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-rw-r--r--drivers/clk/stm32/clk-stm32-core.h188
1 files changed, 188 insertions, 0 deletions
diff --git a/drivers/clk/stm32/clk-stm32-core.h b/drivers/clk/stm32/clk-stm32-core.h
new file mode 100644
index 000000000..76cffda02
--- /dev/null
+++ b/drivers/clk/stm32/clk-stm32-core.h
@@ -0,0 +1,188 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) STMicroelectronics 2022 - All Rights Reserved
+ * Author: Gabriel Fernandez <gabriel.fernandez@foss.st.com> for STMicroelectronics.
+ */
+
+#include <linux/clk-provider.h>
+
+struct stm32_rcc_match_data;
+
+struct stm32_mux_cfg {
+ u16 offset;
+ u8 shift;
+ u8 width;
+ u8 flags;
+ u32 *table;
+ u8 ready;
+};
+
+struct stm32_gate_cfg {
+ u16 offset;
+ u8 bit_idx;
+ u8 set_clr;
+};
+
+struct stm32_div_cfg {
+ u16 offset;
+ u8 shift;
+ u8 width;
+ u8 flags;
+ u8 ready;
+ const struct clk_div_table *table;
+};
+
+struct stm32_composite_cfg {
+ int mux;
+ int gate;
+ int div;
+};
+
+#define NO_ID 0xFFFFFFFF
+
+#define NO_STM32_MUX 0xFFFF
+#define NO_STM32_DIV 0xFFFF
+#define NO_STM32_GATE 0xFFFF
+
+struct clock_config {
+ unsigned long id;
+ int sec_id;
+ void *clock_cfg;
+
+ struct clk_hw *(*func)(struct device *dev,
+ const struct stm32_rcc_match_data *data,
+ void __iomem *base,
+ spinlock_t *lock,
+ const struct clock_config *cfg);
+};
+
+struct clk_stm32_clock_data {
+ u16 *gate_cpt;
+ const struct stm32_gate_cfg *gates;
+ const struct stm32_mux_cfg *muxes;
+ const struct stm32_div_cfg *dividers;
+ struct clk_hw *(*is_multi_mux)(struct clk_hw *hw);
+};
+
+struct stm32_rcc_match_data {
+ struct clk_hw_onecell_data *hw_clks;
+ unsigned int num_clocks;
+ const struct clock_config *tab_clocks;
+ unsigned int maxbinding;
+ struct clk_stm32_clock_data *clock_data;
+ u32 clear_offset;
+ int (*check_security)(void __iomem *base,
+ const struct clock_config *cfg);
+ int (*multi_mux)(void __iomem *base, const struct clock_config *cfg);
+};
+
+int stm32_rcc_reset_init(struct device *dev, const struct of_device_id *match,
+ void __iomem *base);
+
+int stm32_rcc_init(struct device *dev, const struct of_device_id *match_data,
+ void __iomem *base);
+
+/* MUX define */
+#define MUX_NO_RDY 0xFF
+#define MUX_SAFE BIT(7)
+
+/* DIV define */
+#define DIV_NO_RDY 0xFF
+
+/* Definition of clock structure */
+struct clk_stm32_mux {
+ u16 mux_id;
+ struct clk_hw hw;
+ void __iomem *base;
+ struct clk_stm32_clock_data *clock_data;
+ spinlock_t *lock; /* spin lock */
+};
+
+#define to_clk_stm32_mux(_hw) container_of(_hw, struct clk_stm32_mux, hw)
+
+struct clk_stm32_gate {
+ u16 gate_id;
+ struct clk_hw hw;
+ void __iomem *base;
+ struct clk_stm32_clock_data *clock_data;
+ spinlock_t *lock; /* spin lock */
+};
+
+#define to_clk_stm32_gate(_hw) container_of(_hw, struct clk_stm32_gate, hw)
+
+struct clk_stm32_div {
+ 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_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,
+ const struct stm32_rcc_match_data *data,
+ void __iomem *base,
+ spinlock_t *lock,
+ const struct clock_config *cfg);
+
+struct clk_hw *clk_stm32_gate_register(struct device *dev,
+ const struct stm32_rcc_match_data *data,
+ void __iomem *base,
+ spinlock_t *lock,
+ const struct clock_config *cfg);
+
+struct clk_hw *clk_stm32_div_register(struct device *dev,
+ const struct stm32_rcc_match_data *data,
+ void __iomem *base,
+ 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, _sec_id, _struct, _register)\
+{\
+ .id = (_binding),\
+ .sec_id = (_sec_id),\
+ .clock_cfg = (_struct) {_clk},\
+ .func = (_register),\
+}
+
+#define STM32_MUX_CFG(_binding, _clk, _sec_id)\
+ STM32_CLOCK_CFG(_binding, &(_clk), _sec_id, struct clk_stm32_mux *,\
+ &clk_stm32_mux_register)
+
+#define STM32_GATE_CFG(_binding, _clk, _sec_id)\
+ STM32_CLOCK_CFG(_binding, &(_clk), _sec_id, struct clk_stm32_gate *,\
+ &clk_stm32_gate_register)
+
+#define STM32_DIV_CFG(_binding, _clk, _sec_id)\
+ STM32_CLOCK_CFG(_binding, &(_clk), _sec_id, struct clk_stm32_div *,\
+ &clk_stm32_div_register)
+
+#define STM32_COMPOSITE_CFG(_binding, _clk, _sec_id)\
+ STM32_CLOCK_CFG(_binding, &(_clk), _sec_id, struct clk_stm32_composite *,\
+ &clk_stm32_composite_register)