tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge branch 'clk-meson-gxbb-ao' into clk-next
* clk-meson-gxbb-ao:
clk: meson: Add GXBB AO Clock and Reset controller driver
dt-bindings: clock: reset: Add GXBB AO Clock and Reset Bindings
+369
-1
+45
Documentation/devicetree/bindings/clock/amlogic,gxbb-aoclkc.txt
+45
Documentation/devicetree/bindings/clock/amlogic,gxbb-aoclkc.txt
···
1
+
* Amlogic GXBB AO Clock and Reset Unit
2
+
3
+
The Amlogic GXBB AO clock controller generates and supplies clock to various
4
+
controllers within the Always-On part of the SoC.
5
+
6
+
Required Properties:
7
+
8
+
- compatible: should be "amlogic,gxbb-aoclkc"
9
+
- reg: physical base address of the clock controller and length of memory
10
+
mapped region.
11
+
12
+
- #clock-cells: should be 1.
13
+
14
+
Each clock is assigned an identifier and client nodes can use this identifier
15
+
to specify the clock which they consume. All available clocks are defined as
16
+
preprocessor macros in the dt-bindings/clock/gxbb-aoclkc.h header and can be
17
+
used in device tree sources.
18
+
19
+
- #reset-cells: should be 1.
20
+
21
+
Each reset is assigned an identifier and client nodes can use this identifier
22
+
to specify the reset which they consume. All available resets are defined as
23
+
preprocessor macros in the dt-bindings/reset/gxbb-aoclkc.h header and can be
24
+
used in device tree sources.
25
+
26
+
Example: AO Clock controller node:
27
+
28
+
clkc_AO: clock-controller@040 {
29
+
compatible = "amlogic,gxbb-aoclkc";
30
+
reg = <0x0 0x040 0x0 0x4>;
31
+
#clock-cells = <1>;
32
+
#reset-cells = <1>;
33
+
};
34
+
35
+
Example: UART controller node that consumes the clock and reset generated
36
+
by the clock controller:
37
+
38
+
uart_AO: serial@4c0 {
39
+
compatible = "amlogic,meson-uart";
40
+
reg = <0x4c0 0x14>;
41
+
interrupts = <0 90 1>;
42
+
clocks = <&clkc_AO CLKID_AO_UART1>;
43
+
resets = <&clkc_AO RESET_AO_UART1>;
44
+
status = "disabled";
45
+
};
+1
-1
drivers/clk/meson/Makefile
+1
-1
drivers/clk/meson/Makefile
+191
drivers/clk/meson/gxbb-aoclk.c
+191
drivers/clk/meson/gxbb-aoclk.c
···
1
+
/*
2
+
* This file is provided under a dual BSD/GPLv2 license. When using or
3
+
* redistributing this file, you may do so under either license.
4
+
*
5
+
* GPL LICENSE SUMMARY
6
+
*
7
+
* Copyright (c) 2016 BayLibre, SAS.
8
+
* Author: Neil Armstrong <narmstrong@baylibre.com>
9
+
*
10
+
* This program is free software; you can redistribute it and/or modify
11
+
* it under the terms of version 2 of the GNU General Public License as
12
+
* published by the Free Software Foundation.
13
+
*
14
+
* This program is distributed in the hope that it will be useful, but
15
+
* WITHOUT ANY WARRANTY; without even the implied warranty of
16
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17
+
* General Public License for more details.
18
+
*
19
+
* You should have received a copy of the GNU General Public License
20
+
* along with this program; if not, see <http://www.gnu.org/licenses/>.
21
+
* The full GNU General Public License is included in this distribution
22
+
* in the file called COPYING.
23
+
*
24
+
* BSD LICENSE
25
+
*
26
+
* Copyright (c) 2016 BayLibre, SAS.
27
+
* Author: Neil Armstrong <narmstrong@baylibre.com>
28
+
*
29
+
* Redistribution and use in source and binary forms, with or without
30
+
* modification, are permitted provided that the following conditions
31
+
* are met:
32
+
*
33
+
* * Redistributions of source code must retain the above copyright
34
+
* notice, this list of conditions and the following disclaimer.
35
+
* * Redistributions in binary form must reproduce the above copyright
36
+
* notice, this list of conditions and the following disclaimer in
37
+
* the documentation and/or other materials provided with the
38
+
* distribution.
39
+
* * Neither the name of Intel Corporation nor the names of its
40
+
* contributors may be used to endorse or promote products derived
41
+
* from this software without specific prior written permission.
42
+
*
43
+
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44
+
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45
+
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46
+
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47
+
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48
+
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49
+
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50
+
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51
+
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52
+
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53
+
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54
+
*/
55
+
#include <linux/clk-provider.h>
56
+
#include <linux/of_address.h>
57
+
#include <linux/platform_device.h>
58
+
#include <linux/reset-controller.h>
59
+
#include <linux/init.h>
60
+
#include <dt-bindings/clock/gxbb-aoclkc.h>
61
+
#include <dt-bindings/reset/gxbb-aoclkc.h>
62
+
63
+
static DEFINE_SPINLOCK(gxbb_aoclk_lock);
64
+
65
+
struct gxbb_aoclk_reset_controller {
66
+
struct reset_controller_dev reset;
67
+
unsigned int *data;
68
+
void __iomem *base;
69
+
};
70
+
71
+
static int gxbb_aoclk_do_reset(struct reset_controller_dev *rcdev,
72
+
unsigned long id)
73
+
{
74
+
struct gxbb_aoclk_reset_controller *reset =
75
+
container_of(rcdev, struct gxbb_aoclk_reset_controller, reset);
76
+
77
+
writel(BIT(reset->data[id]), reset->base);
78
+
79
+
return 0;
80
+
}
81
+
82
+
static const struct reset_control_ops gxbb_aoclk_reset_ops = {
83
+
.reset = gxbb_aoclk_do_reset,
84
+
};
85
+
86
+
#define GXBB_AO_GATE(_name, _bit) \
87
+
static struct clk_gate _name##_ao = { \
88
+
.reg = (void __iomem *)0, \
89
+
.bit_idx = (_bit), \
90
+
.lock = &gxbb_aoclk_lock, \
91
+
.hw.init = &(struct clk_init_data) { \
92
+
.name = #_name "_ao", \
93
+
.ops = &clk_gate_ops, \
94
+
.parent_names = (const char *[]){ "clk81" }, \
95
+
.num_parents = 1, \
96
+
.flags = (CLK_SET_RATE_PARENT | CLK_IGNORE_UNUSED), \
97
+
}, \
98
+
}
99
+
100
+
GXBB_AO_GATE(remote, 0);
101
+
GXBB_AO_GATE(i2c_master, 1);
102
+
GXBB_AO_GATE(i2c_slave, 2);
103
+
GXBB_AO_GATE(uart1, 3);
104
+
GXBB_AO_GATE(uart2, 5);
105
+
GXBB_AO_GATE(ir_blaster, 6);
106
+
107
+
static unsigned int gxbb_aoclk_reset[] = {
108
+
[RESET_AO_REMOTE] = 16,
109
+
[RESET_AO_I2C_MASTER] = 18,
110
+
[RESET_AO_I2C_SLAVE] = 19,
111
+
[RESET_AO_UART1] = 17,
112
+
[RESET_AO_UART2] = 22,
113
+
[RESET_AO_IR_BLASTER] = 23,
114
+
};
115
+
116
+
static struct clk_gate *gxbb_aoclk_gate[] = {
117
+
[CLKID_AO_REMOTE] = &remote_ao,
118
+
[CLKID_AO_I2C_MASTER] = &i2c_master_ao,
119
+
[CLKID_AO_I2C_SLAVE] = &i2c_slave_ao,
120
+
[CLKID_AO_UART1] = &uart1_ao,
121
+
[CLKID_AO_UART2] = &uart2_ao,
122
+
[CLKID_AO_IR_BLASTER] = &ir_blaster_ao,
123
+
};
124
+
125
+
static struct clk_hw_onecell_data gxbb_aoclk_onecell_data = {
126
+
.hws = {
127
+
[CLKID_AO_REMOTE] = &remote_ao.hw,
128
+
[CLKID_AO_I2C_MASTER] = &i2c_master_ao.hw,
129
+
[CLKID_AO_I2C_SLAVE] = &i2c_slave_ao.hw,
130
+
[CLKID_AO_UART1] = &uart1_ao.hw,
131
+
[CLKID_AO_UART2] = &uart2_ao.hw,
132
+
[CLKID_AO_IR_BLASTER] = &ir_blaster_ao.hw,
133
+
},
134
+
.num = ARRAY_SIZE(gxbb_aoclk_gate),
135
+
};
136
+
137
+
static int gxbb_aoclkc_probe(struct platform_device *pdev)
138
+
{
139
+
struct resource *res;
140
+
void __iomem *base;
141
+
int ret, clkid;
142
+
struct device *dev = &pdev->dev;
143
+
struct gxbb_aoclk_reset_controller *rstc;
144
+
145
+
rstc = devm_kzalloc(dev, sizeof(rstc), GFP_KERNEL);
146
+
if (!rstc)
147
+
return -ENOMEM;
148
+
149
+
/* Generic clocks */
150
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
151
+
base = devm_ioremap_resource(dev, res);
152
+
if (IS_ERR(base))
153
+
return PTR_ERR(base);
154
+
155
+
/* Reset Controller */
156
+
rstc->base = base;
157
+
rstc->data = gxbb_aoclk_reset;
158
+
rstc->reset.ops = &gxbb_aoclk_reset_ops;
159
+
rstc->reset.nr_resets = ARRAY_SIZE(gxbb_aoclk_reset);
160
+
rstc->reset.of_node = dev->of_node;
161
+
ret = devm_reset_controller_register(dev, &rstc->reset);
162
+
163
+
/*
164
+
* Populate base address and register all clks
165
+
*/
166
+
for (clkid = 0; clkid < gxbb_aoclk_onecell_data.num; clkid++) {
167
+
gxbb_aoclk_gate[clkid]->reg = base;
168
+
169
+
ret = devm_clk_hw_register(dev,
170
+
gxbb_aoclk_onecell_data.hws[clkid]);
171
+
if (ret)
172
+
return ret;
173
+
}
174
+
175
+
return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
176
+
&gxbb_aoclk_onecell_data);
177
+
}
178
+
179
+
static const struct of_device_id gxbb_aoclkc_match_table[] = {
180
+
{ .compatible = "amlogic,gxbb-aoclkc" },
181
+
{ }
182
+
};
183
+
184
+
static struct platform_driver gxbb_aoclkc_driver = {
185
+
.probe = gxbb_aoclkc_probe,
186
+
.driver = {
187
+
.name = "gxbb-aoclkc",
188
+
.of_match_table = gxbb_aoclkc_match_table,
189
+
},
190
+
};
191
+
builtin_platform_driver(gxbb_aoclkc_driver);
+66
include/dt-bindings/clock/gxbb-aoclkc.h
+66
include/dt-bindings/clock/gxbb-aoclkc.h
···
1
+
/*
2
+
* This file is provided under a dual BSD/GPLv2 license. When using or
3
+
* redistributing this file, you may do so under either license.
4
+
*
5
+
* GPL LICENSE SUMMARY
6
+
*
7
+
* Copyright (c) 2016 BayLibre, SAS.
8
+
* Author: Neil Armstrong <narmstrong@baylibre.com>
9
+
*
10
+
* This program is free software; you can redistribute it and/or modify
11
+
* it under the terms of version 2 of the GNU General Public License as
12
+
* published by the Free Software Foundation.
13
+
*
14
+
* This program is distributed in the hope that it will be useful, but
15
+
* WITHOUT ANY WARRANTY; without even the implied warranty of
16
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17
+
* General Public License for more details.
18
+
*
19
+
* You should have received a copy of the GNU General Public License
20
+
* along with this program; if not, see <http://www.gnu.org/licenses/>.
21
+
* The full GNU General Public License is included in this distribution
22
+
* in the file called COPYING.
23
+
*
24
+
* BSD LICENSE
25
+
*
26
+
* Copyright (c) 2016 BayLibre, SAS.
27
+
* Author: Neil Armstrong <narmstrong@baylibre.com>
28
+
*
29
+
* Redistribution and use in source and binary forms, with or without
30
+
* modification, are permitted provided that the following conditions
31
+
* are met:
32
+
*
33
+
* * Redistributions of source code must retain the above copyright
34
+
* notice, this list of conditions and the following disclaimer.
35
+
* * Redistributions in binary form must reproduce the above copyright
36
+
* notice, this list of conditions and the following disclaimer in
37
+
* the documentation and/or other materials provided with the
38
+
* distribution.
39
+
* * Neither the name of Intel Corporation nor the names of its
40
+
* contributors may be used to endorse or promote products derived
41
+
* from this software without specific prior written permission.
42
+
*
43
+
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44
+
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45
+
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46
+
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47
+
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48
+
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49
+
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50
+
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51
+
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52
+
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53
+
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54
+
*/
55
+
56
+
#ifndef DT_BINDINGS_CLOCK_AMLOGIC_MESON_GXBB_AOCLK
57
+
#define DT_BINDINGS_CLOCK_AMLOGIC_MESON_GXBB_AOCLK
58
+
59
+
#define CLKID_AO_REMOTE 0
60
+
#define CLKID_AO_I2C_MASTER 1
61
+
#define CLKID_AO_I2C_SLAVE 2
62
+
#define CLKID_AO_UART1 3
63
+
#define CLKID_AO_UART2 4
64
+
#define CLKID_AO_IR_BLASTER 5
65
+
66
+
#endif
+66
include/dt-bindings/reset/gxbb-aoclkc.h
+66
include/dt-bindings/reset/gxbb-aoclkc.h
···
1
+
/*
2
+
* This file is provided under a dual BSD/GPLv2 license. When using or
3
+
* redistributing this file, you may do so under either license.
4
+
*
5
+
* GPL LICENSE SUMMARY
6
+
*
7
+
* Copyright (c) 2016 BayLibre, SAS.
8
+
* Author: Neil Armstrong <narmstrong@baylibre.com>
9
+
*
10
+
* This program is free software; you can redistribute it and/or modify
11
+
* it under the terms of version 2 of the GNU General Public License as
12
+
* published by the Free Software Foundation.
13
+
*
14
+
* This program is distributed in the hope that it will be useful, but
15
+
* WITHOUT ANY WARRANTY; without even the implied warranty of
16
+
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17
+
* General Public License for more details.
18
+
*
19
+
* You should have received a copy of the GNU General Public License
20
+
* along with this program; if not, see <http://www.gnu.org/licenses/>.
21
+
* The full GNU General Public License is included in this distribution
22
+
* in the file called COPYING.
23
+
*
24
+
* BSD LICENSE
25
+
*
26
+
* Copyright (c) 2016 BayLibre, SAS.
27
+
* Author: Neil Armstrong <narmstrong@baylibre.com>
28
+
*
29
+
* Redistribution and use in source and binary forms, with or without
30
+
* modification, are permitted provided that the following conditions
31
+
* are met:
32
+
*
33
+
* * Redistributions of source code must retain the above copyright
34
+
* notice, this list of conditions and the following disclaimer.
35
+
* * Redistributions in binary form must reproduce the above copyright
36
+
* notice, this list of conditions and the following disclaimer in
37
+
* the documentation and/or other materials provided with the
38
+
* distribution.
39
+
* * Neither the name of Intel Corporation nor the names of its
40
+
* contributors may be used to endorse or promote products derived
41
+
* from this software without specific prior written permission.
42
+
*
43
+
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
44
+
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
45
+
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
46
+
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
47
+
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48
+
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
49
+
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
50
+
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
51
+
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
52
+
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
53
+
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54
+
*/
55
+
56
+
#ifndef DT_BINDINGS_RESET_AMLOGIC_MESON_GXBB_AOCLK
57
+
#define DT_BINDINGS_RESET_AMLOGIC_MESON_GXBB_AOCLK
58
+
59
+
#define RESET_AO_REMOTE 0
60
+
#define RESET_AO_I2C_MASTER 1
61
+
#define RESET_AO_I2C_SLAVE 2
62
+
#define RESET_AO_UART1 3
63
+
#define RESET_AO_UART2 4
64
+
#define RESET_AO_IR_BLASTER 5
65
+
66
+
#endif