diff options
| -rw-r--r-- | drivers/clk/stm32/clk-stm32-core.c | 174 | ||||
| -rw-r--r-- | drivers/clk/stm32/clk-stm32-core.h | 23 | ||||
| -rw-r--r-- | drivers/clk/stm32/clk-stm32mp13.c | 28 |
3 files changed, 225 insertions, 0 deletions
diff --git a/drivers/clk/stm32/clk-stm32-core.c b/drivers/clk/stm32/clk-stm32-core.c index da38eca2b8c5..69e40c152d2f 100644 --- a/drivers/clk/stm32/clk-stm32-core.c +++ b/drivers/clk/stm32/clk-stm32-core.c @@ -389,6 +389,159 @@ const struct clk_ops clk_stm32_divider_ops = { .set_rate = clk_stm32_divider_set_rate, }; +static int clk_stm32_composite_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct clk_stm32_composite *composite = to_clk_stm32_composite(hw); + unsigned long flags = 0; + int ret; + + if (composite->div_id == NO_STM32_DIV) + return rate; + + spin_lock_irqsave(composite->lock, flags); + + ret = stm32_divider_set_rate(composite->base, composite->clock_data, + composite->div_id, rate, parent_rate); + + spin_unlock_irqrestore(composite->lock, flags); + + return ret; +} + +static unsigned long clk_stm32_composite_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_stm32_composite *composite = to_clk_stm32_composite(hw); + + if (composite->div_id == NO_STM32_DIV) + return parent_rate; + + return stm32_divider_get_rate(composite->base, composite->clock_data, + composite->div_id, parent_rate); +} + +static long clk_stm32_composite_round_rate(struct clk_hw *hw, unsigned long rate, + unsigned long *prate) +{ + struct clk_stm32_composite *composite = to_clk_stm32_composite(hw); + + const struct stm32_div_cfg *divider; + + if (composite->div_id == NO_STM32_DIV) + return rate; + + divider = &composite->clock_data->dividers[composite->div_id]; + + /* if read only, just return current value */ + if (divider->flags & CLK_DIVIDER_READ_ONLY) { + u32 val; + + val = readl(composite->base + divider->offset) >> divider->shift; + val &= clk_div_mask(divider->width); + + return divider_ro_round_rate(hw, rate, prate, divider->table, + divider->width, divider->flags, + val); + } + + return divider_round_rate_parent(hw, clk_hw_get_parent(hw), + rate, prate, divider->table, + divider->width, divider->flags); +} + +static u8 clk_stm32_composite_get_parent(struct clk_hw *hw) +{ + struct clk_stm32_composite *composite = to_clk_stm32_composite(hw); + + return stm32_mux_get_parent(composite->base, composite->clock_data, composite->mux_id); +} + +static int clk_stm32_composite_set_parent(struct clk_hw *hw, u8 index) +{ + struct clk_stm32_composite *composite = to_clk_stm32_composite(hw); + unsigned long flags = 0; + + spin_lock_irqsave(composite->lock, flags); + + stm32_mux_set_parent(composite->base, composite->clock_data, composite->mux_id, index); + + spin_unlock_irqrestore(composite->lock, flags); + + return 0; +} + +static int clk_stm32_composite_is_enabled(struct clk_hw *hw) +{ + struct clk_stm32_composite *composite = to_clk_stm32_composite(hw); + + if (composite->gate_id == NO_STM32_GATE) + return (__clk_get_enable_count(hw->clk) > 0); + + return stm32_gate_is_enabled(composite->base, composite->clock_data, composite->gate_id); +} + +static void clk_stm32_composite_gate_endisable(struct clk_hw *hw, int enable) +{ + struct clk_stm32_composite *composite = to_clk_stm32_composite(hw); + unsigned long flags = 0; + + spin_lock_irqsave(composite->lock, flags); + + stm32_gate_endisable(composite->base, composite->clock_data, composite->gate_id, enable); + + spin_unlock_irqrestore(composite->lock, flags); +} + +static int clk_stm32_composite_gate_enable(struct clk_hw *hw) +{ + struct clk_stm32_composite *composite = to_clk_stm32_composite(hw); + + if (composite->gate_id == NO_STM32_GATE) + return 0; + + clk_stm32_composite_gate_endisable(hw, 1); + + return 0; +} + +static void clk_stm32_composite_gate_disable(struct clk_hw *hw) +{ + struct clk_stm32_composite *composite = to_clk_stm32_composite(hw); + + if (composite->gate_id == NO_STM32_GATE) + return; + + clk_stm32_composite_gate_endisable(hw, 0); +} + +static void clk_stm32_composite_disable_unused(struct clk_hw *hw) +{ + struct clk_stm32_composite *composite = to_clk_stm32_composite(hw); + unsigned long flags = 0; + + if (composite->gate_id == NO_STM32_GATE) + return; + + spin_lock_irqsave(composite->lock, flags); + + stm32_gate_disable_unused(composite->base, composite->clock_data, composite->gate_id); + + spin_unlock_irqrestore(composite->lock, flags); +} + +const struct clk_ops clk_stm32_composite_ops = { + .set_rate = clk_stm32_composite_set_rate, + .recalc_rate = clk_stm32_composite_recalc_rate, + .round_rate = clk_stm32_composite_round_rate, + .get_parent = clk_stm32_composite_get_parent, + .set_parent = clk_stm32_composite_set_parent, + .enable = clk_stm32_composite_gate_enable, + .disable = clk_stm32_composite_gate_disable, + .is_enabled = clk_stm32_composite_is_enabled, + .disable_unused = clk_stm32_composite_disable_unused, +}; + struct clk_hw *clk_stm32_mux_register(struct device *dev, const struct stm32_rcc_match_data *data, void __iomem *base, @@ -451,3 +604,24 @@ struct clk_hw *clk_stm32_div_register(struct device *dev, return hw; } + +struct clk_hw *clk_stm32_composite_register(struct device *dev, + const struct stm32_rcc_match_data *data, + void __iomem *base, + spinlock_t *lock, + const struct clock_config *cfg) +{ + struct clk_stm32_composite *composite = cfg->clock_cfg; + struct clk_hw *hw = &composite->hw; + int err; + + composite->base = base; + composite->lock = lock; + composite->clock_data = data->clock_data; + + err = clk_hw_register(dev, hw); + if (err) + return ERR_PTR(err); + + return hw; +} diff --git a/drivers/clk/stm32/clk-stm32-core.h b/drivers/clk/stm32/clk-stm32-core.h index c2de58a22aa8..6c5c8c08ecbf 100644 --- a/drivers/clk/stm32/clk-stm32-core.h +++ b/drivers/clk/stm32/clk-stm32-core.h @@ -114,10 +114,23 @@ struct clk_stm32_div { #define to_clk_stm32_divider(_hw) container_of(_hw, struct clk_stm32_div, hw) +struct clk_stm32_composite { + u16 gate_id; + u16 mux_id; + u16 div_id; + struct clk_hw hw; + void __iomem *base; + struct clk_stm32_clock_data *clock_data; + spinlock_t *lock; /* spin lock */ +}; + +#define to_clk_stm32_composite(_hw) container_of(_hw, struct clk_stm32_composite, hw) + /* Clock operators */ extern const struct clk_ops clk_stm32_mux_ops; extern const struct clk_ops clk_stm32_gate_ops; extern const struct clk_ops clk_stm32_divider_ops; +extern const struct clk_ops clk_stm32_composite_ops; /* Clock registering */ struct clk_hw *clk_stm32_mux_register(struct device *dev, @@ -138,6 +151,12 @@ struct clk_hw *clk_stm32_div_register(struct device *dev, spinlock_t *lock, const struct clock_config *cfg); +struct clk_hw *clk_stm32_composite_register(struct device *dev, + const struct stm32_rcc_match_data *data, + void __iomem *base, + spinlock_t *lock, + const struct clock_config *cfg); + #define STM32_CLOCK_CFG(_binding, _clk, _struct, _register)\ {\ .id = (_binding),\ @@ -156,3 +175,7 @@ struct clk_hw *clk_stm32_div_register(struct device *dev, #define STM32_DIV_CFG(_binding, _clk)\ STM32_CLOCK_CFG(_binding, &(_clk), struct clk_stm32_div *,\ &clk_stm32_div_register) + +#define STM32_COMPOSITE_CFG(_binding, _clk)\ + STM32_CLOCK_CFG(_binding, &(_clk), struct clk_stm32_composite *,\ + &clk_stm32_composite_register) diff --git a/drivers/clk/stm32/clk-stm32mp13.c b/drivers/clk/stm32/clk-stm32mp13.c index d93d92b5fe82..af9518a0d262 100644 --- a/drivers/clk/stm32/clk-stm32mp13.c +++ b/drivers/clk/stm32/clk-stm32mp13.c @@ -404,6 +404,14 @@ static const char * const eth12_src[] = { "pll4_p", "pll3_q" }; +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_mlahb", "pll4_p", "ck_hse", "ck_hsi" +}; + static struct clk_stm32_mux ck_ker_eth1 = { .mux_id = MUX_ETH1, .hw.init = CLK_HW_INIT_PARENTS("ck_ker_eth1", eth12_src, &clk_stm32_mux_ops, @@ -421,10 +429,30 @@ static struct clk_stm32_div eth1ptp_k = { CLK_SET_RATE_NO_REPARENT), }; +static struct clk_stm32_composite ck_mco1 = { + .gate_id = GATE_MCO1, + .mux_id = MUX_MCO1, + .div_id = DIV_MCO1, + .hw.init = CLK_HW_INIT_PARENTS("ck_mco1", mco1_src, &clk_stm32_composite_ops, + CLK_OPS_PARENT_ENABLE | CLK_SET_RATE_NO_REPARENT | + CLK_IGNORE_UNUSED), +}; + +static struct clk_stm32_composite ck_mco2 = { + .gate_id = GATE_MCO2, + .mux_id = MUX_MCO2, + .div_id = DIV_MCO2, + .hw.init = CLK_HW_INIT_PARENTS("ck_mco2", mco2_src, &clk_stm32_composite_ops, + CLK_OPS_PARENT_ENABLE | CLK_SET_RATE_NO_REPARENT | + CLK_IGNORE_UNUSED), +}; + static const struct clock_config stm32mp13_clock_cfg[] = { STM32_MUX_CFG(NO_ID, ck_ker_eth1), STM32_GATE_CFG(ETH1CK_K, eth1ck_k), STM32_DIV_CFG(ETH1PTP_K, eth1ptp_k), + STM32_COMPOSITE_CFG(CK_MCO1, ck_mco1), + STM32_COMPOSITE_CFG(CK_MCO2, ck_mco2), }; static u16 stm32mp13_cpt_gate[GATE_NB]; |