// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) STMicroelectronics 2017
* Author: Gabriel Fernandez <gabriel.fernandez@st.com> for STMicroelectronics.
*/
#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 0 x00
#define RCC_CFGR 0 x10
#define RCC_D1CFGR 0 x18
#define RCC_D2CFGR 0 x1C
#define RCC_D3CFGR 0 x20
#define RCC_PLLCKSELR 0 x28
#define RCC_PLLCFGR 0 x2C
#define RCC_PLL1DIVR 0 x30
#define RCC_PLL1FRACR 0 x34
#define RCC_PLL2DIVR 0 x38
#define RCC_PLL2FRACR 0 x3C
#define RCC_PLL3DIVR 0 x40
#define RCC_PLL3FRACR 0 x44
#define RCC_D1CCIPR 0 x4C
#define RCC_D2CCIP1R 0 x50
#define RCC_D2CCIP2R 0 x54
#define RCC_D3CCIPR 0 x58
#define RCC_BDCR 0 x70
#define RCC_CSR 0 x74
#define RCC_AHB3ENR 0 xD4
#define RCC_AHB1ENR 0 xD8
#define RCC_AHB2ENR 0 xDC
#define RCC_AHB4ENR 0 xE0
#define RCC_APB3ENR 0 xE4
#define RCC_APB1LENR 0 xE8
#define RCC_APB1HENR 0 xEC
#define RCC_APB2ENR 0 xF0
#define RCC_APB4ENR 0 xF4
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 ) & 0 x01;
prescaler = (readl(base + RCC_D2CFGR) >> dppre_shift) & 0 x03;
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;
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) & 0 x01;
}
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 int odf_divider_determine_rate(struct clk_hw *hw,
struct clk_rate_request *req)
{
return clk_divider_ops.determine_rate(hw, req);
}
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,
.determine_rate = odf_divider_determine_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)\
{\
.gate_offset = _gate_offset,\
.bit_idx = _bit_idx,\
.name = _name,\
.parent = _parent,\
.flags = _flags,\
}
#define PER_CLK(_gate_offset, _bit_idx, _name, _parent)\
PER_CLKF(_gate_offset, _bit_idx, _name, _parent, 0 )
static const struct pclk_t pclk[] = {
PER_CLK(RCC_AHB3ENR, 31 , "d1sram1" , "hclk" ),
PER_CLK(RCC_AHB3ENR, 30 , "itcm" , "hclk" ),
PER_CLK(RCC_AHB3ENR, 29 , "dtcm2" , "hclk" ),
PER_CLK(RCC_AHB3ENR, 28 , "dtcm1" , "hclk" ),
PER_CLK(RCC_AHB3ENR, 8 , "flitf" , "hclk" ),
PER_CLK(RCC_AHB3ENR, 5 , "jpgdec" , "hclk" ),
PER_CLK(RCC_AHB3ENR, 4 , "dma2d" , "hclk" ),
PER_CLK(RCC_AHB3ENR, 0 , "mdma" , "hclk" ),
PER_CLK(RCC_AHB1ENR, 28 , "usb2ulpi" , "hclk" ),
PER_CLK(RCC_AHB1ENR, 26 , "usb1ulpi" , "hclk" ),
PER_CLK(RCC_AHB1ENR, 17 , "eth1rx" , "hclk" ),
PER_CLK(RCC_AHB1ENR, 16 , "eth1tx" , "hclk" ),
PER_CLK(RCC_AHB1ENR, 15 , "eth1mac" , "hclk" ),
PER_CLK(RCC_AHB1ENR, 14 , "art" , "hclk" ),
PER_CLK(RCC_AHB1ENR, 1 , "dma2" , "hclk" ),
PER_CLK(RCC_AHB1ENR, 0 , "dma1" , "hclk" ),
PER_CLK(RCC_AHB2ENR, 31 , "d2sram3" , "hclk" ),
PER_CLK(RCC_AHB2ENR, 30 , "d2sram2" , "hclk" ),
PER_CLK(RCC_AHB2ENR, 29 , "d2sram1" , "hclk" ),
PER_CLK(RCC_AHB2ENR, 5 , "hash" , "hclk" ),
PER_CLK(RCC_AHB2ENR, 4 , "crypt" , "hclk" ),
PER_CLK(RCC_AHB2ENR, 0 , "camitf" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 28 , "bkpram" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 25 , "hsem" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 21 , "bdma" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 19 , "crc" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 10 , "gpiok" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 9 , "gpioj" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 8 , "gpioi" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 7 , "gpioh" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 6 , "gpiog" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 5 , "gpiof" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 4 , "gpioe" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 3 , "gpiod" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 2 , "gpioc" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 1 , "gpiob" , "hclk" ),
PER_CLK(RCC_AHB4ENR, 0 , "gpioa" , "hclk" ),
PER_CLK(RCC_APB3ENR, 6 , "wwdg1" , "pclk3" ),
PER_CLK(RCC_APB1LENR, 29 , "dac12" , "pclk1" ),
PER_CLK(RCC_APB1LENR, 11 , "wwdg2" , "pclk1" ),
PER_CLK(RCC_APB1LENR, 8 , "tim14" , "tim1_ker" ),
PER_CLK(RCC_APB1LENR, 7 , "tim13" , "tim1_ker" ),
PER_CLK(RCC_APB1LENR, 6 , "tim12" , "tim1_ker" ),
PER_CLK(RCC_APB1LENR, 5 , "tim7" , "tim1_ker" ),
PER_CLK(RCC_APB1LENR, 4 , "tim6" , "tim1_ker" ),
PER_CLK(RCC_APB1LENR, 3 , "tim5" , "tim1_ker" ),
PER_CLK(RCC_APB1LENR, 2 , "tim4" , "tim1_ker" ),
PER_CLK(RCC_APB1LENR, 1 , "tim3" , "tim1_ker" ),
PER_CLK(RCC_APB1LENR, 0 , "tim2" , "tim1_ker" ),
PER_CLK(RCC_APB1HENR, 5 , "mdios" , "pclk1" ),
PER_CLK(RCC_APB1HENR, 4 , "opamp" , "pclk1" ),
PER_CLK(RCC_APB1HENR, 1 , "crs" , "pclk1" ),
PER_CLK(RCC_APB2ENR, 18 , "tim17" , "tim2_ker" ),
PER_CLK(RCC_APB2ENR, 17 , "tim16" , "tim2_ker" ),
PER_CLK(RCC_APB2ENR, 16 , "tim15" , "tim2_ker" ),
PER_CLK(RCC_APB2ENR, 1 , "tim8" , "tim2_ker" ),
PER_CLK(RCC_APB2ENR, 0 , "tim1" , "tim2_ker" ),
PER_CLK(RCC_APB4ENR, 26 , "tmpsens" , "pclk4" ),
PER_CLK(RCC_APB4ENR, 16 , "rtcapb" , "pclk4" ),
PER_CLK(RCC_APB4ENR, 15 , "vref" , "pclk4" ),
PER_CLK(RCC_APB4ENR, 14 , "comp12" , "pclk4" ),
PER_CLK(RCC_APB4ENR, 1 , "syscfg" , "pclk4" ),
};
/* KERNEL CLOCKS */
#define KER_CLKF(_gate_offset, _bit_idx,\
_mux_offset, _mux_shift, _mux_width,\
_name, _parent_name,\
_flags) \
{ \
.gate = &(struct gate_cfg) {_gate_offset, _bit_idx},\
.mux = &(struct muxdiv_cfg) {_mux_offset, _mux_shift, _mux_width },\
.name = _name, \
.parent_name = _parent_name, \
.num_parents = ARRAY_SIZE(_parent_name),\
.flags = _flags,\
}
#define KER_CLK(_gate_offset, _bit_idx, _mux_offset, _mux_shift, _mux_width,\
_name, _parent_name) \
KER_CLKF(_gate_offset, _bit_idx, _mux_offset, _mux_shift, _mux_width,\
_name, _parent_name, 0 )\
#define KER_CLKF_NOMUX(_gate_offset, _bit_idx,\
_name, _parent_name,\
_flags) \
{ \
.gate = &(struct gate_cfg) {_gate_offset, _bit_idx},\
.mux = NULL,\
.name = _name, \
.parent_name = _parent_name, \
.num_parents = 1 ,\
.flags = _flags,\
}
static const struct composite_clk_cfg kclk[] = {
KER_CLK(RCC_AHB3ENR, 16 , RCC_D1CCIPR, 16 , 1 , "sdmmc1" , sdmmc_src),
KER_CLKF(RCC_AHB3ENR, 14 , RCC_D1CCIPR, 4 , 2 , "quadspi" , qspi_src,
CLK_IGNORE_UNUSED),
KER_CLKF(RCC_AHB3ENR, 12 , RCC_D1CCIPR, 0 , 2 , "fmc" , fmc_src,
CLK_IGNORE_UNUSED),
KER_CLK(RCC_AHB1ENR, 27 , RCC_D2CCIP2R, 20 , 2 , "usb2otg" , usbotg_src),
KER_CLK(RCC_AHB1ENR, 25 , RCC_D2CCIP2R, 20 , 2 , "usb1otg" , usbotg_src),
KER_CLK(RCC_AHB1ENR, 5 , RCC_D3CCIPR, 16 , 2 , "adc12" , adc_src),
KER_CLK(RCC_AHB2ENR, 9 , RCC_D1CCIPR, 16 , 1 , "sdmmc2" , sdmmc_src),
KER_CLK(RCC_AHB2ENR, 6 , RCC_D2CCIP2R, 8 , 2 , "rng" , rng_src),
KER_CLK(RCC_AHB4ENR, 24 , RCC_D3CCIPR, 16 , 2 , "adc3" , adc_src),
KER_CLKF(RCC_APB3ENR, 4 , RCC_D1CCIPR, 8 , 1 , "dsi" , dsi_src,
CLK_SET_RATE_PARENT),
KER_CLKF_NOMUX(RCC_APB3ENR, 3 , "ltdc" , ltdc_src, CLK_SET_RATE_PARENT),
KER_CLK(RCC_APB1LENR, 31 , RCC_D2CCIP2R, 0 , 3 , "usart8" , usart_src2),
KER_CLK(RCC_APB1LENR, 30 , RCC_D2CCIP2R, 0 , 3 , "usart7" , usart_src2),
KER_CLK(RCC_APB1LENR, 27 , RCC_D2CCIP2R, 22 , 2 , "hdmicec" , cec_src),
KER_CLK(RCC_APB1LENR, 23 , RCC_D2CCIP2R, 12 , 2 , "i2c3" , i2c_src1),
KER_CLK(RCC_APB1LENR, 22 , RCC_D2CCIP2R, 12 , 2 , "i2c2" , i2c_src1),
KER_CLK(RCC_APB1LENR, 21 , RCC_D2CCIP2R, 12 , 2 , "i2c1" , i2c_src1),
KER_CLK(RCC_APB1LENR, 20 , RCC_D2CCIP2R, 0 , 3 , "uart5" , usart_src2),
KER_CLK(RCC_APB1LENR, 19 , RCC_D2CCIP2R, 0 , 3 , "uart4" , usart_src2),
KER_CLK(RCC_APB1LENR, 18 , RCC_D2CCIP2R, 0 , 3 , "usart3" , usart_src2),
KER_CLK(RCC_APB1LENR, 17 , RCC_D2CCIP2R, 0 , 3 , "usart2" , usart_src2),
KER_CLK(RCC_APB1LENR, 16 , RCC_D2CCIP1R, 20 , 2 , "spdifrx" , spdifrx_src),
KER_CLK(RCC_APB1LENR, 15 , RCC_D2CCIP1R, 16 , 3 , "spi3" , spi_src1),
KER_CLK(RCC_APB1LENR, 14 , RCC_D2CCIP1R, 16 , 3 , "spi2" , spi_src1),
KER_CLK(RCC_APB1LENR, 9 , RCC_D2CCIP2R, 28 , 3 , "lptim1" , lptim_src1),
KER_CLK(RCC_APB1HENR, 8 , RCC_D2CCIP1R, 28 , 2 , "fdcan" , fdcan_src),
KER_CLK(RCC_APB1HENR, 2 , RCC_D2CCIP1R, 31 , 1 , "swp" , swp_src),
KER_CLK(RCC_APB2ENR, 29 , RCC_CFGR, 14 , 1 , "hrtim" , hrtim_src),
KER_CLK(RCC_APB2ENR, 28 , RCC_D2CCIP1R, 24 , 1 , "dfsdm1" , dfsdm1_src),
KER_CLKF(RCC_APB2ENR, 24 , RCC_D2CCIP1R, 6 , 3 , "sai3" , sai_src,
CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT),
KER_CLKF(RCC_APB2ENR, 23 , RCC_D2CCIP1R, 6 , 3 , "sai2" , sai_src,
CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT),
KER_CLKF(RCC_APB2ENR, 22 , RCC_D2CCIP1R, 0 , 3 , "sai1" , sai_src,
CLK_SET_RATE_PARENT | CLK_SET_RATE_NO_REPARENT),
KER_CLK(RCC_APB2ENR, 20 , RCC_D2CCIP1R, 16 , 3 , "spi5" , spi_src2),
KER_CLK(RCC_APB2ENR, 13 , RCC_D2CCIP1R, 16 , 3 , "spi4" , spi_src2),
KER_CLK(RCC_APB2ENR, 12 , RCC_D2CCIP1R, 16 , 3 , "spi1" , spi_src1),
KER_CLK(RCC_APB2ENR, 5 , RCC_D2CCIP2R, 3 , 3 , "usart6" , usart_src1),
KER_CLK(RCC_APB2ENR, 4 , RCC_D2CCIP2R, 3 , 3 , "usart1" , usart_src1),
KER_CLK(RCC_APB4ENR, 21 , RCC_D3CCIPR, 24 , 3 , "sai4b" , sai_src),
KER_CLK(RCC_APB4ENR, 21 , RCC_D3CCIPR, 21 , 3 , "sai4a" , sai_src),
KER_CLK(RCC_APB4ENR, 12 , RCC_D3CCIPR, 13 , 3 , "lptim5" , lptim_src2),
KER_CLK(RCC_APB4ENR, 11 , RCC_D3CCIPR, 13 , 3 , "lptim4" , lptim_src2),
KER_CLK(RCC_APB4ENR, 10 , RCC_D3CCIPR, 13 , 3 , "lptim3" , lptim_src2),
KER_CLK(RCC_APB4ENR, 9 , RCC_D3CCIPR, 10 , 3 , "lptim2" , lptim_src2),
KER_CLK(RCC_APB4ENR, 7 , RCC_D3CCIPR, 8 , 2 , "i2c4" , i2c_src2),
KER_CLK(RCC_APB4ENR, 5 , RCC_D3CCIPR, 28 , 3 , "spi6" , spi_src3),
KER_CLK(RCC_APB4ENR, 3 , RCC_D3CCIPR, 0 , 3 , "lpuart1" , lpuart1_src),
};
static struct composite_clk_gcfg kernel_clk_cfg = {
M_CFG_MUX(NULL, 0 ),
M_CFG_GATE(NULL, 0 ),
};
/* RTC clock */
/*
* RTC & LSE registers are protected against parasitic write access.
* PWR_CR_DBP bit must be set to enable write access to RTC registers.
*/
/* STM32_PWR_CR */
#define PWR_CR 0 x00
/* STM32_PWR_CR bit field */
#define PWR_CR_DBP BIT(8 )
static struct composite_clk_gcfg rtc_clk_cfg = {
M_CFG_MUX(NULL, 0 ),
M_CFG_GATE(NULL, 0 ),
};
static const struct composite_clk_cfg rtc_clk =
KER_CLK(RCC_BDCR, 15 , RCC_BDCR, 8 , 2 , "rtc_ck" , rtc_src);
/* Micro-controller output clock */
static struct composite_clk_gcfg mco_clk_cfg = {
M_CFG_MUX(NULL, 0 ),
M_CFG_DIV(NULL, CLK_DIVIDER_ONE_BASED | CLK_DIVIDER_ALLOW_ZERO),
};
#define M_MCO_F(_name, _parents, _mux_offset, _mux_shift, _mux_width,\
_rate_offset, _rate_shift, _rate_width,\
_flags)\
{\
.mux = &(struct muxdiv_cfg) {_mux_offset, _mux_shift, _mux_width },\
.div = &(struct muxdiv_cfg) {_rate_offset, _rate_shift, _rate_width},\
.gate = NULL,\
.name = _name,\
.parent_name = _parents,\
.num_parents = ARRAY_SIZE(_parents),\
.flags = _flags,\
}
static const struct composite_clk_cfg mco_clk[] = {
M_MCO_F("mco1" , mco_src1, RCC_CFGR, 22 , 4 , RCC_CFGR, 18 , 4 , 0 ),
M_MCO_F("mco2" , mco_src2, RCC_CFGR, 29 , 3 , RCC_CFGR, 25 , 4 , 0 ),
};
static void __init stm32h7_rcc_init(struct device_node *np)
{
struct clk_hw_onecell_data *clk_data;
struct composite_cfg c_cfg;
int n;
const char *hse_clk, *lse_clk, *i2s_clk;
struct regmap *pdrm;
clk_data = kzalloc(struct_size(clk_data, hws, STM32H7_MAX_CLKS),
GFP_KERNEL);
if (!clk_data)
return ;
clk_data->num = STM32H7_MAX_CLKS;
hws = clk_data->hws;
for (n = 0 ; n < STM32H7_MAX_CLKS; n++)
hws[n] = ERR_PTR(-ENOENT);
/* get RCC base @ from DT */
base = of_iomap(np, 0 );
if (!base) {
pr_err("%pOFn: unable to map resource" , np);
goto err_free_clks;
}
pdrm = syscon_regmap_lookup_by_phandle(np, "st,syscfg" );
if (IS_ERR(pdrm))
pr_warn("%s: Unable to get syscfg\n" , __func__);
else
/* In any case disable backup domain write protection
* and will never be enabled.
* Needed by LSE & RTC clocks.
*/
regmap_update_bits(pdrm, PWR_CR, PWR_CR_DBP, PWR_CR_DBP);
/* Put parent names from DT */
hse_clk = of_clk_get_parent_name(np, 0 );
lse_clk = of_clk_get_parent_name(np, 1 );
i2s_clk = of_clk_get_parent_name(np, 2 );
sai_src[3 ] = i2s_clk;
spi_src1[3 ] = i2s_clk;
/* Register Internal oscillators */
clk_hw_register_fixed_rate(NULL, "clk-hsi" , NULL, 0 , 64000000 );
clk_hw_register_fixed_rate(NULL, "clk-csi" , NULL, 0 , 4000000 );
clk_hw_register_fixed_rate(NULL, "clk-lsi" , NULL, 0 , 32000 );
clk_hw_register_fixed_rate(NULL, "clk-rc48" , NULL, 0 , 48000 );
/* This clock is coming from outside. Frequencies unknown */
hws[CK_DSI_PHY] = clk_hw_register_fixed_rate(NULL, "ck_dsi_phy" , NULL,
0 , 0 );
hws[HSI_DIV] = clk_hw_register_divider(NULL, "hsidiv" , "clk-hsi" , 0 ,
base + RCC_CR, 3 , 2 , CLK_DIVIDER_POWER_OF_TWO,
&stm32rcc_lock);
hws[HSE_1M] = clk_hw_register_divider(NULL, "hse_1M" , "hse_ck" , 0 ,
base + RCC_CFGR, 8 , 6 , CLK_DIVIDER_ONE_BASED |
CLK_DIVIDER_ALLOW_ZERO,
&stm32rcc_lock);
/* Mux system clocks */
for (n = 0 ; n < ARRAY_SIZE(stm32_mclk); n++)
hws[MCLK_BANK + n] = clk_hw_register_mux(NULL,
stm32_mclk[n].name,
stm32_mclk[n].parents,
stm32_mclk[n].num_parents,
stm32_mclk[n].flags,
stm32_mclk[n].offset + base,
stm32_mclk[n].shift,
stm32_mclk[n].width,
0 ,
&stm32rcc_lock);
register_core_and_bus_clocks();
/* Oscillary clocks */
for (n = 0 ; n < ARRAY_SIZE(stm32_oclk); n++)
hws[OSC_BANK + n] = clk_register_ready_gate(NULL,
stm32_oclk[n].name,
stm32_oclk[n].parent,
stm32_oclk[n].gate_offset + base,
stm32_oclk[n].bit_idx,
stm32_oclk[n].bit_rdy,
stm32_oclk[n].flags,
&stm32rcc_lock);
hws[HSE_CK] = clk_register_ready_gate(NULL,
"hse_ck" ,
hse_clk,
RCC_CR + base,
16 , 17 ,
0 ,
&stm32rcc_lock);
hws[LSE_CK] = clk_register_ready_gate(NULL,
"lse_ck" ,
lse_clk,
RCC_BDCR + base,
0 , 1 ,
0 ,
&stm32rcc_lock);
hws[CSI_KER_DIV122 + n] = clk_hw_register_fixed_factor(NULL,
"csi_ker_div122" , "csi_ker" , 0 , 1 , 122 );
/* PLLs */
for (n = 0 ; n < ARRAY_SIZE(stm32_pll); n++) {
int odf;
/* Register the VCO */
clk_register_stm32_pll(NULL, stm32_pll[n].name,
stm32_pll[n].parent_name, stm32_pll[n].flags,
stm32_pll[n].cfg,
&stm32rcc_lock);
/* Register the 3 output dividers */
for (odf = 0 ; odf < 3 ; odf++) {
int idx = n * 3 + odf;
get_cfg_composite_div(&odf_clk_gcfg, &stm32_odf[n][odf],
&c_cfg, &stm32rcc_lock);
hws[ODF_BANK + idx] = clk_hw_register_composite(NULL,
stm32_odf[n][odf].name,
stm32_odf[n][odf].parent_name,
stm32_odf[n][odf].num_parents,
c_cfg.mux_hw, c_cfg.mux_ops,
c_cfg.div_hw, c_cfg.div_ops,
c_cfg.gate_hw, c_cfg.gate_ops,
stm32_odf[n][odf].flags);
}
}
/* Peripheral clocks */
for (n = 0 ; n < ARRAY_SIZE(pclk); n++)
hws[PERIF_BANK + n] = clk_hw_register_gate(NULL, pclk[n].name,
pclk[n].parent,
pclk[n].flags, base + pclk[n].gate_offset,
pclk[n].bit_idx, pclk[n].flags, &stm32rcc_lock);
/* Kernel clocks */
for (n = 0 ; n < ARRAY_SIZE(kclk); n++) {
get_cfg_composite_div(&kernel_clk_cfg, &kclk[n], &c_cfg,
&stm32rcc_lock);
hws[KERN_BANK + n] = clk_hw_register_composite(NULL,
kclk[n].name,
kclk[n].parent_name,
kclk[n].num_parents,
c_cfg.mux_hw, c_cfg.mux_ops,
c_cfg.div_hw, c_cfg.div_ops,
c_cfg.gate_hw, c_cfg.gate_ops,
kclk[n].flags);
}
/* RTC clock (default state is off) */
clk_hw_register_fixed_rate(NULL, "off" , NULL, 0 , 0 );
get_cfg_composite_div(&rtc_clk_cfg, &rtc_clk, &c_cfg, &stm32rcc_lock);
hws[RTC_CK] = clk_hw_register_composite(NULL,
rtc_clk.name,
rtc_clk.parent_name,
rtc_clk.num_parents,
c_cfg.mux_hw, c_cfg.mux_ops,
c_cfg.div_hw, c_cfg.div_ops,
c_cfg.gate_hw, c_cfg.gate_ops,
rtc_clk.flags);
/* Micro-controller clocks */
for (n = 0 ; n < ARRAY_SIZE(mco_clk); n++) {
get_cfg_composite_div(&mco_clk_cfg, &mco_clk[n], &c_cfg,
&stm32rcc_lock);
hws[MCO_BANK + n] = clk_hw_register_composite(NULL,
mco_clk[n].name,
mco_clk[n].parent_name,
mco_clk[n].num_parents,
c_cfg.mux_hw, c_cfg.mux_ops,
c_cfg.div_hw, c_cfg.div_ops,
c_cfg.gate_hw, c_cfg.gate_ops,
mco_clk[n].flags);
}
of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_data);
return ;
err_free_clks:
kfree(clk_data);
}
/* The RCC node is a clock and reset controller, and these
* functionalities are supported by different drivers that
* matches the same compatible strings.
*/
CLK_OF_DECLARE_DRIVER(stm32h7_rcc, "st,stm32h743-rcc" , stm32h7_rcc_init);
Messung V0.5 in Prozent C=97 H=95 G=95
¤ Dauer der Verarbeitung: 0.14 Sekunden
(vorverarbeitet am 2026-06-08)
¤
*© Formatika GbR, Deutschland