@@ -854,6 +854,138 @@ static struct clk_hw *clk_register_pll(struct device *dev, const char *name,
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 = kzalloc(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) {
+ kfree(tim_ker);
+ return ERR_PTR(err);
+ }
+
+ return hw;
+}
+
static struct clk_hw *
_clk_register_mp1_gate(struct device *dev,
struct clk_hw_onecell_data *clk_data,
@@ -887,6 +1019,23 @@ struct clk_hw *_clk_register_pll(struct device *dev,
base + stm_pll_cfg->offset, 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);
+}
+
#define GATE(_id, _name, _parent, _flags, _offset, _bit_idx, _gate_flags)\
{\
.id = _id,\
@@ -1056,6 +1205,23 @@ struct clk_hw *_clk_register_pll(struct device *dev,
.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)\
+ MP1_GATE(_id, _name, _parent, CLK_SET_RATE_PARENT,\
+ _offset_set, _bit_idx, 0)
+
static const struct clock_config stm32mp1_clock_cfg[] = {
/* Oscillator divider */
DIV(NO_ID, "clk-hsi-div", "clk-hsi", 0, RCC_HSICFGR, 0, 2,
@@ -1152,6 +1318,25 @@ struct clk_hw *_clk_register_pll(struct device *dev,
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),
};
struct stm32_clock_match_data {