xref: /openbmc/linux/drivers/clk/davinci/psc.h (revision c3848db3)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Clock driver for TI Davinci PSC controllers
4  *
5  * Copyright (C) 2018 David Lechner <david@lechnology.com>
6  */
7 
8 #ifndef __CLK_DAVINCI_PSC_H__
9 #define __CLK_DAVINCI_PSC_H__
10 
11 #include <linux/clk-provider.h>
12 #include <linux/types.h>
13 
14 /* PSC quirk flags */
15 #define LPSC_ALWAYS_ENABLED	BIT(0) /* never disable this clock */
16 #define LPSC_SET_RATE_PARENT	BIT(1) /* propagate set_rate to parent clock */
17 #define LPSC_FORCE		BIT(2) /* requires MDCTL FORCE bit */
18 #define LPSC_LOCAL_RESET	BIT(3) /* acts as reset provider */
19 
20 struct davinci_lpsc_clkdev_info {
21 	const char *con_id;
22 	const char *dev_id;
23 };
24 
25 #define LPSC_CLKDEV(c, d) {	\
26 	.con_id = (c),		\
27 	.dev_id = (d)		\
28 }
29 
30 #define LPSC_CLKDEV1(n, c, d) \
31 static const struct davinci_lpsc_clkdev_info n[] __initconst = {	\
32 	LPSC_CLKDEV((c), (d)),						\
33 	{ }								\
34 }
35 
36 #define LPSC_CLKDEV2(n, c1, d1, c2, d2) \
37 static const struct davinci_lpsc_clkdev_info n[] __initconst = {	\
38 	LPSC_CLKDEV((c1), (d1)),					\
39 	LPSC_CLKDEV((c2), (d2)),					\
40 	{ }								\
41 }
42 
43 #define LPSC_CLKDEV3(n, c1, d1, c2, d2, c3, d3) \
44 static const struct davinci_lpsc_clkdev_info n[] __initconst = {	\
45 	LPSC_CLKDEV((c1), (d1)),					\
46 	LPSC_CLKDEV((c2), (d2)),					\
47 	LPSC_CLKDEV((c3), (d3)),					\
48 	{ }								\
49 }
50 
51 /**
52  * davinci_lpsc_clk_info - LPSC module-specific clock information
53  * @name: the clock name
54  * @parent: the parent clock name
55  * @cdevs: optional array of clkdev lookup table info
56  * @md: the local module domain (LPSC id)
57  * @pd: the power domain id
58  * @flags: bitmask of LPSC_* flags
59  */
60 struct davinci_lpsc_clk_info {
61 	const char *name;
62 	const char *parent;
63 	const struct davinci_lpsc_clkdev_info *cdevs;
64 	u32 md;
65 	u32 pd;
66 	unsigned long flags;
67 };
68 
69 #define LPSC(m, d, n, p, c, f)	\
70 {				\
71 	.name	= #n,		\
72 	.parent	= #p,		\
73 	.cdevs	= (c),		\
74 	.md	= (m),		\
75 	.pd	= (d),		\
76 	.flags	= (f),		\
77 }
78 
79 int davinci_psc_register_clocks(struct device *dev,
80 				const struct davinci_lpsc_clk_info *info,
81 				u8 num_clks,
82 				void __iomem *base);
83 
84 int of_davinci_psc_clk_init(struct device *dev,
85 			    const struct davinci_lpsc_clk_info *info,
86 			    u8 num_clks,
87 			    void __iomem *base);
88 
89 /* Device-specific data */
90 
91 struct davinci_psc_init_data {
92 	struct clk_bulk_data *parent_clks;
93 	int num_parent_clks;
94 	int (*psc_init)(struct device *dev, void __iomem *base);
95 };
96 
97 #ifdef CONFIG_ARCH_DAVINCI_DA830
98 extern const struct davinci_psc_init_data da830_psc0_init_data;
99 extern const struct davinci_psc_init_data da830_psc1_init_data;
100 #endif
101 #ifdef CONFIG_ARCH_DAVINCI_DA850
102 extern const struct davinci_psc_init_data da850_psc0_init_data;
103 extern const struct davinci_psc_init_data da850_psc1_init_data;
104 extern const struct davinci_psc_init_data of_da850_psc0_init_data;
105 extern const struct davinci_psc_init_data of_da850_psc1_init_data;
106 #endif
107 #endif /* __CLK_DAVINCI_PSC_H__ */
108