mirror of https://gitee.com/openkylin/linux.git
895 lines
21 KiB
C
895 lines
21 KiB
C
/*
|
|
* Copyright (c) 2013, The Linux Foundation. All rights reserved.
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that 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.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/err.h>
|
|
#include <linux/export.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/regmap.h>
|
|
|
|
#include <asm/div64.h>
|
|
|
|
#include "clk-rcg.h"
|
|
#include "common.h"
|
|
|
|
static u32 ns_to_src(struct src_sel *s, u32 ns)
|
|
{
|
|
ns >>= s->src_sel_shift;
|
|
ns &= SRC_SEL_MASK;
|
|
return ns;
|
|
}
|
|
|
|
static u32 src_to_ns(struct src_sel *s, u8 src, u32 ns)
|
|
{
|
|
u32 mask;
|
|
|
|
mask = SRC_SEL_MASK;
|
|
mask <<= s->src_sel_shift;
|
|
ns &= ~mask;
|
|
|
|
ns |= src << s->src_sel_shift;
|
|
return ns;
|
|
}
|
|
|
|
static u8 clk_rcg_get_parent(struct clk_hw *hw)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
int num_parents = clk_hw_get_num_parents(hw);
|
|
u32 ns;
|
|
int i, ret;
|
|
|
|
ret = regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
|
|
if (ret)
|
|
goto err;
|
|
ns = ns_to_src(&rcg->s, ns);
|
|
for (i = 0; i < num_parents; i++)
|
|
if (ns == rcg->s.parent_map[i].cfg)
|
|
return i;
|
|
|
|
err:
|
|
pr_debug("%s: Clock %s has invalid parent, using default.\n",
|
|
__func__, clk_hw_get_name(hw));
|
|
return 0;
|
|
}
|
|
|
|
static int reg_to_bank(struct clk_dyn_rcg *rcg, u32 bank)
|
|
{
|
|
bank &= BIT(rcg->mux_sel_bit);
|
|
return !!bank;
|
|
}
|
|
|
|
static u8 clk_dyn_rcg_get_parent(struct clk_hw *hw)
|
|
{
|
|
struct clk_dyn_rcg *rcg = to_clk_dyn_rcg(hw);
|
|
int num_parents = clk_hw_get_num_parents(hw);
|
|
u32 ns, reg;
|
|
int bank;
|
|
int i, ret;
|
|
struct src_sel *s;
|
|
|
|
ret = regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
|
|
if (ret)
|
|
goto err;
|
|
bank = reg_to_bank(rcg, reg);
|
|
s = &rcg->s[bank];
|
|
|
|
ret = regmap_read(rcg->clkr.regmap, rcg->ns_reg[bank], &ns);
|
|
if (ret)
|
|
goto err;
|
|
ns = ns_to_src(s, ns);
|
|
|
|
for (i = 0; i < num_parents; i++)
|
|
if (ns == s->parent_map[i].cfg)
|
|
return i;
|
|
|
|
err:
|
|
pr_debug("%s: Clock %s has invalid parent, using default.\n",
|
|
__func__, clk_hw_get_name(hw));
|
|
return 0;
|
|
}
|
|
|
|
static int clk_rcg_set_parent(struct clk_hw *hw, u8 index)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
u32 ns;
|
|
|
|
regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
|
|
ns = src_to_ns(&rcg->s, rcg->s.parent_map[index].cfg, ns);
|
|
regmap_write(rcg->clkr.regmap, rcg->ns_reg, ns);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static u32 md_to_m(struct mn *mn, u32 md)
|
|
{
|
|
md >>= mn->m_val_shift;
|
|
md &= BIT(mn->width) - 1;
|
|
return md;
|
|
}
|
|
|
|
static u32 ns_to_pre_div(struct pre_div *p, u32 ns)
|
|
{
|
|
ns >>= p->pre_div_shift;
|
|
ns &= BIT(p->pre_div_width) - 1;
|
|
return ns;
|
|
}
|
|
|
|
static u32 pre_div_to_ns(struct pre_div *p, u8 pre_div, u32 ns)
|
|
{
|
|
u32 mask;
|
|
|
|
mask = BIT(p->pre_div_width) - 1;
|
|
mask <<= p->pre_div_shift;
|
|
ns &= ~mask;
|
|
|
|
ns |= pre_div << p->pre_div_shift;
|
|
return ns;
|
|
}
|
|
|
|
static u32 mn_to_md(struct mn *mn, u32 m, u32 n, u32 md)
|
|
{
|
|
u32 mask, mask_w;
|
|
|
|
mask_w = BIT(mn->width) - 1;
|
|
mask = (mask_w << mn->m_val_shift) | mask_w;
|
|
md &= ~mask;
|
|
|
|
if (n) {
|
|
m <<= mn->m_val_shift;
|
|
md |= m;
|
|
md |= ~n & mask_w;
|
|
}
|
|
|
|
return md;
|
|
}
|
|
|
|
static u32 ns_m_to_n(struct mn *mn, u32 ns, u32 m)
|
|
{
|
|
ns = ~ns >> mn->n_val_shift;
|
|
ns &= BIT(mn->width) - 1;
|
|
return ns + m;
|
|
}
|
|
|
|
static u32 reg_to_mnctr_mode(struct mn *mn, u32 val)
|
|
{
|
|
val >>= mn->mnctr_mode_shift;
|
|
val &= MNCTR_MODE_MASK;
|
|
return val;
|
|
}
|
|
|
|
static u32 mn_to_ns(struct mn *mn, u32 m, u32 n, u32 ns)
|
|
{
|
|
u32 mask;
|
|
|
|
mask = BIT(mn->width) - 1;
|
|
mask <<= mn->n_val_shift;
|
|
ns &= ~mask;
|
|
|
|
if (n) {
|
|
n = n - m;
|
|
n = ~n;
|
|
n &= BIT(mn->width) - 1;
|
|
n <<= mn->n_val_shift;
|
|
ns |= n;
|
|
}
|
|
|
|
return ns;
|
|
}
|
|
|
|
static u32 mn_to_reg(struct mn *mn, u32 m, u32 n, u32 val)
|
|
{
|
|
u32 mask;
|
|
|
|
mask = MNCTR_MODE_MASK << mn->mnctr_mode_shift;
|
|
mask |= BIT(mn->mnctr_en_bit);
|
|
val &= ~mask;
|
|
|
|
if (n) {
|
|
val |= BIT(mn->mnctr_en_bit);
|
|
val |= MNCTR_MODE_DUAL << mn->mnctr_mode_shift;
|
|
}
|
|
|
|
return val;
|
|
}
|
|
|
|
static int configure_bank(struct clk_dyn_rcg *rcg, const struct freq_tbl *f)
|
|
{
|
|
u32 ns, md, reg;
|
|
int bank, new_bank, ret, index;
|
|
struct mn *mn;
|
|
struct pre_div *p;
|
|
struct src_sel *s;
|
|
bool enabled;
|
|
u32 md_reg, ns_reg;
|
|
bool banked_mn = !!rcg->mn[1].width;
|
|
bool banked_p = !!rcg->p[1].pre_div_width;
|
|
struct clk_hw *hw = &rcg->clkr.hw;
|
|
|
|
enabled = __clk_is_enabled(hw->clk);
|
|
|
|
ret = regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
|
|
if (ret)
|
|
return ret;
|
|
bank = reg_to_bank(rcg, reg);
|
|
new_bank = enabled ? !bank : bank;
|
|
|
|
ns_reg = rcg->ns_reg[new_bank];
|
|
ret = regmap_read(rcg->clkr.regmap, ns_reg, &ns);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (banked_mn) {
|
|
mn = &rcg->mn[new_bank];
|
|
md_reg = rcg->md_reg[new_bank];
|
|
|
|
ns |= BIT(mn->mnctr_reset_bit);
|
|
ret = regmap_write(rcg->clkr.regmap, ns_reg, ns);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = regmap_read(rcg->clkr.regmap, md_reg, &md);
|
|
if (ret)
|
|
return ret;
|
|
md = mn_to_md(mn, f->m, f->n, md);
|
|
ret = regmap_write(rcg->clkr.regmap, md_reg, md);
|
|
if (ret)
|
|
return ret;
|
|
ns = mn_to_ns(mn, f->m, f->n, ns);
|
|
ret = regmap_write(rcg->clkr.regmap, ns_reg, ns);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Two NS registers means mode control is in NS register */
|
|
if (rcg->ns_reg[0] != rcg->ns_reg[1]) {
|
|
ns = mn_to_reg(mn, f->m, f->n, ns);
|
|
ret = regmap_write(rcg->clkr.regmap, ns_reg, ns);
|
|
if (ret)
|
|
return ret;
|
|
} else {
|
|
reg = mn_to_reg(mn, f->m, f->n, reg);
|
|
ret = regmap_write(rcg->clkr.regmap, rcg->bank_reg,
|
|
reg);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ns &= ~BIT(mn->mnctr_reset_bit);
|
|
ret = regmap_write(rcg->clkr.regmap, ns_reg, ns);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (banked_p) {
|
|
p = &rcg->p[new_bank];
|
|
ns = pre_div_to_ns(p, f->pre_div - 1, ns);
|
|
}
|
|
|
|
s = &rcg->s[new_bank];
|
|
index = qcom_find_src_index(hw, s->parent_map, f->src);
|
|
if (index < 0)
|
|
return index;
|
|
ns = src_to_ns(s, s->parent_map[index].cfg, ns);
|
|
ret = regmap_write(rcg->clkr.regmap, ns_reg, ns);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (enabled) {
|
|
ret = regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
|
|
if (ret)
|
|
return ret;
|
|
reg ^= BIT(rcg->mux_sel_bit);
|
|
ret = regmap_write(rcg->clkr.regmap, rcg->bank_reg, reg);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int clk_dyn_rcg_set_parent(struct clk_hw *hw, u8 index)
|
|
{
|
|
struct clk_dyn_rcg *rcg = to_clk_dyn_rcg(hw);
|
|
u32 ns, md, reg;
|
|
int bank;
|
|
struct freq_tbl f = { 0 };
|
|
bool banked_mn = !!rcg->mn[1].width;
|
|
bool banked_p = !!rcg->p[1].pre_div_width;
|
|
|
|
regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
|
|
bank = reg_to_bank(rcg, reg);
|
|
|
|
regmap_read(rcg->clkr.regmap, rcg->ns_reg[bank], &ns);
|
|
|
|
if (banked_mn) {
|
|
regmap_read(rcg->clkr.regmap, rcg->md_reg[bank], &md);
|
|
f.m = md_to_m(&rcg->mn[bank], md);
|
|
f.n = ns_m_to_n(&rcg->mn[bank], ns, f.m);
|
|
}
|
|
|
|
if (banked_p)
|
|
f.pre_div = ns_to_pre_div(&rcg->p[bank], ns) + 1;
|
|
|
|
f.src = qcom_find_src_index(hw, rcg->s[bank].parent_map, index);
|
|
return configure_bank(rcg, &f);
|
|
}
|
|
|
|
/*
|
|
* Calculate m/n:d rate
|
|
*
|
|
* parent_rate m
|
|
* rate = ----------- x ---
|
|
* pre_div n
|
|
*/
|
|
static unsigned long
|
|
calc_rate(unsigned long rate, u32 m, u32 n, u32 mode, u32 pre_div)
|
|
{
|
|
if (pre_div)
|
|
rate /= pre_div + 1;
|
|
|
|
if (mode) {
|
|
u64 tmp = rate;
|
|
tmp *= m;
|
|
do_div(tmp, n);
|
|
rate = tmp;
|
|
}
|
|
|
|
return rate;
|
|
}
|
|
|
|
static unsigned long
|
|
clk_rcg_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
u32 pre_div, m = 0, n = 0, ns, md, mode = 0;
|
|
struct mn *mn = &rcg->mn;
|
|
|
|
regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
|
|
pre_div = ns_to_pre_div(&rcg->p, ns);
|
|
|
|
if (rcg->mn.width) {
|
|
regmap_read(rcg->clkr.regmap, rcg->md_reg, &md);
|
|
m = md_to_m(mn, md);
|
|
n = ns_m_to_n(mn, ns, m);
|
|
/* MN counter mode is in hw.enable_reg sometimes */
|
|
if (rcg->clkr.enable_reg != rcg->ns_reg)
|
|
regmap_read(rcg->clkr.regmap, rcg->clkr.enable_reg, &mode);
|
|
else
|
|
mode = ns;
|
|
mode = reg_to_mnctr_mode(mn, mode);
|
|
}
|
|
|
|
return calc_rate(parent_rate, m, n, mode, pre_div);
|
|
}
|
|
|
|
static unsigned long
|
|
clk_dyn_rcg_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
|
|
{
|
|
struct clk_dyn_rcg *rcg = to_clk_dyn_rcg(hw);
|
|
u32 m, n, pre_div, ns, md, mode, reg;
|
|
int bank;
|
|
struct mn *mn;
|
|
bool banked_p = !!rcg->p[1].pre_div_width;
|
|
bool banked_mn = !!rcg->mn[1].width;
|
|
|
|
regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
|
|
bank = reg_to_bank(rcg, reg);
|
|
|
|
regmap_read(rcg->clkr.regmap, rcg->ns_reg[bank], &ns);
|
|
m = n = pre_div = mode = 0;
|
|
|
|
if (banked_mn) {
|
|
mn = &rcg->mn[bank];
|
|
regmap_read(rcg->clkr.regmap, rcg->md_reg[bank], &md);
|
|
m = md_to_m(mn, md);
|
|
n = ns_m_to_n(mn, ns, m);
|
|
/* Two NS registers means mode control is in NS register */
|
|
if (rcg->ns_reg[0] != rcg->ns_reg[1])
|
|
reg = ns;
|
|
mode = reg_to_mnctr_mode(mn, reg);
|
|
}
|
|
|
|
if (banked_p)
|
|
pre_div = ns_to_pre_div(&rcg->p[bank], ns);
|
|
|
|
return calc_rate(parent_rate, m, n, mode, pre_div);
|
|
}
|
|
|
|
static int _freq_tbl_determine_rate(struct clk_hw *hw, const struct freq_tbl *f,
|
|
struct clk_rate_request *req,
|
|
const struct parent_map *parent_map)
|
|
{
|
|
unsigned long clk_flags, rate = req->rate;
|
|
struct clk_hw *p;
|
|
int index;
|
|
|
|
f = qcom_find_freq(f, rate);
|
|
if (!f)
|
|
return -EINVAL;
|
|
|
|
index = qcom_find_src_index(hw, parent_map, f->src);
|
|
if (index < 0)
|
|
return index;
|
|
|
|
clk_flags = clk_hw_get_flags(hw);
|
|
p = clk_hw_get_parent_by_index(hw, index);
|
|
if (clk_flags & CLK_SET_RATE_PARENT) {
|
|
rate = rate * f->pre_div;
|
|
if (f->n) {
|
|
u64 tmp = rate;
|
|
tmp = tmp * f->n;
|
|
do_div(tmp, f->m);
|
|
rate = tmp;
|
|
}
|
|
} else {
|
|
rate = clk_hw_get_rate(p);
|
|
}
|
|
req->best_parent_hw = p;
|
|
req->best_parent_rate = rate;
|
|
req->rate = f->freq;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int clk_rcg_determine_rate(struct clk_hw *hw,
|
|
struct clk_rate_request *req)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
|
|
return _freq_tbl_determine_rate(hw, rcg->freq_tbl, req,
|
|
rcg->s.parent_map);
|
|
}
|
|
|
|
static int clk_dyn_rcg_determine_rate(struct clk_hw *hw,
|
|
struct clk_rate_request *req)
|
|
{
|
|
struct clk_dyn_rcg *rcg = to_clk_dyn_rcg(hw);
|
|
u32 reg;
|
|
int bank;
|
|
struct src_sel *s;
|
|
|
|
regmap_read(rcg->clkr.regmap, rcg->bank_reg, ®);
|
|
bank = reg_to_bank(rcg, reg);
|
|
s = &rcg->s[bank];
|
|
|
|
return _freq_tbl_determine_rate(hw, rcg->freq_tbl, req, s->parent_map);
|
|
}
|
|
|
|
static int clk_rcg_bypass_determine_rate(struct clk_hw *hw,
|
|
struct clk_rate_request *req)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
const struct freq_tbl *f = rcg->freq_tbl;
|
|
struct clk_hw *p;
|
|
int index = qcom_find_src_index(hw, rcg->s.parent_map, f->src);
|
|
|
|
req->best_parent_hw = p = clk_hw_get_parent_by_index(hw, index);
|
|
req->best_parent_rate = clk_hw_round_rate(p, req->rate);
|
|
req->rate = req->best_parent_rate;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __clk_rcg_set_rate(struct clk_rcg *rcg, const struct freq_tbl *f)
|
|
{
|
|
u32 ns, md, ctl;
|
|
struct mn *mn = &rcg->mn;
|
|
u32 mask = 0;
|
|
unsigned int reset_reg;
|
|
|
|
if (rcg->mn.reset_in_cc)
|
|
reset_reg = rcg->clkr.enable_reg;
|
|
else
|
|
reset_reg = rcg->ns_reg;
|
|
|
|
if (rcg->mn.width) {
|
|
mask = BIT(mn->mnctr_reset_bit);
|
|
regmap_update_bits(rcg->clkr.regmap, reset_reg, mask, mask);
|
|
|
|
regmap_read(rcg->clkr.regmap, rcg->md_reg, &md);
|
|
md = mn_to_md(mn, f->m, f->n, md);
|
|
regmap_write(rcg->clkr.regmap, rcg->md_reg, md);
|
|
|
|
regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
|
|
/* MN counter mode is in hw.enable_reg sometimes */
|
|
if (rcg->clkr.enable_reg != rcg->ns_reg) {
|
|
regmap_read(rcg->clkr.regmap, rcg->clkr.enable_reg, &ctl);
|
|
ctl = mn_to_reg(mn, f->m, f->n, ctl);
|
|
regmap_write(rcg->clkr.regmap, rcg->clkr.enable_reg, ctl);
|
|
} else {
|
|
ns = mn_to_reg(mn, f->m, f->n, ns);
|
|
}
|
|
ns = mn_to_ns(mn, f->m, f->n, ns);
|
|
} else {
|
|
regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
|
|
}
|
|
|
|
ns = pre_div_to_ns(&rcg->p, f->pre_div - 1, ns);
|
|
regmap_write(rcg->clkr.regmap, rcg->ns_reg, ns);
|
|
|
|
regmap_update_bits(rcg->clkr.regmap, reset_reg, mask, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int clk_rcg_set_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
const struct freq_tbl *f;
|
|
|
|
f = qcom_find_freq(rcg->freq_tbl, rate);
|
|
if (!f)
|
|
return -EINVAL;
|
|
|
|
return __clk_rcg_set_rate(rcg, f);
|
|
}
|
|
|
|
static int clk_rcg_bypass_set_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
|
|
return __clk_rcg_set_rate(rcg, rcg->freq_tbl);
|
|
}
|
|
|
|
static int clk_rcg_bypass2_determine_rate(struct clk_hw *hw,
|
|
struct clk_rate_request *req)
|
|
{
|
|
struct clk_hw *p;
|
|
|
|
p = req->best_parent_hw;
|
|
req->best_parent_rate = clk_hw_round_rate(p, req->rate);
|
|
req->rate = req->best_parent_rate;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int clk_rcg_bypass2_set_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
struct freq_tbl f = { 0 };
|
|
u32 ns, src;
|
|
int i, ret, num_parents = clk_hw_get_num_parents(hw);
|
|
|
|
ret = regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
|
|
if (ret)
|
|
return ret;
|
|
|
|
src = ns_to_src(&rcg->s, ns);
|
|
f.pre_div = ns_to_pre_div(&rcg->p, ns) + 1;
|
|
|
|
for (i = 0; i < num_parents; i++) {
|
|
if (src == rcg->s.parent_map[i].cfg) {
|
|
f.src = rcg->s.parent_map[i].src;
|
|
return __clk_rcg_set_rate(rcg, &f);
|
|
}
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int clk_rcg_bypass2_set_rate_and_parent(struct clk_hw *hw,
|
|
unsigned long rate, unsigned long parent_rate, u8 index)
|
|
{
|
|
/* Read the hardware to determine parent during set_rate */
|
|
return clk_rcg_bypass2_set_rate(hw, rate, parent_rate);
|
|
}
|
|
|
|
struct frac_entry {
|
|
int num;
|
|
int den;
|
|
};
|
|
|
|
static const struct frac_entry pixel_table[] = {
|
|
{ 1, 2 },
|
|
{ 1, 3 },
|
|
{ 3, 16 },
|
|
{ }
|
|
};
|
|
|
|
static int clk_rcg_pixel_determine_rate(struct clk_hw *hw,
|
|
struct clk_rate_request *req)
|
|
{
|
|
int delta = 100000;
|
|
const struct frac_entry *frac = pixel_table;
|
|
unsigned long request, src_rate;
|
|
|
|
for (; frac->num; frac++) {
|
|
request = (req->rate * frac->den) / frac->num;
|
|
|
|
src_rate = clk_hw_round_rate(req->best_parent_hw, request);
|
|
|
|
if ((src_rate < (request - delta)) ||
|
|
(src_rate > (request + delta)))
|
|
continue;
|
|
|
|
req->best_parent_rate = src_rate;
|
|
req->rate = (src_rate * frac->num) / frac->den;
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int clk_rcg_pixel_set_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
int delta = 100000;
|
|
const struct frac_entry *frac = pixel_table;
|
|
unsigned long request;
|
|
struct freq_tbl f = { 0 };
|
|
u32 ns, src;
|
|
int i, ret, num_parents = clk_hw_get_num_parents(hw);
|
|
|
|
ret = regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
|
|
if (ret)
|
|
return ret;
|
|
|
|
src = ns_to_src(&rcg->s, ns);
|
|
f.pre_div = ns_to_pre_div(&rcg->p, ns) + 1;
|
|
|
|
for (i = 0; i < num_parents; i++) {
|
|
if (src == rcg->s.parent_map[i].cfg) {
|
|
f.src = rcg->s.parent_map[i].src;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* let us find appropriate m/n values for this */
|
|
for (; frac->num; frac++) {
|
|
request = (rate * frac->den) / frac->num;
|
|
|
|
if ((parent_rate < (request - delta)) ||
|
|
(parent_rate > (request + delta)))
|
|
continue;
|
|
|
|
f.m = frac->num;
|
|
f.n = frac->den;
|
|
|
|
return __clk_rcg_set_rate(rcg, &f);
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int clk_rcg_pixel_set_rate_and_parent(struct clk_hw *hw,
|
|
unsigned long rate, unsigned long parent_rate, u8 index)
|
|
{
|
|
return clk_rcg_pixel_set_rate(hw, rate, parent_rate);
|
|
}
|
|
|
|
static int clk_rcg_esc_determine_rate(struct clk_hw *hw,
|
|
struct clk_rate_request *req)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
int pre_div_max = BIT(rcg->p.pre_div_width);
|
|
int div;
|
|
unsigned long src_rate;
|
|
|
|
if (req->rate == 0)
|
|
return -EINVAL;
|
|
|
|
src_rate = clk_hw_get_rate(req->best_parent_hw);
|
|
|
|
div = src_rate / req->rate;
|
|
|
|
if (div >= 1 && div <= pre_div_max) {
|
|
req->best_parent_rate = src_rate;
|
|
req->rate = src_rate / div;
|
|
return 0;
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int clk_rcg_esc_set_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
struct freq_tbl f = { 0 };
|
|
int pre_div_max = BIT(rcg->p.pre_div_width);
|
|
int div;
|
|
u32 ns;
|
|
int i, ret, num_parents = clk_hw_get_num_parents(hw);
|
|
|
|
if (rate == 0)
|
|
return -EINVAL;
|
|
|
|
ret = regmap_read(rcg->clkr.regmap, rcg->ns_reg, &ns);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ns = ns_to_src(&rcg->s, ns);
|
|
|
|
for (i = 0; i < num_parents; i++) {
|
|
if (ns == rcg->s.parent_map[i].cfg) {
|
|
f.src = rcg->s.parent_map[i].src;
|
|
break;
|
|
}
|
|
}
|
|
|
|
div = parent_rate / rate;
|
|
|
|
if (div >= 1 && div <= pre_div_max) {
|
|
f.pre_div = div;
|
|
return __clk_rcg_set_rate(rcg, &f);
|
|
}
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int clk_rcg_esc_set_rate_and_parent(struct clk_hw *hw,
|
|
unsigned long rate, unsigned long parent_rate, u8 index)
|
|
{
|
|
return clk_rcg_esc_set_rate(hw, rate, parent_rate);
|
|
}
|
|
|
|
/*
|
|
* This type of clock has a glitch-free mux that switches between the output of
|
|
* the M/N counter and an always on clock source (XO). When clk_set_rate() is
|
|
* called we need to make sure that we don't switch to the M/N counter if it
|
|
* isn't clocking because the mux will get stuck and the clock will stop
|
|
* outputting a clock. This can happen if the framework isn't aware that this
|
|
* clock is on and so clk_set_rate() doesn't turn on the new parent. To fix
|
|
* this we switch the mux in the enable/disable ops and reprogram the M/N
|
|
* counter in the set_rate op. We also make sure to switch away from the M/N
|
|
* counter in set_rate if software thinks the clock is off.
|
|
*/
|
|
static int clk_rcg_lcc_set_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long parent_rate)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
const struct freq_tbl *f;
|
|
int ret;
|
|
u32 gfm = BIT(10);
|
|
|
|
f = qcom_find_freq(rcg->freq_tbl, rate);
|
|
if (!f)
|
|
return -EINVAL;
|
|
|
|
/* Switch to XO to avoid glitches */
|
|
regmap_update_bits(rcg->clkr.regmap, rcg->ns_reg, gfm, 0);
|
|
ret = __clk_rcg_set_rate(rcg, f);
|
|
/* Switch back to M/N if it's clocking */
|
|
if (__clk_is_enabled(hw->clk))
|
|
regmap_update_bits(rcg->clkr.regmap, rcg->ns_reg, gfm, gfm);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int clk_rcg_lcc_enable(struct clk_hw *hw)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
u32 gfm = BIT(10);
|
|
|
|
/* Use M/N */
|
|
return regmap_update_bits(rcg->clkr.regmap, rcg->ns_reg, gfm, gfm);
|
|
}
|
|
|
|
static void clk_rcg_lcc_disable(struct clk_hw *hw)
|
|
{
|
|
struct clk_rcg *rcg = to_clk_rcg(hw);
|
|
u32 gfm = BIT(10);
|
|
|
|
/* Use XO */
|
|
regmap_update_bits(rcg->clkr.regmap, rcg->ns_reg, gfm, 0);
|
|
}
|
|
|
|
static int __clk_dyn_rcg_set_rate(struct clk_hw *hw, unsigned long rate)
|
|
{
|
|
struct clk_dyn_rcg *rcg = to_clk_dyn_rcg(hw);
|
|
const struct freq_tbl *f;
|
|
|
|
f = qcom_find_freq(rcg->freq_tbl, rate);
|
|
if (!f)
|
|
return -EINVAL;
|
|
|
|
return configure_bank(rcg, f);
|
|
}
|
|
|
|
static int clk_dyn_rcg_set_rate(struct clk_hw *hw, unsigned long rate,
|
|
unsigned long parent_rate)
|
|
{
|
|
return __clk_dyn_rcg_set_rate(hw, rate);
|
|
}
|
|
|
|
static int clk_dyn_rcg_set_rate_and_parent(struct clk_hw *hw,
|
|
unsigned long rate, unsigned long parent_rate, u8 index)
|
|
{
|
|
return __clk_dyn_rcg_set_rate(hw, rate);
|
|
}
|
|
|
|
const struct clk_ops clk_rcg_ops = {
|
|
.enable = clk_enable_regmap,
|
|
.disable = clk_disable_regmap,
|
|
.get_parent = clk_rcg_get_parent,
|
|
.set_parent = clk_rcg_set_parent,
|
|
.recalc_rate = clk_rcg_recalc_rate,
|
|
.determine_rate = clk_rcg_determine_rate,
|
|
.set_rate = clk_rcg_set_rate,
|
|
};
|
|
EXPORT_SYMBOL_GPL(clk_rcg_ops);
|
|
|
|
const struct clk_ops clk_rcg_bypass_ops = {
|
|
.enable = clk_enable_regmap,
|
|
.disable = clk_disable_regmap,
|
|
.get_parent = clk_rcg_get_parent,
|
|
.set_parent = clk_rcg_set_parent,
|
|
.recalc_rate = clk_rcg_recalc_rate,
|
|
.determine_rate = clk_rcg_bypass_determine_rate,
|
|
.set_rate = clk_rcg_bypass_set_rate,
|
|
};
|
|
EXPORT_SYMBOL_GPL(clk_rcg_bypass_ops);
|
|
|
|
const struct clk_ops clk_rcg_bypass2_ops = {
|
|
.enable = clk_enable_regmap,
|
|
.disable = clk_disable_regmap,
|
|
.get_parent = clk_rcg_get_parent,
|
|
.set_parent = clk_rcg_set_parent,
|
|
.recalc_rate = clk_rcg_recalc_rate,
|
|
.determine_rate = clk_rcg_bypass2_determine_rate,
|
|
.set_rate = clk_rcg_bypass2_set_rate,
|
|
.set_rate_and_parent = clk_rcg_bypass2_set_rate_and_parent,
|
|
};
|
|
EXPORT_SYMBOL_GPL(clk_rcg_bypass2_ops);
|
|
|
|
const struct clk_ops clk_rcg_pixel_ops = {
|
|
.enable = clk_enable_regmap,
|
|
.disable = clk_disable_regmap,
|
|
.get_parent = clk_rcg_get_parent,
|
|
.set_parent = clk_rcg_set_parent,
|
|
.recalc_rate = clk_rcg_recalc_rate,
|
|
.determine_rate = clk_rcg_pixel_determine_rate,
|
|
.set_rate = clk_rcg_pixel_set_rate,
|
|
.set_rate_and_parent = clk_rcg_pixel_set_rate_and_parent,
|
|
};
|
|
EXPORT_SYMBOL_GPL(clk_rcg_pixel_ops);
|
|
|
|
const struct clk_ops clk_rcg_esc_ops = {
|
|
.enable = clk_enable_regmap,
|
|
.disable = clk_disable_regmap,
|
|
.get_parent = clk_rcg_get_parent,
|
|
.set_parent = clk_rcg_set_parent,
|
|
.recalc_rate = clk_rcg_recalc_rate,
|
|
.determine_rate = clk_rcg_esc_determine_rate,
|
|
.set_rate = clk_rcg_esc_set_rate,
|
|
.set_rate_and_parent = clk_rcg_esc_set_rate_and_parent,
|
|
};
|
|
EXPORT_SYMBOL_GPL(clk_rcg_esc_ops);
|
|
|
|
const struct clk_ops clk_rcg_lcc_ops = {
|
|
.enable = clk_rcg_lcc_enable,
|
|
.disable = clk_rcg_lcc_disable,
|
|
.get_parent = clk_rcg_get_parent,
|
|
.set_parent = clk_rcg_set_parent,
|
|
.recalc_rate = clk_rcg_recalc_rate,
|
|
.determine_rate = clk_rcg_determine_rate,
|
|
.set_rate = clk_rcg_lcc_set_rate,
|
|
};
|
|
EXPORT_SYMBOL_GPL(clk_rcg_lcc_ops);
|
|
|
|
const struct clk_ops clk_dyn_rcg_ops = {
|
|
.enable = clk_enable_regmap,
|
|
.is_enabled = clk_is_enabled_regmap,
|
|
.disable = clk_disable_regmap,
|
|
.get_parent = clk_dyn_rcg_get_parent,
|
|
.set_parent = clk_dyn_rcg_set_parent,
|
|
.recalc_rate = clk_dyn_rcg_recalc_rate,
|
|
.determine_rate = clk_dyn_rcg_determine_rate,
|
|
.set_rate = clk_dyn_rcg_set_rate,
|
|
.set_rate_and_parent = clk_dyn_rcg_set_rate_and_parent,
|
|
};
|
|
EXPORT_SYMBOL_GPL(clk_dyn_rcg_ops);
|