[PATCH v2 3/4] clk: mediatek: Add new clock driver to handle FHCTL hardware
Johnson Wang (王聖鑫)
Johnson.Wang at mediatek.com
Tue Sep 27 23:18:12 PDT 2022
On Tue, 2022-09-27 at 18:56 +0800, Edward-JW Yang wrote:
> On Wed, 2022-09-14 at 20:45 +0800, Johnson Wang wrote:
> > To implement frequency hopping and spread spectrum clocking
> > function, we introduce new clock type and APIs to handle
> > FHCTL hardware.
> >
> > Co-developed-by: Edward-JW Yang <edward-jw.yang at mediatek.com>
> > Signed-off-by: Edward-JW Yang <edward-jw.yang at mediatek.com>
> > Signed-off-by: Johnson Wang <johnson.wang at mediatek.com>
> > ---
> > drivers/clk/mediatek/Makefile | 2 +-
> > drivers/clk/mediatek/clk-fhctl.c | 244
> > ++++++++++++++++++++++++++++
> > drivers/clk/mediatek/clk-fhctl.h | 26 +++
> > drivers/clk/mediatek/clk-pllfh.c | 268
> > +++++++++++++++++++++++++++++++
> > drivers/clk/mediatek/clk-pllfh.h | 82 ++++++++++
> > 5 files changed, 621 insertions(+), 1 deletion(-)
> > create mode 100644 drivers/clk/mediatek/clk-fhctl.c
> > create mode 100644 drivers/clk/mediatek/clk-fhctl.h
> > create mode 100644 drivers/clk/mediatek/clk-pllfh.c
> > create mode 100644 drivers/clk/mediatek/clk-pllfh.h
> >
> > diff --git a/drivers/clk/mediatek/Makefile
> > b/drivers/clk/mediatek/Makefile
> > index caf2ce93d666..0e674a55e51e 100644
> > --- a/drivers/clk/mediatek/Makefile
> > +++ b/drivers/clk/mediatek/Makefile
> > @@ -1,5 +1,5 @@
> > # SPDX-License-Identifier: GPL-2.0
> > -obj-$(CONFIG_COMMON_CLK_MEDIATEK) += clk-mtk.o clk-pll.o clk-
> > gate.o clk-apmixed.o clk-cpumux.o reset.o clk-mux.o
> > +obj-$(CONFIG_COMMON_CLK_MEDIATEK) += clk-mtk.o clk-pll.o clk-
> > gate.o clk-apmixed.o clk-cpumux.o reset.o clk-mux.o clk-fhctl.o
> > clk-pllfh.o
>
> We need to add a config for clk-fhctl.o and clk-pllfh.o. It's only
> used by specfic
> project.
Hi Edward,
Thanks for your suggestion.
Then I will add one config symbol and make MT8186 to select it.
BRs,
Johnson Wang
>
> >
> > obj-$(CONFIG_COMMON_CLK_MT6765) += clk-mt6765.o
> > obj-$(CONFIG_COMMON_CLK_MT6765_AUDIOSYS) += clk-mt6765-audio.o
> > diff --git a/drivers/clk/mediatek/clk-fhctl.c
> > b/drivers/clk/mediatek/clk-fhctl.c
> > new file mode 100644
> > index 000000000000..4f271acef5fe
> > --- /dev/null
> > +++ b/drivers/clk/mediatek/clk-fhctl.c
> > @@ -0,0 +1,244 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Copyright (c) 2022 MediaTek Inc.
> > + * Author: Edward-JW Yang <edward-jw.yang at mediatek.com>
> > + */
> > +
> > +#include <linux/io.h>
> > +#include <linux/iopoll.h>
> > +
> > +#include "clk-mtk.h"
> > +#include "clk-pllfh.h"
> > +#include "clk-fhctl.h"
> > +
> > +#define PERCENT_TO_DDSLMT(dds, percent_m10) \
> > + ((((dds) * (percent_m10)) >> 5) / 100)
> > +
> > +static const struct fhctl_offset fhctl_offset = {
> > + .offset_hp_en = 0x0,
> > + .offset_clk_con = 0x8,
> > + .offset_rst_con = 0xc,
> > + .offset_slope0 = 0x10,
> > + .offset_slope1 = 0x14,
> > + .offset_cfg = 0x0,
> > + .offset_updnlmt = 0x4,
> > + .offset_dds = 0x8,
> > + .offset_dvfs = 0xc,
> > + .offset_mon = 0x10,
> > +};
> > +
> > +const struct fhctl_offset *fhctl_get_offset_table(void)
> > +{
> > + return &fhctl_offset;
> > +}
> > +
> > +static void dump_hw(struct mtk_clk_pll *pll, struct fh_pll_regs
> > *regs,
> > + const struct fh_pll_data *data)
> > +{
> > + pr_info("hp_en<%x>,clk_con<%x>,slope0<%x>,slope1<%x>\n",
> > + readl(regs->reg_hp_en), readl(regs->reg_clk_con),
> > + readl(regs->reg_slope0), readl(regs->reg_slope1));
> > + pr_info("cfg<%x>,lmt<%x>,dds<%x>,dvfs<%x>,mon<%x>\n",
> > + readl(regs->reg_cfg), readl(regs->reg_updnlmt),
> > + readl(regs->reg_dds), readl(regs->reg_dvfs),
> > + readl(regs->reg_mon));
> > + pr_info("pcw<%x>\n", readl(pll->pcw_addr));
> > +}
> > +
> > +static int fhctl_set_ssc_regs(struct mtk_clk_pll *pll, struct
> > fh_pll_regs *regs,
> > + const struct fh_pll_data *data, u32 rate)
> > +{
> > + u32 updnlmt_val, r;
> > +
> > + writel((readl(regs->reg_cfg) & ~(data->frddsx_en)), regs-
> > >reg_cfg);
> > + writel((readl(regs->reg_cfg) & ~(data->sfstrx_en)), regs-
> > >reg_cfg);
> > + writel((readl(regs->reg_cfg) & ~(data->fhctlx_en)), regs-
> > >reg_cfg);
> > +
> > + if (rate > 0) {
> > + /* Set the relative parameter registers
> > (dt/df/upbnd/downbnd) */
> > + r = readl(regs->reg_cfg);
> > + r &= ~(data->msk_frddsx_dys);
> > + r |= (data->df_val << (ffs(data->msk_frddsx_dys) - 1));
> > + writel(r, regs->reg_cfg);
> > +
> > + r = readl(regs->reg_cfg);
> > + r &= ~(data->msk_frddsx_dts);
> > + r |= (data->dt_val << (ffs(data->msk_frddsx_dts) - 1));
> > + writel(r, regs->reg_cfg);
> > +
> > + writel((readl(pll->pcw_addr) & data->dds_mask) | data-
> > >tgl_org,
> > + regs->reg_dds);
> > +
> > + /* Calculate UPDNLMT */
> > + updnlmt_val = PERCENT_TO_DDSLMT((readl(regs->reg_dds) &
> > + data->dds_mask), rate)
> > <<
> > + data->updnlmt_shft;
> > +
> > + writel(updnlmt_val, regs->reg_updnlmt);
> > + writel(readl(regs->reg_hp_en) | BIT(data->fh_id),
> > + regs->reg_hp_en);
> > + /* Enable SSC */
> > + writel(readl(regs->reg_cfg) | data->frddsx_en, regs-
> > >reg_cfg);
> > + /* Enable Hopping control */
> > + writel(readl(regs->reg_cfg) | data->fhctlx_en, regs-
> > >reg_cfg);
> > +
> > + } else {
> > + /* Switch to APMIXEDSYS control */
> > + writel(readl(regs->reg_hp_en) & ~BIT(data->fh_id),
> > + regs->reg_hp_en);
> > + /* Wait for DDS to be stable */
> > + udelay(30);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int hopping_hw_flow(struct mtk_clk_pll *pll, struct
> > fh_pll_regs *regs,
> > + const struct fh_pll_data *data,
> > + struct fh_pll_state *state, unsigned int
> > new_dds)
> > +{
> > + u32 dds_mask = data->dds_mask;
> > + u32 mon_dds = 0;
> > + u32 con_pcw_tmp;
> > + int ret;
> > +
> > + if (state->ssc_rate)
> > + fhctl_set_ssc_regs(pll, regs, data, 0);
> > +
> > + writel((readl(pll->pcw_addr) & dds_mask) | data->tgl_org,
> > + regs->reg_dds);
> > +
> > + writel(readl(regs->reg_cfg) | data->sfstrx_en, regs->reg_cfg);
> > + writel(readl(regs->reg_cfg) | data->fhctlx_en, regs->reg_cfg);
> > + writel(data->slope0_value, regs->reg_slope0);
> > + writel(data->slope1_value, regs->reg_slope1);
> > +
> > + writel(readl(regs->reg_hp_en) | BIT(data->fh_id), regs-
> > >reg_hp_en);
> > + writel((new_dds) | (data->dvfs_tri), regs->reg_dvfs);
> > +
> > + /* Wait 1000 us until DDS stable */
> > + ret = readl_poll_timeout_atomic(regs->reg_mon, mon_dds,
> > + (mon_dds & dds_mask) == new_dds,
> > + 10, 1000);
> > + if (ret) {
> > + pr_warn("%s: FHCTL hopping timeout\n", pll->data-
> > >name);
> > + dump_hw(pll, regs, data);
> > + }
> > +
> > + con_pcw_tmp = readl(pll->pcw_addr) & (~dds_mask);
> > + con_pcw_tmp = (con_pcw_tmp | (readl(regs->reg_mon) & dds_mask)
> > |
> > + data->pcwchg);
> > +
> > + writel(con_pcw_tmp, pll->pcw_addr);
> > + writel(readl(regs->reg_hp_en) & ~BIT(data->fh_id), regs-
> > >reg_hp_en);
> > +
> > + if (state->ssc_rate)
> > + fhctl_set_ssc_regs(pll, regs, data, state->ssc_rate);
> > +
> > + return ret;
> > +}
> > +
> > +static unsigned int __get_postdiv(struct mtk_clk_pll *pll)
> > +{
> > + unsigned int regval;
> > +
> > + regval = readl(pll->pd_addr) >> pll->data->pd_shift;
> > + regval &= POSTDIV_MASK;
> > +
> > + return BIT(regval);
> > +}
> > +
> > +static void __set_postdiv(struct mtk_clk_pll *pll, unsigned int
> > postdiv)
> > +{
> > + unsigned int regval;
> > +
> > + regval = readl(pll->pd_addr);
> > + regval &= ~(POSTDIV_MASK << pll->data->pd_shift);
> > + regval |= (ffs(postdiv) - 1) << pll->data->pd_shift;
> > + writel(regval, pll->pd_addr);
> > +}
> > +
> > +static int fhctl_hopping(struct mtk_fh *fh, unsigned int new_dds,
> > + unsigned int postdiv)
> > +{
> > + const struct fh_pll_data *data = &fh->pllfh_data->data;
> > + struct fh_pll_state *state = &fh->pllfh_data->state;
> > + struct fh_pll_regs *regs = &fh->regs;
> > + struct mtk_clk_pll *pll = &fh->clk_pll;
> > + spinlock_t *lock = fh->lock;
> > + unsigned int pll_postdiv;
> > + unsigned long flags = 0;
> > + int ret;
> > +
> > + if (postdiv) {
> > + pll_postdiv = __get_postdiv(pll);
> > +
> > + if (postdiv > pll_postdiv)
> > + __set_postdiv(pll, postdiv);
> > + }
> > +
> > + spin_lock_irqsave(lock, flags);
> > +
> > + ret = hopping_hw_flow(pll, regs, data, state, new_dds);
> > +
> > + spin_unlock_irqrestore(lock, flags);
> > +
> > + if (postdiv && postdiv < pll_postdiv)
> > + __set_postdiv(pll, postdiv);
> > +
> > + return ret;
> > +}
> > +
> > +static int fhctl_ssc_enable(struct mtk_fh *fh, u32 rate)
> > +{
> > + const struct fh_pll_data *data = &fh->pllfh_data->data;
> > + struct fh_pll_state *state = &fh->pllfh_data->state;
> > + struct fh_pll_regs *regs = &fh->regs;
> > + struct mtk_clk_pll *pll = &fh->clk_pll;
> > + spinlock_t *lock = fh->lock;
> > + unsigned long flags = 0;
> > +
> > + spin_lock_irqsave(lock, flags);
> > +
> > + fhctl_set_ssc_regs(pll, regs, data, rate);
> > + state->ssc_rate = rate;
> > +
> > + spin_unlock_irqrestore(lock, flags);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct fh_operation fhctl_ops = {
> > + .hopping = fhctl_hopping,
> > + .ssc_enable = fhctl_ssc_enable,
> > +};
> > +
> > +const struct fh_operation *fhctl_get_ops(void)
> > +{
> > + return &fhctl_ops;
> > +}
> > +
> > +void fhctl_hw_init(struct mtk_fh *fh)
> > +{
> > + const struct fh_pll_data data = fh->pllfh_data->data;
> > + struct fh_pll_state state = fh->pllfh_data->state;
> > + struct fh_pll_regs regs = fh->regs;
> > + u32 val;
> > +
> > + /* initial hw register */
> > + val = readl(regs.reg_clk_con) | BIT(data.fh_id);
> > + writel(val, regs.reg_clk_con);
> > +
> > + val = readl(regs.reg_rst_con) & ~BIT(data.fh_id);
> > + writel(val, regs.reg_rst_con);
> > + val = readl(regs.reg_rst_con) | BIT(data.fh_id);
> > + writel(val, regs.reg_rst_con);
> > +
> > + writel(0x0, regs.reg_cfg);
> > + writel(0x0, regs.reg_updnlmt);
> > + writel(0x0, regs.reg_dds);
> > +
> > + /* enable ssc if needed */
> > + if (state.ssc_rate)
> > + fh->ops->ssc_enable(fh, state.ssc_rate);
> > +}
> > diff --git a/drivers/clk/mediatek/clk-fhctl.h
> > b/drivers/clk/mediatek/clk-fhctl.h
> > new file mode 100644
> > index 000000000000..51275febf086
> > --- /dev/null
> > +++ b/drivers/clk/mediatek/clk-fhctl.h
> > @@ -0,0 +1,26 @@
> > +/* SPDX-License-Identifier: GPL-2.0-only */
> > +/*
> > + * Copyright (c) 2022 MediaTek Inc.
> > + * Author: Edward-JW Yang <edward-jw.yang at mediatek.com>
> > + */
> > +
> > +#ifndef __CLK_FHCTL_H
> > +#define __CLK_FHCTL_H
> > +
> > +struct fhctl_offset {
> > + u32 offset_hp_en;
> > + u32 offset_clk_con;
> > + u32 offset_rst_con;
> > + u32 offset_slope0;
> > + u32 offset_slope1;
> > + u32 offset_cfg;
> > + u32 offset_updnlmt;
> > + u32 offset_dds;
> > + u32 offset_dvfs;
> > + u32 offset_mon;
> > +};
> > +const struct fhctl_offset *fhctl_get_offset_table(void);
> > +const struct fh_operation *fhctl_get_ops(void);
> > +void fhctl_hw_init(struct mtk_fh *fh);
> > +
> > +#endif
> > diff --git a/drivers/clk/mediatek/clk-pllfh.c
> > b/drivers/clk/mediatek/clk-pllfh.c
> > new file mode 100644
> > index 000000000000..15e5781fecca
> > --- /dev/null
> > +++ b/drivers/clk/mediatek/clk-pllfh.c
> > @@ -0,0 +1,268 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * Copyright (c) 2022 MediaTek Inc.
> > + * Author: Edward-JW Yang <edward-jw.yang at mediatek.com>
> > + */
> > +
> > +#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"
> > +#include "clk-pllfh.h"
> > +#include "clk-fhctl.h"
> > +
> > +static DEFINE_SPINLOCK(pllfh_lock);
> > +
> > +inline struct mtk_fh *to_mtk_fh(struct clk_hw *hw)
> > +{
> > + struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
> > +
> > + return container_of(pll, struct mtk_fh, clk_pll);
> > +}
> > +
> > +static int mtk_fhctl_set_rate(struct clk_hw *hw, unsigned long
> > rate,
> > + unsigned long parent_rate)
> > +{
> > + struct mtk_clk_pll *pll = to_mtk_clk_pll(hw);
> > + struct mtk_fh *fh = to_mtk_fh(hw);
> > + u32 pcw = 0;
> > + u32 postdiv;
> > +
> > + mtk_pll_calc_values(pll, &pcw, &postdiv, rate, parent_rate);
> > +
> > + return fh->ops->hopping(fh, pcw, postdiv);
> > +}
> > +
> > +static const struct clk_ops mtk_pllfh_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_fhctl_set_rate,
> > +};
> > +
> > +static struct mtk_pllfh_data *get_pllfh_by_id(struct
> > mtk_pllfh_data *pllfhs,
> > + int num_fhs, int pll_id)
> > +{
> > + int i;
> > +
> > + for (i = 0; i < num_fhs; i++)
> > + if (pllfhs[i].data.pll_id == pll_id)
> > + return &pllfhs[i];
> > +
> > + return NULL;
> > +}
> > +
> > +void fhctl_parse_dt(const u8 *compatible_node, struct
> > mtk_pllfh_data *pllfhs,
> > + int num_fhs)
> > +{
> > + void __iomem *base;
> > + struct device_node *node;
> > + u32 num_clocks, pll_id, ssc_rate;
> > + int offset, i;
> > +
> > + node = of_find_compatible_node(NULL, NULL, compatible_node);
> > + if (!node) {
> > + pr_err("cannot find \"%s\"\n", compatible_node);
> > + return;
> > + }
> > +
> > + base = of_iomap(node, 0);
> > + if (!base) {
> > + pr_err("%s(): ioremap failed\n", __func__);
> > + return;
> > + }
> > +
> > + num_clocks = of_clk_get_parent_count(node);
> > + if (!num_clocks) {
> > + pr_err("%s(): failed to get clocks property\n",
> > __func__);
> > + return;
> > + }
> > +
> > + for (i = 0; i < num_clocks; i++) {
> > + struct mtk_pllfh_data *pllfh;
> > +
> > + offset = i * 2;
> > +
> > + of_property_read_u32_index(node, "clocks", offset + 1,
> > &pll_id);
> > + of_property_read_u32_index(node,
> > + "mediatek,hopping-ssc-
> > percents",
> > + i, &ssc_rate);
> > +
> > + pllfh = get_pllfh_by_id(pllfhs, num_fhs, pll_id);
> > + if (!pllfh)
> > + continue;
> > +
> > + pllfh->state.fh_enable = 1;
> > + pllfh->state.ssc_rate = ssc_rate;
> > + pllfh->state.base = base;
> > + }
> > +}
> > +
> > +static void pllfh_init(struct mtk_fh *fh, struct mtk_pllfh_data
> > *pllfh_data)
> > +{
> > + struct fh_pll_regs *regs = &fh->regs;
> > + const struct fhctl_offset *offset;
> > + void __iomem *base = pllfh_data->state.base;
> > + void __iomem *fhx_base = base + pllfh_data->data.fhx_offset;
> > +
> > + offset = fhctl_get_offset_table();
> > +
> > + regs->reg_hp_en = base + offset->offset_hp_en;
> > + regs->reg_clk_con = base + offset->offset_clk_con;
> > + regs->reg_rst_con = base + offset->offset_rst_con;
> > + regs->reg_slope0 = base + offset->offset_slope0;
> > + regs->reg_slope1 = base + offset->offset_slope1;
> > +
> > + regs->reg_cfg = fhx_base + offset->offset_cfg;
> > + regs->reg_updnlmt = fhx_base + offset->offset_updnlmt;
> > + regs->reg_dds = fhx_base + offset->offset_dds;
> > + regs->reg_dvfs = fhx_base + offset->offset_dvfs;
> > + regs->reg_mon = fhx_base + offset->offset_mon;
> > +
> > + fh->pllfh_data = pllfh_data;
> > + fh->lock = &pllfh_lock;
> > +
> > + fh->ops = fhctl_get_ops();
> > +}
> > +
> > +static bool fhctl_is_supported_and_enabled(const struct
> > mtk_pllfh_data *pllfh)
> > +{
> > + return pllfh && (pllfh->state.fh_enable == 1);
> > +}
> > +
> > +static struct clk_hw *
> > +mtk_clk_register_pllfh(const struct mtk_pll_data *pll_data,
> > + struct mtk_pllfh_data *pllfh_data, void __iomem
> > *base)
> > +{
> > + struct clk_hw *hw;
> > + struct mtk_fh *fh;
> > +
> > + fh = kzalloc(sizeof(*fh), GFP_KERNEL);
> > + if (!fh)
> > + return ERR_PTR(-ENOMEM);
> > +
> > + pllfh_init(fh, pllfh_data);
> > +
> > + hw = mtk_clk_register_pll_ops(&fh->clk_pll, pll_data, base,
> > + &mtk_pllfh_ops);
> > +
> > + if (IS_ERR(hw))
> > + kfree(fh);
> > + else
> > + fhctl_hw_init(fh);
> > +
> > + return hw;
> > +}
> > +
> > +static void mtk_clk_unregister_pllfh(struct clk_hw *hw)
> > +{
> > + struct mtk_fh *fh;
> > +
> > + if (!hw)
> > + return;
> > +
> > + fh = to_mtk_fh(hw);
> > +
> > + clk_hw_unregister(hw);
> > + kfree(fh);
> > +}
> > +
> > +int mtk_clk_register_pllfhs(struct device_node *node,
> > + const struct mtk_pll_data *plls, int
> > num_plls,
> > + struct mtk_pllfh_data *pllfhs, int num_fhs,
> > + struct clk_hw_onecell_data *clk_data)
> > +{
> > + void __iomem *base;
> > + int i;
> > + struct clk_hw *hw;
> > +
> > + base = of_iomap(node, 0);
> > + if (!base) {
> > + pr_err("%s(): ioremap failed\n", __func__);
> > + return -EINVAL;
> > + }
> > +
> > + for (i = 0; i < num_plls; i++) {
> > + const struct mtk_pll_data *pll = &plls[i];
> > + struct mtk_pllfh_data *pllfh;
> > +
> > + pllfh = get_pllfh_by_id(pllfhs, num_fhs, pll->id);
> > +
> > + if (fhctl_is_supported_and_enabled(pllfh))
> > + hw = mtk_clk_register_pllfh(pll, pllfh, base);
> > + else
> > + hw = mtk_clk_register_pll(pll, base);
> > +
> > + if (IS_ERR(hw)) {
> > + pr_err("Failed to register clk %s: %pe\n", pll-
> > >name,
> > + hw);
> > + goto err;
> > + }
> > +
> > + clk_data->hws[pll->id] = hw;
> > + }
> > +
> > + return 0;
> > +
> > +err:
> > + while (--i >= 0) {
> > + const struct mtk_pll_data *pll = &plls[i];
> > + struct mtk_pllfh_data *pllfh;
> > +
> > + pllfh = get_pllfh_by_id(pllfhs, num_fhs, pll->id);
> > +
> > + if (fhctl_is_supported_and_enabled(pllfh))
> > + mtk_clk_unregister_pllfh(clk_data->hws[pll-
> > >id]);
> > + else
> > + mtk_clk_unregister_pll(clk_data->hws[pll->id]);
> > +
> > + clk_data->hws[pll->id] = ERR_PTR(-ENOENT);
> > + }
> > +
> > + iounmap(base);
> > +
> > + return PTR_ERR(hw);
> > +}
> > +
> > +void mtk_clk_unregister_pllfhs(const struct mtk_pll_data *plls,
> > int num_plls,
> > + struct mtk_pllfh_data *pllfhs, int
> > num_fhs,
> > + struct clk_hw_onecell_data *clk_data)
> > +{
> > + void __iomem *base = NULL, *fhctl_base = NULL;
> > + int i;
> > +
> > + if (!clk_data)
> > + return;
> > +
> > + for (i = num_plls; i > 0; i--) {
> > + const struct mtk_pll_data *pll = &plls[i - 1];
> > + struct mtk_pllfh_data *pllfh;
> > +
> > + if (IS_ERR_OR_NULL(clk_data->hws[pll->id]))
> > + continue;
> > +
> > + pllfh = get_pllfh_by_id(pllfhs, num_fhs, pll->id);
> > +
> > + if (fhctl_is_supported_and_enabled(pllfh)) {
> > + fhctl_base = pllfh->state.base;
> > + mtk_clk_unregister_pllfh(clk_data->hws[pll-
> > >id]);
> > + } else {
> > + base = mtk_clk_pll_get_base(clk_data->hws[pll-
> > >id],
> > + pll);
> > + mtk_clk_unregister_pll(clk_data->hws[pll->id]);
> > + }
> > +
> > + clk_data->hws[pll->id] = ERR_PTR(-ENOENT);
> > + }
> > +
> > + if (fhctl_base)
> > + iounmap(fhctl_base);
> > +
> > + iounmap(base);
> > +}
> > diff --git a/drivers/clk/mediatek/clk-pllfh.h
> > b/drivers/clk/mediatek/clk-pllfh.h
> > new file mode 100644
> > index 000000000000..effc7976c496
> > --- /dev/null
> > +++ b/drivers/clk/mediatek/clk-pllfh.h
> > @@ -0,0 +1,82 @@
> > +/* SPDX-License-Identifier: GPL-2.0-only */
> > +/*
> > + * Copyright (c) 2022 MediaTek Inc.
> > + * Author: Edward-JW Yang <edward-jw.yang at mediatek.com>
> > + */
> > +
> > +#ifndef __DRV_CLKFH_H
> > +#define __DRV_CLKFH_H
> > +
> > +#include "clk-pll.h"
> > +
> > +struct fh_pll_state {
> > + void __iomem *base;
> > + u32 fh_enable;
> > + u32 ssc_rate;
> > +};
> > +
> > +struct fh_pll_data {
> > + int pll_id;
> > + int fh_id;
> > + u32 fhx_offset;
> > + u32 dds_mask;
> > + u32 slope0_value;
> > + u32 slope1_value;
> > + u32 sfstrx_en;
> > + u32 frddsx_en;
> > + u32 fhctlx_en;
> > + u32 tgl_org;
> > + u32 dvfs_tri;
> > + u32 pcwchg;
> > + u32 dt_val;
> > + u32 df_val;
> > + u32 updnlmt_shft;
> > + u32 msk_frddsx_dys;
> > + u32 msk_frddsx_dts;
> > +};
> > +
> > +struct mtk_pllfh_data {
> > + struct fh_pll_state state;
> > + const struct fh_pll_data data;
> > +};
> > +
> > +struct fh_pll_regs {
> > + void __iomem *reg_hp_en;
> > + void __iomem *reg_clk_con;
> > + void __iomem *reg_rst_con;
> > + void __iomem *reg_slope0;
> > + void __iomem *reg_slope1;
> > + void __iomem *reg_cfg;
> > + void __iomem *reg_updnlmt;
> > + void __iomem *reg_dds;
> > + void __iomem *reg_dvfs;
> > + void __iomem *reg_mon;
> > +};
> > +
> > +struct mtk_fh {
> > + struct mtk_clk_pll clk_pll;
> > + struct fh_pll_regs regs;
> > + struct mtk_pllfh_data *pllfh_data;
> > + const struct fh_operation *ops;
> > + spinlock_t *lock;
> > +};
> > +
> > +struct fh_operation {
> > + int (*hopping)(struct mtk_fh *fh, unsigned int new_dds,
> > + unsigned int postdiv);
> > + int (*ssc_enable)(struct mtk_fh *fh, u32 rate);
> > +};
> > +
> > +int mtk_clk_register_pllfhs(struct device_node *node,
> > + const struct mtk_pll_data *plls, int
> > num_plls,
> > + struct mtk_pllfh_data *pllfhs, int
> > num_pllfhs,
> > + struct clk_hw_onecell_data *clk_data);
> > +
> > +void mtk_clk_unregister_pllfhs(const struct mtk_pll_data *plls,
> > int num_plls,
> > + struct mtk_pllfh_data *pllfhs, int
> > num_fhs,
> > + struct clk_hw_onecell_data *clk_data);
> > +
> > +void fhctl_parse_dt(const u8 *compatible_node, struct
> > mtk_pllfh_data *pllfhs,
> > + int num_pllfhs);
> > +
> > +#endif /* __DRV_CLKFH_H */
> > --
> > 2.18.0
> >
>
>
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