![Heiko Stuebner](/assets/img/avatar_default.png)
Previously when everything happened in the set_rate callbacks itself we needed the old_rate value for the possible rate rollback, so that made it easy to also use it in the debug output. Now with the param-handling being done in separate functions, reading and recalculating the current pll rate only to use it in a debug message that won't get displayed in regular cases anyway is quite a waste. Therefore drop that value from the debug output. In the worst case that previous rate will have been displayed on the rate change before. Signed-off-by: Heiko Stuebner <heiko@sntech.de>
966 lines
28 KiB
C
966 lines
28 KiB
C
/*
|
|
* Copyright (c) 2014 MundoReader S.L.
|
|
* Author: Heiko Stuebner <heiko@sntech.de>
|
|
*
|
|
* Copyright (c) 2015 Rockchip Electronics Co. Ltd.
|
|
* Author: Xing Zheng <zhengxing@rock-chips.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* 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 <asm/div64.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/io.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/clk.h>
|
|
#include "clk.h"
|
|
|
|
#define PLL_MODE_MASK 0x3
|
|
#define PLL_MODE_SLOW 0x0
|
|
#define PLL_MODE_NORM 0x1
|
|
#define PLL_MODE_DEEP 0x2
|
|
|
|
struct rockchip_clk_pll {
|
|
struct clk_hw hw;
|
|
|
|
struct clk_mux pll_mux;
|
|
const struct clk_ops *pll_mux_ops;
|
|
|
|
struct notifier_block clk_nb;
|
|
|
|
void __iomem *reg_base;
|
|
int lock_offset;
|
|
unsigned int lock_shift;
|
|
enum rockchip_pll_type type;
|
|
u8 flags;
|
|
const struct rockchip_pll_rate_table *rate_table;
|
|
unsigned int rate_count;
|
|
spinlock_t *lock;
|
|
|
|
struct rockchip_clk_provider *ctx;
|
|
};
|
|
|
|
#define to_rockchip_clk_pll(_hw) container_of(_hw, struct rockchip_clk_pll, hw)
|
|
#define to_rockchip_clk_pll_nb(nb) \
|
|
container_of(nb, struct rockchip_clk_pll, clk_nb)
|
|
|
|
static const struct rockchip_pll_rate_table *rockchip_get_pll_settings(
|
|
struct rockchip_clk_pll *pll, unsigned long rate)
|
|
{
|
|
const struct rockchip_pll_rate_table *rate_table = pll->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 long rockchip_pll_round_rate(struct clk_hw *hw,
|
|
unsigned long drate, unsigned long *prate)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
const struct rockchip_pll_rate_table *rate_table = pll->rate_table;
|
|
int i;
|
|
|
|
/* Assumming rate_table is in descending order */
|
|
for (i = 0; i < pll->rate_count; i++) {
|
|
if (drate >= rate_table[i].rate)
|
|
return rate_table[i].rate;
|
|
}
|
|
|
|
/* return minimum supported value */
|
|
return rate_table[i - 1].rate;
|
|
}
|
|
|
|
/*
|
|
* Wait for the pll to reach the locked state.
|
|
* The calling set_rate function is responsible for making sure the
|
|
* grf regmap is available.
|
|
*/
|
|
static int rockchip_pll_wait_lock(struct rockchip_clk_pll *pll)
|
|
{
|
|
struct regmap *grf = pll->ctx->grf;
|
|
unsigned int val;
|
|
int delay = 24000000, ret;
|
|
|
|
while (delay > 0) {
|
|
ret = regmap_read(grf, pll->lock_offset, &val);
|
|
if (ret) {
|
|
pr_err("%s: failed to read pll lock status: %d\n",
|
|
__func__, ret);
|
|
return ret;
|
|
}
|
|
|
|
if (val & BIT(pll->lock_shift))
|
|
return 0;
|
|
delay--;
|
|
}
|
|
|
|
pr_err("%s: timeout waiting for pll to lock\n", __func__);
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/**
|
|
* PLL used in RK3036
|
|
*/
|
|
|
|
#define RK3036_PLLCON(i) (i * 0x4)
|
|
#define RK3036_PLLCON0_FBDIV_MASK 0xfff
|
|
#define RK3036_PLLCON0_FBDIV_SHIFT 0
|
|
#define RK3036_PLLCON0_POSTDIV1_MASK 0x7
|
|
#define RK3036_PLLCON0_POSTDIV1_SHIFT 12
|
|
#define RK3036_PLLCON1_REFDIV_MASK 0x3f
|
|
#define RK3036_PLLCON1_REFDIV_SHIFT 0
|
|
#define RK3036_PLLCON1_POSTDIV2_MASK 0x7
|
|
#define RK3036_PLLCON1_POSTDIV2_SHIFT 6
|
|
#define RK3036_PLLCON1_DSMPD_MASK 0x1
|
|
#define RK3036_PLLCON1_DSMPD_SHIFT 12
|
|
#define RK3036_PLLCON2_FRAC_MASK 0xffffff
|
|
#define RK3036_PLLCON2_FRAC_SHIFT 0
|
|
|
|
#define RK3036_PLLCON1_PWRDOWN (1 << 13)
|
|
|
|
static void rockchip_rk3036_pll_get_params(struct rockchip_clk_pll *pll,
|
|
struct rockchip_pll_rate_table *rate)
|
|
{
|
|
u32 pllcon;
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3036_PLLCON(0));
|
|
rate->fbdiv = ((pllcon >> RK3036_PLLCON0_FBDIV_SHIFT)
|
|
& RK3036_PLLCON0_FBDIV_MASK);
|
|
rate->postdiv1 = ((pllcon >> RK3036_PLLCON0_POSTDIV1_SHIFT)
|
|
& RK3036_PLLCON0_POSTDIV1_MASK);
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3036_PLLCON(1));
|
|
rate->refdiv = ((pllcon >> RK3036_PLLCON1_REFDIV_SHIFT)
|
|
& RK3036_PLLCON1_REFDIV_MASK);
|
|
rate->postdiv2 = ((pllcon >> RK3036_PLLCON1_POSTDIV2_SHIFT)
|
|
& RK3036_PLLCON1_POSTDIV2_MASK);
|
|
rate->dsmpd = ((pllcon >> RK3036_PLLCON1_DSMPD_SHIFT)
|
|
& RK3036_PLLCON1_DSMPD_MASK);
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3036_PLLCON(2));
|
|
rate->frac = ((pllcon >> RK3036_PLLCON2_FRAC_SHIFT)
|
|
& RK3036_PLLCON2_FRAC_MASK);
|
|
}
|
|
|
|
static unsigned long rockchip_rk3036_pll_recalc_rate(struct clk_hw *hw,
|
|
unsigned long prate)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
struct rockchip_pll_rate_table cur;
|
|
u64 rate64 = prate;
|
|
|
|
rockchip_rk3036_pll_get_params(pll, &cur);
|
|
|
|
rate64 *= cur.fbdiv;
|
|
do_div(rate64, cur.refdiv);
|
|
|
|
if (cur.dsmpd == 0) {
|
|
/* fractional mode */
|
|
u64 frac_rate64 = prate * cur.frac;
|
|
|
|
do_div(frac_rate64, cur.refdiv);
|
|
rate64 += frac_rate64 >> 24;
|
|
}
|
|
|
|
do_div(rate64, cur.postdiv1);
|
|
do_div(rate64, cur.postdiv2);
|
|
|
|
return (unsigned long)rate64;
|
|
}
|
|
|
|
static int rockchip_rk3036_pll_set_params(struct rockchip_clk_pll *pll,
|
|
const struct rockchip_pll_rate_table *rate)
|
|
{
|
|
const struct clk_ops *pll_mux_ops = pll->pll_mux_ops;
|
|
struct clk_mux *pll_mux = &pll->pll_mux;
|
|
struct rockchip_pll_rate_table cur;
|
|
u32 pllcon;
|
|
int rate_change_remuxed = 0;
|
|
int cur_parent;
|
|
int ret;
|
|
|
|
pr_debug("%s: rate settings for %lu fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
|
|
__func__, rate->rate, rate->fbdiv, rate->postdiv1, rate->refdiv,
|
|
rate->postdiv2, rate->dsmpd, rate->frac);
|
|
|
|
rockchip_rk3036_pll_get_params(pll, &cur);
|
|
cur.rate = 0;
|
|
|
|
cur_parent = pll_mux_ops->get_parent(&pll_mux->hw);
|
|
if (cur_parent == PLL_MODE_NORM) {
|
|
pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_SLOW);
|
|
rate_change_remuxed = 1;
|
|
}
|
|
|
|
/* update pll values */
|
|
writel_relaxed(HIWORD_UPDATE(rate->fbdiv, RK3036_PLLCON0_FBDIV_MASK,
|
|
RK3036_PLLCON0_FBDIV_SHIFT) |
|
|
HIWORD_UPDATE(rate->postdiv1, RK3036_PLLCON0_POSTDIV1_MASK,
|
|
RK3036_PLLCON0_POSTDIV1_SHIFT),
|
|
pll->reg_base + RK3036_PLLCON(0));
|
|
|
|
writel_relaxed(HIWORD_UPDATE(rate->refdiv, RK3036_PLLCON1_REFDIV_MASK,
|
|
RK3036_PLLCON1_REFDIV_SHIFT) |
|
|
HIWORD_UPDATE(rate->postdiv2, RK3036_PLLCON1_POSTDIV2_MASK,
|
|
RK3036_PLLCON1_POSTDIV2_SHIFT) |
|
|
HIWORD_UPDATE(rate->dsmpd, RK3036_PLLCON1_DSMPD_MASK,
|
|
RK3036_PLLCON1_DSMPD_SHIFT),
|
|
pll->reg_base + RK3036_PLLCON(1));
|
|
|
|
/* GPLL CON2 is not HIWORD_MASK */
|
|
pllcon = readl_relaxed(pll->reg_base + RK3036_PLLCON(2));
|
|
pllcon &= ~(RK3036_PLLCON2_FRAC_MASK << RK3036_PLLCON2_FRAC_SHIFT);
|
|
pllcon |= rate->frac << RK3036_PLLCON2_FRAC_SHIFT;
|
|
writel_relaxed(pllcon, pll->reg_base + RK3036_PLLCON(2));
|
|
|
|
/* wait for the pll to lock */
|
|
ret = rockchip_pll_wait_lock(pll);
|
|
if (ret) {
|
|
pr_warn("%s: pll update unsuccessful, trying to restore old params\n",
|
|
__func__);
|
|
rockchip_rk3036_pll_set_params(pll, &cur);
|
|
}
|
|
|
|
if (rate_change_remuxed)
|
|
pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_NORM);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rockchip_rk3036_pll_set_rate(struct clk_hw *hw, unsigned long drate,
|
|
unsigned long prate)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
const struct rockchip_pll_rate_table *rate;
|
|
|
|
pr_debug("%s: changing %s to %lu with a parent rate of %lu\n",
|
|
__func__, __clk_get_name(hw->clk), drate, prate);
|
|
|
|
/* Get required rate settings from table */
|
|
rate = rockchip_get_pll_settings(pll, drate);
|
|
if (!rate) {
|
|
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
|
|
drate, __clk_get_name(hw->clk));
|
|
return -EINVAL;
|
|
}
|
|
|
|
return rockchip_rk3036_pll_set_params(pll, rate);
|
|
}
|
|
|
|
static int rockchip_rk3036_pll_enable(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
|
|
writel(HIWORD_UPDATE(0, RK3036_PLLCON1_PWRDOWN, 0),
|
|
pll->reg_base + RK3036_PLLCON(1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rockchip_rk3036_pll_disable(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
|
|
writel(HIWORD_UPDATE(RK3036_PLLCON1_PWRDOWN,
|
|
RK3036_PLLCON1_PWRDOWN, 0),
|
|
pll->reg_base + RK3036_PLLCON(1));
|
|
}
|
|
|
|
static int rockchip_rk3036_pll_is_enabled(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
u32 pllcon = readl(pll->reg_base + RK3036_PLLCON(1));
|
|
|
|
return !(pllcon & RK3036_PLLCON1_PWRDOWN);
|
|
}
|
|
|
|
static void rockchip_rk3036_pll_init(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
const struct rockchip_pll_rate_table *rate;
|
|
struct rockchip_pll_rate_table cur;
|
|
unsigned long drate;
|
|
|
|
if (!(pll->flags & ROCKCHIP_PLL_SYNC_RATE))
|
|
return;
|
|
|
|
drate = clk_hw_get_rate(hw);
|
|
rate = rockchip_get_pll_settings(pll, drate);
|
|
|
|
/* when no rate setting for the current rate, rely on clk_set_rate */
|
|
if (!rate)
|
|
return;
|
|
|
|
rockchip_rk3036_pll_get_params(pll, &cur);
|
|
|
|
pr_debug("%s: pll %s@%lu: Hz\n", __func__, __clk_get_name(hw->clk),
|
|
drate);
|
|
pr_debug("old - fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
|
|
cur.fbdiv, cur.postdiv1, cur.refdiv, cur.postdiv2,
|
|
cur.dsmpd, cur.frac);
|
|
pr_debug("new - fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
|
|
rate->fbdiv, rate->postdiv1, rate->refdiv, rate->postdiv2,
|
|
rate->dsmpd, rate->frac);
|
|
|
|
if (rate->fbdiv != cur.fbdiv || rate->postdiv1 != cur.postdiv1 ||
|
|
rate->refdiv != cur.refdiv || rate->postdiv2 != cur.postdiv2 ||
|
|
rate->dsmpd != cur.dsmpd || rate->frac != cur.frac) {
|
|
struct clk *parent = clk_get_parent(hw->clk);
|
|
|
|
if (!parent) {
|
|
pr_warn("%s: parent of %s not available\n",
|
|
__func__, __clk_get_name(hw->clk));
|
|
return;
|
|
}
|
|
|
|
pr_debug("%s: pll %s: rate params do not match rate table, adjusting\n",
|
|
__func__, __clk_get_name(hw->clk));
|
|
rockchip_rk3036_pll_set_params(pll, rate);
|
|
}
|
|
}
|
|
|
|
static const struct clk_ops rockchip_rk3036_pll_clk_norate_ops = {
|
|
.recalc_rate = rockchip_rk3036_pll_recalc_rate,
|
|
.enable = rockchip_rk3036_pll_enable,
|
|
.disable = rockchip_rk3036_pll_disable,
|
|
.is_enabled = rockchip_rk3036_pll_is_enabled,
|
|
};
|
|
|
|
static const struct clk_ops rockchip_rk3036_pll_clk_ops = {
|
|
.recalc_rate = rockchip_rk3036_pll_recalc_rate,
|
|
.round_rate = rockchip_pll_round_rate,
|
|
.set_rate = rockchip_rk3036_pll_set_rate,
|
|
.enable = rockchip_rk3036_pll_enable,
|
|
.disable = rockchip_rk3036_pll_disable,
|
|
.is_enabled = rockchip_rk3036_pll_is_enabled,
|
|
.init = rockchip_rk3036_pll_init,
|
|
};
|
|
|
|
/**
|
|
* PLL used in RK3066, RK3188 and RK3288
|
|
*/
|
|
|
|
#define RK3066_PLL_RESET_DELAY(nr) ((nr * 500) / 24 + 1)
|
|
|
|
#define RK3066_PLLCON(i) (i * 0x4)
|
|
#define RK3066_PLLCON0_OD_MASK 0xf
|
|
#define RK3066_PLLCON0_OD_SHIFT 0
|
|
#define RK3066_PLLCON0_NR_MASK 0x3f
|
|
#define RK3066_PLLCON0_NR_SHIFT 8
|
|
#define RK3066_PLLCON1_NF_MASK 0x1fff
|
|
#define RK3066_PLLCON1_NF_SHIFT 0
|
|
#define RK3066_PLLCON2_NB_MASK 0xfff
|
|
#define RK3066_PLLCON2_NB_SHIFT 0
|
|
#define RK3066_PLLCON3_RESET (1 << 5)
|
|
#define RK3066_PLLCON3_PWRDOWN (1 << 1)
|
|
#define RK3066_PLLCON3_BYPASS (1 << 0)
|
|
|
|
static void rockchip_rk3066_pll_get_params(struct rockchip_clk_pll *pll,
|
|
struct rockchip_pll_rate_table *rate)
|
|
{
|
|
u32 pllcon;
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(0));
|
|
rate->nr = ((pllcon >> RK3066_PLLCON0_NR_SHIFT)
|
|
& RK3066_PLLCON0_NR_MASK) + 1;
|
|
rate->no = ((pllcon >> RK3066_PLLCON0_OD_SHIFT)
|
|
& RK3066_PLLCON0_OD_MASK) + 1;
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(1));
|
|
rate->nf = ((pllcon >> RK3066_PLLCON1_NF_SHIFT)
|
|
& RK3066_PLLCON1_NF_MASK) + 1;
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(2));
|
|
rate->nb = ((pllcon >> RK3066_PLLCON2_NB_SHIFT)
|
|
& RK3066_PLLCON2_NB_MASK) + 1;
|
|
}
|
|
|
|
static unsigned long rockchip_rk3066_pll_recalc_rate(struct clk_hw *hw,
|
|
unsigned long prate)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
struct rockchip_pll_rate_table cur;
|
|
u64 rate64 = prate;
|
|
u32 pllcon;
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3066_PLLCON(3));
|
|
if (pllcon & RK3066_PLLCON3_BYPASS) {
|
|
pr_debug("%s: pll %s is bypassed\n", __func__,
|
|
clk_hw_get_name(hw));
|
|
return prate;
|
|
}
|
|
|
|
rockchip_rk3066_pll_get_params(pll, &cur);
|
|
|
|
rate64 *= cur.nf;
|
|
do_div(rate64, cur.nr);
|
|
do_div(rate64, cur.no);
|
|
|
|
return (unsigned long)rate64;
|
|
}
|
|
|
|
static int rockchip_rk3066_pll_set_params(struct rockchip_clk_pll *pll,
|
|
const struct rockchip_pll_rate_table *rate)
|
|
{
|
|
const struct clk_ops *pll_mux_ops = pll->pll_mux_ops;
|
|
struct clk_mux *pll_mux = &pll->pll_mux;
|
|
struct rockchip_pll_rate_table cur;
|
|
int rate_change_remuxed = 0;
|
|
int cur_parent;
|
|
int ret;
|
|
|
|
pr_debug("%s: rate settings for %lu (nr, no, nf): (%d, %d, %d)\n",
|
|
__func__, rate->rate, rate->nr, rate->no, rate->nf);
|
|
|
|
rockchip_rk3066_pll_get_params(pll, &cur);
|
|
cur.rate = 0;
|
|
|
|
cur_parent = pll_mux_ops->get_parent(&pll_mux->hw);
|
|
if (cur_parent == PLL_MODE_NORM) {
|
|
pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_SLOW);
|
|
rate_change_remuxed = 1;
|
|
}
|
|
|
|
/* enter reset mode */
|
|
writel(HIWORD_UPDATE(RK3066_PLLCON3_RESET, RK3066_PLLCON3_RESET, 0),
|
|
pll->reg_base + RK3066_PLLCON(3));
|
|
|
|
/* update pll values */
|
|
writel(HIWORD_UPDATE(rate->nr - 1, RK3066_PLLCON0_NR_MASK,
|
|
RK3066_PLLCON0_NR_SHIFT) |
|
|
HIWORD_UPDATE(rate->no - 1, RK3066_PLLCON0_OD_MASK,
|
|
RK3066_PLLCON0_OD_SHIFT),
|
|
pll->reg_base + RK3066_PLLCON(0));
|
|
|
|
writel_relaxed(HIWORD_UPDATE(rate->nf - 1, RK3066_PLLCON1_NF_MASK,
|
|
RK3066_PLLCON1_NF_SHIFT),
|
|
pll->reg_base + RK3066_PLLCON(1));
|
|
writel_relaxed(HIWORD_UPDATE(rate->nb - 1, RK3066_PLLCON2_NB_MASK,
|
|
RK3066_PLLCON2_NB_SHIFT),
|
|
pll->reg_base + RK3066_PLLCON(2));
|
|
|
|
/* leave reset and wait the reset_delay */
|
|
writel(HIWORD_UPDATE(0, RK3066_PLLCON3_RESET, 0),
|
|
pll->reg_base + RK3066_PLLCON(3));
|
|
udelay(RK3066_PLL_RESET_DELAY(rate->nr));
|
|
|
|
/* wait for the pll to lock */
|
|
ret = rockchip_pll_wait_lock(pll);
|
|
if (ret) {
|
|
pr_warn("%s: pll update unsuccessful, trying to restore old params\n",
|
|
__func__);
|
|
rockchip_rk3066_pll_set_params(pll, &cur);
|
|
}
|
|
|
|
if (rate_change_remuxed)
|
|
pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_NORM);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rockchip_rk3066_pll_set_rate(struct clk_hw *hw, unsigned long drate,
|
|
unsigned long prate)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
const struct rockchip_pll_rate_table *rate;
|
|
|
|
pr_debug("%s: changing %s to %lu with a parent rate of %lu\n",
|
|
__func__, clk_hw_get_name(hw), drate, prate);
|
|
|
|
/* Get required rate settings from table */
|
|
rate = rockchip_get_pll_settings(pll, drate);
|
|
if (!rate) {
|
|
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
|
|
drate, clk_hw_get_name(hw));
|
|
return -EINVAL;
|
|
}
|
|
|
|
return rockchip_rk3066_pll_set_params(pll, rate);
|
|
}
|
|
|
|
static int rockchip_rk3066_pll_enable(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
|
|
writel(HIWORD_UPDATE(0, RK3066_PLLCON3_PWRDOWN, 0),
|
|
pll->reg_base + RK3066_PLLCON(3));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rockchip_rk3066_pll_disable(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
|
|
writel(HIWORD_UPDATE(RK3066_PLLCON3_PWRDOWN,
|
|
RK3066_PLLCON3_PWRDOWN, 0),
|
|
pll->reg_base + RK3066_PLLCON(3));
|
|
}
|
|
|
|
static int rockchip_rk3066_pll_is_enabled(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
u32 pllcon = readl(pll->reg_base + RK3066_PLLCON(3));
|
|
|
|
return !(pllcon & RK3066_PLLCON3_PWRDOWN);
|
|
}
|
|
|
|
static void rockchip_rk3066_pll_init(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
const struct rockchip_pll_rate_table *rate;
|
|
struct rockchip_pll_rate_table cur;
|
|
unsigned long drate;
|
|
|
|
if (!(pll->flags & ROCKCHIP_PLL_SYNC_RATE))
|
|
return;
|
|
|
|
drate = clk_hw_get_rate(hw);
|
|
rate = rockchip_get_pll_settings(pll, drate);
|
|
|
|
/* when no rate setting for the current rate, rely on clk_set_rate */
|
|
if (!rate)
|
|
return;
|
|
|
|
rockchip_rk3066_pll_get_params(pll, &cur);
|
|
|
|
pr_debug("%s: pll %s@%lu: nr (%d:%d); no (%d:%d); nf(%d:%d), nb(%d:%d)\n",
|
|
__func__, clk_hw_get_name(hw), drate, rate->nr, cur.nr,
|
|
rate->no, cur.no, rate->nf, cur.nf, rate->nb, cur.nb);
|
|
if (rate->nr != cur.nr || rate->no != cur.no || rate->nf != cur.nf
|
|
|| rate->nb != cur.nb) {
|
|
pr_debug("%s: pll %s: rate params do not match rate table, adjusting\n",
|
|
__func__, clk_hw_get_name(hw));
|
|
rockchip_rk3066_pll_set_params(pll, rate);
|
|
}
|
|
}
|
|
|
|
static const struct clk_ops rockchip_rk3066_pll_clk_norate_ops = {
|
|
.recalc_rate = rockchip_rk3066_pll_recalc_rate,
|
|
.enable = rockchip_rk3066_pll_enable,
|
|
.disable = rockchip_rk3066_pll_disable,
|
|
.is_enabled = rockchip_rk3066_pll_is_enabled,
|
|
};
|
|
|
|
static const struct clk_ops rockchip_rk3066_pll_clk_ops = {
|
|
.recalc_rate = rockchip_rk3066_pll_recalc_rate,
|
|
.round_rate = rockchip_pll_round_rate,
|
|
.set_rate = rockchip_rk3066_pll_set_rate,
|
|
.enable = rockchip_rk3066_pll_enable,
|
|
.disable = rockchip_rk3066_pll_disable,
|
|
.is_enabled = rockchip_rk3066_pll_is_enabled,
|
|
.init = rockchip_rk3066_pll_init,
|
|
};
|
|
|
|
/**
|
|
* PLL used in RK3399
|
|
*/
|
|
|
|
#define RK3399_PLLCON(i) (i * 0x4)
|
|
#define RK3399_PLLCON0_FBDIV_MASK 0xfff
|
|
#define RK3399_PLLCON0_FBDIV_SHIFT 0
|
|
#define RK3399_PLLCON1_REFDIV_MASK 0x3f
|
|
#define RK3399_PLLCON1_REFDIV_SHIFT 0
|
|
#define RK3399_PLLCON1_POSTDIV1_MASK 0x7
|
|
#define RK3399_PLLCON1_POSTDIV1_SHIFT 8
|
|
#define RK3399_PLLCON1_POSTDIV2_MASK 0x7
|
|
#define RK3399_PLLCON1_POSTDIV2_SHIFT 12
|
|
#define RK3399_PLLCON2_FRAC_MASK 0xffffff
|
|
#define RK3399_PLLCON2_FRAC_SHIFT 0
|
|
#define RK3399_PLLCON2_LOCK_STATUS BIT(31)
|
|
#define RK3399_PLLCON3_PWRDOWN BIT(0)
|
|
#define RK3399_PLLCON3_DSMPD_MASK 0x1
|
|
#define RK3399_PLLCON3_DSMPD_SHIFT 3
|
|
|
|
static int rockchip_rk3399_pll_wait_lock(struct rockchip_clk_pll *pll)
|
|
{
|
|
u32 pllcon;
|
|
int delay = 24000000;
|
|
|
|
/* poll check the lock status in rk3399 xPLLCON2 */
|
|
while (delay > 0) {
|
|
pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(2));
|
|
if (pllcon & RK3399_PLLCON2_LOCK_STATUS)
|
|
return 0;
|
|
|
|
delay--;
|
|
}
|
|
|
|
pr_err("%s: timeout waiting for pll to lock\n", __func__);
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
static void rockchip_rk3399_pll_get_params(struct rockchip_clk_pll *pll,
|
|
struct rockchip_pll_rate_table *rate)
|
|
{
|
|
u32 pllcon;
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(0));
|
|
rate->fbdiv = ((pllcon >> RK3399_PLLCON0_FBDIV_SHIFT)
|
|
& RK3399_PLLCON0_FBDIV_MASK);
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(1));
|
|
rate->refdiv = ((pllcon >> RK3399_PLLCON1_REFDIV_SHIFT)
|
|
& RK3399_PLLCON1_REFDIV_MASK);
|
|
rate->postdiv1 = ((pllcon >> RK3399_PLLCON1_POSTDIV1_SHIFT)
|
|
& RK3399_PLLCON1_POSTDIV1_MASK);
|
|
rate->postdiv2 = ((pllcon >> RK3399_PLLCON1_POSTDIV2_SHIFT)
|
|
& RK3399_PLLCON1_POSTDIV2_MASK);
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(2));
|
|
rate->frac = ((pllcon >> RK3399_PLLCON2_FRAC_SHIFT)
|
|
& RK3399_PLLCON2_FRAC_MASK);
|
|
|
|
pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(3));
|
|
rate->dsmpd = ((pllcon >> RK3399_PLLCON3_DSMPD_SHIFT)
|
|
& RK3399_PLLCON3_DSMPD_MASK);
|
|
}
|
|
|
|
static unsigned long rockchip_rk3399_pll_recalc_rate(struct clk_hw *hw,
|
|
unsigned long prate)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
struct rockchip_pll_rate_table cur;
|
|
u64 rate64 = prate;
|
|
|
|
rockchip_rk3399_pll_get_params(pll, &cur);
|
|
|
|
rate64 *= cur.fbdiv;
|
|
do_div(rate64, cur.refdiv);
|
|
|
|
if (cur.dsmpd == 0) {
|
|
/* fractional mode */
|
|
u64 frac_rate64 = prate * cur.frac;
|
|
|
|
do_div(frac_rate64, cur.refdiv);
|
|
rate64 += frac_rate64 >> 24;
|
|
}
|
|
|
|
do_div(rate64, cur.postdiv1);
|
|
do_div(rate64, cur.postdiv2);
|
|
|
|
return (unsigned long)rate64;
|
|
}
|
|
|
|
static int rockchip_rk3399_pll_set_params(struct rockchip_clk_pll *pll,
|
|
const struct rockchip_pll_rate_table *rate)
|
|
{
|
|
const struct clk_ops *pll_mux_ops = pll->pll_mux_ops;
|
|
struct clk_mux *pll_mux = &pll->pll_mux;
|
|
struct rockchip_pll_rate_table cur;
|
|
u32 pllcon;
|
|
int rate_change_remuxed = 0;
|
|
int cur_parent;
|
|
int ret;
|
|
|
|
pr_debug("%s: rate settings for %lu fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
|
|
__func__, rate->rate, rate->fbdiv, rate->postdiv1, rate->refdiv,
|
|
rate->postdiv2, rate->dsmpd, rate->frac);
|
|
|
|
rockchip_rk3399_pll_get_params(pll, &cur);
|
|
cur.rate = 0;
|
|
|
|
cur_parent = pll_mux_ops->get_parent(&pll_mux->hw);
|
|
if (cur_parent == PLL_MODE_NORM) {
|
|
pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_SLOW);
|
|
rate_change_remuxed = 1;
|
|
}
|
|
|
|
/* update pll values */
|
|
writel_relaxed(HIWORD_UPDATE(rate->fbdiv, RK3399_PLLCON0_FBDIV_MASK,
|
|
RK3399_PLLCON0_FBDIV_SHIFT),
|
|
pll->reg_base + RK3399_PLLCON(0));
|
|
|
|
writel_relaxed(HIWORD_UPDATE(rate->refdiv, RK3399_PLLCON1_REFDIV_MASK,
|
|
RK3399_PLLCON1_REFDIV_SHIFT) |
|
|
HIWORD_UPDATE(rate->postdiv1, RK3399_PLLCON1_POSTDIV1_MASK,
|
|
RK3399_PLLCON1_POSTDIV1_SHIFT) |
|
|
HIWORD_UPDATE(rate->postdiv2, RK3399_PLLCON1_POSTDIV2_MASK,
|
|
RK3399_PLLCON1_POSTDIV2_SHIFT),
|
|
pll->reg_base + RK3399_PLLCON(1));
|
|
|
|
/* xPLL CON2 is not HIWORD_MASK */
|
|
pllcon = readl_relaxed(pll->reg_base + RK3399_PLLCON(2));
|
|
pllcon &= ~(RK3399_PLLCON2_FRAC_MASK << RK3399_PLLCON2_FRAC_SHIFT);
|
|
pllcon |= rate->frac << RK3399_PLLCON2_FRAC_SHIFT;
|
|
writel_relaxed(pllcon, pll->reg_base + RK3399_PLLCON(2));
|
|
|
|
writel_relaxed(HIWORD_UPDATE(rate->dsmpd, RK3399_PLLCON3_DSMPD_MASK,
|
|
RK3399_PLLCON3_DSMPD_SHIFT),
|
|
pll->reg_base + RK3399_PLLCON(3));
|
|
|
|
/* wait for the pll to lock */
|
|
ret = rockchip_rk3399_pll_wait_lock(pll);
|
|
if (ret) {
|
|
pr_warn("%s: pll update unsuccessful, trying to restore old params\n",
|
|
__func__);
|
|
rockchip_rk3399_pll_set_params(pll, &cur);
|
|
}
|
|
|
|
if (rate_change_remuxed)
|
|
pll_mux_ops->set_parent(&pll_mux->hw, PLL_MODE_NORM);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rockchip_rk3399_pll_set_rate(struct clk_hw *hw, unsigned long drate,
|
|
unsigned long prate)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
const struct rockchip_pll_rate_table *rate;
|
|
|
|
pr_debug("%s: changing %s to %lu with a parent rate of %lu\n",
|
|
__func__, __clk_get_name(hw->clk), drate, prate);
|
|
|
|
/* Get required rate settings from table */
|
|
rate = rockchip_get_pll_settings(pll, drate);
|
|
if (!rate) {
|
|
pr_err("%s: Invalid rate : %lu for pll clk %s\n", __func__,
|
|
drate, __clk_get_name(hw->clk));
|
|
return -EINVAL;
|
|
}
|
|
|
|
return rockchip_rk3399_pll_set_params(pll, rate);
|
|
}
|
|
|
|
static int rockchip_rk3399_pll_enable(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
|
|
writel(HIWORD_UPDATE(0, RK3399_PLLCON3_PWRDOWN, 0),
|
|
pll->reg_base + RK3399_PLLCON(3));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rockchip_rk3399_pll_disable(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
|
|
writel(HIWORD_UPDATE(RK3399_PLLCON3_PWRDOWN,
|
|
RK3399_PLLCON3_PWRDOWN, 0),
|
|
pll->reg_base + RK3399_PLLCON(3));
|
|
}
|
|
|
|
static int rockchip_rk3399_pll_is_enabled(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
u32 pllcon = readl(pll->reg_base + RK3399_PLLCON(3));
|
|
|
|
return !(pllcon & RK3399_PLLCON3_PWRDOWN);
|
|
}
|
|
|
|
static void rockchip_rk3399_pll_init(struct clk_hw *hw)
|
|
{
|
|
struct rockchip_clk_pll *pll = to_rockchip_clk_pll(hw);
|
|
const struct rockchip_pll_rate_table *rate;
|
|
struct rockchip_pll_rate_table cur;
|
|
unsigned long drate;
|
|
|
|
if (!(pll->flags & ROCKCHIP_PLL_SYNC_RATE))
|
|
return;
|
|
|
|
drate = clk_hw_get_rate(hw);
|
|
rate = rockchip_get_pll_settings(pll, drate);
|
|
|
|
/* when no rate setting for the current rate, rely on clk_set_rate */
|
|
if (!rate)
|
|
return;
|
|
|
|
rockchip_rk3399_pll_get_params(pll, &cur);
|
|
|
|
pr_debug("%s: pll %s@%lu: Hz\n", __func__, __clk_get_name(hw->clk),
|
|
drate);
|
|
pr_debug("old - fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
|
|
cur.fbdiv, cur.postdiv1, cur.refdiv, cur.postdiv2,
|
|
cur.dsmpd, cur.frac);
|
|
pr_debug("new - fbdiv: %d, postdiv1: %d, refdiv: %d, postdiv2: %d, dsmpd: %d, frac: %d\n",
|
|
rate->fbdiv, rate->postdiv1, rate->refdiv, rate->postdiv2,
|
|
rate->dsmpd, rate->frac);
|
|
|
|
if (rate->fbdiv != cur.fbdiv || rate->postdiv1 != cur.postdiv1 ||
|
|
rate->refdiv != cur.refdiv || rate->postdiv2 != cur.postdiv2 ||
|
|
rate->dsmpd != cur.dsmpd || rate->frac != cur.frac) {
|
|
struct clk *parent = clk_get_parent(hw->clk);
|
|
|
|
if (!parent) {
|
|
pr_warn("%s: parent of %s not available\n",
|
|
__func__, __clk_get_name(hw->clk));
|
|
return;
|
|
}
|
|
|
|
pr_debug("%s: pll %s: rate params do not match rate table, adjusting\n",
|
|
__func__, __clk_get_name(hw->clk));
|
|
rockchip_rk3399_pll_set_params(pll, rate);
|
|
}
|
|
}
|
|
|
|
static const struct clk_ops rockchip_rk3399_pll_clk_norate_ops = {
|
|
.recalc_rate = rockchip_rk3399_pll_recalc_rate,
|
|
.enable = rockchip_rk3399_pll_enable,
|
|
.disable = rockchip_rk3399_pll_disable,
|
|
.is_enabled = rockchip_rk3399_pll_is_enabled,
|
|
};
|
|
|
|
static const struct clk_ops rockchip_rk3399_pll_clk_ops = {
|
|
.recalc_rate = rockchip_rk3399_pll_recalc_rate,
|
|
.round_rate = rockchip_pll_round_rate,
|
|
.set_rate = rockchip_rk3399_pll_set_rate,
|
|
.enable = rockchip_rk3399_pll_enable,
|
|
.disable = rockchip_rk3399_pll_disable,
|
|
.is_enabled = rockchip_rk3399_pll_is_enabled,
|
|
.init = rockchip_rk3399_pll_init,
|
|
};
|
|
|
|
/*
|
|
* Common registering of pll clocks
|
|
*/
|
|
|
|
struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx,
|
|
enum rockchip_pll_type pll_type,
|
|
const char *name, const char *const *parent_names,
|
|
u8 num_parents, int con_offset, int grf_lock_offset,
|
|
int lock_shift, int mode_offset, int mode_shift,
|
|
struct rockchip_pll_rate_table *rate_table,
|
|
u8 clk_pll_flags)
|
|
{
|
|
const char *pll_parents[3];
|
|
struct clk_init_data init;
|
|
struct rockchip_clk_pll *pll;
|
|
struct clk_mux *pll_mux;
|
|
struct clk *pll_clk, *mux_clk;
|
|
char pll_name[20];
|
|
|
|
if (num_parents != 2) {
|
|
pr_err("%s: needs two parent clocks\n", __func__);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
/* name the actual pll */
|
|
snprintf(pll_name, sizeof(pll_name), "pll_%s", name);
|
|
|
|
pll = kzalloc(sizeof(*pll), GFP_KERNEL);
|
|
if (!pll)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
/* create the mux on top of the real pll */
|
|
pll->pll_mux_ops = &clk_mux_ops;
|
|
pll_mux = &pll->pll_mux;
|
|
pll_mux->reg = ctx->reg_base + mode_offset;
|
|
pll_mux->shift = mode_shift;
|
|
pll_mux->mask = PLL_MODE_MASK;
|
|
pll_mux->flags = 0;
|
|
pll_mux->lock = &ctx->lock;
|
|
pll_mux->hw.init = &init;
|
|
|
|
if (pll_type == pll_rk3036 ||
|
|
pll_type == pll_rk3066 ||
|
|
pll_type == pll_rk3399)
|
|
pll_mux->flags |= CLK_MUX_HIWORD_MASK;
|
|
|
|
/* the actual muxing is xin24m, pll-output, xin32k */
|
|
pll_parents[0] = parent_names[0];
|
|
pll_parents[1] = pll_name;
|
|
pll_parents[2] = parent_names[1];
|
|
|
|
init.name = name;
|
|
init.flags = CLK_SET_RATE_PARENT;
|
|
init.ops = pll->pll_mux_ops;
|
|
init.parent_names = pll_parents;
|
|
init.num_parents = ARRAY_SIZE(pll_parents);
|
|
|
|
mux_clk = clk_register(NULL, &pll_mux->hw);
|
|
if (IS_ERR(mux_clk))
|
|
goto err_mux;
|
|
|
|
/* now create the actual pll */
|
|
init.name = pll_name;
|
|
|
|
/* keep all plls untouched for now */
|
|
init.flags = CLK_IGNORE_UNUSED;
|
|
|
|
init.parent_names = &parent_names[0];
|
|
init.num_parents = 1;
|
|
|
|
if (rate_table) {
|
|
int len;
|
|
|
|
/* find count of rates in rate_table */
|
|
for (len = 0; rate_table[len].rate != 0; )
|
|
len++;
|
|
|
|
pll->rate_count = len;
|
|
pll->rate_table = kmemdup(rate_table,
|
|
pll->rate_count *
|
|
sizeof(struct rockchip_pll_rate_table),
|
|
GFP_KERNEL);
|
|
WARN(!pll->rate_table,
|
|
"%s: could not allocate rate table for %s\n",
|
|
__func__, name);
|
|
}
|
|
|
|
switch (pll_type) {
|
|
case pll_rk3036:
|
|
if (!pll->rate_table || IS_ERR(ctx->grf))
|
|
init.ops = &rockchip_rk3036_pll_clk_norate_ops;
|
|
else
|
|
init.ops = &rockchip_rk3036_pll_clk_ops;
|
|
break;
|
|
case pll_rk3066:
|
|
if (!pll->rate_table || IS_ERR(ctx->grf))
|
|
init.ops = &rockchip_rk3066_pll_clk_norate_ops;
|
|
else
|
|
init.ops = &rockchip_rk3066_pll_clk_ops;
|
|
break;
|
|
case pll_rk3399:
|
|
if (!pll->rate_table)
|
|
init.ops = &rockchip_rk3399_pll_clk_norate_ops;
|
|
else
|
|
init.ops = &rockchip_rk3399_pll_clk_ops;
|
|
break;
|
|
default:
|
|
pr_warn("%s: Unknown pll type for pll clk %s\n",
|
|
__func__, name);
|
|
}
|
|
|
|
pll->hw.init = &init;
|
|
pll->type = pll_type;
|
|
pll->reg_base = ctx->reg_base + con_offset;
|
|
pll->lock_offset = grf_lock_offset;
|
|
pll->lock_shift = lock_shift;
|
|
pll->flags = clk_pll_flags;
|
|
pll->lock = &ctx->lock;
|
|
pll->ctx = ctx;
|
|
|
|
pll_clk = clk_register(NULL, &pll->hw);
|
|
if (IS_ERR(pll_clk)) {
|
|
pr_err("%s: failed to register pll clock %s : %ld\n",
|
|
__func__, name, PTR_ERR(pll_clk));
|
|
goto err_pll;
|
|
}
|
|
|
|
return mux_clk;
|
|
|
|
err_pll:
|
|
clk_unregister(mux_clk);
|
|
mux_clk = pll_clk;
|
|
err_mux:
|
|
kfree(pll);
|
|
return mux_clk;
|
|
}
|