Commit 7a29a869 authored by Carlo Caione's avatar Carlo Caione Committed by Stephen Boyd

clk: meson: Add support for Meson clock controller

This patchset adds the infrastructure for registering and managing the
core clocks found on Amlogic MesonX SoCs. In particular:

- PLLs
- CPU clock
- Fixed rate clocks, fixed factor clocks, ...
Signed-off-by: default avatarCarlo Caione <carlo@endlessm.com>
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent b787f68c
...@@ -55,6 +55,7 @@ ifeq ($(CONFIG_COMMON_CLK), y) ...@@ -55,6 +55,7 @@ ifeq ($(CONFIG_COMMON_CLK), y)
obj-$(CONFIG_ARCH_MMP) += mmp/ obj-$(CONFIG_ARCH_MMP) += mmp/
endif endif
obj-$(CONFIG_PLAT_ORION) += mvebu/ obj-$(CONFIG_PLAT_ORION) += mvebu/
obj-$(CONFIG_ARCH_MESON) += meson/
obj-$(CONFIG_ARCH_MXS) += mxs/ obj-$(CONFIG_ARCH_MXS) += mxs/
obj-$(CONFIG_MACH_PISTACHIO) += pistachio/ obj-$(CONFIG_MACH_PISTACHIO) += pistachio/
obj-$(CONFIG_COMMON_CLK_PXA) += pxa/ obj-$(CONFIG_COMMON_CLK_PXA) += pxa/
......
#
# Makefile for Meson specific clk
#
obj-y += clkc.o clk-pll.o clk-cpu.o
/*
* Copyright (c) 2015 Endless Mobile, Inc.
* Author: Carlo Caione <carlo@endlessm.com>
*
* 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.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* CPU clock path:
*
* +-[/N]-----|3|
* MUX2 +--[/3]-+----------|2| MUX1
* [sys_pll]---|1| |--[/2]------------|1|-|1|
* | |---+------------------|0| | |----- [a5_clk]
* +--|0| | |
* [xtal]---+-------------------------------|0|
*
*
*
*/
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/clk-provider.h>
#define MESON_CPU_CLK_CNTL1 0x00
#define MESON_CPU_CLK_CNTL 0x40
#define MESON_CPU_CLK_MUX1 BIT(7)
#define MESON_CPU_CLK_MUX2 BIT(0)
#define MESON_N_WIDTH 9
#define MESON_N_SHIFT 20
#define MESON_SEL_WIDTH 2
#define MESON_SEL_SHIFT 2
#include "clkc.h"
struct meson_clk_cpu {
struct notifier_block clk_nb;
const struct clk_div_table *div_table;
struct clk_hw hw;
void __iomem *base;
u16 reg_off;
};
#define to_meson_clk_cpu_hw(_hw) container_of(_hw, struct meson_clk_cpu, hw)
#define to_meson_clk_cpu_nb(_nb) container_of(_nb, struct meson_clk_cpu, clk_nb)
static long meson_clk_cpu_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct meson_clk_cpu *clk_cpu = to_meson_clk_cpu_hw(hw);
return divider_round_rate(hw, rate, prate, clk_cpu->div_table,
MESON_N_WIDTH, CLK_DIVIDER_ROUND_CLOSEST);
}
static int meson_clk_cpu_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct meson_clk_cpu *clk_cpu = to_meson_clk_cpu_hw(hw);
unsigned int div, sel, N = 0;
u32 reg;
div = DIV_ROUND_UP(parent_rate, rate);
if (div <= 3) {
sel = div - 1;
} else {
sel = 3;
N = div / 2;
}
reg = readl(clk_cpu->base + clk_cpu->reg_off + MESON_CPU_CLK_CNTL1);
reg = PARM_SET(MESON_N_WIDTH, MESON_N_SHIFT, reg, N);
writel(reg, clk_cpu->base + clk_cpu->reg_off + MESON_CPU_CLK_CNTL1);
reg = readl(clk_cpu->base + clk_cpu->reg_off + MESON_CPU_CLK_CNTL);
reg = PARM_SET(MESON_SEL_WIDTH, MESON_SEL_SHIFT, reg, sel);
writel(reg, clk_cpu->base + clk_cpu->reg_off + MESON_CPU_CLK_CNTL);
return 0;
}
static unsigned long meson_clk_cpu_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct meson_clk_cpu *clk_cpu = to_meson_clk_cpu_hw(hw);
unsigned int N, sel;
unsigned int div = 1;
u32 reg;
reg = readl(clk_cpu->base + clk_cpu->reg_off + MESON_CPU_CLK_CNTL1);
N = PARM_GET(MESON_N_WIDTH, MESON_N_SHIFT, reg);
reg = readl(clk_cpu->base + clk_cpu->reg_off + MESON_CPU_CLK_CNTL);
sel = PARM_GET(MESON_SEL_WIDTH, MESON_SEL_SHIFT, reg);
if (sel < 3)
div = sel + 1;
else
div = 2 * N;
return parent_rate / div;
}
static int meson_clk_cpu_pre_rate_change(struct meson_clk_cpu *clk_cpu,
struct clk_notifier_data *ndata)
{
u32 cpu_clk_cntl;
/* switch MUX1 to xtal */
cpu_clk_cntl = readl(clk_cpu->base + clk_cpu->reg_off
+ MESON_CPU_CLK_CNTL);
cpu_clk_cntl &= ~MESON_CPU_CLK_MUX1;
writel(cpu_clk_cntl, clk_cpu->base + clk_cpu->reg_off
+ MESON_CPU_CLK_CNTL);
udelay(100);
/* switch MUX2 to sys-pll */
cpu_clk_cntl |= MESON_CPU_CLK_MUX2;
writel(cpu_clk_cntl, clk_cpu->base + clk_cpu->reg_off
+ MESON_CPU_CLK_CNTL);
return 0;
}
static int meson_clk_cpu_post_rate_change(struct meson_clk_cpu *clk_cpu,
struct clk_notifier_data *ndata)
{
u32 cpu_clk_cntl;
/* switch MUX1 to divisors' output */
cpu_clk_cntl = readl(clk_cpu->base + clk_cpu->reg_off
+ MESON_CPU_CLK_CNTL);
cpu_clk_cntl |= MESON_CPU_CLK_MUX1;
writel(cpu_clk_cntl, clk_cpu->base + clk_cpu->reg_off
+ MESON_CPU_CLK_CNTL);
udelay(100);
return 0;
}
/*
* This clock notifier is called when the frequency of the of the parent
* PLL clock is to be changed. We use the xtal input as temporary parent
* while the PLL frequency is stabilized.
*/
static int meson_clk_cpu_notifier_cb(struct notifier_block *nb,
unsigned long event, void *data)
{
struct clk_notifier_data *ndata = data;
struct meson_clk_cpu *clk_cpu = to_meson_clk_cpu_nb(nb);
int ret = 0;
if (event == PRE_RATE_CHANGE)
ret = meson_clk_cpu_pre_rate_change(clk_cpu, ndata);
else if (event == POST_RATE_CHANGE)
ret = meson_clk_cpu_post_rate_change(clk_cpu, ndata);
return notifier_from_errno(ret);
}
static const struct clk_ops meson_clk_cpu_ops = {
.recalc_rate = meson_clk_cpu_recalc_rate,
.round_rate = meson_clk_cpu_round_rate,
.set_rate = meson_clk_cpu_set_rate,
};
struct clk *meson_clk_register_cpu(const struct clk_conf *clk_conf,
void __iomem *reg_base,
spinlock_t *lock)
{
struct clk *clk;
struct clk *pclk;
struct meson_clk_cpu *clk_cpu;
struct clk_init_data init;
int ret;
clk_cpu = kzalloc(sizeof(*clk_cpu), GFP_KERNEL);
if (!clk_cpu)
return ERR_PTR(-ENOMEM);
clk_cpu->base = reg_base;
clk_cpu->reg_off = clk_conf->reg_off;
clk_cpu->div_table = clk_conf->conf.div_table;
clk_cpu->clk_nb.notifier_call = meson_clk_cpu_notifier_cb;
init.name = clk_conf->clk_name;
init.ops = &meson_clk_cpu_ops;
init.flags = clk_conf->flags | CLK_GET_RATE_NOCACHE;
init.flags |= CLK_SET_RATE_PARENT;
init.parent_names = clk_conf->clks_parent;
init.num_parents = 1;
clk_cpu->hw.init = &init;
pclk = __clk_lookup(clk_conf->clks_parent[0]);
if (!pclk) {
pr_err("%s: could not lookup parent clock %s\n",
__func__, clk_conf->clks_parent[0]);
return ERR_PTR(-EINVAL);
}
ret = clk_notifier_register(pclk, &clk_cpu->clk_nb);
if (ret) {
pr_err("%s: failed to register clock notifier for %s\n",
__func__, clk_conf->clk_name);
return ERR_PTR(-EINVAL);
}
clk = clk_register(NULL, &clk_cpu->hw);
if (IS_ERR(clk)) {
clk_notifier_unregister(pclk, &clk_cpu->clk_nb);
kfree(clk_cpu);
}
return clk;
}
/*
* Copyright (c) 2015 Endless Mobile, Inc.
* Author: Carlo Caione <carlo@endlessm.com>
*
* 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.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* In the most basic form, a Meson PLL is composed as follows:
*
* PLL
* +------------------------------+
* | |
* in -----[ /N ]---[ *M ]---[ >>OD ]----->> out
* | ^ ^ |
* +------------------------------+
* | |
* FREF VCO
*
* out = (in * M / N) >> OD
*/
#include <linux/clk-provider.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/string.h>
#include "clkc.h"
#define MESON_PLL_RESET BIT(29)
#define MESON_PLL_LOCK BIT(31)
struct meson_clk_pll {
struct clk_hw hw;
void __iomem *base;
struct pll_conf *conf;
unsigned int rate_count;
spinlock_t *lock;
};
#define to_meson_clk_pll(_hw) container_of(_hw, struct meson_clk_pll, hw)
static unsigned long meson_clk_pll_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct meson_clk_pll *pll = to_meson_clk_pll(hw);
struct parm *p;
unsigned long parent_rate_mhz = parent_rate / 1000000;
unsigned long rate_mhz;
u16 n, m, od;
u32 reg;
p = &pll->conf->n;
reg = readl(pll->base + p->reg_off);
n = PARM_GET(p->width, p->shift, reg);
p = &pll->conf->m;
reg = readl(pll->base + p->reg_off);
m = PARM_GET(p->width, p->shift, reg);
p = &pll->conf->od;
reg = readl(pll->base + p->reg_off);
od = PARM_GET(p->width, p->shift, reg);
rate_mhz = (parent_rate_mhz * m / n) >> od;
return rate_mhz * 1000000;
}
static long meson_clk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
struct meson_clk_pll *pll = to_meson_clk_pll(hw);
const struct pll_rate_table *rate_table = pll->conf->rate_table;
int i;
for (i = 0; i < pll->rate_count; i++) {
if (rate <= rate_table[i].rate)
return rate_table[i].rate;
}
/* else return the smallest value */
return rate_table[0].rate;
}
static const struct pll_rate_table *meson_clk_get_pll_settings(struct meson_clk_pll *pll,
unsigned long rate)
{
const struct pll_rate_table *rate_table = pll->conf->rate_table;
int i;
for (i = 0; i < pll->rate_count; i++) {
if (rate == rate_table[i].rate)
return &rate_table[i];
}
return NULL;
}
static int meson_clk_pll_wait_lock(struct meson_clk_pll *pll,
struct parm *p_n)
{
int delay = 24000000;
u32 reg;
while (delay > 0) {
reg = readl(pll->base + p_n->reg_off);
if (reg & MESON_PLL_LOCK)
return 0;
delay--;
}
return -ETIMEDOUT;
}
static int meson_clk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct meson_clk_pll *pll = to_meson_clk_pll(hw);
struct parm *p;
const struct pll_rate_table *rate_set;
unsigned long old_rate;
int ret = 0;
u32 reg;
if (parent_rate == 0 || rate == 0)
return -EINVAL;
old_rate = rate;
rate_set = meson_clk_get_pll_settings(pll, rate);
if (!rate_set)
return -EINVAL;
/* PLL reset */
p = &pll->conf->n;
reg = readl(pll->base + p->reg_off);
writel(reg | MESON_PLL_RESET, pll->base + p->reg_off);
reg = PARM_SET(p->width, p->shift, reg, rate_set->n);
writel(reg, pll->base + p->reg_off);
p = &pll->conf->m;
reg = readl(pll->base + p->reg_off);
reg = PARM_SET(p->width, p->shift, reg, rate_set->m);
writel(reg, pll->base + p->reg_off);
p = &pll->conf->od;
reg = readl(pll->base + p->reg_off);
reg = PARM_SET(p->width, p->shift, reg, rate_set->od);
writel(reg, pll->base + p->reg_off);
p = &pll->conf->n;
ret = meson_clk_pll_wait_lock(pll, p);
if (ret) {
pr_warn("%s: pll did not lock, trying to restore old rate %lu\n",
__func__, old_rate);
meson_clk_pll_set_rate(hw, old_rate, parent_rate);
}
return ret;
}
static const struct clk_ops meson_clk_pll_ops = {
.recalc_rate = meson_clk_pll_recalc_rate,
.round_rate = meson_clk_pll_round_rate,
.set_rate = meson_clk_pll_set_rate,
};
static const struct clk_ops meson_clk_pll_ro_ops = {
.recalc_rate = meson_clk_pll_recalc_rate,
};
struct clk *meson_clk_register_pll(const struct clk_conf *clk_conf,
void __iomem *reg_base,
spinlock_t *lock)
{
struct clk *clk;
struct meson_clk_pll *clk_pll;
struct clk_init_data init;
clk_pll = kzalloc(sizeof(*clk_pll), GFP_KERNEL);
if (!clk_pll)
return ERR_PTR(-ENOMEM);
clk_pll->base = reg_base + clk_conf->reg_off;
clk_pll->lock = lock;
clk_pll->conf = clk_conf->conf.pll;
init.name = clk_conf->clk_name;
init.flags = clk_conf->flags | CLK_GET_RATE_NOCACHE;
init.parent_names = &clk_conf->clks_parent[0];
init.num_parents = 1;
init.ops = &meson_clk_pll_ro_ops;
/* If no rate_table is specified we assume the PLL is read-only */
if (clk_pll->conf->rate_table) {
int len;
for (len = 0; clk_pll->conf->rate_table[len].rate != 0; )
len++;
clk_pll->rate_count = len;
init.ops = &meson_clk_pll_ops;
}
clk_pll->hw.init = &init;
clk = clk_register(NULL, &clk_pll->hw);
if (IS_ERR(clk))
kfree(clk_pll);
return clk;
}
/*
* Copyright (c) 2015 Endless Mobile, Inc.
* Author: Carlo Caione <carlo@endlessm.com>
*
* 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.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/mfd/syscon.h>
#include <linux/slab.h>
#include "clkc.h"
static DEFINE_SPINLOCK(clk_lock);
static struct clk **clks;
static struct clk_onecell_data clk_data;
struct clk ** __init meson_clk_init(struct device_node *np,
unsigned long nr_clks)
{
clks = kcalloc(nr_clks, sizeof(*clks), GFP_KERNEL);
if (!clks)
return ERR_PTR(-ENOMEM);
clk_data.clks = clks;
clk_data.clk_num = nr_clks;
of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
return clks;
}
static void meson_clk_add_lookup(struct clk *clk, unsigned int id)
{
if (clks && id)
clks[id] = clk;
}
static struct clk * __init
meson_clk_register_composite(const struct clk_conf *clk_conf,
void __iomem *clk_base)
{
struct clk *clk;
struct clk_mux *mux = NULL;
struct clk_divider *div = NULL;
struct clk_gate *gate = NULL;
const struct clk_ops *mux_ops = NULL;
const struct composite_conf *composite_conf;
composite_conf = clk_conf->conf.composite;
if (clk_conf->num_parents > 1) {
mux = kzalloc(sizeof(*mux), GFP_KERNEL);
if (!mux)
return ERR_PTR(-ENOMEM);
mux->reg = clk_base + clk_conf->reg_off
+ composite_conf->mux_parm.reg_off;
mux->shift = composite_conf->mux_parm.shift;
mux->mask = BIT(composite_conf->mux_parm.width) - 1;
mux->flags = composite_conf->mux_flags;
mux->lock = &clk_lock;
mux->table = composite_conf->mux_table;
mux_ops = (composite_conf->mux_flags & CLK_MUX_READ_ONLY) ?
&clk_mux_ro_ops : &clk_mux_ops;
}
if (MESON_PARM_APPLICABLE(&composite_conf->div_parm)) {
div = kzalloc(sizeof(*div), GFP_KERNEL);
if (!div) {
clk = ERR_PTR(-ENOMEM);
goto error;
}
div->reg = clk_base + clk_conf->reg_off
+ composite_conf->div_parm.reg_off;
div->shift = composite_conf->div_parm.shift;
div->width = composite_conf->div_parm.width;
div->lock = &clk_lock;
div->flags = composite_conf->div_flags;
div->table = composite_conf->div_table;
}
if (MESON_PARM_APPLICABLE(&composite_conf->gate_parm)) {
gate = kzalloc(sizeof(*gate), GFP_KERNEL);
if (!gate) {
clk = ERR_PTR(-ENOMEM);
goto error;
}
gate->reg = clk_base + clk_conf->reg_off
+ composite_conf->div_parm.reg_off;
gate->bit_idx = composite_conf->gate_parm.shift;
gate->flags = composite_conf->gate_flags;
gate->lock = &clk_lock;
}
clk = clk_register_composite(NULL, clk_conf->clk_name,
clk_conf->clks_parent,
clk_conf->num_parents,
mux ? &mux->hw : NULL, mux_ops,
div ? &div->hw : NULL, &clk_divider_ops,
gate ? &gate->hw : NULL, &clk_gate_ops,
clk_conf->flags);
if (IS_ERR(clk))
goto error;
return clk;
error:
kfree(gate);
kfree(div);
kfree(mux);
return clk;
}
static struct clk * __init
meson_clk_register_fixed_factor(const struct clk_conf *clk_conf,
void __iomem *clk_base)
{
struct clk *clk;
const struct fixed_fact_conf *fixed_fact_conf;
const struct parm *p;
unsigned int mult, div;
u32 reg;
fixed_fact_conf = &clk_conf->conf.fixed_fact;
mult = clk_conf->conf.fixed_fact.mult;
div = clk_conf->conf.fixed_fact.div;
if (!mult) {
mult = 1;
p = &fixed_fact_conf->mult_parm;
if (MESON_PARM_APPLICABLE(p)) {
reg = readl(clk_base + clk_conf->reg_off + p->reg_off);
mult = PARM_GET(p->width, p->shift, reg);
}
}
if (!div) {
div = 1;
p = &fixed_fact_conf->div_parm;
if (MESON_PARM_APPLICABLE(p)) {
reg = readl(clk_base + clk_conf->reg_off + p->reg_off);
mult = PARM_GET(p->width, p->shift, reg);
}
}
clk = clk_register_fixed_factor(NULL,
clk_conf->clk_name,
clk_conf->clks_parent[0],
clk_conf->flags,
mult, div);
return clk;
}
static struct clk * __init
meson_clk_register_fixed_rate(const struct clk_conf *clk_conf,
void __iomem *clk_base)
{
struct clk *clk;
const struct fixed_rate_conf *fixed_rate_conf;
const struct parm *r;
unsigned long rate;
u32 reg;
fixed_rate_conf = &clk_conf->conf.fixed_rate;
rate = fixed_rate_conf->rate;
if (!rate) {
r = &fixed_rate_conf->rate_parm;
reg = readl(clk_base + clk_conf->reg_off + r->reg_off);
rate = PARM_GET(r->width, r->shift, reg);
}
rate *= 1000000;
clk = clk_register_fixed_rate(NULL,
clk_conf->clk_name,
clk_conf->num_parents
? clk_conf->clks_parent[0] : NULL,
clk_conf->flags, rate);
return clk;
}
void __init meson_clk_register_clks(const struct clk_conf *clk_confs,
size_t nr_confs,
void __iomem *clk_base)
{
unsigned int i;
struct clk *clk = NULL;
for (i = 0; i < nr_confs; i++) {
const struct clk_conf *clk_conf = &clk_confs[i];
switch (clk_conf->clk_type) {
case CLK_FIXED_RATE:
clk = meson_clk_register_fixed_rate(clk_conf,
clk_base);
break;
case CLK_FIXED_FACTOR:
clk = meson_clk_register_fixed_factor(clk_conf,
clk_base);
break;
case CLK_COMPOSITE:
clk = meson_clk_register_composite(clk_conf,
clk_base);
break;
case CLK_CPU:
clk = meson_clk_register_cpu(clk_conf, clk_base,
&clk_lock);
break;
case CLK_PLL:
clk = meson_clk_register_pll(clk_conf, clk_base,
&clk_lock);
break;
default:
clk = NULL;
}
if (!clk) {
pr_err("%s: unknown clock type %d\n", __func__,
clk_conf->clk_type);
continue;
}
if (IS_ERR(clk)) {
pr_warn("%s: Unable to create %s clock\n", __func__,
clk_conf->clk_name);
continue;
}
meson_clk_add_lookup(clk, clk_conf->clk_id);
}
}
/*
* Copyright (c) 2015 Endless Mobile, Inc.
* Author: Carlo Caione <carlo@endlessm.com>
*
* 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.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __CLKC_H
#define __CLKC_H
#define PMASK(width) GENMASK(width - 1, 0)
#define SETPMASK(width, shift) GENMASK(shift + width - 1, shift)
#define CLRPMASK(width, shift) (~SETPMASK(width, shift))
#define PARM_GET(width, shift, reg) \
(((reg) & SETPMASK(width, shift)) >> (shift))
#define PARM_SET(width, shift, reg, val) \
(((reg) & CLRPMASK(width, shift)) | (val << (shift)))
#define MESON_PARM_APPLICABLE(p) (!!((p)->width))
struct parm {
u16 reg_off;
u8 shift;
u8 width;
};
#define PARM(_r, _s, _w) \
{ \
.reg_off = (_r), \
.shift = (_s), \
.width = (_w), \
} \
struct pll_rate_table {
unsigned long rate;
u16 m;
u16 n;
u16 od;
};
#define PLL_RATE(_r, _m, _n, _od) \
{ \
.rate = (_r), \
.m = (_m), \
.n = (_n), \
.od = (_od), \
} \
struct pll_conf {
const struct pll_rate_table *rate_table;
struct parm m;
struct parm n;
struct parm od;
};
struct fixed_fact_conf {
unsigned int div;
unsigned int mult;
struct parm div_parm;
struct parm mult_parm;
};
struct fixed_rate_conf {
unsigned long rate;
struct parm rate_parm;
};
struct composite_conf {
struct parm mux_parm;
struct parm div_parm;
struct parm gate_parm;
struct clk_div_table *div_table;
u32 *mux_table;
u8 mux_flags;
u8 div_flags;
u8 gate_flags;
};
#define PNAME(x) static const char *x[]
enum clk_type {
CLK_FIXED_FACTOR,
CLK_FIXED_RATE,
CLK_COMPOSITE,
CLK_CPU,
CLK_PLL,
};
struct clk_conf {
u16 reg_off;
enum clk_type clk_type;
unsigned int clk_id;
const char *clk_name;
const char **clks_parent;
int num_parents;
unsigned long flags;
union {
struct fixed_fact_conf fixed_fact;
struct fixed_rate_conf fixed_rate;
const struct composite_conf *composite;
struct pll_conf *pll;
const struct clk_div_table *div_table;
} conf;
};
#define FIXED_RATE_P(_ro, _ci, _cn, _f, _c) \
{ \
.reg_off = (_ro), \
.clk_type = CLK_FIXED_RATE, \
.clk_id = (_ci), \
.clk_name = (_cn), \
.flags = (_f), \
.conf.fixed_rate.rate_parm = _c, \
} \
#define FIXED_RATE(_ci, _cn, _f, _r) \
{ \
.clk_type = CLK_FIXED_RATE, \
.clk_id = (_ci), \
.clk_name = (_cn), \
.flags = (_f), \
.conf.fixed_rate.rate = (_r), \
} \
#define PLL(_ro, _ci, _cn, _cp, _f, _c) \
{ \
.reg_off = (_ro), \
.clk_type = CLK_PLL, \
.clk_id = (_ci), \
.clk_name = (_cn), \
.clks_parent = (_cp), \
.num_parents = ARRAY_SIZE(_cp), \
.flags = (_f), \
.conf.pll = (_c), \
} \
#define FIXED_FACTOR_DIV(_ci, _cn, _cp, _f, _d) \
{ \
.clk_type = CLK_FIXED_FACTOR, \
.clk_id = (_ci), \
.clk_name = (_cn), \
.clks_parent = (_cp), \
.num_parents = ARRAY_SIZE(_cp), \
.conf.fixed_fact.div = (_d), \
} \
#define CPU(_ro, _ci, _cn, _cp, _dt) \
{ \
.reg_off = (_ro), \
.clk_type = CLK_CPU, \
.clk_id = (_ci), \
.clk_name = (_cn), \
.clks_parent = (_cp), \
.num_parents = ARRAY_SIZE(_cp), \
.conf.div_table = (_dt), \
} \
#define COMPOSITE(_ro, _ci, _cn, _cp, _f, _c) \
{ \
.reg_off = (_ro), \
.clk_type = CLK_COMPOSITE, \
.clk_id = (_ci), \
.clk_name = (_cn), \
.clks_parent = (_cp), \
.num_parents = ARRAY_SIZE(_cp), \
.flags = (_f), \
.conf.composite = (_c), \
} \
struct clk **meson_clk_init(struct device_node *np, unsigned long nr_clks);
void meson_clk_register_clks(const struct clk_conf *clk_confs,
unsigned int nr_confs, void __iomem *clk_base);
struct clk *meson_clk_register_cpu(const struct clk_conf *clk_conf,
void __iomem *reg_base, spinlock_t *lock);
struct clk *meson_clk_register_pll(const struct clk_conf *clk_conf,
void __iomem *reg_base, spinlock_t *lock);
#endif /* __CLKC_H */
/*
* Meson8b clock tree IDs
*/
#ifndef __MESON8B_CLKC_H
#define __MESON8B_CLKC_H
#define CLKID_UNUSED 0
#define CLKID_XTAL 1
#define CLKID_PLL_FIXED 2
#define CLKID_PLL_VID 3
#define CLKID_PLL_SYS 4
#define CLKID_FCLK_DIV2 5
#define CLKID_FCLK_DIV3 6
#define CLKID_FCLK_DIV4 7
#define CLKID_FCLK_DIV5 8
#define CLKID_FCLK_DIV7 9
#define CLKID_CLK81 10
#define CLKID_MALI 11
#define CLKID_CPUCLK 12
#define CLKID_ZERO 13
#define CLK_NR_CLKS (CLKID_ZERO + 1)
#endif /* __MESON8B_CLKC_H */
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