Commit 9741b1a6 authored by James Liao's avatar James Liao Committed by Stephen Boyd

clk: mediatek: Add initial common clock support for Mediatek SoCs.

This patch adds common clock support for Mediatek SoCs, including plls,
muxes and clock gates.
Signed-off-by: default avatarJames Liao <jamesjj.liao@mediatek.com>
Signed-off-by: default avatarHenry Chen <henryc.chen@mediatek.com>
Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
[sboyd@codeaurora.org: Squelch checkpatch warning in clk-mtk.h]
Signed-off-by: default avatarStephen Boyd <sboyd@codeaurora.org>
parent 2893c379
...@@ -51,6 +51,7 @@ obj-$(CONFIG_ARCH_HI3xxx) += hisilicon/ ...@@ -51,6 +51,7 @@ obj-$(CONFIG_ARCH_HI3xxx) += hisilicon/
obj-$(CONFIG_ARCH_HIP04) += hisilicon/ obj-$(CONFIG_ARCH_HIP04) += hisilicon/
obj-$(CONFIG_ARCH_HIX5HD2) += hisilicon/ obj-$(CONFIG_ARCH_HIX5HD2) += hisilicon/
obj-$(CONFIG_COMMON_CLK_KEYSTONE) += keystone/ obj-$(CONFIG_COMMON_CLK_KEYSTONE) += keystone/
obj-$(CONFIG_ARCH_MEDIATEK) += mediatek/
ifeq ($(CONFIG_COMMON_CLK), y) ifeq ($(CONFIG_COMMON_CLK), y)
obj-$(CONFIG_ARCH_MMP) += mmp/ obj-$(CONFIG_ARCH_MMP) += mmp/
endif endif
......
obj-y += clk-mtk.o clk-pll.o clk-gate.o
/*
* Copyright (c) 2014 MediaTek Inc.
* Author: James Liao <jamesjj.liao@mediatek.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 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/of.h>
#include <linux/of_address.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/clkdev.h>
#include "clk-mtk.h"
#include "clk-gate.h"
static int mtk_cg_bit_is_cleared(struct clk_hw *hw)
{
struct mtk_clk_gate *cg = to_clk_gate(hw);
u32 val;
regmap_read(cg->regmap, cg->sta_ofs, &val);
val &= BIT(cg->bit);
return val == 0;
}
static int mtk_cg_bit_is_set(struct clk_hw *hw)
{
struct mtk_clk_gate *cg = to_clk_gate(hw);
u32 val;
regmap_read(cg->regmap, cg->sta_ofs, &val);
val &= BIT(cg->bit);
return val != 0;
}
static void mtk_cg_set_bit(struct clk_hw *hw)
{
struct mtk_clk_gate *cg = to_clk_gate(hw);
regmap_write(cg->regmap, cg->set_ofs, BIT(cg->bit));
}
static void mtk_cg_clr_bit(struct clk_hw *hw)
{
struct mtk_clk_gate *cg = to_clk_gate(hw);
regmap_write(cg->regmap, cg->clr_ofs, BIT(cg->bit));
}
static int mtk_cg_enable(struct clk_hw *hw)
{
mtk_cg_clr_bit(hw);
return 0;
}
static void mtk_cg_disable(struct clk_hw *hw)
{
mtk_cg_set_bit(hw);
}
static int mtk_cg_enable_inv(struct clk_hw *hw)
{
mtk_cg_set_bit(hw);
return 0;
}
static void mtk_cg_disable_inv(struct clk_hw *hw)
{
mtk_cg_clr_bit(hw);
}
const struct clk_ops mtk_clk_gate_ops_setclr = {
.is_enabled = mtk_cg_bit_is_cleared,
.enable = mtk_cg_enable,
.disable = mtk_cg_disable,
};
const struct clk_ops mtk_clk_gate_ops_setclr_inv = {
.is_enabled = mtk_cg_bit_is_set,
.enable = mtk_cg_enable_inv,
.disable = mtk_cg_disable_inv,
};
struct clk *mtk_clk_register_gate(
const char *name,
const char *parent_name,
struct regmap *regmap,
int set_ofs,
int clr_ofs,
int sta_ofs,
u8 bit,
const struct clk_ops *ops)
{
struct mtk_clk_gate *cg;
struct clk *clk;
struct clk_init_data init;
cg = kzalloc(sizeof(*cg), GFP_KERNEL);
if (!cg)
return ERR_PTR(-ENOMEM);
init.name = name;
init.flags = CLK_SET_RATE_PARENT;
init.parent_names = parent_name ? &parent_name : NULL;
init.num_parents = parent_name ? 1 : 0;
init.ops = ops;
cg->regmap = regmap;
cg->set_ofs = set_ofs;
cg->clr_ofs = clr_ofs;
cg->sta_ofs = sta_ofs;
cg->bit = bit;
cg->hw.init = &init;
clk = clk_register(NULL, &cg->hw);
if (IS_ERR(clk))
kfree(cg);
return clk;
}
/*
* Copyright (c) 2014 MediaTek Inc.
* Author: James Liao <jamesjj.liao@mediatek.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 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.
*/
#ifndef __DRV_CLK_GATE_H
#define __DRV_CLK_GATE_H
#include <linux/regmap.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
struct mtk_clk_gate {
struct clk_hw hw;
struct regmap *regmap;
int set_ofs;
int clr_ofs;
int sta_ofs;
u8 bit;
};
static inline struct mtk_clk_gate *to_clk_gate(struct clk_hw *hw)
{
return container_of(hw, struct mtk_clk_gate, hw);
}
extern const struct clk_ops mtk_clk_gate_ops_setclr;
extern const struct clk_ops mtk_clk_gate_ops_setclr_inv;
struct clk *mtk_clk_register_gate(
const char *name,
const char *parent_name,
struct regmap *regmap,
int set_ofs,
int clr_ofs,
int sta_ofs,
u8 bit,
const struct clk_ops *ops);
#endif /* __DRV_CLK_GATE_H */
/*
* Copyright (c) 2014 MediaTek Inc.
* Author: James Liao <jamesjj.liao@mediatek.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 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/of.h>
#include <linux/of_address.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/clkdev.h>
#include <linux/mfd/syscon.h>
#include "clk-mtk.h"
#include "clk-gate.h"
struct clk_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
{
int i;
struct clk_onecell_data *clk_data;
clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL);
if (!clk_data)
return NULL;
clk_data->clks = kcalloc(clk_num, sizeof(*clk_data->clks), GFP_KERNEL);
if (!clk_data->clks)
goto err_out;
clk_data->clk_num = clk_num;
for (i = 0; i < clk_num; i++)
clk_data->clks[i] = ERR_PTR(-ENOENT);
return clk_data;
err_out:
kfree(clk_data);
return NULL;
}
void mtk_clk_register_factors(const struct mtk_fixed_factor *clks, int num,
struct clk_onecell_data *clk_data)
{
int i;
struct clk *clk;
for (i = 0; i < num; i++) {
const struct mtk_fixed_factor *ff = &clks[i];
clk = clk_register_fixed_factor(NULL, ff->name, ff->parent_name,
CLK_SET_RATE_PARENT, ff->mult, ff->div);
if (IS_ERR(clk)) {
pr_err("Failed to register clk %s: %ld\n",
ff->name, PTR_ERR(clk));
continue;
}
if (clk_data)
clk_data->clks[ff->id] = clk;
}
}
int mtk_clk_register_gates(struct device_node *node, const struct mtk_gate *clks,
int num, struct clk_onecell_data *clk_data)
{
int i;
struct clk *clk;
struct regmap *regmap;
if (!clk_data)
return -ENOMEM;
regmap = syscon_node_to_regmap(node);
if (IS_ERR(regmap)) {
pr_err("Cannot find regmap for %s: %ld\n", node->full_name,
PTR_ERR(regmap));
return PTR_ERR(regmap);
}
for (i = 0; i < num; i++) {
const struct mtk_gate *gate = &clks[i];
clk = mtk_clk_register_gate(gate->name, gate->parent_name,
regmap,
gate->regs->set_ofs,
gate->regs->clr_ofs,
gate->regs->sta_ofs,
gate->shift, gate->ops);
if (IS_ERR(clk)) {
pr_err("Failed to register clk %s: %ld\n",
gate->name, PTR_ERR(clk));
continue;
}
clk_data->clks[gate->id] = clk;
}
return 0;
}
struct clk *mtk_clk_register_composite(const struct mtk_composite *mc,
void __iomem *base, spinlock_t *lock)
{
struct clk *clk;
struct clk_mux *mux = NULL;
struct clk_gate *gate = NULL;
struct clk_divider *div = NULL;
struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
const char * const *parent_names;
const char *parent;
int num_parents;
int ret;
if (mc->mux_shift >= 0) {
mux = kzalloc(sizeof(*mux), GFP_KERNEL);
if (!mux)
return ERR_PTR(-ENOMEM);
mux->reg = base + mc->mux_reg;
mux->mask = BIT(mc->mux_width) - 1;
mux->shift = mc->mux_shift;
mux->lock = lock;
mux_hw = &mux->hw;
mux_ops = &clk_mux_ops;
parent_names = mc->parent_names;
num_parents = mc->num_parents;
} else {
parent = mc->parent;
parent_names = &parent;
num_parents = 1;
}
if (mc->gate_shift >= 0) {
gate = kzalloc(sizeof(*gate), GFP_KERNEL);
if (!gate) {
ret = -ENOMEM;
goto err_out;
}
gate->reg = base + mc->gate_reg;
gate->bit_idx = mc->gate_shift;
gate->flags = CLK_GATE_SET_TO_DISABLE;
gate->lock = lock;
gate_hw = &gate->hw;
gate_ops = &clk_gate_ops;
}
if (mc->divider_shift >= 0) {
div = kzalloc(sizeof(*div), GFP_KERNEL);
if (!div) {
ret = -ENOMEM;
goto err_out;
}
div->reg = base + mc->divider_reg;
div->shift = mc->divider_shift;
div->width = mc->divider_width;
div->lock = lock;
div_hw = &div->hw;
div_ops = &clk_divider_ops;
}
clk = clk_register_composite(NULL, mc->name, parent_names, num_parents,
mux_hw, mux_ops,
div_hw, div_ops,
gate_hw, gate_ops,
mc->flags);
if (IS_ERR(clk)) {
kfree(gate);
kfree(mux);
}
return clk;
err_out:
kfree(mux);
return ERR_PTR(ret);
}
void mtk_clk_register_composites(const struct mtk_composite *mcs,
int num, void __iomem *base, spinlock_t *lock,
struct clk_onecell_data *clk_data)
{
struct clk *clk;
int i;
for (i = 0; i < num; i++) {
const struct mtk_composite *mc = &mcs[i];
clk = mtk_clk_register_composite(mc, base, lock);
if (IS_ERR(clk)) {
pr_err("Failed to register clk %s: %ld\n",
mc->name, PTR_ERR(clk));
continue;
}
if (clk_data)
clk_data->clks[mc->id] = clk;
}
}
/*
* Copyright (c) 2014 MediaTek Inc.
* Author: James Liao <jamesjj.liao@mediatek.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 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.
*/
#ifndef __DRV_CLK_MTK_H
#define __DRV_CLK_MTK_H
#include <linux/regmap.h>
#include <linux/bitops.h>
#include <linux/clk.h>
#include <linux/clk-provider.h>
#define MAX_MUX_GATE_BIT 31
#define INVALID_MUX_GATE_BIT (MAX_MUX_GATE_BIT + 1)
#define MHZ (1000 * 1000)
struct mtk_fixed_factor {
int id;
const char *name;
const char *parent_name;
int mult;
int div;
};
#define FACTOR(_id, _name, _parent, _mult, _div) { \
.id = _id, \
.name = _name, \
.parent_name = _parent, \
.mult = _mult, \
.div = _div, \
}
extern void mtk_clk_register_factors(const struct mtk_fixed_factor *clks,
int num, struct clk_onecell_data *clk_data);
struct mtk_composite {
int id;
const char *name;
const char * const *parent_names;
const char *parent;
unsigned flags;
uint32_t mux_reg;
uint32_t divider_reg;
uint32_t gate_reg;
signed char mux_shift;
signed char mux_width;
signed char gate_shift;
signed char divider_shift;
signed char divider_width;
signed char num_parents;
};
#define MUX_GATE(_id, _name, _parents, _reg, _shift, _width, _gate) { \
.id = _id, \
.name = _name, \
.mux_reg = _reg, \
.mux_shift = _shift, \
.mux_width = _width, \
.gate_reg = _reg, \
.gate_shift = _gate, \
.divider_shift = -1, \
.parent_names = _parents, \
.num_parents = ARRAY_SIZE(_parents), \
.flags = CLK_SET_RATE_PARENT, \
}
#define MUX(_id, _name, _parents, _reg, _shift, _width) { \
.id = _id, \
.name = _name, \
.mux_reg = _reg, \
.mux_shift = _shift, \
.mux_width = _width, \
.gate_shift = -1, \
.divider_shift = -1, \
.parent_names = _parents, \
.num_parents = ARRAY_SIZE(_parents), \
.flags = CLK_SET_RATE_PARENT, \
}
#define DIV_GATE(_id, _name, _parent, _gate_reg, _gate_shift, _div_reg, _div_width, _div_shift) { \
.id = _id, \
.parent = _parent, \
.name = _name, \
.divider_reg = _div_reg, \
.divider_shift = _div_shift, \
.divider_width = _div_width, \
.gate_reg = _gate_reg, \
.gate_shift = _gate_shift, \
.mux_shift = -1, \
.flags = 0, \
}
struct clk *mtk_clk_register_composite(const struct mtk_composite *mc,
void __iomem *base, spinlock_t *lock);
void mtk_clk_register_composites(const struct mtk_composite *mcs,
int num, void __iomem *base, spinlock_t *lock,
struct clk_onecell_data *clk_data);
struct mtk_gate_regs {
u32 sta_ofs;
u32 clr_ofs;
u32 set_ofs;
};
struct mtk_gate {
int id;
const char *name;
const char *parent_name;
const struct mtk_gate_regs *regs;
int shift;
const struct clk_ops *ops;
};
int mtk_clk_register_gates(struct device_node *node, const struct mtk_gate *clks,
int num, struct clk_onecell_data *clk_data);
struct clk_onecell_data *mtk_alloc_clk_data(unsigned int clk_num);
#define HAVE_RST_BAR BIT(0)
struct mtk_pll_data {
int id;
const char *name;
uint32_t reg;
uint32_t pwr_reg;
uint32_t en_mask;
uint32_t pd_reg;
uint32_t tuner_reg;
int pd_shift;
unsigned int flags;
const struct clk_ops *ops;
u32 rst_bar_mask;
unsigned long fmax;
int pcwbits;
uint32_t pcw_reg;
int pcw_shift;
};
void __init mtk_clk_register_plls(struct device_node *node,
const struct mtk_pll_data *plls, int num_plls,
struct clk_onecell_data *clk_data);
#endif /* __DRV_CLK_MTK_H */
/*
* Copyright (c) 2014 MediaTek Inc.
* Author: James Liao <jamesjj.liao@mediatek.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 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/of.h>
#include <linux/of_address.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/clkdev.h>
#include <linux/delay.h>
#include "clk-mtk.h"
#define REG_CON0 0
#define REG_CON1 4
#define CON0_BASE_EN BIT(0)
#define CON0_PWR_ON BIT(0)
#define CON0_ISO_EN BIT(1)
#define CON0_PCW_CHG BIT(31)
#define AUDPLL_TUNER_EN BIT(31)
#define POSTDIV_MASK 0x7
#define INTEGER_BITS 7
/*
* MediaTek PLLs are configured through their pcw value. The pcw value describes
* a divider in the PLL feedback loop which consists of 7 bits for the integer
* part and the remaining bits (if present) for the fractional part. Also they
* have a 3 bit power-of-two post divider.
*/
struct mtk_clk_pll {
struct clk_hw hw;
void __iomem *base_addr;
void __iomem *pd_addr;
void __iomem *pwr_addr;
void __iomem *tuner_addr;
void __iomem *pcw_addr;
const struct mtk_pll_data *data;
};
static inline struct mtk_clk_pll *to_mtk_clk_pll(struct clk_hw *hw)
{
return container_of(hw, struct mtk_clk_pll, hw);
}
static int mtk_pll_is_prepared(struct clk_hw *hw)
{
struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
return (readl(pll->base_addr + REG_CON0) & CON0_BASE_EN) != 0;
}
static unsigned long __mtk_pll_recalc_rate(struct mtk_clk_pll *pll, u32 fin,
u32 pcw, int postdiv)
{
int pcwbits = pll->data->pcwbits;
int pcwfbits;
u64 vco;
u8 c = 0;
/* The fractional part of the PLL divider. */
pcwfbits = pcwbits > INTEGER_BITS ? pcwbits - INTEGER_BITS : 0;
vco = (u64)fin * pcw;
if (pcwfbits && (vco & GENMASK(pcwfbits - 1, 0)))
c = 1;
vco >>= pcwfbits;
if (c)
vco++;
return ((unsigned long)vco + postdiv - 1) / postdiv;
}
static void mtk_pll_set_rate_regs(struct mtk_clk_pll *pll, u32 pcw,
int postdiv)
{
u32 con1, pd, val;
int pll_en;
/* set postdiv */
pd = readl(pll->pd_addr);
pd &= ~(POSTDIV_MASK << pll->data->pd_shift);
pd |= (ffs(postdiv) - 1) << pll->data->pd_shift;
writel(pd, pll->pd_addr);
pll_en = readl(pll->base_addr + REG_CON0) & CON0_BASE_EN;
/* set pcw */
val = readl(pll->pcw_addr);
val &= ~GENMASK(pll->data->pcw_shift + pll->data->pcwbits - 1,
pll->data->pcw_shift);
val |= pcw << pll->data->pcw_shift;
writel(val, pll->pcw_addr);
con1 = readl(pll->base_addr + REG_CON1);
if (pll_en)
con1 |= CON0_PCW_CHG;
writel(con1, pll->base_addr + REG_CON1);
if (pll->tuner_addr)
writel(con1 + 1, pll->tuner_addr);
if (pll_en)
udelay(20);
}
/*
* mtk_pll_calc_values - calculate good values for a given input frequency.
* @pll: The pll
* @pcw: The pcw value (output)
* @postdiv: The post divider (output)
* @freq: The desired target frequency
* @fin: The input frequency
*
*/
static void mtk_pll_calc_values(struct mtk_clk_pll *pll, u32 *pcw, u32 *postdiv,
u32 freq, u32 fin)
{
unsigned long fmin = 1000 * MHZ;
u64 _pcw;
u32 val;
if (freq > pll->data->fmax)
freq = pll->data->fmax;
for (val = 0; val < 4; val++) {
*postdiv = 1 << val;
if (freq * *postdiv >= fmin)
break;
}
/* _pcw = freq * postdiv / fin * 2^pcwfbits */
_pcw = ((u64)freq << val) << (pll->data->pcwbits - INTEGER_BITS);
do_div(_pcw, fin);
*pcw = (u32)_pcw;
}
static int mtk_pll_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
u32 pcw = 0;
u32 postdiv;
mtk_pll_calc_values(pll, &pcw, &postdiv, rate, parent_rate);
mtk_pll_set_rate_regs(pll, pcw, postdiv);
return 0;
}
static unsigned long mtk_pll_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
u32 postdiv;
u32 pcw;
postdiv = (readl(pll->pd_addr) >> pll->data->pd_shift) & POSTDIV_MASK;
postdiv = 1 << postdiv;
pcw = readl(pll->pcw_addr) >> pll->data->pcw_shift;
pcw &= GENMASK(pll->data->pcwbits - 1, 0);
return __mtk_pll_recalc_rate(pll, parent_rate, pcw, postdiv);
}
static long mtk_pll_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
u32 pcw = 0;
int postdiv;
mtk_pll_calc_values(pll, &pcw, &postdiv, rate, *prate);
return __mtk_pll_recalc_rate(pll, *prate, pcw, postdiv);
}
static int mtk_pll_prepare(struct clk_hw *hw)
{
struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
u32 r;
r = readl(pll->pwr_addr) | CON0_PWR_ON;
writel(r, pll->pwr_addr);
udelay(1);
r = readl(pll->pwr_addr) & ~CON0_ISO_EN;
writel(r, pll->pwr_addr);
udelay(1);
r = readl(pll->base_addr + REG_CON0);
r |= pll->data->en_mask;
writel(r, pll->base_addr + REG_CON0);
if (pll->tuner_addr) {
r = readl(pll->tuner_addr) | AUDPLL_TUNER_EN;
writel(r, pll->tuner_addr);
}
udelay(20);
if (pll->data->flags & HAVE_RST_BAR) {
r = readl(pll->base_addr + REG_CON0);
r |= pll->data->rst_bar_mask;
writel(r, pll->base_addr + REG_CON0);
}
return 0;
}
static void mtk_pll_unprepare(struct clk_hw *hw)
{
struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
u32 r;
if (pll->data->flags & HAVE_RST_BAR) {
r = readl(pll->base_addr + REG_CON0);
r &= ~pll->data->rst_bar_mask;
writel(r, pll->base_addr + REG_CON0);
}
if (pll->tuner_addr) {
r = readl(pll->tuner_addr) & ~AUDPLL_TUNER_EN;
writel(r, pll->tuner_addr);
}
r = readl(pll->base_addr + REG_CON0);
r &= ~CON0_BASE_EN;
writel(r, pll->base_addr + REG_CON0);
r = readl(pll->pwr_addr) | CON0_ISO_EN;
writel(r, pll->pwr_addr);
r = readl(pll->pwr_addr) & ~CON0_PWR_ON;
writel(r, pll->pwr_addr);
}
static const struct clk_ops mtk_pll_ops = {
.is_prepared = mtk_pll_is_prepared,
.prepare = mtk_pll_prepare,
.unprepare = mtk_pll_unprepare,
.recalc_rate = mtk_pll_recalc_rate,
.round_rate = mtk_pll_round_rate,
.set_rate = mtk_pll_set_rate,
};
static struct clk *mtk_clk_register_pll(const struct mtk_pll_data *data,
void __iomem *base)
{
struct mtk_clk_pll *pll;
struct clk_init_data init;
struct clk *clk;
const char *parent_name = "clk26m";
pll = kzalloc(sizeof(*pll), GFP_KERNEL);
if (!pll)
return ERR_PTR(-ENOMEM);
pll->base_addr = base + data->reg;
pll->pwr_addr = base + data->pwr_reg;
pll->pd_addr = base + data->pd_reg;
pll->pcw_addr = base + data->pcw_reg;
if (data->tuner_reg)
pll->tuner_addr = base + data->tuner_reg;
pll->hw.init = &init;
pll->data = data;
init.name = data->name;
init.ops = &mtk_pll_ops;
init.parent_names = &parent_name;
init.num_parents = 1;
clk = clk_register(NULL, &pll->hw);
if (IS_ERR(clk))
kfree(pll);
return clk;
}
void __init mtk_clk_register_plls(struct device_node *node,
const struct mtk_pll_data *plls, int num_plls, struct clk_onecell_data *clk_data)
{
void __iomem *base;
int r, i;
struct clk *clk;
base = of_iomap(node, 0);
if (!base) {
pr_err("%s(): ioremap failed\n", __func__);
return;
}
for (i = 0; i < num_plls; i++) {
const struct mtk_pll_data *pll = &plls[i];
clk = mtk_clk_register_pll(pll, base);
if (IS_ERR(clk)) {
pr_err("Failed to register clk %s: %ld\n",
pll->name, PTR_ERR(clk));
continue;
}
clk_data->clks[pll->id] = clk;
}
r = of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
if (r)
pr_err("%s(): could not register clock provider: %d\n",
__func__, r);
}
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment