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linux/drivers/clk/clk-stm32mp1.c
Colin Ian King d66e4c985d clk: stm32mp1: remove redundant assignment to pointer data 
The pointer data is being initialized with a value and a few lines
later on being re-assigned the same value, so this re-assignment is
redundant. Clean up the code and remove it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20211126221239.1100960-1-colin.i.king@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2021-12-15 22:48:28 -08:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) STMicroelectronics 2018 - All Rights Reserved
* Author: Olivier Bideau <olivier.bideau@st.com> for STMicroelectronics.
* Author: Gabriel Fernandez <gabriel.fernandez@st.com> for STMicroelectronics.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/reset-controller.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <dt-bindings/clock/stm32mp1-clks.h>
static DEFINE_SPINLOCK(rlock);
#define RCC_OCENSETR 0x0C
#define RCC_HSICFGR 0x18
#define RCC_RDLSICR 0x144
#define RCC_PLL1CR 0x80
#define RCC_PLL1CFGR1 0x84
#define RCC_PLL1CFGR2 0x88
#define RCC_PLL2CR 0x94
#define RCC_PLL2CFGR1 0x98
#define RCC_PLL2CFGR2 0x9C
#define RCC_PLL3CR 0x880
#define RCC_PLL3CFGR1 0x884
#define RCC_PLL3CFGR2 0x888
#define RCC_PLL4CR 0x894
#define RCC_PLL4CFGR1 0x898
#define RCC_PLL4CFGR2 0x89C
#define RCC_APB1ENSETR 0xA00
#define RCC_APB2ENSETR 0xA08
#define RCC_APB3ENSETR 0xA10
#define RCC_APB4ENSETR 0x200
#define RCC_APB5ENSETR 0x208
#define RCC_AHB2ENSETR 0xA18
#define RCC_AHB3ENSETR 0xA20
#define RCC_AHB4ENSETR 0xA28
#define RCC_AHB5ENSETR 0x210
#define RCC_AHB6ENSETR 0x218
#define RCC_AHB6LPENSETR 0x318
#define RCC_RCK12SELR 0x28
#define RCC_RCK3SELR 0x820
#define RCC_RCK4SELR 0x824
#define RCC_MPCKSELR 0x20
#define RCC_ASSCKSELR 0x24
#define RCC_MSSCKSELR 0x48
#define RCC_SPI6CKSELR 0xC4
#define RCC_SDMMC12CKSELR 0x8F4
#define RCC_SDMMC3CKSELR 0x8F8
#define RCC_FMCCKSELR 0x904
#define RCC_I2C46CKSELR 0xC0
#define RCC_I2C12CKSELR 0x8C0
#define RCC_I2C35CKSELR 0x8C4
#define RCC_UART1CKSELR 0xC8
#define RCC_QSPICKSELR 0x900
#define RCC_ETHCKSELR 0x8FC
#define RCC_RNG1CKSELR 0xCC
#define RCC_RNG2CKSELR 0x920
#define RCC_GPUCKSELR 0x938
#define RCC_USBCKSELR 0x91C
#define RCC_STGENCKSELR 0xD4
#define RCC_SPDIFCKSELR 0x914
#define RCC_SPI2S1CKSELR 0x8D8
#define RCC_SPI2S23CKSELR 0x8DC
#define RCC_SPI2S45CKSELR 0x8E0
#define RCC_CECCKSELR 0x918
#define RCC_LPTIM1CKSELR 0x934
#define RCC_LPTIM23CKSELR 0x930
#define RCC_LPTIM45CKSELR 0x92C
#define RCC_UART24CKSELR 0x8E8
#define RCC_UART35CKSELR 0x8EC
#define RCC_UART6CKSELR 0x8E4
#define RCC_UART78CKSELR 0x8F0
#define RCC_FDCANCKSELR 0x90C
#define RCC_SAI1CKSELR 0x8C8
#define RCC_SAI2CKSELR 0x8CC
#define RCC_SAI3CKSELR 0x8D0
#define RCC_SAI4CKSELR 0x8D4
#define RCC_ADCCKSELR 0x928
#define RCC_MPCKDIVR 0x2C
#define RCC_DSICKSELR 0x924
#define RCC_CPERCKSELR 0xD0
#define RCC_MCO1CFGR 0x800
#define RCC_MCO2CFGR 0x804
#define RCC_BDCR 0x140
#define RCC_AXIDIVR 0x30
#define RCC_MCUDIVR 0x830
#define RCC_APB1DIVR 0x834
#define RCC_APB2DIVR 0x838
#define RCC_APB3DIVR 0x83C
#define RCC_APB4DIVR 0x3C
#define RCC_APB5DIVR 0x40
#define RCC_TIMG1PRER 0x828
#define RCC_TIMG2PRER 0x82C
#define RCC_RTCDIVR 0x44
#define RCC_DBGCFGR 0x80C
#define RCC_CLR 0x4
static const char * const ref12_parents[] = {
"ck_hsi", "ck_hse"
};
static const char * const ref3_parents[] = {
"ck_hsi", "ck_hse", "ck_csi"
};
static const char * const ref4_parents[] = {
"ck_hsi", "ck_hse", "ck_csi"
};
static const char * const cpu_src[] = {
"ck_hsi", "ck_hse", "pll1_p"
};
static const char * const axi_src[] = {
"ck_hsi", "ck_hse", "pll2_p"
};
static const char * const per_src[] = {
"ck_hsi", "ck_csi", "ck_hse"
};
static const char * const mcu_src[] = {
"ck_hsi", "ck_hse", "ck_csi", "pll3_p"
};
static const char * const sdmmc12_src[] = {
"ck_axi", "pll3_r", "pll4_p", "ck_hsi"
};
static const char * const sdmmc3_src[] = {
"ck_mcu", "pll3_r", "pll4_p", "ck_hsi"
};
static const char * const fmc_src[] = {
"ck_axi", "pll3_r", "pll4_p", "ck_per"
};
static const char * const qspi_src[] = {
"ck_axi", "pll3_r", "pll4_p", "ck_per"
};
static const char * const eth_src[] = {
"pll4_p", "pll3_q"
};
static const char * const rng_src[] = {
"ck_csi", "pll4_r", "ck_lse", "ck_lsi"
};
static const char * const usbphy_src[] = {
"ck_hse", "pll4_r", "clk-hse-div2"
};
static const char * const usbo_src[] = {
"pll4_r", "ck_usbo_48m"
};
static const char * const stgen_src[] = {
"ck_hsi", "ck_hse"
};
static const char * const spdif_src[] = {
"pll4_p", "pll3_q", "ck_hsi"
};
static const char * const spi123_src[] = {
"pll4_p", "pll3_q", "i2s_ckin", "ck_per", "pll3_r"
};
static const char * const spi45_src[] = {
"pclk2", "pll4_q", "ck_hsi", "ck_csi", "ck_hse"
};
static const char * const spi6_src[] = {
"pclk5", "pll4_q", "ck_hsi", "ck_csi", "ck_hse", "pll3_q"
};
static const char * const cec_src[] = {
"ck_lse", "ck_lsi", "ck_csi"
};
static const char * const i2c12_src[] = {
"pclk1", "pll4_r", "ck_hsi", "ck_csi"
};
static const char * const i2c35_src[] = {
"pclk1", "pll4_r", "ck_hsi", "ck_csi"
};
static const char * const i2c46_src[] = {
"pclk5", "pll3_q", "ck_hsi", "ck_csi"
};
static const char * const lptim1_src[] = {
"pclk1", "pll4_p", "pll3_q", "ck_lse", "ck_lsi", "ck_per"
};
static const char * const lptim23_src[] = {
"pclk3", "pll4_q", "ck_per", "ck_lse", "ck_lsi"
};
static const char * const lptim45_src[] = {
"pclk3", "pll4_p", "pll3_q", "ck_lse", "ck_lsi", "ck_per"
};
static const char * const usart1_src[] = {
"pclk5", "pll3_q", "ck_hsi", "ck_csi", "pll4_q", "ck_hse"
};
static const char * const usart234578_src[] = {
"pclk1", "pll4_q", "ck_hsi", "ck_csi", "ck_hse"
};
static const char * const usart6_src[] = {
"pclk2", "pll4_q", "ck_hsi", "ck_csi", "ck_hse"
};
static const char * const fdcan_src[] = {
"ck_hse", "pll3_q", "pll4_q", "pll4_r"
};
static const char * const sai_src[] = {
"pll4_q", "pll3_q", "i2s_ckin", "ck_per", "pll3_r"
};
static const char * const sai2_src[] = {
"pll4_q", "pll3_q", "i2s_ckin", "ck_per", "spdif_ck_symb", "pll3_r"
};
static const char * const adc12_src[] = {
"pll4_r", "ck_per", "pll3_q"
};
static const char * const dsi_src[] = {
"ck_dsi_phy", "pll4_p"
};
static const char * const rtc_src[] = {
"off", "ck_lse", "ck_lsi", "ck_hse"
};
static const char * const mco1_src[] = {
"ck_hsi", "ck_hse", "ck_csi", "ck_lsi", "ck_lse"
};
static const char * const mco2_src[] = {
"ck_mpu", "ck_axi", "ck_mcu", "pll4_p", "ck_hse", "ck_hsi"
};
static const char * const ck_trace_src[] = {
"ck_axi"
};
static const struct clk_div_table axi_div_table[] = {
{ 0, 1 }, { 1, 2 }, { 2, 3 }, { 3, 4 },
{ 4, 4 }, { 5, 4 }, { 6, 4 }, { 7, 4 },
{ 0 },
};
static const struct clk_div_table mcu_div_table[] = {
{ 0, 1 }, { 1, 2 }, { 2, 4 }, { 3, 8 },
{ 4, 16 }, { 5, 32 }, { 6, 64 }, { 7, 128 },
{ 8, 256 }, { 9, 512 }, { 10, 512}, { 11, 512 },
{ 12, 512 }, { 13, 512 }, { 14, 512}, { 15, 512 },
{ 0 },
};
static const struct clk_div_table apb_div_table[] = {
{ 0, 1 }, { 1, 2 }, { 2, 4 }, { 3, 8 },
{ 4, 16 }, { 5, 16 }, { 6, 16 }, { 7, 16 },
{ 0 },
};
static const struct clk_div_table ck_trace_div_table[] = {
{ 0, 1 }, { 1, 2 }, { 2, 4 }, { 3, 8 },
{ 4, 16 }, { 5, 16 }, { 6, 16 }, { 7, 16 },
{ 0 },
};
#define MAX_MUX_CLK 2
struct stm32_mmux {
u8 nbr_clk;
struct clk_hw *hws[MAX_MUX_CLK];
};
struct stm32_clk_mmux {
struct clk_mux mux;
struct stm32_mmux *mmux;
};
struct stm32_mgate {
u8 nbr_clk;
u32 flag;
};
struct stm32_clk_mgate {
struct clk_gate gate;
struct stm32_mgate *mgate;
u32 mask;
};
struct clock_config {
u32 id;
const char *name;
const char *parent_name;
const char * const *parent_names;
int num_parents;
unsigned long flags;
void *cfg;
struct clk_hw * (*func)(struct device *dev,
struct clk_hw_onecell_data *clk_data,
void __iomem *base, spinlock_t *lock,
const struct clock_config *cfg);
};
#define NO_ID ~0
struct gate_cfg {
u32 reg_off;
u8 bit_idx;
u8 gate_flags;
};
struct fixed_factor_cfg {
unsigned int mult;
unsigned int div;
};
struct div_cfg {
u32 reg_off;
u8 shift;
u8 width;
u8 div_flags;
const struct clk_div_table *table;
};
struct mux_cfg {
u32 reg_off;
u8 shift;
u8 width;
u8 mux_flags;
u32 *table;
};
struct stm32_gate_cfg {
struct gate_cfg *gate;
struct stm32_mgate *mgate;
const struct clk_ops *ops;
};
struct stm32_div_cfg {
struct div_cfg *div;
const struct clk_ops *ops;
};
struct stm32_mux_cfg {
struct mux_cfg *mux;
struct stm32_mmux *mmux;
const struct clk_ops *ops;
};
/* STM32 Composite clock */
struct stm32_composite_cfg {
const struct stm32_gate_cfg *gate;
const struct stm32_div_cfg *div;
const struct stm32_mux_cfg *mux;
};
static struct clk_hw *
_clk_hw_register_gate(struct device *dev,
struct clk_hw_onecell_data *clk_data,
void __iomem *base, spinlock_t *lock,
const struct clock_config *cfg)
{
struct gate_cfg *gate_cfg = cfg->cfg;
return clk_hw_register_gate(dev,
cfg->name,
cfg->parent_name,
cfg->flags,
gate_cfg->reg_off + base,
gate_cfg->bit_idx,
gate_cfg->gate_flags,
lock);
}
static struct clk_hw *
_clk_hw_register_fixed_factor(struct device *dev,
struct clk_hw_onecell_data *clk_data,
void __iomem *base, spinlock_t *lock,
const struct clock_config *cfg)
{
struct fixed_factor_cfg *ff_cfg = cfg->cfg;
return clk_hw_register_fixed_factor(dev, cfg->name, cfg->parent_name,
cfg->flags, ff_cfg->mult,
ff_cfg->div);
}
static struct clk_hw *
_clk_hw_register_divider_table(struct device *dev,
struct clk_hw_onecell_data *clk_data,
void __iomem *base, spinlock_t *lock,
const struct clock_config *cfg)
{
struct div_cfg *div_cfg = cfg->cfg;
return clk_hw_register_divider_table(dev,
cfg->name,
cfg->parent_name,
cfg->flags,
div_cfg->reg_off + base,
div_cfg->shift,
div_cfg->width,
div_cfg->div_flags,
div_cfg->table,
lock);
}
static struct clk_hw *
_clk_hw_register_mux(struct device *dev,
struct clk_hw_onecell_data *clk_data,
void __iomem *base, spinlock_t *lock,
const struct clock_config *cfg)
{
struct mux_cfg *mux_cfg = cfg->cfg;
return clk_hw_register_mux(dev, cfg->name, cfg->parent_names,
cfg->num_parents, cfg->flags,
mux_cfg->reg_off + base, mux_cfg->shift,
mux_cfg->width, mux_cfg->mux_flags, lock);
}
/* MP1 Gate clock with set & clear registers */
static int mp1_gate_clk_enable(struct clk_hw *hw)
{
if (!clk_gate_ops.is_enabled(hw))
clk_gate_ops.enable(hw);
return 0;
}
static void mp1_gate_clk_disable(struct clk_hw *hw)
{
struct clk_gate *gate = to_clk_gate(hw);
unsigned long flags = 0;
if (clk_gate_ops.is_enabled(hw)) {
spin_lock_irqsave(gate->lock, flags);
writel_relaxed(BIT(gate->bit_idx), gate->reg + RCC_CLR);
spin_unlock_irqrestore(gate->lock, flags);
}
}
static const struct clk_ops mp1_gate_clk_ops = {
.enable = mp1_gate_clk_enable,
.disable = mp1_gate_clk_disable,
.is_enabled = clk_gate_is_enabled,
};
static struct clk_hw *_get_stm32_mux(struct device *dev, void __iomem *base,
const struct stm32_mux_cfg *cfg,
spinlock_t *lock)
{
struct stm32_clk_mmux *mmux;
struct clk_mux *mux;
struct clk_hw *mux_hw;
if (cfg->mmux) {
mmux = devm_kzalloc(dev, sizeof(*mmux), GFP_KERNEL);
if (!mmux)
return ERR_PTR(-ENOMEM);
mmux->mux.reg = cfg->mux->reg_off + base;
mmux->mux.shift = cfg->mux->shift;
mmux->mux.mask = (1 << cfg->mux->width) - 1;
mmux->mux.flags = cfg->mux->mux_flags;
mmux->mux.table = cfg->mux->table;
mmux->mux.lock = lock;
mmux->mmux = cfg->mmux;
mux_hw = &mmux->mux.hw;
cfg->mmux->hws[cfg->mmux->nbr_clk++] = mux_hw;
} else {
mux = devm_kzalloc(dev, sizeof(*mux), GFP_KERNEL);
if (!mux)
return ERR_PTR(-ENOMEM);
mux->reg = cfg->mux->reg_off + base;
mux->shift = cfg->mux->shift;
mux->mask = (1 << cfg->mux->width) - 1;
mux->flags = cfg->mux->mux_flags;
mux->table = cfg->mux->table;
mux->lock = lock;
mux_hw = &mux->hw;
}
return mux_hw;
}
static struct clk_hw *_get_stm32_div(struct device *dev, void __iomem *base,
const struct stm32_div_cfg *cfg,
spinlock_t *lock)
{
struct clk_divider *div;
div = devm_kzalloc(dev, sizeof(*div), GFP_KERNEL);
if (!div)
return ERR_PTR(-ENOMEM);
div->reg = cfg->div->reg_off + base;
div->shift = cfg->div->shift;
div->width = cfg->div->width;
div->flags = cfg->div->div_flags;
div->table = cfg->div->table;
div->lock = lock;
return &div->hw;
}
static struct clk_hw *_get_stm32_gate(struct device *dev, void __iomem *base,
const struct stm32_gate_cfg *cfg,
spinlock_t *lock)
{
struct stm32_clk_mgate *mgate;
struct clk_gate *gate;
struct clk_hw *gate_hw;
if (cfg->mgate) {
mgate = devm_kzalloc(dev, sizeof(*mgate), GFP_KERNEL);
if (!mgate)
return ERR_PTR(-ENOMEM);
mgate->gate.reg = cfg->gate->reg_off + base;
mgate->gate.bit_idx = cfg->gate->bit_idx;
mgate->gate.flags = cfg->gate->gate_flags;
mgate->gate.lock = lock;
mgate->mask = BIT(cfg->mgate->nbr_clk++);
mgate->mgate = cfg->mgate;
gate_hw = &mgate->gate.hw;
} else {
gate = devm_kzalloc(dev, sizeof(*gate), GFP_KERNEL);
if (!gate)
return ERR_PTR(-ENOMEM);
gate->reg = cfg->gate->reg_off + base;
gate->bit_idx = cfg->gate->bit_idx;
gate->flags = cfg->gate->gate_flags;
gate->lock = lock;
gate_hw = &gate->hw;
}
return gate_hw;
}
static struct clk_hw *
clk_stm32_register_gate_ops(struct device *dev,
const char *name,
const char *parent_name,
unsigned long flags,
void __iomem *base,
const struct stm32_gate_cfg *cfg,
spinlock_t *lock)
{
struct clk_init_data init = { NULL };
struct clk_hw *hw;
int ret;
init.name = name;
init.parent_names = &parent_name;
init.num_parents = 1;
init.flags = flags;
init.ops = &clk_gate_ops;
if (cfg->ops)
init.ops = cfg->ops;
hw = _get_stm32_gate(dev, base, cfg, lock);
if (IS_ERR(hw))
return ERR_PTR(-ENOMEM);
hw->init = &init;
ret = clk_hw_register(dev, hw);
if (ret)
hw = ERR_PTR(ret);
return hw;
}
static struct clk_hw *
clk_stm32_register_composite(struct device *dev,
const char *name, const char * const *parent_names,
int num_parents, void __iomem *base,
const struct stm32_composite_cfg *cfg,
unsigned long flags, spinlock_t *lock)
{
const struct clk_ops *mux_ops, *div_ops, *gate_ops;
struct clk_hw *mux_hw, *div_hw, *gate_hw;
mux_hw = NULL;
div_hw = NULL;
gate_hw = NULL;
mux_ops = NULL;
div_ops = NULL;
gate_ops = NULL;
if (cfg->mux) {
mux_hw = _get_stm32_mux(dev, base, cfg->mux, lock);
if (!IS_ERR(mux_hw)) {
mux_ops = &clk_mux_ops;
if (cfg->mux->ops)
mux_ops = cfg->mux->ops;
}
}
if (cfg->div) {
div_hw = _get_stm32_div(dev, base, cfg->div, lock);
if (!IS_ERR(div_hw)) {
div_ops = &clk_divider_ops;
if (cfg->div->ops)
div_ops = cfg->div->ops;
}
}
if (cfg->gate) {
gate_hw = _get_stm32_gate(dev, base, cfg->gate, lock);
if (!IS_ERR(gate_hw)) {
gate_ops = &clk_gate_ops;
if (cfg->gate->ops)
gate_ops = cfg->gate->ops;
}
}
return clk_hw_register_composite(dev, name, parent_names, num_parents,
mux_hw, mux_ops, div_hw, div_ops,
gate_hw, gate_ops, flags);
}
#define to_clk_mgate(_gate) container_of(_gate, struct stm32_clk_mgate, gate)
static int mp1_mgate_clk_enable(struct clk_hw *hw)
{
struct clk_gate *gate = to_clk_gate(hw);
struct stm32_clk_mgate *clk_mgate = to_clk_mgate(gate);
clk_mgate->mgate->flag |= clk_mgate->mask;
mp1_gate_clk_enable(hw);
return 0;
}
static void mp1_mgate_clk_disable(struct clk_hw *hw)
{
struct clk_gate *gate = to_clk_gate(hw);
struct stm32_clk_mgate *clk_mgate = to_clk_mgate(gate);
clk_mgate->mgate->flag &= ~clk_mgate->mask;
if (clk_mgate->mgate->flag == 0)
mp1_gate_clk_disable(hw);
}
static const struct clk_ops mp1_mgate_clk_ops = {
.enable = mp1_mgate_clk_enable,
.disable = mp1_mgate_clk_disable,
.is_enabled = clk_gate_is_enabled,
};
#define to_clk_mmux(_mux) container_of(_mux, struct stm32_clk_mmux, mux)
static u8 clk_mmux_get_parent(struct clk_hw *hw)
{
return clk_mux_ops.get_parent(hw);
}
static int clk_mmux_set_parent(struct clk_hw *hw, u8 index)
{
struct clk_mux *mux = to_clk_mux(hw);
struct stm32_clk_mmux *clk_mmux = to_clk_mmux(mux);
struct clk_hw *hwp;
int ret, n;
ret = clk_mux_ops.set_parent(hw, index);
if (ret)
return ret;
hwp = clk_hw_get_parent(hw);
for (n = 0; n < clk_mmux->mmux->nbr_clk; n++)
if (clk_mmux->mmux->hws[n] != hw)
clk_hw_reparent(clk_mmux->mmux->hws[n], hwp);
return 0;
}
static const struct clk_ops clk_mmux_ops = {
.get_parent = clk_mmux_get_parent,
.set_parent = clk_mmux_set_parent,
.determine_rate = __clk_mux_determine_rate,
};
/* STM32 PLL */
struct stm32_pll_obj {
/* lock pll enable/disable registers */
spinlock_t *lock;
void __iomem *reg;
struct clk_hw hw;
struct clk_mux mux;
};
#define to_pll(_hw) container_of(_hw, struct stm32_pll_obj, hw)
#define PLL_ON BIT(0)
#define PLL_RDY BIT(1)
#define DIVN_MASK 0x1FF
#define DIVM_MASK 0x3F
#define DIVM_SHIFT 16
#define DIVN_SHIFT 0
#define FRAC_OFFSET 0xC
#define FRAC_MASK 0x1FFF
#define FRAC_SHIFT 3
#define FRACLE BIT(16)
#define PLL_MUX_SHIFT 0
#define PLL_MUX_MASK 3
static int __pll_is_enabled(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
return readl_relaxed(clk_elem->reg) & PLL_ON;
}
#define TIMEOUT 5
static int pll_enable(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
u32 reg;
unsigned long flags = 0;
unsigned int timeout = TIMEOUT;
int bit_status = 0;
spin_lock_irqsave(clk_elem->lock, flags);
if (__pll_is_enabled(hw))
goto unlock;
reg = readl_relaxed(clk_elem->reg);
reg |= PLL_ON;
writel_relaxed(reg, clk_elem->reg);
/* We can't use readl_poll_timeout() because we can be 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_relaxed(clk_elem->reg) & PLL_RDY);
if (bit_status)
udelay(120);
} while (bit_status && --timeout);
unlock:
spin_unlock_irqrestore(clk_elem->lock, flags);
return bit_status;
}
static void pll_disable(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
u32 reg;
unsigned long flags = 0;
spin_lock_irqsave(clk_elem->lock, flags);
reg = readl_relaxed(clk_elem->reg);
reg &= ~PLL_ON;
writel_relaxed(reg, clk_elem->reg);
spin_unlock_irqrestore(clk_elem->lock, flags);
}
static u32 pll_frac_val(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
u32 reg, frac = 0;
reg = readl_relaxed(clk_elem->reg + FRAC_OFFSET);
if (reg & FRACLE)
frac = (reg >> FRAC_SHIFT) & FRAC_MASK;
return frac;
}
static unsigned long pll_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
u32 reg;
u32 frac, divm, divn;
u64 rate, rate_frac = 0;
reg = readl_relaxed(clk_elem->reg + 4);
divm = ((reg >> DIVM_SHIFT) & DIVM_MASK) + 1;
divn = ((reg >> DIVN_SHIFT) & DIVN_MASK) + 1;
rate = (u64)parent_rate * divn;
do_div(rate, divm);
frac = pll_frac_val(hw);
if (frac) {
rate_frac = (u64)parent_rate * (u64)frac;
do_div(rate_frac, (divm * 8192));
}
return rate + rate_frac;
}
static int pll_is_enabled(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
unsigned long flags = 0;
int ret;
spin_lock_irqsave(clk_elem->lock, flags);
ret = __pll_is_enabled(hw);
spin_unlock_irqrestore(clk_elem->lock, flags);
return ret;
}
static u8 pll_get_parent(struct clk_hw *hw)
{
struct stm32_pll_obj *clk_elem = to_pll(hw);
struct clk_hw *mux_hw = &clk_elem->mux.hw;
__clk_hw_set_clk(mux_hw, hw);
return clk_mux_ops.get_parent(mux_hw);
}
static const struct clk_ops pll_ops = {
.enable = pll_enable,
.disable = pll_disable,
.recalc_rate = pll_recalc_rate,
.is_enabled = pll_is_enabled,
.get_parent = pll_get_parent,
};
static struct clk_hw *clk_register_pll(struct device *dev, const char *name,
const char * const *parent_names,
int num_parents,
void __iomem *reg,
void __iomem *mux_reg,
unsigned long flags,
spinlock_t *lock)
{
struct stm32_pll_obj *element;
struct clk_init_data init;
struct clk_hw *hw;
int err;
element = devm_kzalloc(dev, sizeof(*element), GFP_KERNEL);
if (!element)
return ERR_PTR(-ENOMEM);
init.name = name;
init.ops = &pll_ops;
init.flags = flags;
init.parent_names = parent_names;
init.num_parents = num_parents;
element->mux.lock = lock;
element->mux.reg = mux_reg;
element->mux.shift = PLL_MUX_SHIFT;
element->mux.mask = PLL_MUX_MASK;
element->mux.flags = CLK_MUX_READ_ONLY;
element->mux.reg = mux_reg;
element->hw.init = &init;
element->reg = reg;
element->lock = lock;
hw = &element->hw;
err = clk_hw_register(dev, hw);
if (err)
return ERR_PTR(err);
return hw;
}
/* Kernel Timer */
struct timer_cker {
/* lock the kernel output divider register */
spinlock_t *lock;
void __iomem *apbdiv;
void __iomem *timpre;
struct clk_hw hw;
};
#define to_timer_cker(_hw) container_of(_hw, struct timer_cker, hw)
#define APB_DIV_MASK 0x07
#define TIM_PRE_MASK 0x01
static unsigned long __bestmult(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct timer_cker *tim_ker = to_timer_cker(hw);
u32 prescaler;
unsigned int mult = 0;
prescaler = readl_relaxed(tim_ker->apbdiv) & APB_DIV_MASK;
if (prescaler < 2)
return 1;
mult = 2;
if (rate / parent_rate >= 4)
mult = 4;
return mult;
}
static long timer_ker_round_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *parent_rate)
{
unsigned long factor = __bestmult(hw, rate, *parent_rate);
return *parent_rate * factor;
}
static int timer_ker_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
struct timer_cker *tim_ker = to_timer_cker(hw);
unsigned long flags = 0;
unsigned long factor = __bestmult(hw, rate, parent_rate);
int ret = 0;
spin_lock_irqsave(tim_ker->lock, flags);
switch (factor) {
case 1:
break;
case 2:
writel_relaxed(0, tim_ker->timpre);
break;
case 4:
writel_relaxed(1, tim_ker->timpre);
break;
default:
ret = -EINVAL;
}
spin_unlock_irqrestore(tim_ker->lock, flags);
return ret;
}
static unsigned long timer_ker_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
struct timer_cker *tim_ker = to_timer_cker(hw);
u32 prescaler, timpre;
u32 mul;
prescaler = readl_relaxed(tim_ker->apbdiv) & APB_DIV_MASK;
timpre = readl_relaxed(tim_ker->timpre) & TIM_PRE_MASK;
if (!prescaler)
return parent_rate;
mul = (timpre + 1) * 2;
return parent_rate * mul;
}
static const struct clk_ops timer_ker_ops = {
.recalc_rate = timer_ker_recalc_rate,
.round_rate = timer_ker_round_rate,
.set_rate = timer_ker_set_rate,
};
static struct clk_hw *clk_register_cktim(struct device *dev, const char *name,
const char *parent_name,
unsigned long flags,
void __iomem *apbdiv,
void __iomem *timpre,
spinlock_t *lock)
{
struct timer_cker *tim_ker;
struct clk_init_data init;
struct clk_hw *hw;
int err;
tim_ker = devm_kzalloc(dev, sizeof(*tim_ker), GFP_KERNEL);
if (!tim_ker)
return ERR_PTR(-ENOMEM);
init.name = name;
init.ops = &timer_ker_ops;
init.flags = flags;
init.parent_names = &parent_name;
init.num_parents = 1;
tim_ker->hw.init = &init;
tim_ker->lock = lock;
tim_ker->apbdiv = apbdiv;
tim_ker->timpre = timpre;
hw = &tim_ker->hw;
err = clk_hw_register(dev, hw);
if (err)
return ERR_PTR(err);
return hw;
}
/* The divider of RTC clock concerns only ck_hse clock */
#define HSE_RTC 3
static unsigned long clk_divider_rtc_recalc_rate(struct clk_hw *hw,
unsigned long parent_rate)
{
if (clk_hw_get_parent(hw) == clk_hw_get_parent_by_index(hw, HSE_RTC))
return clk_divider_ops.recalc_rate(hw, parent_rate);
return parent_rate;
}
static int clk_divider_rtc_set_rate(struct clk_hw *hw, unsigned long rate,
unsigned long parent_rate)
{
if (clk_hw_get_parent(hw) == clk_hw_get_parent_by_index(hw, HSE_RTC))
return clk_divider_ops.set_rate(hw, rate, parent_rate);
return parent_rate;
}
static int clk_divider_rtc_determine_rate(struct clk_hw *hw, struct clk_rate_request *req)
{
if (req->best_parent_hw == clk_hw_get_parent_by_index(hw, HSE_RTC))
return clk_divider_ops.determine_rate(hw, req);
req->rate = req->best_parent_rate;
return 0;
}
static const struct clk_ops rtc_div_clk_ops = {
.recalc_rate = clk_divider_rtc_recalc_rate,
.set_rate = clk_divider_rtc_set_rate,
.determine_rate = clk_divider_rtc_determine_rate
};
struct stm32_pll_cfg {
u32 offset;
u32 muxoff;
};
static struct clk_hw *_clk_register_pll(struct device *dev,
struct clk_hw_onecell_data *clk_data,
void __iomem *base, spinlock_t *lock,
const struct clock_config *cfg)
{
struct stm32_pll_cfg *stm_pll_cfg = cfg->cfg;
return clk_register_pll(dev, cfg->name, cfg->parent_names,
cfg->num_parents,
base + stm_pll_cfg->offset,
base + stm_pll_cfg->muxoff,
cfg->flags, lock);
}
struct stm32_cktim_cfg {
u32 offset_apbdiv;
u32 offset_timpre;
};
static struct clk_hw *_clk_register_cktim(struct device *dev,
struct clk_hw_onecell_data *clk_data,
void __iomem *base, spinlock_t *lock,
const struct clock_config *cfg)
{
struct stm32_cktim_cfg *cktim_cfg = cfg->cfg;
return clk_register_cktim(dev, cfg->name, cfg->parent_name, cfg->flags,
cktim_cfg->offset_apbdiv + base,
cktim_cfg->offset_timpre + base, lock);
}
static struct clk_hw *
_clk_stm32_register_gate(struct device *dev,
struct clk_hw_onecell_data *clk_data,
void __iomem *base, spinlock_t *lock,
const struct clock_config *cfg)
{
return clk_stm32_register_gate_ops(dev,
cfg->name,
cfg->parent_name,
cfg->flags,
base,
cfg->cfg,
lock);
}
static struct clk_hw *
_clk_stm32_register_composite(struct device *dev,
struct clk_hw_onecell_data *clk_data,
void __iomem *base, spinlock_t *lock,
const struct clock_config *cfg)
{
return clk_stm32_register_composite(dev, cfg->name, cfg->parent_names,
cfg->num_parents, base, cfg->cfg,
cfg->flags, lock);
}
#define GATE(_id, _name, _parent, _flags, _offset, _bit_idx, _gate_flags)\
{\
.id = _id,\
.name = _name,\
.parent_name = _parent,\
.flags = _flags,\
.cfg = &(struct gate_cfg) {\
.reg_off = _offset,\
.bit_idx = _bit_idx,\
.gate_flags = _gate_flags,\
},\
.func = _clk_hw_register_gate,\
}
#define FIXED_FACTOR(_id, _name, _parent, _flags, _mult, _div)\
{\
.id = _id,\
.name = _name,\
.parent_name = _parent,\
.flags = _flags,\
.cfg = &(struct fixed_factor_cfg) {\
.mult = _mult,\
.div = _div,\
},\
.func = _clk_hw_register_fixed_factor,\
}
#define DIV_TABLE(_id, _name, _parent, _flags, _offset, _shift, _width,\
_div_flags, _div_table)\
{\
.id = _id,\
.name = _name,\
.parent_name = _parent,\
.flags = _flags,\
.cfg = &(struct div_cfg) {\
.reg_off = _offset,\
.shift = _shift,\
.width = _width,\
.div_flags = _div_flags,\
.table = _div_table,\
},\
.func = _clk_hw_register_divider_table,\
}
#define DIV(_id, _name, _parent, _flags, _offset, _shift, _width, _div_flags)\
DIV_TABLE(_id, _name, _parent, _flags, _offset, _shift, _width,\
_div_flags, NULL)
#define MUX(_id, _name, _parents, _flags, _offset, _shift, _width, _mux_flags)\
{\
.id = _id,\
.name = _name,\
.parent_names = _parents,\
.num_parents = ARRAY_SIZE(_parents),\
.flags = _flags,\
.cfg = &(struct mux_cfg) {\
.reg_off = _offset,\
.shift = _shift,\
.width = _width,\
.mux_flags = _mux_flags,\
},\
.func = _clk_hw_register_mux,\
}
#define PLL(_id, _name, _parents, _flags, _offset_p, _offset_mux)\
{\
.id = _id,\
.name = _name,\
.parent_names = _parents,\
.num_parents = ARRAY_SIZE(_parents),\
.flags = CLK_IGNORE_UNUSED | (_flags),\
.cfg = &(struct stm32_pll_cfg) {\
.offset = _offset_p,\
.muxoff = _offset_mux,\
},\
.func = _clk_register_pll,\
}
#define STM32_CKTIM(_name, _parent, _flags, _offset_apbdiv, _offset_timpre)\
{\
.id = NO_ID,\
.name = _name,\
.parent_name = _parent,\
.flags = _flags,\
.cfg = &(struct stm32_cktim_cfg) {\
.offset_apbdiv = _offset_apbdiv,\
.offset_timpre = _offset_timpre,\
},\
.func = _clk_register_cktim,\
}
#define STM32_TIM(_id, _name, _parent, _offset_set, _bit_idx)\
GATE_MP1(_id, _name, _parent, CLK_SET_RATE_PARENT,\
_offset_set, _bit_idx, 0)
/* STM32 GATE */
#define STM32_GATE(_id, _name, _parent, _flags, _gate)\
{\
.id = _id,\
.name = _name,\
.parent_name = _parent,\
.flags = _flags,\
.cfg = (struct stm32_gate_cfg *) {_gate},\
.func = _clk_stm32_register_gate,\
}
#define _STM32_GATE(_gate_offset, _gate_bit_idx, _gate_flags, _mgate, _ops)\
(&(struct stm32_gate_cfg) {\
&(struct gate_cfg) {\
.reg_off = _gate_offset,\
.bit_idx = _gate_bit_idx,\
.gate_flags = _gate_flags,\
},\
.mgate = _mgate,\
.ops = _ops,\
})
#define _STM32_MGATE(_mgate)\
(&per_gate_cfg[_mgate])
#define _GATE(_gate_offset, _gate_bit_idx, _gate_flags)\
_STM32_GATE(_gate_offset, _gate_bit_idx, _gate_flags,\
NULL, NULL)\
#define _GATE_MP1(_gate_offset, _gate_bit_idx, _gate_flags)\
_STM32_GATE(_gate_offset, _gate_bit_idx, _gate_flags,\
NULL, &mp1_gate_clk_ops)\
#define _MGATE_MP1(_mgate)\
.gate = &per_gate_cfg[_mgate]
#define GATE_MP1(_id, _name, _parent, _flags, _offset, _bit_idx, _gate_flags)\
STM32_GATE(_id, _name, _parent, _flags,\
_GATE_MP1(_offset, _bit_idx, _gate_flags))
#define MGATE_MP1(_id, _name, _parent, _flags, _mgate)\
STM32_GATE(_id, _name, _parent, _flags,\
_STM32_MGATE(_mgate))
#define _STM32_DIV(_div_offset, _div_shift, _div_width,\
_div_flags, _div_table, _ops)\
.div = &(struct stm32_div_cfg) {\
&(struct div_cfg) {\
.reg_off = _div_offset,\
.shift = _div_shift,\
.width = _div_width,\
.div_flags = _div_flags,\
.table = _div_table,\
},\
.ops = _ops,\
}
#define _DIV(_div_offset, _div_shift, _div_width, _div_flags, _div_table)\
_STM32_DIV(_div_offset, _div_shift, _div_width,\
_div_flags, _div_table, NULL)\
#define _DIV_RTC(_div_offset, _div_shift, _div_width, _div_flags, _div_table)\
_STM32_DIV(_div_offset, _div_shift, _div_width,\
_div_flags, _div_table, &rtc_div_clk_ops)
#define _STM32_MUX(_offset, _shift, _width, _mux_flags, _mmux, _ops)\
.mux = &(struct stm32_mux_cfg) {\
&(struct mux_cfg) {\
.reg_off = _offset,\
.shift = _shift,\
.width = _width,\
.mux_flags = _mux_flags,\
.table = NULL,\
},\
.mmux = _mmux,\
.ops = _ops,\
}
#define _MUX(_offset, _shift, _width, _mux_flags)\
_STM32_MUX(_offset, _shift, _width, _mux_flags, NULL, NULL)\
#define _MMUX(_mmux) .mux = &ker_mux_cfg[_mmux]
#define PARENT(_parent) ((const char *[]) { _parent})
#define _NO_MUX .mux = NULL
#define _NO_DIV .div = NULL
#define _NO_GATE .gate = NULL
#define COMPOSITE(_id, _name, _parents, _flags, _gate, _mux, _div)\
{\
.id = _id,\
.name = _name,\
.parent_names = _parents,\
.num_parents = ARRAY_SIZE(_parents),\
.flags = _flags,\
.cfg = &(struct stm32_composite_cfg) {\
_gate,\
_mux,\
_div,\
},\
.func = _clk_stm32_register_composite,\
}
#define PCLK(_id, _name, _parent, _flags, _mgate)\
MGATE_MP1(_id, _name, _parent, _flags, _mgate)
#define KCLK(_id, _name, _parents, _flags, _mgate, _mmux)\
COMPOSITE(_id, _name, _parents, CLK_OPS_PARENT_ENABLE |\
CLK_SET_RATE_NO_REPARENT | _flags,\
_MGATE_MP1(_mgate),\
_MMUX(_mmux),\
_NO_DIV)
enum {
G_SAI1,
G_SAI2,
G_SAI3,
G_SAI4,
G_SPI1,
G_SPI2,
G_SPI3,
G_SPI4,
G_SPI5,
G_SPI6,
G_SPDIF,
G_I2C1,
G_I2C2,
G_I2C3,
G_I2C4,
G_I2C5,
G_I2C6,
G_USART2,
G_UART4,
G_USART3,
G_UART5,
G_USART1,
G_USART6,
G_UART7,
G_UART8,
G_LPTIM1,
G_LPTIM2,
G_LPTIM3,
G_LPTIM4,
G_LPTIM5,
G_LTDC,
G_DSI,
G_QSPI,
G_FMC,
G_SDMMC1,
G_SDMMC2,
G_SDMMC3,
G_USBO,
G_USBPHY,
G_RNG1,
G_RNG2,
G_FDCAN,
G_DAC12,
G_CEC,
G_ADC12,
G_GPU,
G_STGEN,
G_DFSDM,
G_ADFSDM,
G_TIM2,
G_TIM3,
G_TIM4,
G_TIM5,
G_TIM6,
G_TIM7,
G_TIM12,
G_TIM13,
G_TIM14,
G_MDIO,
G_TIM1,
G_TIM8,
G_TIM15,
G_TIM16,
G_TIM17,
G_SYSCFG,
G_VREF,
G_TMPSENS,
G_PMBCTRL,
G_HDP,
G_IWDG2,
G_STGENRO,
G_DMA1,
G_DMA2,
G_DMAMUX,
G_DCMI,
G_CRYP2,
G_HASH2,
G_CRC2,
G_HSEM,
G_IPCC,
G_GPIOA,
G_GPIOB,
G_GPIOC,
G_GPIOD,
G_GPIOE,
G_GPIOF,
G_GPIOG,
G_GPIOH,
G_GPIOI,
G_GPIOJ,
G_GPIOK,
G_MDMA,
G_ETHCK,
G_ETHTX,
G_ETHRX,
G_ETHMAC,
G_CRC1,
G_USBH,
G_ETHSTP,
G_RTCAPB,
G_TZC1,
G_TZC2,
G_TZPC,
G_IWDG1,
G_BSEC,
G_GPIOZ,
G_CRYP1,
G_HASH1,
G_BKPSRAM,
G_DDRPERFM,
G_LAST
};
static struct stm32_mgate mp1_mgate[G_LAST];
#define _K_GATE(_id, _gate_offset, _gate_bit_idx, _gate_flags,\
_mgate, _ops)\
[_id] = {\
&(struct gate_cfg) {\
.reg_off = _gate_offset,\
.bit_idx = _gate_bit_idx,\
.gate_flags = _gate_flags,\
},\
.mgate = _mgate,\
.ops = _ops,\
}
#define K_GATE(_id, _gate_offset, _gate_bit_idx, _gate_flags)\
_K_GATE(_id, _gate_offset, _gate_bit_idx, _gate_flags,\
NULL, &mp1_gate_clk_ops)
#define K_MGATE(_id, _gate_offset, _gate_bit_idx, _gate_flags)\
_K_GATE(_id, _gate_offset, _gate_bit_idx, _gate_flags,\
&mp1_mgate[_id], &mp1_mgate_clk_ops)
/* Peripheral gates */
static struct stm32_gate_cfg per_gate_cfg[G_LAST] = {
/* Multi gates */
K_GATE(G_MDIO, RCC_APB1ENSETR, 31, 0),
K_MGATE(G_DAC12, RCC_APB1ENSETR, 29, 0),
K_MGATE(G_CEC, RCC_APB1ENSETR, 27, 0),
K_MGATE(G_SPDIF, RCC_APB1ENSETR, 26, 0),
K_MGATE(G_I2C5, RCC_APB1ENSETR, 24, 0),
K_MGATE(G_I2C3, RCC_APB1ENSETR, 23, 0),
K_MGATE(G_I2C2, RCC_APB1ENSETR, 22, 0),
K_MGATE(G_I2C1, RCC_APB1ENSETR, 21, 0),
K_MGATE(G_UART8, RCC_APB1ENSETR, 19, 0),
K_MGATE(G_UART7, RCC_APB1ENSETR, 18, 0),
K_MGATE(G_UART5, RCC_APB1ENSETR, 17, 0),
K_MGATE(G_UART4, RCC_APB1ENSETR, 16, 0),
K_MGATE(G_USART3, RCC_APB1ENSETR, 15, 0),
K_MGATE(G_USART2, RCC_APB1ENSETR, 14, 0),
K_MGATE(G_SPI3, RCC_APB1ENSETR, 12, 0),
K_MGATE(G_SPI2, RCC_APB1ENSETR, 11, 0),
K_MGATE(G_LPTIM1, RCC_APB1ENSETR, 9, 0),
K_GATE(G_TIM14, RCC_APB1ENSETR, 8, 0),
K_GATE(G_TIM13, RCC_APB1ENSETR, 7, 0),
K_GATE(G_TIM12, RCC_APB1ENSETR, 6, 0),
K_GATE(G_TIM7, RCC_APB1ENSETR, 5, 0),
K_GATE(G_TIM6, RCC_APB1ENSETR, 4, 0),
K_GATE(G_TIM5, RCC_APB1ENSETR, 3, 0),
K_GATE(G_TIM4, RCC_APB1ENSETR, 2, 0),
K_GATE(G_TIM3, RCC_APB1ENSETR, 1, 0),
K_GATE(G_TIM2, RCC_APB1ENSETR, 0, 0),
K_MGATE(G_FDCAN, RCC_APB2ENSETR, 24, 0),
K_GATE(G_ADFSDM, RCC_APB2ENSETR, 21, 0),
K_GATE(G_DFSDM, RCC_APB2ENSETR, 20, 0),
K_MGATE(G_SAI3, RCC_APB2ENSETR, 18, 0),
K_MGATE(G_SAI2, RCC_APB2ENSETR, 17, 0),
K_MGATE(G_SAI1, RCC_APB2ENSETR, 16, 0),
K_MGATE(G_USART6, RCC_APB2ENSETR, 13, 0),
K_MGATE(G_SPI5, RCC_APB2ENSETR, 10, 0),
K_MGATE(G_SPI4, RCC_APB2ENSETR, 9, 0),
K_MGATE(G_SPI1, RCC_APB2ENSETR, 8, 0),
K_GATE(G_TIM17, RCC_APB2ENSETR, 4, 0),
K_GATE(G_TIM16, RCC_APB2ENSETR, 3, 0),
K_GATE(G_TIM15, RCC_APB2ENSETR, 2, 0),
K_GATE(G_TIM8, RCC_APB2ENSETR, 1, 0),
K_GATE(G_TIM1, RCC_APB2ENSETR, 0, 0),
K_GATE(G_HDP, RCC_APB3ENSETR, 20, 0),
K_GATE(G_PMBCTRL, RCC_APB3ENSETR, 17, 0),
K_GATE(G_TMPSENS, RCC_APB3ENSETR, 16, 0),
K_GATE(G_VREF, RCC_APB3ENSETR, 13, 0),
K_GATE(G_SYSCFG, RCC_APB3ENSETR, 11, 0),
K_MGATE(G_SAI4, RCC_APB3ENSETR, 8, 0),
K_MGATE(G_LPTIM5, RCC_APB3ENSETR, 3, 0),
K_MGATE(G_LPTIM4, RCC_APB3ENSETR, 2, 0),
K_MGATE(G_LPTIM3, RCC_APB3ENSETR, 1, 0),
K_MGATE(G_LPTIM2, RCC_APB3ENSETR, 0, 0),
K_GATE(G_STGENRO, RCC_APB4ENSETR, 20, 0),
K_MGATE(G_USBPHY, RCC_APB4ENSETR, 16, 0),
K_GATE(G_IWDG2, RCC_APB4ENSETR, 15, 0),
K_GATE(G_DDRPERFM, RCC_APB4ENSETR, 8, 0),
K_MGATE(G_DSI, RCC_APB4ENSETR, 4, 0),
K_MGATE(G_LTDC, RCC_APB4ENSETR, 0, 0),
K_GATE(G_STGEN, RCC_APB5ENSETR, 20, 0),
K_GATE(G_BSEC, RCC_APB5ENSETR, 16, 0),
K_GATE(G_IWDG1, RCC_APB5ENSETR, 15, 0),
K_GATE(G_TZPC, RCC_APB5ENSETR, 13, 0),
K_GATE(G_TZC2, RCC_APB5ENSETR, 12, 0),
K_GATE(G_TZC1, RCC_APB5ENSETR, 11, 0),
K_GATE(G_RTCAPB, RCC_APB5ENSETR, 8, 0),
K_MGATE(G_USART1, RCC_APB5ENSETR, 4, 0),
K_MGATE(G_I2C6, RCC_APB5ENSETR, 3, 0),
K_MGATE(G_I2C4, RCC_APB5ENSETR, 2, 0),
K_MGATE(G_SPI6, RCC_APB5ENSETR, 0, 0),
K_MGATE(G_SDMMC3, RCC_AHB2ENSETR, 16, 0),
K_MGATE(G_USBO, RCC_AHB2ENSETR, 8, 0),
K_MGATE(G_ADC12, RCC_AHB2ENSETR, 5, 0),
K_GATE(G_DMAMUX, RCC_AHB2ENSETR, 2, 0),
K_GATE(G_DMA2, RCC_AHB2ENSETR, 1, 0),
K_GATE(G_DMA1, RCC_AHB2ENSETR, 0, 0),
K_GATE(G_IPCC, RCC_AHB3ENSETR, 12, 0),
K_GATE(G_HSEM, RCC_AHB3ENSETR, 11, 0),
K_GATE(G_CRC2, RCC_AHB3ENSETR, 7, 0),
K_MGATE(G_RNG2, RCC_AHB3ENSETR, 6, 0),
K_GATE(G_HASH2, RCC_AHB3ENSETR, 5, 0),
K_GATE(G_CRYP2, RCC_AHB3ENSETR, 4, 0),
K_GATE(G_DCMI, RCC_AHB3ENSETR, 0, 0),
K_GATE(G_GPIOK, RCC_AHB4ENSETR, 10, 0),
K_GATE(G_GPIOJ, RCC_AHB4ENSETR, 9, 0),
K_GATE(G_GPIOI, RCC_AHB4ENSETR, 8, 0),
K_GATE(G_GPIOH, RCC_AHB4ENSETR, 7, 0),
K_GATE(G_GPIOG, RCC_AHB4ENSETR, 6, 0),
K_GATE(G_GPIOF, RCC_AHB4ENSETR, 5, 0),
K_GATE(G_GPIOE, RCC_AHB4ENSETR, 4, 0),
K_GATE(G_GPIOD, RCC_AHB4ENSETR, 3, 0),
K_GATE(G_GPIOC, RCC_AHB4ENSETR, 2, 0),
K_GATE(G_GPIOB, RCC_AHB4ENSETR, 1, 0),
K_GATE(G_GPIOA, RCC_AHB4ENSETR, 0, 0),
K_GATE(G_BKPSRAM, RCC_AHB5ENSETR, 8, 0),
K_MGATE(G_RNG1, RCC_AHB5ENSETR, 6, 0),
K_GATE(G_HASH1, RCC_AHB5ENSETR, 5, 0),
K_GATE(G_CRYP1, RCC_AHB5ENSETR, 4, 0),
K_GATE(G_GPIOZ, RCC_AHB5ENSETR, 0, 0),
K_GATE(G_USBH, RCC_AHB6ENSETR, 24, 0),
K_GATE(G_CRC1, RCC_AHB6ENSETR, 20, 0),
K_MGATE(G_SDMMC2, RCC_AHB6ENSETR, 17, 0),
K_MGATE(G_SDMMC1, RCC_AHB6ENSETR, 16, 0),
K_MGATE(G_QSPI, RCC_AHB6ENSETR, 14, 0),
K_MGATE(G_FMC, RCC_AHB6ENSETR, 12, 0),
K_GATE(G_ETHMAC, RCC_AHB6ENSETR, 10, 0),
K_GATE(G_ETHRX, RCC_AHB6ENSETR, 9, 0),
K_GATE(G_ETHTX, RCC_AHB6ENSETR, 8, 0),
K_GATE(G_ETHCK, RCC_AHB6ENSETR, 7, 0),
K_MGATE(G_GPU, RCC_AHB6ENSETR, 5, 0),
K_GATE(G_MDMA, RCC_AHB6ENSETR, 0, 0),
K_GATE(G_ETHSTP, RCC_AHB6LPENSETR, 11, 0),
};
enum {
M_SDMMC12,
M_SDMMC3,
M_FMC,
M_QSPI,
M_RNG1,
M_RNG2,
M_USBPHY,
M_USBO,
M_STGEN,
M_SPDIF,
M_SPI1,
M_SPI23,
M_SPI45,
M_SPI6,
M_CEC,
M_I2C12,
M_I2C35,
M_I2C46,
M_LPTIM1,
M_LPTIM23,
M_LPTIM45,
M_USART1,
M_UART24,
M_UART35,
M_USART6,
M_UART78,
M_SAI1,
M_SAI2,
M_SAI3,
M_SAI4,
M_DSI,
M_FDCAN,
M_ADC12,
M_ETHCK,
M_CKPER,
M_LAST
};
static struct stm32_mmux ker_mux[M_LAST];
#define _K_MUX(_id, _offset, _shift, _width, _mux_flags, _mmux, _ops)\
[_id] = {\
&(struct mux_cfg) {\
.reg_off = _offset,\
.shift = _shift,\
.width = _width,\
.mux_flags = _mux_flags,\
.table = NULL,\
},\
.mmux = _mmux,\
.ops = _ops,\
}
#define K_MUX(_id, _offset, _shift, _width, _mux_flags)\
_K_MUX(_id, _offset, _shift, _width, _mux_flags,\
NULL, NULL)
#define K_MMUX(_id, _offset, _shift, _width, _mux_flags)\
_K_MUX(_id, _offset, _shift, _width, _mux_flags,\
&ker_mux[_id], &clk_mmux_ops)
static const struct stm32_mux_cfg ker_mux_cfg[M_LAST] = {
/* Kernel multi mux */
K_MMUX(M_SDMMC12, RCC_SDMMC12CKSELR, 0, 3, 0),
K_MMUX(M_SPI23, RCC_SPI2S23CKSELR, 0, 3, 0),
K_MMUX(M_SPI45, RCC_SPI2S45CKSELR, 0, 3, 0),
K_MMUX(M_I2C12, RCC_I2C12CKSELR, 0, 3, 0),
K_MMUX(M_I2C35, RCC_I2C35CKSELR, 0, 3, 0),
K_MMUX(M_LPTIM23, RCC_LPTIM23CKSELR, 0, 3, 0),
K_MMUX(M_LPTIM45, RCC_LPTIM45CKSELR, 0, 3, 0),
K_MMUX(M_UART24, RCC_UART24CKSELR, 0, 3, 0),
K_MMUX(M_UART35, RCC_UART35CKSELR, 0, 3, 0),
K_MMUX(M_UART78, RCC_UART78CKSELR, 0, 3, 0),
K_MMUX(M_SAI1, RCC_SAI1CKSELR, 0, 3, 0),
K_MMUX(M_ETHCK, RCC_ETHCKSELR, 0, 2, 0),
K_MMUX(M_I2C46, RCC_I2C46CKSELR, 0, 3, 0),
/* Kernel simple mux */
K_MUX(M_RNG2, RCC_RNG2CKSELR, 0, 2, 0),
K_MUX(M_SDMMC3, RCC_SDMMC3CKSELR, 0, 3, 0),
K_MUX(M_FMC, RCC_FMCCKSELR, 0, 2, 0),
K_MUX(M_QSPI, RCC_QSPICKSELR, 0, 2, 0),
K_MUX(M_USBPHY, RCC_USBCKSELR, 0, 2, 0),
K_MUX(M_USBO, RCC_USBCKSELR, 4, 1, 0),
K_MUX(M_SPDIF, RCC_SPDIFCKSELR, 0, 2, 0),
K_MUX(M_SPI1, RCC_SPI2S1CKSELR, 0, 3, 0),
K_MUX(M_CEC, RCC_CECCKSELR, 0, 2, 0),
K_MUX(M_LPTIM1, RCC_LPTIM1CKSELR, 0, 3, 0),
K_MUX(M_USART6, RCC_UART6CKSELR, 0, 3, 0),
K_MUX(M_FDCAN, RCC_FDCANCKSELR, 0, 2, 0),
K_MUX(M_SAI2, RCC_SAI2CKSELR, 0, 3, 0),
K_MUX(M_SAI3, RCC_SAI3CKSELR, 0, 3, 0),
K_MUX(M_SAI4, RCC_SAI4CKSELR, 0, 3, 0),
K_MUX(M_ADC12, RCC_ADCCKSELR, 0, 2, 0),
K_MUX(M_DSI, RCC_DSICKSELR, 0, 1, 0),
K_MUX(M_CKPER, RCC_CPERCKSELR, 0, 2, 0),
K_MUX(M_RNG1, RCC_RNG1CKSELR, 0, 2, 0),
K_MUX(M_STGEN, RCC_STGENCKSELR, 0, 2, 0),
K_MUX(M_USART1, RCC_UART1CKSELR, 0, 3, 0),
K_MUX(M_SPI6, RCC_SPI6CKSELR, 0, 3, 0),
};
static const struct clock_config stm32mp1_clock_cfg[] = {
/* External / Internal Oscillators */
GATE_MP1(CK_HSE, "ck_hse", "clk-hse", 0, RCC_OCENSETR, 8, 0),
/* ck_csi is used by IO compensation and should be critical */
GATE_MP1(CK_CSI, "ck_csi", "clk-csi", CLK_IS_CRITICAL,
RCC_OCENSETR, 4, 0),
COMPOSITE(CK_HSI, "ck_hsi", PARENT("clk-hsi"), 0,
_GATE_MP1(RCC_OCENSETR, 0, 0),
_NO_MUX,
_DIV(RCC_HSICFGR, 0, 2, CLK_DIVIDER_POWER_OF_TWO |
CLK_DIVIDER_READ_ONLY, NULL)),
GATE(CK_LSI, "ck_lsi", "clk-lsi", 0, RCC_RDLSICR, 0, 0),
GATE(CK_LSE, "ck_lse", "clk-lse", 0, RCC_BDCR, 0, 0),
FIXED_FACTOR(CK_HSE_DIV2, "clk-hse-div2", "ck_hse", 0, 1, 2),
/* PLLs */
PLL(PLL1, "pll1", ref12_parents, 0, RCC_PLL1CR, RCC_RCK12SELR),
PLL(PLL2, "pll2", ref12_parents, 0, RCC_PLL2CR, RCC_RCK12SELR),
PLL(PLL3, "pll3", ref3_parents, 0, RCC_PLL3CR, RCC_RCK3SELR),
PLL(PLL4, "pll4", ref4_parents, 0, RCC_PLL4CR, RCC_RCK4SELR),
/* ODF */
COMPOSITE(PLL1_P, "pll1_p", PARENT("pll1"), 0,
_GATE(RCC_PLL1CR, 4, 0),
_NO_MUX,
_DIV(RCC_PLL1CFGR2, 0, 7, 0, NULL)),
COMPOSITE(PLL2_P, "pll2_p", PARENT("pll2"), 0,
_GATE(RCC_PLL2CR, 4, 0),
_NO_MUX,
_DIV(RCC_PLL2CFGR2, 0, 7, 0, NULL)),
COMPOSITE(PLL2_Q, "pll2_q", PARENT("pll2"), 0,
_GATE(RCC_PLL2CR, 5, 0),
_NO_MUX,
_DIV(RCC_PLL2CFGR2, 8, 7, 0, NULL)),
COMPOSITE(PLL2_R, "pll2_r", PARENT("pll2"), CLK_IS_CRITICAL,
_GATE(RCC_PLL2CR, 6, 0),
_NO_MUX,
_DIV(RCC_PLL2CFGR2, 16, 7, 0, NULL)),
COMPOSITE(PLL3_P, "pll3_p", PARENT("pll3"), 0,
_GATE(RCC_PLL3CR, 4, 0),
_NO_MUX,
_DIV(RCC_PLL3CFGR2, 0, 7, 0, NULL)),
COMPOSITE(PLL3_Q, "pll3_q", PARENT("pll3"), 0,
_GATE(RCC_PLL3CR, 5, 0),
_NO_MUX,
_DIV(RCC_PLL3CFGR2, 8, 7, 0, NULL)),
COMPOSITE(PLL3_R, "pll3_r", PARENT("pll3"), 0,
_GATE(RCC_PLL3CR, 6, 0),
_NO_MUX,
_DIV(RCC_PLL3CFGR2, 16, 7, 0, NULL)),
COMPOSITE(PLL4_P, "pll4_p", PARENT("pll4"), 0,
_GATE(RCC_PLL4CR, 4, 0),
_NO_MUX,
_DIV(RCC_PLL4CFGR2, 0, 7, 0, NULL)),
COMPOSITE(PLL4_Q, "pll4_q", PARENT("pll4"), 0,
_GATE(RCC_PLL4CR, 5, 0),
_NO_MUX,
_DIV(RCC_PLL4CFGR2, 8, 7, 0, NULL)),
COMPOSITE(PLL4_R, "pll4_r", PARENT("pll4"), 0,
_GATE(RCC_PLL4CR, 6, 0),
_NO_MUX,
_DIV(RCC_PLL4CFGR2, 16, 7, 0, NULL)),
/* MUX system clocks */
MUX(CK_PER, "ck_per", per_src, CLK_OPS_PARENT_ENABLE,
RCC_CPERCKSELR, 0, 2, 0),
MUX(CK_MPU, "ck_mpu", cpu_src, CLK_OPS_PARENT_ENABLE |
CLK_IS_CRITICAL, RCC_MPCKSELR, 0, 2, 0),
COMPOSITE(CK_AXI, "ck_axi", axi_src, CLK_IS_CRITICAL |
CLK_OPS_PARENT_ENABLE,
_NO_GATE,
_MUX(RCC_ASSCKSELR, 0, 2, 0),
_DIV(RCC_AXIDIVR, 0, 3, 0, axi_div_table)),
COMPOSITE(CK_MCU, "ck_mcu", mcu_src, CLK_IS_CRITICAL |
CLK_OPS_PARENT_ENABLE,
_NO_GATE,
_MUX(RCC_MSSCKSELR, 0, 2, 0),
_DIV(RCC_MCUDIVR, 0, 4, 0, mcu_div_table)),
DIV_TABLE(NO_ID, "pclk1", "ck_mcu", CLK_IGNORE_UNUSED, RCC_APB1DIVR, 0,
3, CLK_DIVIDER_READ_ONLY, apb_div_table),
DIV_TABLE(NO_ID, "pclk2", "ck_mcu", CLK_IGNORE_UNUSED, RCC_APB2DIVR, 0,
3, CLK_DIVIDER_READ_ONLY, apb_div_table),
DIV_TABLE(NO_ID, "pclk3", "ck_mcu", CLK_IGNORE_UNUSED, RCC_APB3DIVR, 0,
3, CLK_DIVIDER_READ_ONLY, apb_div_table),
DIV_TABLE(NO_ID, "pclk4", "ck_axi", CLK_IGNORE_UNUSED, RCC_APB4DIVR, 0,
3, CLK_DIVIDER_READ_ONLY, apb_div_table),
DIV_TABLE(NO_ID, "pclk5", "ck_axi", CLK_IGNORE_UNUSED, RCC_APB5DIVR, 0,
3, CLK_DIVIDER_READ_ONLY, apb_div_table),
/* Kernel Timers */
STM32_CKTIM("ck1_tim", "pclk1", 0, RCC_APB1DIVR, RCC_TIMG1PRER),
STM32_CKTIM("ck2_tim", "pclk2", 0, RCC_APB2DIVR, RCC_TIMG2PRER),
STM32_TIM(TIM2_K, "tim2_k", "ck1_tim", RCC_APB1ENSETR, 0),
STM32_TIM(TIM3_K, "tim3_k", "ck1_tim", RCC_APB1ENSETR, 1),
STM32_TIM(TIM4_K, "tim4_k", "ck1_tim", RCC_APB1ENSETR, 2),
STM32_TIM(TIM5_K, "tim5_k", "ck1_tim", RCC_APB1ENSETR, 3),
STM32_TIM(TIM6_K, "tim6_k", "ck1_tim", RCC_APB1ENSETR, 4),
STM32_TIM(TIM7_K, "tim7_k", "ck1_tim", RCC_APB1ENSETR, 5),
STM32_TIM(TIM12_K, "tim12_k", "ck1_tim", RCC_APB1ENSETR, 6),
STM32_TIM(TIM13_K, "tim13_k", "ck1_tim", RCC_APB1ENSETR, 7),
STM32_TIM(TIM14_K, "tim14_k", "ck1_tim", RCC_APB1ENSETR, 8),
STM32_TIM(TIM1_K, "tim1_k", "ck2_tim", RCC_APB2ENSETR, 0),
STM32_TIM(TIM8_K, "tim8_k", "ck2_tim", RCC_APB2ENSETR, 1),
STM32_TIM(TIM15_K, "tim15_k", "ck2_tim", RCC_APB2ENSETR, 2),
STM32_TIM(TIM16_K, "tim16_k", "ck2_tim", RCC_APB2ENSETR, 3),
STM32_TIM(TIM17_K, "tim17_k", "ck2_tim", RCC_APB2ENSETR, 4),
/* Peripheral clocks */
PCLK(TIM2, "tim2", "pclk1", CLK_IGNORE_UNUSED, G_TIM2),
PCLK(TIM3, "tim3", "pclk1", CLK_IGNORE_UNUSED, G_TIM3),
PCLK(TIM4, "tim4", "pclk1", CLK_IGNORE_UNUSED, G_TIM4),
PCLK(TIM5, "tim5", "pclk1", CLK_IGNORE_UNUSED, G_TIM5),
PCLK(TIM6, "tim6", "pclk1", CLK_IGNORE_UNUSED, G_TIM6),
PCLK(TIM7, "tim7", "pclk1", CLK_IGNORE_UNUSED, G_TIM7),
PCLK(TIM12, "tim12", "pclk1", CLK_IGNORE_UNUSED, G_TIM12),
PCLK(TIM13, "tim13", "pclk1", CLK_IGNORE_UNUSED, G_TIM13),
PCLK(TIM14, "tim14", "pclk1", CLK_IGNORE_UNUSED, G_TIM14),
PCLK(LPTIM1, "lptim1", "pclk1", 0, G_LPTIM1),
PCLK(SPI2, "spi2", "pclk1", 0, G_SPI2),
PCLK(SPI3, "spi3", "pclk1", 0, G_SPI3),
PCLK(USART2, "usart2", "pclk1", 0, G_USART2),
PCLK(USART3, "usart3", "pclk1", 0, G_USART3),
PCLK(UART4, "uart4", "pclk1", 0, G_UART4),
PCLK(UART5, "uart5", "pclk1", 0, G_UART5),
PCLK(UART7, "uart7", "pclk1", 0, G_UART7),
PCLK(UART8, "uart8", "pclk1", 0, G_UART8),
PCLK(I2C1, "i2c1", "pclk1", 0, G_I2C1),
PCLK(I2C2, "i2c2", "pclk1", 0, G_I2C2),
PCLK(I2C3, "i2c3", "pclk1", 0, G_I2C3),
PCLK(I2C5, "i2c5", "pclk1", 0, G_I2C5),
PCLK(SPDIF, "spdif", "pclk1", 0, G_SPDIF),
PCLK(CEC, "cec", "pclk1", 0, G_CEC),
PCLK(DAC12, "dac12", "pclk1", 0, G_DAC12),
PCLK(MDIO, "mdio", "pclk1", 0, G_MDIO),
PCLK(TIM1, "tim1", "pclk2", CLK_IGNORE_UNUSED, G_TIM1),
PCLK(TIM8, "tim8", "pclk2", CLK_IGNORE_UNUSED, G_TIM8),
PCLK(TIM15, "tim15", "pclk2", CLK_IGNORE_UNUSED, G_TIM15),
PCLK(TIM16, "tim16", "pclk2", CLK_IGNORE_UNUSED, G_TIM16),
PCLK(TIM17, "tim17", "pclk2", CLK_IGNORE_UNUSED, G_TIM17),
PCLK(SPI1, "spi1", "pclk2", 0, G_SPI1),
PCLK(SPI4, "spi4", "pclk2", 0, G_SPI4),
PCLK(SPI5, "spi5", "pclk2", 0, G_SPI5),
PCLK(USART6, "usart6", "pclk2", 0, G_USART6),
PCLK(SAI1, "sai1", "pclk2", 0, G_SAI1),
PCLK(SAI2, "sai2", "pclk2", 0, G_SAI2),
PCLK(SAI3, "sai3", "pclk2", 0, G_SAI3),
PCLK(DFSDM, "dfsdm", "pclk2", 0, G_DFSDM),
PCLK(FDCAN, "fdcan", "pclk2", 0, G_FDCAN),
PCLK(LPTIM2, "lptim2", "pclk3", 0, G_LPTIM2),
PCLK(LPTIM3, "lptim3", "pclk3", 0, G_LPTIM3),
PCLK(LPTIM4, "lptim4", "pclk3", 0, G_LPTIM4),
PCLK(LPTIM5, "lptim5", "pclk3", 0, G_LPTIM5),
PCLK(SAI4, "sai4", "pclk3", 0, G_SAI4),
PCLK(SYSCFG, "syscfg", "pclk3", 0, G_SYSCFG),
PCLK(VREF, "vref", "pclk3", 13, G_VREF),
PCLK(TMPSENS, "tmpsens", "pclk3", 0, G_TMPSENS),
PCLK(PMBCTRL, "pmbctrl", "pclk3", 0, G_PMBCTRL),
PCLK(HDP, "hdp", "pclk3", 0, G_HDP),
PCLK(LTDC, "ltdc", "pclk4", 0, G_LTDC),
PCLK(DSI, "dsi", "pclk4", 0, G_DSI),
PCLK(IWDG2, "iwdg2", "pclk4", 0, G_IWDG2),
PCLK(USBPHY, "usbphy", "pclk4", 0, G_USBPHY),
PCLK(STGENRO, "stgenro", "pclk4", 0, G_STGENRO),
PCLK(SPI6, "spi6", "pclk5", 0, G_SPI6),
PCLK(I2C4, "i2c4", "pclk5", 0, G_I2C4),
PCLK(I2C6, "i2c6", "pclk5", 0, G_I2C6),
PCLK(USART1, "usart1", "pclk5", 0, G_USART1),
PCLK(RTCAPB, "rtcapb", "pclk5", CLK_IGNORE_UNUSED |
CLK_IS_CRITICAL, G_RTCAPB),
PCLK(TZC1, "tzc1", "ck_axi", CLK_IGNORE_UNUSED, G_TZC1),
PCLK(TZC2, "tzc2", "ck_axi", CLK_IGNORE_UNUSED, G_TZC2),
PCLK(TZPC, "tzpc", "pclk5", CLK_IGNORE_UNUSED, G_TZPC),
PCLK(IWDG1, "iwdg1", "pclk5", 0, G_IWDG1),
PCLK(BSEC, "bsec", "pclk5", CLK_IGNORE_UNUSED, G_BSEC),
PCLK(STGEN, "stgen", "pclk5", CLK_IGNORE_UNUSED, G_STGEN),
PCLK(DMA1, "dma1", "ck_mcu", 0, G_DMA1),
PCLK(DMA2, "dma2", "ck_mcu", 0, G_DMA2),
PCLK(DMAMUX, "dmamux", "ck_mcu", 0, G_DMAMUX),
PCLK(ADC12, "adc12", "ck_mcu", 0, G_ADC12),
PCLK(USBO, "usbo", "ck_mcu", 0, G_USBO),
PCLK(SDMMC3, "sdmmc3", "ck_mcu", 0, G_SDMMC3),
PCLK(DCMI, "dcmi", "ck_mcu", 0, G_DCMI),
PCLK(CRYP2, "cryp2", "ck_mcu", 0, G_CRYP2),
PCLK(HASH2, "hash2", "ck_mcu", 0, G_HASH2),
PCLK(RNG2, "rng2", "ck_mcu", 0, G_RNG2),
PCLK(CRC2, "crc2", "ck_mcu", 0, G_CRC2),
PCLK(HSEM, "hsem", "ck_mcu", 0, G_HSEM),
PCLK(IPCC, "ipcc", "ck_mcu", 0, G_IPCC),
PCLK(GPIOA, "gpioa", "ck_mcu", 0, G_GPIOA),
PCLK(GPIOB, "gpiob", "ck_mcu", 0, G_GPIOB),
PCLK(GPIOC, "gpioc", "ck_mcu", 0, G_GPIOC),
PCLK(GPIOD, "gpiod", "ck_mcu", 0, G_GPIOD),
PCLK(GPIOE, "gpioe", "ck_mcu", 0, G_GPIOE),
PCLK(GPIOF, "gpiof", "ck_mcu", 0, G_GPIOF),
PCLK(GPIOG, "gpiog", "ck_mcu", 0, G_GPIOG),
PCLK(GPIOH, "gpioh", "ck_mcu", 0, G_GPIOH),
PCLK(GPIOI, "gpioi", "ck_mcu", 0, G_GPIOI),
PCLK(GPIOJ, "gpioj", "ck_mcu", 0, G_GPIOJ),
PCLK(GPIOK, "gpiok", "ck_mcu", 0, G_GPIOK),
PCLK(GPIOZ, "gpioz", "ck_axi", CLK_IGNORE_UNUSED, G_GPIOZ),
PCLK(CRYP1, "cryp1", "ck_axi", CLK_IGNORE_UNUSED, G_CRYP1),
PCLK(HASH1, "hash1", "ck_axi", CLK_IGNORE_UNUSED, G_HASH1),
PCLK(RNG1, "rng1", "ck_axi", 0, G_RNG1),
PCLK(BKPSRAM, "bkpsram", "ck_axi", CLK_IGNORE_UNUSED, G_BKPSRAM),
PCLK(MDMA, "mdma", "ck_axi", 0, G_MDMA),
PCLK(GPU, "gpu", "ck_axi", 0, G_GPU),
PCLK(ETHTX, "ethtx", "ck_axi", 0, G_ETHTX),
PCLK(ETHRX, "ethrx", "ck_axi", 0, G_ETHRX),
PCLK(ETHMAC, "ethmac", "ck_axi", 0, G_ETHMAC),
PCLK(FMC, "fmc", "ck_axi", CLK_IGNORE_UNUSED, G_FMC),
PCLK(QSPI, "qspi", "ck_axi", CLK_IGNORE_UNUSED, G_QSPI),
PCLK(SDMMC1, "sdmmc1", "ck_axi", 0, G_SDMMC1),
PCLK(SDMMC2, "sdmmc2", "ck_axi", 0, G_SDMMC2),
PCLK(CRC1, "crc1", "ck_axi", 0, G_CRC1),
PCLK(USBH, "usbh", "ck_axi", 0, G_USBH),
PCLK(ETHSTP, "ethstp", "ck_axi", 0, G_ETHSTP),
PCLK(DDRPERFM, "ddrperfm", "pclk4", 0, G_DDRPERFM),
/* Kernel clocks */
KCLK(SDMMC1_K, "sdmmc1_k", sdmmc12_src, 0, G_SDMMC1, M_SDMMC12),
KCLK(SDMMC2_K, "sdmmc2_k", sdmmc12_src, 0, G_SDMMC2, M_SDMMC12),
KCLK(SDMMC3_K, "sdmmc3_k", sdmmc3_src, 0, G_SDMMC3, M_SDMMC3),
KCLK(FMC_K, "fmc_k", fmc_src, 0, G_FMC, M_FMC),
KCLK(QSPI_K, "qspi_k", qspi_src, 0, G_QSPI, M_QSPI),
KCLK(RNG1_K, "rng1_k", rng_src, 0, G_RNG1, M_RNG1),
KCLK(RNG2_K, "rng2_k", rng_src, 0, G_RNG2, M_RNG2),
KCLK(USBPHY_K, "usbphy_k", usbphy_src, 0, G_USBPHY, M_USBPHY),
KCLK(STGEN_K, "stgen_k", stgen_src, CLK_IS_CRITICAL, G_STGEN, M_STGEN),
KCLK(SPDIF_K, "spdif_k", spdif_src, 0, G_SPDIF, M_SPDIF),
KCLK(SPI1_K, "spi1_k", spi123_src, 0, G_SPI1, M_SPI1),
KCLK(SPI2_K, "spi2_k", spi123_src, 0, G_SPI2, M_SPI23),
KCLK(SPI3_K, "spi3_k", spi123_src, 0, G_SPI3, M_SPI23),
KCLK(SPI4_K, "spi4_k", spi45_src, 0, G_SPI4, M_SPI45),
KCLK(SPI5_K, "spi5_k", spi45_src, 0, G_SPI5, M_SPI45),
KCLK(SPI6_K, "spi6_k", spi6_src, 0, G_SPI6, M_SPI6),
KCLK(CEC_K, "cec_k", cec_src, 0, G_CEC, M_CEC),
KCLK(I2C1_K, "i2c1_k", i2c12_src, 0, G_I2C1, M_I2C12),
KCLK(I2C2_K, "i2c2_k", i2c12_src, 0, G_I2C2, M_I2C12),
KCLK(I2C3_K, "i2c3_k", i2c35_src, 0, G_I2C3, M_I2C35),
KCLK(I2C5_K, "i2c5_k", i2c35_src, 0, G_I2C5, M_I2C35),
KCLK(I2C4_K, "i2c4_k", i2c46_src, 0, G_I2C4, M_I2C46),
KCLK(I2C6_K, "i2c6_k", i2c46_src, 0, G_I2C6, M_I2C46),
KCLK(LPTIM1_K, "lptim1_k", lptim1_src, 0, G_LPTIM1, M_LPTIM1),
KCLK(LPTIM2_K, "lptim2_k", lptim23_src, 0, G_LPTIM2, M_LPTIM23),
KCLK(LPTIM3_K, "lptim3_k", lptim23_src, 0, G_LPTIM3, M_LPTIM23),
KCLK(LPTIM4_K, "lptim4_k", lptim45_src, 0, G_LPTIM4, M_LPTIM45),
KCLK(LPTIM5_K, "lptim5_k", lptim45_src, 0, G_LPTIM5, M_LPTIM45),
KCLK(USART1_K, "usart1_k", usart1_src, 0, G_USART1, M_USART1),
KCLK(USART2_K, "usart2_k", usart234578_src, 0, G_USART2, M_UART24),
KCLK(USART3_K, "usart3_k", usart234578_src, 0, G_USART3, M_UART35),
KCLK(UART4_K, "uart4_k", usart234578_src, 0, G_UART4, M_UART24),
KCLK(UART5_K, "uart5_k", usart234578_src, 0, G_UART5, M_UART35),
KCLK(USART6_K, "uart6_k", usart6_src, 0, G_USART6, M_USART6),
KCLK(UART7_K, "uart7_k", usart234578_src, 0, G_UART7, M_UART78),
KCLK(UART8_K, "uart8_k", usart234578_src, 0, G_UART8, M_UART78),
KCLK(FDCAN_K, "fdcan_k", fdcan_src, 0, G_FDCAN, M_FDCAN),
KCLK(SAI1_K, "sai1_k", sai_src, 0, G_SAI1, M_SAI1),
KCLK(SAI2_K, "sai2_k", sai2_src, 0, G_SAI2, M_SAI2),
KCLK(SAI3_K, "sai3_k", sai_src, 0, G_SAI3, M_SAI3),
KCLK(SAI4_K, "sai4_k", sai_src, 0, G_SAI4, M_SAI4),
KCLK(ADC12_K, "adc12_k", adc12_src, 0, G_ADC12, M_ADC12),
KCLK(DSI_K, "dsi_k", dsi_src, 0, G_DSI, M_DSI),
KCLK(ADFSDM_K, "adfsdm_k", sai_src, 0, G_ADFSDM, M_SAI1),
KCLK(USBO_K, "usbo_k", usbo_src, 0, G_USBO, M_USBO),
KCLK(ETHCK_K, "ethck_k", eth_src, 0, G_ETHCK, M_ETHCK),
/* Particulary Kernel Clocks (no mux or no gate) */
MGATE_MP1(DFSDM_K, "dfsdm_k", "ck_mcu", 0, G_DFSDM),
MGATE_MP1(DSI_PX, "dsi_px", "pll4_q", CLK_SET_RATE_PARENT, G_DSI),
MGATE_MP1(LTDC_PX, "ltdc_px", "pll4_q", CLK_SET_RATE_PARENT, G_LTDC),
MGATE_MP1(GPU_K, "gpu_k", "pll2_q", 0, G_GPU),
MGATE_MP1(DAC12_K, "dac12_k", "ck_lsi", 0, G_DAC12),
COMPOSITE(ETHPTP_K, "ethptp_k", eth_src, CLK_OPS_PARENT_ENABLE |
CLK_SET_RATE_NO_REPARENT,
_NO_GATE,
_MMUX(M_ETHCK),
_DIV(RCC_ETHCKSELR, 4, 4, 0, NULL)),
/* RTC clock */
COMPOSITE(RTC, "ck_rtc", rtc_src, CLK_OPS_PARENT_ENABLE,
_GATE(RCC_BDCR, 20, 0),
_MUX(RCC_BDCR, 16, 2, 0),
_DIV_RTC(RCC_RTCDIVR, 0, 6, 0, NULL)),
/* MCO clocks */
COMPOSITE(CK_MCO1, "ck_mco1", mco1_src, CLK_OPS_PARENT_ENABLE |
CLK_SET_RATE_NO_REPARENT,
_GATE(RCC_MCO1CFGR, 12, 0),
_MUX(RCC_MCO1CFGR, 0, 3, 0),
_DIV(RCC_MCO1CFGR, 4, 4, 0, NULL)),
COMPOSITE(CK_MCO2, "ck_mco2", mco2_src, CLK_OPS_PARENT_ENABLE |
CLK_SET_RATE_NO_REPARENT,
_GATE(RCC_MCO2CFGR, 12, 0),
_MUX(RCC_MCO2CFGR, 0, 3, 0),
_DIV(RCC_MCO2CFGR, 4, 4, 0, NULL)),
/* Debug clocks */
GATE(CK_DBG, "ck_sys_dbg", "ck_axi", CLK_IGNORE_UNUSED,
RCC_DBGCFGR, 8, 0),
COMPOSITE(CK_TRACE, "ck_trace", ck_trace_src, CLK_OPS_PARENT_ENABLE,
_GATE(RCC_DBGCFGR, 9, 0),
_NO_MUX,
_DIV(RCC_DBGCFGR, 0, 3, 0, ck_trace_div_table)),
};
static const u32 stm32mp1_clock_secured[] = {
CK_HSE,
CK_HSI,
CK_CSI,
CK_LSI,
CK_LSE,
PLL1,
PLL2,
PLL1_P,
PLL2_P,
PLL2_Q,
PLL2_R,
CK_MPU,
CK_AXI,
SPI6,
I2C4,
I2C6,
USART1,
RTCAPB,
TZC1,
TZC2,
TZPC,
IWDG1,
BSEC,
STGEN,
GPIOZ,
CRYP1,
HASH1,
RNG1,
BKPSRAM,
RNG1_K,
STGEN_K,
SPI6_K,
I2C4_K,
I2C6_K,
USART1_K,
RTC,
};
static bool stm32_check_security(const struct clock_config *cfg)
{
int i;
for (i = 0; i < ARRAY_SIZE(stm32mp1_clock_secured); i++)
if (cfg->id == stm32mp1_clock_secured[i])
return true;
return false;
}
struct stm32_rcc_match_data {
const struct clock_config *cfg;
unsigned int num;
unsigned int maxbinding;
u32 clear_offset;
bool (*check_security)(const struct clock_config *cfg);
};
static struct stm32_rcc_match_data stm32mp1_data = {
.cfg = stm32mp1_clock_cfg,
.num = ARRAY_SIZE(stm32mp1_clock_cfg),
.maxbinding = STM32MP1_LAST_CLK,
.clear_offset = RCC_CLR,
};
static struct stm32_rcc_match_data stm32mp1_data_secure = {
.cfg = stm32mp1_clock_cfg,
.num = ARRAY_SIZE(stm32mp1_clock_cfg),
.maxbinding = STM32MP1_LAST_CLK,
.clear_offset = RCC_CLR,
.check_security = &stm32_check_security
};
static const struct of_device_id stm32mp1_match_data[] = {
{
.compatible = "st,stm32mp1-rcc",
.data = &stm32mp1_data,
},
{
.compatible = "st,stm32mp1-rcc-secure",
.data = &stm32mp1_data_secure,
},
{ }
};
MODULE_DEVICE_TABLE(of, stm32mp1_match_data);
static int stm32_register_hw_clk(struct device *dev,
struct clk_hw_onecell_data *clk_data,
void __iomem *base, spinlock_t *lock,
const struct clock_config *cfg)
{
struct clk_hw **hws;
struct clk_hw *hw = ERR_PTR(-ENOENT);
hws = clk_data->hws;
if (cfg->func)
hw = (*cfg->func)(dev, clk_data, base, lock, cfg);
if (IS_ERR(hw)) {
pr_err("Unable to register %s\n", cfg->name);
return PTR_ERR(hw);
}
if (cfg->id != NO_ID)
hws[cfg->id] = hw;
return 0;
}
#define STM32_RESET_ID_MASK GENMASK(15, 0)
struct stm32_reset_data {
/* reset lock */
spinlock_t lock;
struct reset_controller_dev rcdev;
void __iomem *membase;
u32 clear_offset;
};
static inline struct stm32_reset_data *
to_stm32_reset_data(struct reset_controller_dev *rcdev)
{
return container_of(rcdev, struct stm32_reset_data, rcdev);
}
static int stm32_reset_update(struct reset_controller_dev *rcdev,
unsigned long id, bool assert)
{
struct stm32_reset_data *data = to_stm32_reset_data(rcdev);
int reg_width = sizeof(u32);
int bank = id / (reg_width * BITS_PER_BYTE);
int offset = id % (reg_width * BITS_PER_BYTE);
if (data->clear_offset) {
void __iomem *addr;
addr = data->membase + (bank * reg_width);
if (!assert)
addr += data->clear_offset;
writel(BIT(offset), addr);
} else {
unsigned long flags;
u32 reg;
spin_lock_irqsave(&data->lock, flags);
reg = readl(data->membase + (bank * reg_width));
if (assert)
reg |= BIT(offset);
else
reg &= ~BIT(offset);
writel(reg, data->membase + (bank * reg_width));
spin_unlock_irqrestore(&data->lock, flags);
}
return 0;
}
static int stm32_reset_assert(struct reset_controller_dev *rcdev,
unsigned long id)
{
return stm32_reset_update(rcdev, id, true);
}
static int stm32_reset_deassert(struct reset_controller_dev *rcdev,
unsigned long id)
{
return stm32_reset_update(rcdev, id, false);
}
static int stm32_reset_status(struct reset_controller_dev *rcdev,
unsigned long id)
{
struct stm32_reset_data *data = to_stm32_reset_data(rcdev);
int reg_width = sizeof(u32);
int bank = id / (reg_width * BITS_PER_BYTE);
int offset = id % (reg_width * BITS_PER_BYTE);
u32 reg;
reg = readl(data->membase + (bank * reg_width));
return !!(reg & BIT(offset));
}
static const struct reset_control_ops stm32_reset_ops = {
.assert = stm32_reset_assert,
.deassert = stm32_reset_deassert,
.status = stm32_reset_status,
};
static int stm32_rcc_reset_init(struct device *dev, void __iomem *base,
const struct of_device_id *match)
{
const struct stm32_rcc_match_data *data = match->data;
struct stm32_reset_data *reset_data = NULL;
reset_data = kzalloc(sizeof(*reset_data), GFP_KERNEL);
if (!reset_data)
return -ENOMEM;
spin_lock_init(&reset_data->lock);
reset_data->membase = base;
reset_data->rcdev.owner = THIS_MODULE;
reset_data->rcdev.ops = &stm32_reset_ops;
reset_data->rcdev.of_node = dev_of_node(dev);
reset_data->rcdev.nr_resets = STM32_RESET_ID_MASK;
reset_data->clear_offset = data->clear_offset;
return reset_controller_register(&reset_data->rcdev);
}
static int stm32_rcc_clock_init(struct device *dev, void __iomem *base,
const struct of_device_id *match)
{
const struct stm32_rcc_match_data *data = match->data;
struct clk_hw_onecell_data *clk_data;
struct clk_hw **hws;
int err, n, max_binding;
max_binding = data->maxbinding;
clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, max_binding),
GFP_KERNEL);
if (!clk_data)
return -ENOMEM;
clk_data->num = max_binding;
hws = clk_data->hws;
for (n = 0; n < max_binding; n++)
hws[n] = ERR_PTR(-ENOENT);
for (n = 0; n < data->num; n++) {
if (data->check_security && data->check_security(&data->cfg[n]))
continue;
err = stm32_register_hw_clk(dev, clk_data, base, &rlock,
&data->cfg[n]);
if (err) {
dev_err(dev, "Can't register clk %s: %d\n",
data->cfg[n].name, err);
return err;
}
}
return of_clk_add_hw_provider(dev_of_node(dev), of_clk_hw_onecell_get, clk_data);
}
static int stm32_rcc_init(struct device *dev, void __iomem *base,
const struct of_device_id *match_data)
{
const struct of_device_id *match;
int err;
match = of_match_node(match_data, dev_of_node(dev));
if (!match) {
dev_err(dev, "match data not found\n");
return -ENODEV;
}
/* RCC Reset Configuration */
err = stm32_rcc_reset_init(dev, base, match);
if (err) {
pr_err("stm32mp1 reset failed to initialize\n");
return err;
}
/* RCC Clock Configuration */
err = stm32_rcc_clock_init(dev, base, match);
if (err) {
pr_err("stm32mp1 clock failed to initialize\n");
return err;
}
return 0;
}
static int stm32mp1_rcc_init(struct device *dev)
{
void __iomem *base;
int ret;
base = of_iomap(dev_of_node(dev), 0);
if (!base) {
pr_err("%pOFn: unable to map resource", dev_of_node(dev));
ret = -ENOMEM;
goto out;
}
ret = stm32_rcc_init(dev, base, stm32mp1_match_data);
out:
if (ret) {
if (base)
iounmap(base);
of_node_put(dev_of_node(dev));
}
return ret;
}
static int get_clock_deps(struct device *dev)
{
static const char * const clock_deps_name[] = {
"hsi", "hse", "csi", "lsi", "lse",
};
size_t deps_size = sizeof(struct clk *) * ARRAY_SIZE(clock_deps_name);
struct clk **clk_deps;
int i;
clk_deps = devm_kzalloc(dev, deps_size, GFP_KERNEL);
if (!clk_deps)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(clock_deps_name); i++) {
struct clk *clk = of_clk_get_by_name(dev_of_node(dev),
clock_deps_name[i]);
if (IS_ERR(clk)) {
if (PTR_ERR(clk) != -EINVAL && PTR_ERR(clk) != -ENOENT)
return PTR_ERR(clk);
} else {
/* Device gets a reference count on the clock */
clk_deps[i] = devm_clk_get(dev, __clk_get_name(clk));
clk_put(clk);
}
}
return 0;
}
static int stm32mp1_rcc_clocks_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
int ret = get_clock_deps(dev);
if (!ret)
ret = stm32mp1_rcc_init(dev);
return ret;
}
static int stm32mp1_rcc_clocks_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *child, *np = dev_of_node(dev);
for_each_available_child_of_node(np, child)
of_clk_del_provider(child);
return 0;
}
static struct platform_driver stm32mp1_rcc_clocks_driver = {
.driver = {
.name = "stm32mp1_rcc",
.of_match_table = stm32mp1_match_data,
},
.probe = stm32mp1_rcc_clocks_probe,
.remove = stm32mp1_rcc_clocks_remove,
};
static int __init stm32mp1_clocks_init(void)
{
return platform_driver_register(&stm32mp1_rcc_clocks_driver);
}
core_initcall(stm32mp1_clocks_init);
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