct clk *clk, unsigned int id)
|
|
{
|
|
if (clk_table && id)
|
|
clk_table[id] = clk;
|
|
}
|
|
|
|
/* register a list of aliases */
|
|
void __init samsung_clk_register_alias(struct samsung_clock_alias *list,
|
|
unsigned int nr_clk)
|
|
{
|
|
struct clk *clk;
|
|
unsigned int idx, ret;
|
|
|
|
if (!clk_table) {
|
|
pr_err("%s: clock table missing\n", __func__);
|
|
return;
|
|
}
|
|
|
|
for (idx = 0; idx < nr_clk; idx++, list++) {
|
|
if (!list->id) {
|
|
pr_err("%s: clock id missing for index %d\n", __func__,
|
|
idx);
|
|
continue;
|
|
}
|
|
|
|
clk = clk_table[list->id];
|
|
if (!clk) {
|
|
pr_err("%s: failed to find clock %d\n", __func__,
|
|
list->id);
|
|
continue;
|
|
}
|
|
|
|
ret = clk_register_clkdev(clk, list->alias, list->dev_name);
|
|
if (ret)
|
|
pr_err("%s: failed to register lookup %s\n",
|
|
__func__, list->alias);
|
|
}
|
|
}
|
|
|
|
/* register a list of fixed clocks */
|
|
void __init samsung_clk_register_fixed_rate(
|
|
struct samsung_fixed_rate_clock *list, unsigned int nr_clk)
|
|
{
|
|
struct clk *clk;
|
|
unsigned int idx, ret;
|
|
|
|
for (idx = 0; idx < nr_clk; idx++, list++) {
|
|
clk = clk_register_fixed_rate(NULL, list->name,
|
|
list->parent_name, list->flags, list->fixed_rate);
|
|
if (IS_ERR(clk)) {
|
|
pr_err("%s: failed to register clock %s\n", __func__,
|
|
list->name);
|
|
continue;
|
|
}
|
|
|
|
samsung_clk_add_lookup(clk, list->id);
|
|
|
|
/*
|
|
* Unconditionally add a clock lookup for the fixed rate clocks.
|
|
* There are not many of these on any of Samsung platforms.
|
|
*/
|
|
ret = clk_register_clkdev(clk, list->name, NULL);
|
|
if (ret)
|
|
pr_err("%s: failed to register clock lookup for %s",
|
|
__func__, list->name);
|
|
}
|
|
}
|
|
|
|
/* register a list of fixed factor clocks */
|
|
void __init samsung_clk_register_fixed_factor(
|
|
struct samsung_fixed_factor_clock *list, unsigned int nr_clk)
|
|
{
|
|
struct clk *clk;
|
|
unsigned int idx;
|
|
|
|
for (idx = 0; idx < nr_clk; idx++, list++) {
|
|
clk = clk_register_fixed_factor(NULL, list->name,
|
|
list->parent_name, list->flags, list->mult, list->div);
|
|
if (IS_ERR(clk)) {
|
|
pr_err("%s: failed to register clock %s\n", __func__,
|
|
list->name);
|
|
continue;
|
|
}
|
|
|
|
samsung_clk_add_lookup(clk, list->id);
|
|
}
|
|
}
|
|
|
|
/* register a list of mux clocks */
|
|
void __init samsung_clk_register_mux(struct samsung_mux_clock *list,
|
|
unsigned int nr_clk)
|
|
{
|
|
struct clk *clk;
|
|
unsigned int idx, ret;
|
|
|
|
for (idx = 0; idx < nr_clk; idx++, list++) {
|
|
clk = clk_register_mux(NULL, list->name, list->parent_names,
|
|
list->num_parents, list->flags, reg_base + list->offset,
|
|
list->shift, list->width, list->mux_flags, &lock);
|
|
if (IS_ERR(clk)) {
|
|
pr_err("%s: failed to register clock %s\n", __func__,
|
|
list->name);
|
|
continue;
|
|
}
|
|
|
|
samsung_clk_add_lookup(clk, list->id);
|
|
|
|
/* register a clock lookup only if a clock alias is specified */
|
|
if (list->alias) {
|
|
ret = clk_register_clkdev(clk, list->alias,
|
|
list->dev_name);
|
|
if (ret)
|
|
pr_err("%s: failed to register lookup %s\n",
|
|
__func__, list->alias);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* register a list of div clocks */
|
|
void __init samsung_clk_register_div(struct samsung_div_clock *list,
|
|
unsigned int nr_clk)
|
|
{
|
|
struct clk *clk;
|
|
unsigned int idx, ret;
|
|
|
|
for (idx = 0; idx < nr_clk; idx++, list++) {
|
|
if (list->table)
|
|
clk = clk_register_divider_table(NULL, list->name,
|
|
list->parent_name, list->flags,
|
|
reg_base + list->offset, list->shift,
|
|
list->width, list->div_flags,
|
|
list->table, &lock);
|
|
else
|
|
clk = clk_register_divider(NULL, list->name,
|
|
list->parent_name, list->flags,
|
|
reg_base + list->offset, list->shift,
|
|
list->width, list->div_flags, &lock);
|
|
if (IS_ERR(clk)) {
|
|
pr_err("%s: failed to register clock %s\n", __func__,
|
|
list->name);
|
|
continue;
|
|
}
|
|
|
|
samsung_clk_add_lookup(clk, list->id);
|
|
|
|
/* register a clock lookup only if a clock alias is specified */
|
|
if (list->alias) {
|
|
ret = clk_register_clkdev(clk, list->alias,
|
|
list->dev_name);
|
|
if (ret)
|
|
pr_err("%s: failed to register lookup %s\n",
|
|
__func__, list->alias);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* register a list of gate clocks */
|
|
void __init samsung_clk_register_gate(struct samsung_gate_clock *list,
|
|
unsigned int nr_clk)
|
|
{
|
|
struct clk *clk;
|
|
unsigned int idx, ret;
|
|
|
|
for (idx = 0; idx < nr_clk; idx++, list++) {
|
|
clk = clk_register_gate(NULL, list->name, list->parent_name,
|
|
list->flags, reg_base + list->offset,
|
|
list->bit_idx, list->gate_flags, &lock);
|
|
if (IS_ERR(clk)) {
|
|
pr_err("%s: failed to register clock %s\n", __func__,
|
|
list->name);
|
|
continue;
|
|
}
|
|
|
|
/* register a clock lookup only if a clock alias is specified */
|
|
if (list->alias) {
|
|
ret = clk_register_clkdev(clk, list->alias,
|
|
list->dev_name);
|
|
if (ret)
|
|
pr_err("%s: failed to register lookup %s\n",
|
|
__func__, list->alias);
|
|
}
|
|
|
|
samsung_clk_add_lookup(clk, list->id);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* obtain the clock speed of all external fixed clock sources from device
|
|
* tree and register it
|
|
*/
|
|
#ifdef CONFIG_OF
|
|
void __init samsung_clk_of_register_fixed_ext(
|
|
struct samsung_fixed_rate_clock *fixed_rate_clk,
|
|
unsigned int nr_fixed_rate_clk,
|
|
struct of_device_id *clk_matches)
|
|
{
|
|
const struct of_device_id *match;
|
|
struct device_node *np;
|
|
u32 freq;
|
|
|
|
for_each_matching_node_and_match(np, clk_matches, &match) {
|
|
if (of_property_read_u32(np, "clock-frequency", &freq))
|
|
continue;
|
|
fixed_rate_clk[(u32)match->data].fixed_rate = freq;
|
|
}
|
|
samsung_clk_register_fixed_rate(fixed_rate_clk, nr_fixed_rate_clk);
|
|
}
|
|
#endif
|
|
|
|
/* utility function to get the rate of a specified clock */
|
|
unsigned long _get_rate(const char *clk_name)
|
|
{
|
|
struct clk *clk;
|
|
unsigned long rate;
|
|
|
|
clk = clk_get(NULL, clk_name);
|
|
if (IS_ERR(clk)) {
|
|
pr_err("%s: could not find clock %s\n", __func__, clk_name);
|
|
return 0;
|
|
}
|
|
rate = clk_get_rate(clk);
|
|
clk_put(clk);
|
|
return rate;
|
|
}
|