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clk-stm32h7.c
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/*
* Copyright (C) Gabriel Fernandez 2017
* Author: Gabriel Fernandez <[email protected]>
*
* License terms: GPL V2.0.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/regmap.h>
#include <dt-bindings/clock/stm32h7-clks.h>
/* Reset Clock Control Registers */
#define RCC_CR 0x00
#define RCC_CFGR 0x10
#define RCC_D1CFGR 0x18
#define RCC_D2CFGR 0x1C
#define RCC_D3CFGR 0x20
#define RCC_PLLCKSELR 0x28
#define RCC_PLLCFGR 0x2C
#define RCC_PLL1DIVR 0x30
#define RCC_PLL1FRACR 0x34
#define RCC_PLL2DIVR 0x38
#define RCC_PLL2FRACR 0x3C
#define RCC_PLL3DIVR 0x40
#define RCC_PLL3FRACR 0x44
#define RCC_D1CCIPR 0x4C
#define RCC_D2CCIP1R 0x50
#define RCC_D2CCIP2R 0x54
#define RCC_D3CCIPR 0x58
#define RCC_BDCR 0x70
#define RCC_CSR 0x74
#define RCC_AHB3ENR 0xD4
#define RCC_AHB1ENR 0xD8
#define RCC_AHB2ENR 0xDC
#define RCC_AHB4ENR 0xE0
#define RCC_APB3ENR 0xE4
#define RCC_APB1LENR 0xE8
#define RCC_APB1HENR 0xEC
#define RCC_APB2ENR 0xF0
#define RCC_APB4ENR 0xF4
static DEFINE_SPINLOCK(stm32rcc_lock);
static void __iomem *base;
static struct clk_hw **hws;
/* System clock parent */
static const char * const sys_src[] = {
"hsi_ck", "csi_ck", "hse_ck", "pll1_p" };
static const char * const tracein_src[] = {
"hsi_ck", "csi_ck", "hse_ck", "pll1_r" };
static const char * const per_src[] = {
"hsi_ker", "csi_ker", "hse_ck", "disabled" };
static const char * const pll_src[] = {
"hsi_ck", "csi_ck", "hse_ck", "no clock" };
static const char * const sdmmc_src[] = { "pll1_q", "pll2_r" };
static const char * const dsi_src[] = { "ck_dsi_phy", "pll2_q" };
static const char * const qspi_src[] = {
"hclk", "pll1_q", "pll2_r", "per_ck" };
static const char * const fmc_src[] = {
"hclk", "pll1_q", "pll2_r", "per_ck" };
/* Kernel clock parent */
static const char * const swp_src[] = { "pclk1", "hsi_ker" };
static const char * const fdcan_src[] = { "hse_ck", "pll1_q", "pll2_q" };
static const char * const dfsdm1_src[] = { "pclk2", "sys_ck" };
static const char * const spdifrx_src[] = {
"pll1_q", "pll2_r", "pll3_r", "hsi_ker" };
static const char *spi_src1[5] = {
"pll1_q", "pll2_p", "pll3_p", NULL, "per_ck" };
static const char * const spi_src2[] = {
"pclk2", "pll2_q", "pll3_q", "hsi_ker", "csi_ker", "hse_ck" };
static const char * const spi_src3[] = {
"pclk4", "pll2_q", "pll3_q", "hsi_ker", "csi_ker", "hse_ck" };
static const char * const lptim_src1[] = {
"pclk1", "pll2_p", "pll3_r", "lse_ck", "lsi_ck", "per_ck" };
static const char * const lptim_src2[] = {
"pclk4", "pll2_p", "pll3_r", "lse_ck", "lsi_ck", "per_ck" };
static const char * const cec_src[] = {"lse_ck", "lsi_ck", "csi_ker_div122" };
static const char * const usbotg_src[] = {"pll1_q", "pll3_q", "rc48_ck" };
/* i2c 1,2,3 src */
static const char * const i2c_src1[] = {
"pclk1", "pll3_r", "hsi_ker", "csi_ker" };
static const char * const i2c_src2[] = {
"pclk4", "pll3_r", "hsi_ker", "csi_ker" };
static const char * const rng_src[] = {
"rc48_ck", "pll1_q", "lse_ck", "lsi_ck" };
/* usart 1,6 src */
static const char * const usart_src1[] = {
"pclk2", "pll2_q", "pll3_q", "hsi_ker", "csi_ker", "lse_ck" };
/* usart 2,3,4,5,7,8 src */
static const char * const usart_src2[] = {
"pclk1", "pll2_q", "pll3_q", "hsi_ker", "csi_ker", "lse_ck" };
static const char *sai_src[5] = {
"pll1_q", "pll2_p", "pll3_p", NULL, "per_ck" };
static const char * const adc_src[] = { "pll2_p", "pll3_r", "per_ck" };
/* lptim 2,3,4,5 src */
static const char * const lpuart1_src[] = {
"pclk3", "pll2_q", "pll3_q", "csi_ker", "lse_ck" };
static const char * const hrtim_src[] = { "tim2_ker", "d1cpre" };
/* RTC clock parent */
static const char * const rtc_src[] = { "off", "lse_ck", "lsi_ck", "hse_1M" };
/* Micro-controller output clock parent */
static const char * const mco_src1[] = {
"hsi_ck", "lse_ck", "hse_ck", "pll1_q", "rc48_ck" };
static const char * const mco_src2[] = {
"sys_ck", "pll2_p", "hse_ck", "pll1_p", "csi_ck", "lsi_ck" };
/* LCD clock */
static const char * const ltdc_src[] = {"pll3_r"};
/* Gate clock with ready bit and backup domain management */
struct stm32_ready_gate {
struct clk_gate gate;
u8 bit_rdy;
};
#define to_ready_gate_clk(_rgate) container_of(_rgate, struct stm32_ready_gate,\
gate)
#define RGATE_TIMEOUT 10000
static int ready_gate_clk_enable(struct clk_hw *hw)
{
struct clk_gate *gate = to_clk_gate(hw);
struct stm32_ready_gate *rgate = to_ready_gate_clk(gate);
int bit_status;
unsigned int timeout = RGATE_TIMEOUT;
if (clk_gate_ops.is_enabled(hw))
return 0;
clk_gate_ops.enable(hw);
/* We can't use readl_poll_timeout() because we can blocked if
* someone enables this clock before clocksource changes.
* Only jiffies counter is available. Jiffies are incremented by
* interruptions and enable op does not allow to be interrupted.
*/
do {
bit_status = !(readl(gate->reg) & BIT(rgate->bit_rdy));
if (bit_status)
udelay(100);
} while (bit_status && --timeout);
return bit_status;
}
static void ready_gate_clk_disable(struct clk_hw *hw)
{
struct clk_gate *gate = to_clk_gate(hw);
struct stm32_ready_gate *rgate = to_ready_gate_clk(gate);
int bit_status;
unsigned int timeout = RGATE_TIMEOUT;
if (!clk_gate_ops.is_enabled(hw))
return;
clk_gate_ops.disable(hw);
do {
bit_status = !!(readl(gate->reg) & BIT(rgate->bit_rdy));
if (bit_status)
udelay(100);
} while (bit_status && --timeout);
}
static const struct clk_ops ready_gate_clk_ops = {
.enable = ready_gate_clk_enable,
.disable = ready_gate_clk_disable,
.is_enabled = clk_gate_is_enabled,
};
static struct clk_hw *clk_register_ready_gate(struct device *dev,
const char *name, const char *parent_name,
void __iomem *reg, u8 bit_idx, u8 bit_rdy,
unsigned long flags, spinlock_t *lock)
{
struct stm32_ready_gate *rgate;
struct clk_init_data init = { NULL };
struct clk_hw *hw;
int ret;
rgate = kzalloc(sizeof(*rgate), GFP_KERNEL);
if (!rgate)
return ERR_PTR(-ENOMEM);
init.name = name;
init.ops = &ready_gate_clk_ops;
init.flags = flags;
init.parent_names = &parent_name;
init.num_parents = 1;
rgate->bit_rdy = bit_rdy;
rgate->gate.lock = lock;
rgate->gate.reg = reg;
rgate->gate.bit_idx = bit_idx;
rgate->gate.hw.init = &init;
hw = &rgate->gate.hw;
ret = clk_hw_register(dev, hw);
if (ret) {
kfree(rgate);
hw = ERR_PTR(ret);
}
return hw;
}
struct gate_cfg {
u32 offset;
u8 bit_idx;
};
struct muxdiv_cfg {
u32 offset;
u8 shift;
u8 width;
};
struct composite_clk_cfg {
struct gate_cfg *gate;
struct muxdiv_cfg *mux;
struct muxdiv_cfg *div;
const char *name;
const char * const *parent_name;
int num_parents;
u32 flags;
};
struct composite_clk_gcfg_t {
u8 flags;
const struct clk_ops *ops;
};
/*
* General config definition of a composite clock (only clock diviser for rate)
*/
struct composite_clk_gcfg {
struct composite_clk_gcfg_t *mux;
struct composite_clk_gcfg_t *div;
struct composite_clk_gcfg_t *gate;
};
#define M_CFG_MUX(_mux_ops, _mux_flags)\
.mux = &(struct composite_clk_gcfg_t) { _mux_flags, _mux_ops}
#define M_CFG_DIV(_rate_ops, _rate_flags)\
.div = &(struct composite_clk_gcfg_t) {_rate_flags, _rate_ops}
#define M_CFG_GATE(_gate_ops, _gate_flags)\
.gate = &(struct composite_clk_gcfg_t) { _gate_flags, _gate_ops}
static struct clk_mux *_get_cmux(void __iomem *reg, u8 shift, u8 width,
u32 flags, spinlock_t *lock)
{
struct clk_mux *mux;
mux = kzalloc(sizeof(*mux), GFP_KERNEL);
if (!mux)
return ERR_PTR(-ENOMEM);
mux->reg = reg;
mux->shift = shift;
mux->mask = (1 << width) - 1;
mux->flags = flags;
mux->lock = lock;
return mux;
}
static struct clk_divider *_get_cdiv(void __iomem *reg, u8 shift, u8 width,
u32 flags, spinlock_t *lock)
{
struct clk_divider *div;
div = kzalloc(sizeof(*div), GFP_KERNEL);
if (!div)
return ERR_PTR(-ENOMEM);
div->reg = reg;
div->shift = shift;
div->width = width;
div->flags = flags;
div->lock = lock;
return div;
}
static struct clk_gate *_get_cgate(void __iomem *reg, u8 bit_idx, u32 flags,
spinlock_t *lock)
{
struct clk_gate *gate;
gate = kzalloc(sizeof(*gate), GFP_KERNEL);
if (!gate)
return ERR_PTR(-ENOMEM);
gate->reg = reg;
gate->bit_idx = bit_idx;
gate->flags = flags;
gate->lock = lock;
return gate;
}
struct composite_cfg {
struct clk_hw *mux_hw;
struct clk_hw *div_hw;
struct clk_hw *gate_hw;
const struct clk_ops *mux_ops;
const struct clk_ops *div_ops;
const struct clk_ops *gate_ops;
};
static void get_cfg_composite_div(const struct composite_clk_gcfg *gcfg,
const struct composite_clk_cfg *cfg,
struct composite_cfg *composite, spinlock_t *lock)
{
struct clk_mux *mux = NULL;
struct clk_divider *div = NULL;
struct clk_gate *gate = NULL;
const struct clk_ops *mux_ops, *div_ops, *gate_ops;
struct clk_hw *mux_hw;
struct clk_hw *div_hw;
struct clk_hw *gate_hw;
mux_ops = div_ops = gate_ops = NULL;
mux_hw = div_hw = gate_hw = NULL;
if (gcfg->mux && cfg->mux) {
mux = _get_cmux(base + cfg->mux->offset,
cfg->mux->shift,
cfg->mux->width,
gcfg->mux->flags, lock);
if (!IS_ERR(mux)) {
mux_hw = &mux->hw;
mux_ops = gcfg->mux->ops ?
gcfg->mux->ops : &clk_mux_ops;
}
}
if (gcfg->div && cfg->div) {
div = _get_cdiv(base + cfg->div->offset,
cfg->div->shift,
cfg->div->width,
gcfg->div->flags, lock);
if (!IS_ERR(div)) {
div_hw = &div->hw;
div_ops = gcfg->div->ops ?
gcfg->div->ops : &clk_divider_ops;
}
}
if (gcfg->gate && cfg->gate) {
gate = _get_cgate(base + cfg->gate->offset,
cfg->gate->bit_idx,
gcfg->gate->flags, lock);
if (!IS_ERR(gate)) {
gate_hw = &gate->hw;
gate_ops = gcfg->gate->ops ?
gcfg->gate->ops : &clk_gate_ops;
}
}
composite->mux_hw = mux_hw;
composite->mux_ops = mux_ops;
composite->div_hw = div_hw;
composite->div_ops = div_ops;
composite->gate_hw = gate_hw;
composite->gate_ops = gate_ops;
}
/* Kernel Timer */
struct timer_ker {
u8 dppre_shift;
struct clk_hw hw;
spinlock_t *lock;
};
#define to_timer_ker(_hw) container_of(_hw, struct timer_ker, hw)
static unsigned long timer_ker_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct timer_ker *clk_elem = to_timer_ker(hw);
u32 timpre;
u32 dppre_shift = clk_elem->dppre_shift;
u32 prescaler;
u32 mul;
timpre = (readl(base + RCC_CFGR) >> 15) & 0x01;
prescaler = (readl(base + RCC_D2CFGR) >> dppre_shift) & 0x03;
mul = 2;
if (prescaler < 4)
mul = 1;
else if (timpre && prescaler > 4)
mul = 4;
return parent_rate * mul;
}
static const struct clk_ops timer_ker_ops = {
.recalc_rate = timer_ker_recalc_rate,
};
static struct clk_hw *clk_register_stm32_timer_ker(struct device *dev,
const char *name, const char *parent_name,
unsigned long flags,
u8 dppre_shift,
spinlock_t *lock)
{
struct timer_ker *element;
struct clk_init_data init;
struct clk_hw *hw;
int err;
element = kzalloc(sizeof(*element), GFP_KERNEL);
if (!element)
return ERR_PTR(-ENOMEM);
init.name = name;
init.ops = &timer_ker_ops;
init.flags = flags;
init.parent_names = &parent_name;
init.num_parents = 1;
element->hw.init = &init;
element->lock = lock;
element->dppre_shift = dppre_shift;
hw = &element->hw;
err = clk_hw_register(dev, hw);
if (err) {
kfree(element);
return ERR_PTR(err);
}
return hw;
}
static const struct clk_div_table d1cpre_div_table[] = {
{ 0, 1 }, { 1, 1 }, { 2, 1 }, { 3, 1},
{ 4, 1 }, { 5, 1 }, { 6, 1 }, { 7, 1},
{ 8, 2 }, { 9, 4 }, { 10, 8 }, { 11, 16 },
{ 12, 64 }, { 13, 128 }, { 14, 256 },
{ 15, 512 },
{ 0 },
};
static const struct clk_div_table ppre_div_table[] = {
{ 0, 1 }, { 1, 1 }, { 2, 1 }, { 3, 1},
{ 4, 2 }, { 5, 4 }, { 6, 8 }, { 7, 16 },
{ 0 },
};
static void register_core_and_bus_clocks(void)
{
/* CORE AND BUS */
hws[SYS_D1CPRE] = clk_hw_register_divider_table(NULL, "d1cpre",
"sys_ck", CLK_IGNORE_UNUSED, base + RCC_D1CFGR, 8, 4, 0,
d1cpre_div_table, &stm32rcc_lock);
hws[HCLK] = clk_hw_register_divider_table(NULL, "hclk", "d1cpre",
CLK_IGNORE_UNUSED, base + RCC_D1CFGR, 0, 4, 0,
d1cpre_div_table, &stm32rcc_lock);
/* D1 DOMAIN */
/* * CPU Systick */
hws[CPU_SYSTICK] = clk_hw_register_fixed_factor(NULL, "systick",
"d1cpre", 0, 1, 8);
/* * APB3 peripheral */
hws[PCLK3] = clk_hw_register_divider_table(NULL, "pclk3", "hclk", 0,
base + RCC_D1CFGR, 4, 3, 0,
ppre_div_table, &stm32rcc_lock);
/* D2 DOMAIN */
/* * APB1 peripheral */
hws[PCLK1] = clk_hw_register_divider_table(NULL, "pclk1", "hclk", 0,
base + RCC_D2CFGR, 4, 3, 0,
ppre_div_table, &stm32rcc_lock);
/* Timers prescaler clocks */
clk_register_stm32_timer_ker(NULL, "tim1_ker", "pclk1", 0,
4, &stm32rcc_lock);
/* * APB2 peripheral */
hws[PCLK2] = clk_hw_register_divider_table(NULL, "pclk2", "hclk", 0,
base + RCC_D2CFGR, 8, 3, 0, ppre_div_table,
&stm32rcc_lock);
clk_register_stm32_timer_ker(NULL, "tim2_ker", "pclk2", 0, 8,
&stm32rcc_lock);
/* D3 DOMAIN */
/* * APB4 peripheral */
hws[PCLK4] = clk_hw_register_divider_table(NULL, "pclk4", "hclk", 0,
base + RCC_D3CFGR, 4, 3, 0,
ppre_div_table, &stm32rcc_lock);
}
/* MUX clock configuration */
struct stm32_mux_clk {
const char *name;
const char * const *parents;
u8 num_parents;
u32 offset;
u8 shift;
u8 width;
u32 flags;
};
#define M_MCLOCF(_name, _parents, _mux_offset, _mux_shift, _mux_width, _flags)\
{\
.name = _name,\
.parents = _parents,\
.num_parents = ARRAY_SIZE(_parents),\
.offset = _mux_offset,\
.shift = _mux_shift,\
.width = _mux_width,\
.flags = _flags,\
}
#define M_MCLOC(_name, _parents, _mux_offset, _mux_shift, _mux_width)\
M_MCLOCF(_name, _parents, _mux_offset, _mux_shift, _mux_width, 0)\
static const struct stm32_mux_clk stm32_mclk[] __initconst = {
M_MCLOC("per_ck", per_src, RCC_D1CCIPR, 28, 3),
M_MCLOC("pllsrc", pll_src, RCC_PLLCKSELR, 0, 3),
M_MCLOC("sys_ck", sys_src, RCC_CFGR, 0, 3),
M_MCLOC("tracein_ck", tracein_src, RCC_CFGR, 0, 3),
};
/* Oscillary clock configuration */
struct stm32_osc_clk {
const char *name;
const char *parent;
u32 gate_offset;
u8 bit_idx;
u8 bit_rdy;
u32 flags;
};
#define OSC_CLKF(_name, _parent, _gate_offset, _bit_idx, _bit_rdy, _flags)\
{\
.name = _name,\
.parent = _parent,\
.gate_offset = _gate_offset,\
.bit_idx = _bit_idx,\
.bit_rdy = _bit_rdy,\
.flags = _flags,\
}
#define OSC_CLK(_name, _parent, _gate_offset, _bit_idx, _bit_rdy)\
OSC_CLKF(_name, _parent, _gate_offset, _bit_idx, _bit_rdy, 0)
static const struct stm32_osc_clk stm32_oclk[] __initconst = {
OSC_CLKF("hsi_ck", "hsidiv", RCC_CR, 0, 2, CLK_IGNORE_UNUSED),
OSC_CLKF("hsi_ker", "hsidiv", RCC_CR, 1, 2, CLK_IGNORE_UNUSED),
OSC_CLKF("csi_ck", "clk-csi", RCC_CR, 7, 8, CLK_IGNORE_UNUSED),
OSC_CLKF("csi_ker", "clk-csi", RCC_CR, 9, 8, CLK_IGNORE_UNUSED),
OSC_CLKF("rc48_ck", "clk-rc48", RCC_CR, 12, 13, CLK_IGNORE_UNUSED),
OSC_CLKF("lsi_ck", "clk-lsi", RCC_CSR, 0, 1, CLK_IGNORE_UNUSED),
};
/* PLL configuration */
struct st32h7_pll_cfg {
u8 bit_idx;
u32 offset_divr;
u8 bit_frac_en;
u32 offset_frac;
u8 divm;
};
struct stm32_pll_data {
const char *name;
const char *parent_name;
unsigned long flags;
const struct st32h7_pll_cfg *cfg;
};
static const struct st32h7_pll_cfg stm32h7_pll1 = {
.bit_idx = 24,
.offset_divr = RCC_PLL1DIVR,
.bit_frac_en = 0,
.offset_frac = RCC_PLL1FRACR,
.divm = 4,
};
static const struct st32h7_pll_cfg stm32h7_pll2 = {
.bit_idx = 26,
.offset_divr = RCC_PLL2DIVR,
.bit_frac_en = 4,
.offset_frac = RCC_PLL2FRACR,
.divm = 12,
};
static const struct st32h7_pll_cfg stm32h7_pll3 = {
.bit_idx = 28,
.offset_divr = RCC_PLL3DIVR,
.bit_frac_en = 8,
.offset_frac = RCC_PLL3FRACR,
.divm = 20,
};
static const struct stm32_pll_data stm32_pll[] = {
{ "vco1", "pllsrc", CLK_IGNORE_UNUSED, &stm32h7_pll1 },
{ "vco2", "pllsrc", 0, &stm32h7_pll2 },
{ "vco3", "pllsrc", 0, &stm32h7_pll3 },
};
struct stm32_fractional_divider {
void __iomem *mreg;
u8 mshift;
u8 mwidth;
u32 mmask;
void __iomem *nreg;
u8 nshift;
u8 nwidth;
void __iomem *freg_status;
u8 freg_bit;
void __iomem *freg_value;
u8 fshift;
u8 fwidth;
u8 flags;
struct clk_hw hw;
spinlock_t *lock;
};
struct stm32_pll_obj {
spinlock_t *lock;
struct stm32_fractional_divider div;
struct stm32_ready_gate rgate;
struct clk_hw hw;
};
#define to_pll(_hw) container_of(_hw, struct stm32_pll_obj, hw)
static int pll_is_enabled(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
struct clk_hw *_hw = &clk_elem->rgate.gate.hw;
__clk_hw_set_clk(_hw, hw);
return ready_gate_clk_ops.is_enabled(_hw);
}
static int pll_enable(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
struct clk_hw *_hw = &clk_elem->rgate.gate.hw;
__clk_hw_set_clk(_hw, hw);
return ready_gate_clk_ops.enable(_hw);
}
static void pll_disable(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
struct clk_hw *_hw = &clk_elem->rgate.gate.hw;
__clk_hw_set_clk(_hw, hw);
ready_gate_clk_ops.disable(_hw);
}
static int pll_frac_is_enabled(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
struct stm32_fractional_divider *fd = &clk_elem->div;
return (readl(fd->freg_status) >> fd->freg_bit) & 0x01;
}
static unsigned long pll_read_frac(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
struct stm32_fractional_divider *fd = &clk_elem->div;
return (readl(fd->freg_value) >> fd->fshift) &
GENMASK(fd->fwidth - 1, 0);
}
static unsigned long pll_fd_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
struct stm32_fractional_divider *fd = &clk_elem->div;
unsigned long m, n;
u32 val, mask;
u64 rate, rate1 = 0;
val = readl(fd->mreg);
mask = GENMASK(fd->mwidth - 1, 0) << fd->mshift;
m = (val & mask) >> fd->mshift;
val = readl(fd->nreg);
mask = GENMASK(fd->nwidth - 1, 0) << fd->nshift;
n = ((val & mask) >> fd->nshift) + 1;
if (!n || !m)
return parent_rate;
rate = (u64)parent_rate * n;
do_div(rate, m);
if (pll_frac_is_enabled(hw)) {
val = pll_read_frac(hw);
rate1 = (u64)parent_rate * (u64)val;
do_div(rate1, (m * 8191));
}
return rate + rate1;
}
static const struct clk_ops pll_ops = {
.enable = pll_enable,
.disable = pll_disable,
.is_enabled = pll_is_enabled,
.recalc_rate = pll_fd_recalc_rate,
};
static struct clk_hw *clk_register_stm32_pll(struct device *dev,
const char *name,
const char *parent,
unsigned long flags,
const struct st32h7_pll_cfg *cfg,
spinlock_t *lock)
{
struct stm32_pll_obj *pll;
struct clk_init_data init = { NULL };
struct clk_hw *hw;
int ret;
struct stm32_fractional_divider *div = NULL;
struct stm32_ready_gate *rgate;
pll = kzalloc(sizeof(*pll), GFP_KERNEL);
if (!pll)
return ERR_PTR(-ENOMEM);
init.name = name;
init.ops = &pll_ops;
init.flags = flags;
init.parent_names = &parent;
init.num_parents = 1;
pll->hw.init = &init;
hw = &pll->hw;
rgate = &pll->rgate;
rgate->bit_rdy = cfg->bit_idx + 1;
rgate->gate.lock = lock;
rgate->gate.reg = base + RCC_CR;
rgate->gate.bit_idx = cfg->bit_idx;
div = &pll->div;
div->flags = 0;
div->mreg = base + RCC_PLLCKSELR;
div->mshift = cfg->divm;
div->mwidth = 6;
div->nreg = base + cfg->offset_divr;
div->nshift = 0;
div->nwidth = 9;
div->freg_status = base + RCC_PLLCFGR;
div->freg_bit = cfg->bit_frac_en;
div->freg_value = base + cfg->offset_frac;
div->fshift = 3;
div->fwidth = 13;
div->lock = lock;
ret = clk_hw_register(dev, hw);
if (ret) {
kfree(pll);
hw = ERR_PTR(ret);
}
return hw;
}
/* ODF CLOCKS */
static unsigned long odf_divider_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
return clk_divider_ops.recalc_rate(hw, parent_rate);
}
static long odf_divider_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *prate)
{
return clk_divider_ops.round_rate(hw, rate, prate);
}
static int odf_divider_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct clk_hw *hwp;
int pll_status;
int ret;
hwp = clk_hw_get_parent(hw);
pll_status = pll_is_enabled(hwp);
if (pll_status)
pll_disable(hwp);
ret = clk_divider_ops.set_rate(hw, rate, parent_rate);
if (pll_status)
pll_enable(hwp);
return ret;
}
static const struct clk_ops odf_divider_ops = {
.recalc_rate = odf_divider_recalc_rate,
.round_rate = odf_divider_round_rate,
.set_rate = odf_divider_set_rate,
};
static int odf_gate_enable(struct clk_hw *hw)
{
struct clk_hw *hwp;
int pll_status;
int ret;
if (clk_gate_ops.is_enabled(hw))
return 0;
hwp = clk_hw_get_parent(hw);
pll_status = pll_is_enabled(hwp);
if (pll_status)
pll_disable(hwp);
ret = clk_gate_ops.enable(hw);
if (pll_status)
pll_enable(hwp);
return ret;
}
static void odf_gate_disable(struct clk_hw *hw)
{
struct clk_hw *hwp;
int pll_status;
if (!clk_gate_ops.is_enabled(hw))
return;
hwp = clk_hw_get_parent(hw);
pll_status = pll_is_enabled(hwp);
if (pll_status)
pll_disable(hwp);
clk_gate_ops.disable(hw);
if (pll_status)
pll_enable(hwp);
}
static const struct clk_ops odf_gate_ops = {
.enable = odf_gate_enable,
.disable = odf_gate_disable,
.is_enabled = clk_gate_is_enabled,
};
static struct composite_clk_gcfg odf_clk_gcfg = {
M_CFG_DIV(&odf_divider_ops, 0),
M_CFG_GATE(&odf_gate_ops, 0),
};
#define M_ODF_F(_name, _parent, _gate_offset, _bit_idx, _rate_offset,\
_rate_shift, _rate_width, _flags)\
{\
.mux = NULL,\
.div = &(struct muxdiv_cfg) {_rate_offset, _rate_shift, _rate_width},\
.gate = &(struct gate_cfg) {_gate_offset, _bit_idx },\
.name = _name,\
.parent_name = &(const char *) {_parent},\
.num_parents = 1,\
.flags = _flags,\
}
#define M_ODF(_name, _parent, _gate_offset, _bit_idx, _rate_offset,\
_rate_shift, _rate_width)\
M_ODF_F(_name, _parent, _gate_offset, _bit_idx, _rate_offset,\
_rate_shift, _rate_width, 0)\
static const struct composite_clk_cfg stm32_odf[3][3] = {
{
M_ODF_F("pll1_p", "vco1", RCC_PLLCFGR, 16, RCC_PLL1DIVR, 9, 7,
CLK_IGNORE_UNUSED),
M_ODF_F("pll1_q", "vco1", RCC_PLLCFGR, 17, RCC_PLL1DIVR, 16, 7,
CLK_IGNORE_UNUSED),
M_ODF_F("pll1_r", "vco1", RCC_PLLCFGR, 18, RCC_PLL1DIVR, 24, 7,
CLK_IGNORE_UNUSED),
},
{
M_ODF("pll2_p", "vco2", RCC_PLLCFGR, 19, RCC_PLL2DIVR, 9, 7),
M_ODF("pll2_q", "vco2", RCC_PLLCFGR, 20, RCC_PLL2DIVR, 16, 7),
M_ODF("pll2_r", "vco2", RCC_PLLCFGR, 21, RCC_PLL2DIVR, 24, 7),
},
{
M_ODF("pll3_p", "vco3", RCC_PLLCFGR, 22, RCC_PLL3DIVR, 9, 7),
M_ODF("pll3_q", "vco3", RCC_PLLCFGR, 23, RCC_PLL3DIVR, 16, 7),
M_ODF("pll3_r", "vco3", RCC_PLLCFGR, 24, RCC_PLL3DIVR, 24, 7),
}
};
/* PERIF CLOCKS */
struct pclk_t {
u32 gate_offset;
u8 bit_idx;
const char *name;
const char *parent;
u32 flags;
};
#define PER_CLKF(_gate_offset, _bit_idx, _name, _parent, _flags)\
{\