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-rw-r--r--drivers/clk/pxa/clk-pxa.h162
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/clk/pxa/clk-pxa.h b/drivers/clk/pxa/clk-pxa.h
new file mode 100644
index 000000000..7ec2d2821
--- /dev/null
+++ b/drivers/clk/pxa/clk-pxa.h
@@ -0,0 +1,162 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Marvell PXA family clocks
+ *
+ * Copyright (C) 2014 Robert Jarzmik
+ *
+ * Common clock code for PXA clocks ("CKEN" type clocks + DT)
+ */
+#ifndef _CLK_PXA_
+#define _CLK_PXA_
+
+#define CLKCFG_TURBO 0x1
+#define CLKCFG_FCS 0x2
+#define CLKCFG_HALFTURBO 0x4
+#define CLKCFG_FASTBUS 0x8
+
+#define PARENTS(name) \
+ static const char *const name ## _parents[] __initconst
+#define MUX_RO_RATE_RO_OPS(name, clk_name) \
+ static struct clk_hw name ## _mux_hw; \
+ static struct clk_hw name ## _rate_hw; \
+ static const struct clk_ops name ## _mux_ops = { \
+ .get_parent = name ## _get_parent, \
+ .set_parent = dummy_clk_set_parent, \
+ }; \
+ static const struct clk_ops name ## _rate_ops = { \
+ .recalc_rate = name ## _get_rate, \
+ }; \
+ static struct clk * __init clk_register_ ## name(void) \
+ { \
+ return clk_register_composite(NULL, clk_name, \
+ name ## _parents, \
+ ARRAY_SIZE(name ## _parents), \
+ &name ## _mux_hw, &name ## _mux_ops, \
+ &name ## _rate_hw, &name ## _rate_ops, \
+ NULL, NULL, CLK_GET_RATE_NOCACHE); \
+ }
+
+#define RATE_RO_OPS(name, clk_name) \
+ static struct clk_hw name ## _rate_hw; \
+ static const struct clk_ops name ## _rate_ops = { \
+ .recalc_rate = name ## _get_rate, \
+ }; \
+ static struct clk * __init clk_register_ ## name(void) \
+ { \
+ return clk_register_composite(NULL, clk_name, \
+ name ## _parents, \
+ ARRAY_SIZE(name ## _parents), \
+ NULL, NULL, \
+ &name ## _rate_hw, &name ## _rate_ops, \
+ NULL, NULL, CLK_GET_RATE_NOCACHE); \
+ }
+
+#define RATE_OPS(name, clk_name) \
+ static struct clk_hw name ## _rate_hw; \
+ static const struct clk_ops name ## _rate_ops = { \
+ .recalc_rate = name ## _get_rate, \
+ .set_rate = name ## _set_rate, \
+ .determine_rate = name ## _determine_rate, \
+ }; \
+ static struct clk * __init clk_register_ ## name(void) \
+ { \
+ return clk_register_composite(NULL, clk_name, \
+ name ## _parents, \
+ ARRAY_SIZE(name ## _parents), \
+ NULL, NULL, \
+ &name ## _rate_hw, &name ## _rate_ops, \
+ NULL, NULL, CLK_GET_RATE_NOCACHE); \
+ }
+
+#define MUX_OPS(name, clk_name, flags) \
+ static struct clk_hw name ## _mux_hw; \
+ static const struct clk_ops name ## _mux_ops = { \
+ .get_parent = name ## _get_parent, \
+ .set_parent = name ## _set_parent, \
+ .determine_rate = name ## _determine_rate, \
+ }; \
+ static struct clk * __init clk_register_ ## name(void) \
+ { \
+ return clk_register_composite(NULL, clk_name, \
+ name ## _parents, \
+ ARRAY_SIZE(name ## _parents), \
+ &name ## _mux_hw, &name ## _mux_ops, \
+ NULL, NULL, \
+ NULL, NULL, \
+ CLK_GET_RATE_NOCACHE | flags); \
+ }
+
+/*
+ * CKEN clock type
+ * This clock takes it source from 2 possible parents :
+ * - a low power parent
+ * - a normal parent
+ *
+ * +------------+ +-----------+
+ * | Low Power | --- | x mult_lp |
+ * | Clock | | / div_lp |\
+ * +------------+ +-----------+ \+-----+ +-----------+
+ * | Mux |---| CKEN gate |
+ * +------------+ +-----------+ /+-----+ +-----------+
+ * | High Power | | x mult_hp |/
+ * | Clock | --- | / div_hp |
+ * +------------+ +-----------+
+ */
+struct desc_clk_cken {
+ struct clk_hw hw;
+ int ckid;
+ int cken_reg;
+ const char *name;
+ const char *dev_id;
+ const char *con_id;
+ const char * const *parent_names;
+ struct clk_fixed_factor lp;
+ struct clk_fixed_factor hp;
+ struct clk_gate gate;
+ bool (*is_in_low_power)(void);
+ const unsigned long flags;
+};
+
+#define PXA_CKEN(_dev_id, _con_id, _name, parents, _mult_lp, _div_lp, \
+ _mult_hp, _div_hp, is_lp, _cken_reg, _cken_bit, flag) \
+ { .ckid = CLK_ ## _name, .name = #_name, \
+ .cken_reg = _cken_reg, \
+ .dev_id = _dev_id, .con_id = _con_id, .parent_names = parents,\
+ .lp = { .mult = _mult_lp, .div = _div_lp }, \
+ .hp = { .mult = _mult_hp, .div = _div_hp }, \
+ .is_in_low_power = is_lp, \
+ .gate = { .bit_idx = _cken_bit }, \
+ .flags = flag, \
+ }
+#define PXA_CKEN_1RATE(dev_id, con_id, name, parents, cken_reg, \
+ cken_bit, flag) \
+ PXA_CKEN(dev_id, con_id, name, parents, 1, 1, 1, 1, \
+ NULL, cken_reg, cken_bit, flag)
+
+struct pxa2xx_freq {
+ unsigned long cpll;
+ unsigned int membus_khz;
+ unsigned int cccr;
+ unsigned int div2;
+ unsigned int clkcfg;
+};
+
+static inline int dummy_clk_set_parent(struct clk_hw *hw, u8 index)
+{
+ return 0;
+}
+
+extern void clkdev_pxa_register(int ckid, const char *con_id,
+ const char *dev_id, struct clk *clk);
+extern int clk_pxa_cken_init(const struct desc_clk_cken *clks,
+ int nb_clks, void __iomem *clk_regs);
+void clk_pxa_dt_common_init(struct device_node *np);
+
+void pxa2xx_core_turbo_switch(bool on);
+void pxa2xx_cpll_change(struct pxa2xx_freq *freq,
+ u32 (*mdrefr_dri)(unsigned int),
+ void __iomem *cccr);
+int pxa2xx_determine_rate(struct clk_rate_request *req,
+ struct pxa2xx_freq *freqs, int nb_freqs);
+
+#endif