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-rw-r--r--drivers/clk/starfive/clk-starfive-jh71x0.h123
1 files changed, 123 insertions, 0 deletions
diff --git a/drivers/clk/starfive/clk-starfive-jh71x0.h b/drivers/clk/starfive/clk-starfive-jh71x0.h
new file mode 100644
index 000000000000..34bb11c72eb7
--- /dev/null
+++ b/drivers/clk/starfive/clk-starfive-jh71x0.h
@@ -0,0 +1,123 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __CLK_STARFIVE_JH71X0_H
+#define __CLK_STARFIVE_JH71X0_H
+
+#include <linux/bits.h>
+#include <linux/clk-provider.h>
+#include <linux/device.h>
+#include <linux/spinlock.h>
+
+/* register fields */
+#define JH71X0_CLK_ENABLE BIT(31)
+#define JH71X0_CLK_INVERT BIT(30)
+#define JH71X0_CLK_MUX_MASK GENMASK(27, 24)
+#define JH71X0_CLK_MUX_SHIFT 24
+#define JH71X0_CLK_DIV_MASK GENMASK(23, 0)
+#define JH71X0_CLK_FRAC_MASK GENMASK(15, 8)
+#define JH71X0_CLK_FRAC_SHIFT 8
+#define JH71X0_CLK_INT_MASK GENMASK(7, 0)
+
+/* fractional divider min/max */
+#define JH71X0_CLK_FRAC_MIN 100UL
+#define JH71X0_CLK_FRAC_MAX 25599UL
+
+/* clock data */
+struct jh71x0_clk_data {
+ const char *name;
+ unsigned long flags;
+ u32 max;
+ u8 parents[4];
+};
+
+#define JH71X0_GATE(_idx, _name, _flags, _parent) \
+[_idx] = { \
+ .name = _name, \
+ .flags = CLK_SET_RATE_PARENT | (_flags), \
+ .max = JH71X0_CLK_ENABLE, \
+ .parents = { [0] = _parent }, \
+}
+
+#define JH71X0__DIV(_idx, _name, _max, _parent) \
+[_idx] = { \
+ .name = _name, \
+ .flags = 0, \
+ .max = _max, \
+ .parents = { [0] = _parent }, \
+}
+
+#define JH71X0_GDIV(_idx, _name, _flags, _max, _parent) \
+[_idx] = { \
+ .name = _name, \
+ .flags = _flags, \
+ .max = JH71X0_CLK_ENABLE | (_max), \
+ .parents = { [0] = _parent }, \
+}
+
+#define JH71X0_FDIV(_idx, _name, _parent) \
+[_idx] = { \
+ .name = _name, \
+ .flags = 0, \
+ .max = JH71X0_CLK_FRAC_MAX, \
+ .parents = { [0] = _parent }, \
+}
+
+#define JH71X0__MUX(_idx, _name, _nparents, ...) \
+[_idx] = { \
+ .name = _name, \
+ .flags = 0, \
+ .max = ((_nparents) - 1) << JH71X0_CLK_MUX_SHIFT, \
+ .parents = { __VA_ARGS__ }, \
+}
+
+#define JH71X0_GMUX(_idx, _name, _flags, _nparents, ...) \
+[_idx] = { \
+ .name = _name, \
+ .flags = _flags, \
+ .max = JH71X0_CLK_ENABLE | \
+ (((_nparents) - 1) << JH71X0_CLK_MUX_SHIFT), \
+ .parents = { __VA_ARGS__ }, \
+}
+
+#define JH71X0_MDIV(_idx, _name, _max, _nparents, ...) \
+[_idx] = { \
+ .name = _name, \
+ .flags = 0, \
+ .max = (((_nparents) - 1) << JH71X0_CLK_MUX_SHIFT) | (_max), \
+ .parents = { __VA_ARGS__ }, \
+}
+
+#define JH71X0__GMD(_idx, _name, _flags, _max, _nparents, ...) \
+[_idx] = { \
+ .name = _name, \
+ .flags = _flags, \
+ .max = JH71X0_CLK_ENABLE | \
+ (((_nparents) - 1) << JH71X0_CLK_MUX_SHIFT) | (_max), \
+ .parents = { __VA_ARGS__ }, \
+}
+
+#define JH71X0__INV(_idx, _name, _parent) \
+[_idx] = { \
+ .name = _name, \
+ .flags = CLK_SET_RATE_PARENT, \
+ .max = JH71X0_CLK_INVERT, \
+ .parents = { [0] = _parent }, \
+}
+
+struct jh71x0_clk {
+ struct clk_hw hw;
+ unsigned int idx;
+ unsigned int max_div;
+};
+
+struct jh71x0_clk_priv {
+ /* protect clk enable and set rate/parent from happening at the same time */
+ spinlock_t rmw_lock;
+ struct device *dev;
+ void __iomem *base;
+ struct clk_hw *pll[3];
+ struct jh71x0_clk reg[];
+};
+
+const struct clk_ops *starfive_jh71x0_clk_ops(u32 max);
+
+#endif