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-rw-r--r--drivers/clk/Makefile1
-rw-r--r--drivers/clk/pxa/Makefile1
-rw-r--r--drivers/clk/pxa/clk-pxa.c97
-rw-r--r--drivers/clk/pxa/clk-pxa.h107
-rw-r--r--include/dt-bindings/clock/pxa-clock.h77
5 files changed, 283 insertions, 0 deletions
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index f537a0b1f798..7891e4edaa07 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -48,6 +48,7 @@ obj-$(CONFIG_ARCH_MMP) += mmp/
48endif 48endif
49obj-$(CONFIG_PLAT_ORION) += mvebu/ 49obj-$(CONFIG_PLAT_ORION) += mvebu/
50obj-$(CONFIG_ARCH_MXS) += mxs/ 50obj-$(CONFIG_ARCH_MXS) += mxs/
51obj-$(CONFIG_ARCH_PXA) += pxa/
51obj-$(CONFIG_COMMON_CLK_QCOM) += qcom/ 52obj-$(CONFIG_COMMON_CLK_QCOM) += qcom/
52obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/ 53obj-$(CONFIG_ARCH_ROCKCHIP) += rockchip/
53obj-$(CONFIG_COMMON_CLK_SAMSUNG) += samsung/ 54obj-$(CONFIG_COMMON_CLK_SAMSUNG) += samsung/
diff --git a/drivers/clk/pxa/Makefile b/drivers/clk/pxa/Makefile
new file mode 100644
index 000000000000..cb2bd8ff53da
--- /dev/null
+++ b/drivers/clk/pxa/Makefile
@@ -0,0 +1 @@
obj-y += clk-pxa.o
diff --git a/drivers/clk/pxa/clk-pxa.c b/drivers/clk/pxa/clk-pxa.c
new file mode 100644
index 000000000000..ef3c05389c0a
--- /dev/null
+++ b/drivers/clk/pxa/clk-pxa.c
@@ -0,0 +1,97 @@
1/*
2 * Marvell PXA family clocks
3 *
4 * Copyright (C) 2014 Robert Jarzmik
5 *
6 * Common clock code for PXA clocks ("CKEN" type clocks + DT)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 */
13#include <linux/clk.h>
14#include <linux/clk-provider.h>
15#include <linux/clkdev.h>
16#include <linux/of.h>
17
18#include <dt-bindings/clock/pxa-clock.h>
19#include "clk-pxa.h"
20
21DEFINE_SPINLOCK(lock);
22
23static struct clk *pxa_clocks[CLK_MAX];
24static struct clk_onecell_data onecell_data = {
25 .clks = pxa_clocks,
26 .clk_num = CLK_MAX,
27};
28
29#define to_pxa_clk(_hw) container_of(_hw, struct pxa_clk_cken, hw)
30
31static unsigned long cken_recalc_rate(struct clk_hw *hw,
32 unsigned long parent_rate)
33{
34 struct pxa_clk_cken *pclk = to_pxa_clk(hw);
35 struct clk_fixed_factor *fix;
36
37 if (!pclk->is_in_low_power || pclk->is_in_low_power())
38 fix = &pclk->lp;
39 else
40 fix = &pclk->hp;
41 fix->hw.clk = hw->clk;
42 return clk_fixed_factor_ops.recalc_rate(&fix->hw, parent_rate);
43}
44
45static struct clk_ops cken_rate_ops = {
46 .recalc_rate = cken_recalc_rate,
47};
48
49static u8 cken_get_parent(struct clk_hw *hw)
50{
51 struct pxa_clk_cken *pclk = to_pxa_clk(hw);
52
53 if (!pclk->is_in_low_power)
54 return 0;
55 return pclk->is_in_low_power() ? 0 : 1;
56}
57
58static struct clk_ops cken_mux_ops = {
59 .get_parent = cken_get_parent,
60 .set_parent = dummy_clk_set_parent,
61};
62
63void __init clkdev_pxa_register(int ckid, const char *con_id,
64 const char *dev_id, struct clk *clk)
65{
66 if (!IS_ERR(clk) && (ckid != CLK_NONE))
67 pxa_clocks[ckid] = clk;
68 if (!IS_ERR(clk))
69 clk_register_clkdev(clk, con_id, dev_id);
70}
71
72int __init clk_pxa_cken_init(struct pxa_clk_cken *clks, int nb_clks)
73{
74 int i;
75 struct pxa_clk_cken *pclk;
76 struct clk *clk;
77
78 for (i = 0; i < nb_clks; i++) {
79 pclk = clks + i;
80 pclk->gate.lock = &lock;
81 clk = clk_register_composite(NULL, pclk->name,
82 pclk->parent_names, 2,
83 &pclk->hw, &cken_mux_ops,
84 &pclk->hw, &cken_rate_ops,
85 &pclk->gate.hw, &clk_gate_ops,
86 pclk->flags);
87 clkdev_pxa_register(pclk->ckid, pclk->con_id, pclk->dev_id,
88 clk);
89 }
90 return 0;
91}
92
93static void __init pxa_dt_clocks_init(struct device_node *np)
94{
95 of_clk_add_provider(np, of_clk_src_onecell_get, &onecell_data);
96}
97CLK_OF_DECLARE(pxa_clks, "marvell,pxa-clocks", pxa_dt_clocks_init);
diff --git a/drivers/clk/pxa/clk-pxa.h b/drivers/clk/pxa/clk-pxa.h
new file mode 100644
index 000000000000..5fe219d06b49
--- /dev/null
+++ b/drivers/clk/pxa/clk-pxa.h
@@ -0,0 +1,107 @@
1/*
2 * Marvell PXA family clocks
3 *
4 * Copyright (C) 2014 Robert Jarzmik
5 *
6 * Common clock code for PXA clocks ("CKEN" type clocks + DT)
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 */
13#ifndef _CLK_PXA_
14#define _CLK_PXA_
15
16#define PARENTS(name) \
17 static const char *name ## _parents[] __initconst
18#define MUX_RO_RATE_RO_OPS(name, clk_name) \
19 static struct clk_hw name ## _mux_hw; \
20 static struct clk_hw name ## _rate_hw; \
21 static struct clk_ops name ## _mux_ops = { \
22 .get_parent = name ## _get_parent, \
23 .set_parent = dummy_clk_set_parent, \
24 }; \
25 static struct clk_ops name ## _rate_ops = { \
26 .recalc_rate = name ## _get_rate, \
27 }; \
28 static struct clk *clk_register_ ## name(void) \
29 { \
30 return clk_register_composite(NULL, clk_name, \
31 name ## _parents, \
32 ARRAY_SIZE(name ## _parents), \
33 &name ## _mux_hw, &name ## _mux_ops, \
34 &name ## _rate_hw, &name ## _rate_ops, \
35 NULL, NULL, CLK_GET_RATE_NOCACHE); \
36 }
37
38#define RATE_RO_OPS(name, clk_name) \
39 static struct clk_hw name ## _rate_hw; \
40 static struct clk_ops name ## _rate_ops = { \
41 .recalc_rate = name ## _get_rate, \
42 }; \
43 static struct clk *clk_register_ ## name(void) \
44 { \
45 return clk_register_composite(NULL, clk_name, \
46 name ## _parents, \
47 ARRAY_SIZE(name ## _parents), \
48 NULL, NULL, \
49 &name ## _rate_hw, &name ## _rate_ops, \
50 NULL, NULL, CLK_GET_RATE_NOCACHE); \
51 }
52
53/*
54 * CKEN clock type
55 * This clock takes it source from 2 possible parents :
56 * - a low power parent
57 * - a normal parent
58 *
59 * +------------+ +-----------+
60 * | Low Power | --- | x mult_lp |
61 * | Clock | | / div_lp |\
62 * +------------+ +-----------+ \+-----+ +-----------+
63 * | Mux |---| CKEN gate |
64 * +------------+ +-----------+ /+-----+ +-----------+
65 * | High Power | | x mult_hp |/
66 * | Clock | --- | / div_hp |
67 * +------------+ +-----------+
68 */
69struct pxa_clk_cken {
70 struct clk_hw hw;
71 int ckid;
72 const char *name;
73 const char *dev_id;
74 const char *con_id;
75 const char **parent_names;
76 struct clk_fixed_factor lp;
77 struct clk_fixed_factor hp;
78 struct clk_gate gate;
79 bool (*is_in_low_power)(void);
80 const unsigned long flags;
81};
82
83