From: Gabriel Fernandez <gabriel.fernandez@xxxxxx>
Each PLL has 3 outputs with post-dividers.
pll1_p is dedicated for Cortex-A7
pll1_q is not connected
pll1_r is not connected
pll2_p is dedicated for AXI
pll2_q is dedicated for GPU
pll2_r is dedicated for DDR
pll3_p is dedicated for mcu
pll3_q is for Peripheral Kernel Clock
pll3_r is for Peripheral Kernel Clock
pll4_p is for Peripheral Kernel Clock
pll4_q is for Peripheral Kernel Clock
pll4_r is for Peripheral Kernel Clock
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@xxxxxx>
---
drivers/clk/clk-stm32mp1.c | 257 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 257 insertions(+)
diff --git a/drivers/clk/clk-stm32mp1.c b/drivers/clk/clk-stm32mp1.c
index 33f0d09..15cd488 100644
--- a/drivers/clk/clk-stm32mp1.c
+++ b/drivers/clk/clk-stm32mp1.c
@@ -377,6 +377,147 @@ struct mux_cfg {
u32 *table;
};
+/* STM32 Composite clock */
+struct composite_cfg {
+ struct gate_cfg *gate;
+ struct mux_cfg *mux;
+ struct div_cfg *div;
+ const struct clk_ops *mux_ops;
+ const struct clk_ops *div_ops;
+ const struct clk_ops *gate_ops;
+};
+
+static struct clk_mux *_get_cmux(void __iomem *reg, u8 shift, u8 width,
+ u32 flags, u32 *table, 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;
+ mux->table = table;
+
+ return mux;
+}
+
+static struct clk_divider *_get_cdiv(void __iomem *reg, u8 shift, u8 width,
+ u32 flags,
+ const struct clk_div_table *table,
+ 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;
+ div->table = table;
+
+ 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;
+}
+
+static struct clk_hw *
+clk_stm_register_composite(struct device *dev,
+ const char *name, const char * const *parent_names,
+ int num_parents, void __iomem *base,
+ const struct composite_cfg *cfg,
+ unsigned long flags, 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 *hw;
+ struct clk_hw *mux_hw;
+ struct clk_hw *div_hw;
+ struct clk_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 = _get_cmux(base + cfg->mux->reg_off,
+ cfg->mux->shift,
+ cfg->mux->width,
+ cfg->mux->mux_flags,
+ cfg->mux->table,
+ lock);
+
+ if (!IS_ERR(mux)) {
+ mux_hw = &mux->hw;
+ mux_ops = cfg->mux_ops ?
+ cfg->mux_ops : &clk_mux_ops;
+ }
+ }
+
+ if (cfg->div) {
+ div = _get_cdiv(base + cfg->div->reg_off,
+ cfg->div->shift,
+ cfg->div->width,
+ cfg->div->div_flags,
+ cfg->div->table,
+ lock);
+
+ if (!IS_ERR(div)) {
+ div_hw = &div->hw;
+ div_ops = cfg->div_ops ?
+ cfg->div_ops : &clk_divider_ops;
+ }
+ }
+
+ if (cfg->gate) {
+ gate = _get_cgate(base + cfg->gate->reg_off,
+ cfg->gate->bit_idx,
+ cfg->gate->gate_flags,
+ lock);
+
+ if (!IS_ERR(gate)) {
+ gate_hw = &gate->hw;
+ gate_ops = cfg->gate_ops ?
+ cfg->gate_ops : &clk_gate_ops;
+ }
+ }
+
+ hw = clk_hw_register_composite(dev, name, parent_names, num_parents,
+ mux_hw, mux_ops, div_hw, div_ops,
+ gate_hw, gate_ops, flags);
+
+ return hw;
+}
+
static struct clk_hw *
_clk_hw_register_gate(struct device *dev,
struct clk_hw_onecell_data *clk_data,
@@ -442,6 +583,17 @@ struct mux_cfg {
mux_cfg->width, mux_cfg->mux_flags, lock);
}
+static struct clk_hw *
+_clk_stm_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_stm_register_composite(dev, cfg->name, cfg->parent_names,
+ cfg->num_parents, base, cfg->cfg,
+ cfg->flags, lock);
+}
+
/* MP1 Gate clock with set & clear registers */
static int mp1_gate_clk_enable(struct clk_hw *hw)
@@ -779,6 +931,76 @@ struct clk_hw *_clk_register_pll(struct device *dev,
.func = _clk_hw_register_mux,\
}
+#define COMPOSITE(_id, _name, _parents, _flags, _cfg)\
+{\
+ .id = _id,\
+ .name = _name,\
+ .parent_names = _parents,\
+ .num_parents = ARRAY_SIZE(_parents),\
+ .flags = _flags,\
+ .cfg = &(struct composite_cfg)_cfg,\
+ .func = _clk_stm_register_composite,\
+}
+
+#define PARENT(_parent) ((const char *[]) { _parent})
+
+#define _NO_MUX .mux = NULL, .mux_ops = NULL
+#define _NO_DIV .div = NULL, .div_ops = NULL
+#define _NO_GATE .gate = NULL, .gate_ops = NULL
+
+#define _GATE_OPS(_offset, _bit_idx, _gate_flags, _gate_ops) \
+ .gate = &(struct gate_cfg) {\
+ .reg_off = _offset,\
+ .bit_idx = _bit_idx,\
+ },\
+ .gate_ops = _gate_ops
+
+#define _GATE(_offset, _bit_idx, _gate_flags)\
+ _GATE_OPS(_offset, _bit_idx, _gate_flags, NULL)
+
+#define _DIV_TABLE_OPS(_offset, _shift, _width, _div_flags, _div_table,\
+ _div_ops)\
+ .div = &(struct div_cfg) {\
+ .reg_off = _offset,\
+ .shift = _shift,\
+ .width = _width,\
+ .div_flags = _div_flags,\
+ .table = _div_table,\
+ },\
+ .div_ops = _div_ops
+
+#define _DIV_TABLE(_offset, _shift, _width, _div_flags, _div_table)\
+ _DIV_TABLE_OPS(_offset, _shift, _width, _div_flags,\
+ _div_table, NULL)
+
+#define _DIV_OPS(_offset, _shift, _width, _div_flags, _div_ops)\
+ _DIV_TABLE_OPS(_offset, _shift, _width, _div_flags, NULL, _div_ops)
+
+#define _DIV(_offset, _shift, _width, _div_flags)\
+ _DIV_OPS(_offset, _shift, _width, _div_flags, NULL)
+
+#define _MUX(_offset, _shift, _width, _mux_flags)\
+ .mux = &(struct mux_cfg) {\
+ .reg_off = _offset,\
+ .shift = _shift,\
+ .width = _width,\
+ .mux_flags = _mux_flags,\
+ .table = NULL,\
+ },\
+ .mux_ops = NULL
+
+#define _GATEDIV(_gate_offset,\
+ _bit_idx,\
+ _div_offset,\
+ _div_shift,\
+ _div_width,\
+ _div_table)\
+{\
+ _DIV_TABLE(_div_offset, _div_shift, _div_width, 0, _div_table),\
+ _GATE(_gate_offset, _bit_idx, 0),\
+ _NO_MUX,\
+}
+
#define MP1_GATE(_id, _name, _parent, _flags, _offset, _bit_idx, _gate_flags)\
{\
.id = _id,\
@@ -834,6 +1056,41 @@ struct clk_hw *_clk_register_pll(struct device *dev,
PLL(PLL2, "pll2", "ref1", CLK_IGNORE_UNUSED, RCC_PLL2CR),
PLL(PLL3, "pll3", "ref3", CLK_IGNORE_UNUSED, RCC_PLL3CR),
PLL(PLL4, "pll4", "ref4", CLK_IGNORE_UNUSED, RCC_PLL4CR),
+
+ /* ODF */
+ COMPOSITE(PLL1_P, "pll1_p", PARENT("pll1"), 0,
+ _GATEDIV(RCC_PLL1CR, 4,
+ RCC_PLL1CFGR2, 0, 7, NULL)),
+
+ COMPOSITE(PLL2_P, "pll2_p", PARENT("pll2"), 0,
+ _GATEDIV(RCC_PLL2CR, 4,
+ RCC_PLL2CFGR2, 0, 7, NULL)),
+ COMPOSITE(PLL2_Q, "pll2_q", PARENT("pll2"), 0,
+ _GATEDIV(RCC_PLL2CR, 5,
+ RCC_PLL2CFGR2, 8, 7, NULL)),
+ COMPOSITE(PLL2_R, "pll2_r", PARENT("pll2"), CLK_IS_CRITICAL,
+ _GATEDIV(RCC_PLL2CR, 6,
+ RCC_PLL2CFGR2, 16, 7, NULL)),
+
+ COMPOSITE(PLL3_P, "pll3_p", PARENT("pll3"), 0,
+ _GATEDIV(RCC_PLL3CR, 4,
+ RCC_PLL3CFGR2, 0, 7, NULL)),
+ COMPOSITE(PLL3_Q, "pll3_q", PARENT("pll3"), 0,
+ _GATEDIV(RCC_PLL3CR, 5,
+ RCC_PLL3CFGR2, 8, 7, NULL)),
+ COMPOSITE(PLL3_R, "pll3_r", PARENT("pll3"), 0,
+ _GATEDIV(RCC_PLL3CR, 6,
+ RCC_PLL3CFGR2, 16, 7, NULL)),
+
+ COMPOSITE(PLL4_P, "pll4_p", PARENT("pll4"), 0,
+ _GATEDIV(RCC_PLL4CR, 4,
+ RCC_PLL4CFGR2, 0, 7, NULL)),
+ COMPOSITE(PLL4_Q, "pll4_q", PARENT("pll4"), 0,
+ _GATEDIV(RCC_PLL4CR, 5,
+ RCC_PLL4CFGR2, 8, 7, NULL)),
+ COMPOSITE(PLL4_R, "pll4_r", PARENT("pll4"), 0,
+ _GATEDIV(RCC_PLL4CR, 6,
+ RCC_PLL4CFGR2, 16, 7, NULL)),
};
struct stm32_clock_match_data {
--
1.9.1
--
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