2 * Copyright (C) 2016 NVIDIA CORPORATION, All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 #include <linux/module.h>
17 #include <linux/clk.h>
18 #include <linux/of_device.h>
19 #include <linux/of_irq.h>
20 #include <linux/irqchip/arm-gic.h>
21 #include <linux/platform_device.h>
22 #include <linux/pm_clock.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
27 unsigned int num_clocks
;
28 const char *const *clocks
;
31 static int gic_runtime_resume(struct device
*dev
)
33 struct gic_chip_data
*gic
= dev_get_drvdata(dev
);
36 ret
= pm_clk_resume(dev
);
41 * On the very first resume, the pointer to the driver data
42 * will be NULL and this is intentional, because we do not
43 * want to restore the GIC on the very first resume. So if
44 * the pointer is not valid just return.
49 gic_dist_restore(gic
);
55 static int gic_runtime_suspend(struct device
*dev
)
57 struct gic_chip_data
*gic
= dev_get_drvdata(dev
);
62 return pm_clk_suspend(dev
);
65 static int gic_get_clocks(struct device
*dev
, const struct gic_clk_data
*data
)
74 ret
= pm_clk_create(dev
);
78 for (i
= 0; i
< data
->num_clocks
; i
++) {
79 clk
= of_clk_get_by_name(dev
->of_node
, data
->clocks
[i
]);
81 dev_err(dev
, "failed to get clock %s\n",
87 ret
= pm_clk_add_clk(dev
, clk
);
89 dev_err(dev
, "failed to add clock at index %d\n", i
);
103 static int gic_probe(struct platform_device
*pdev
)
105 struct device
*dev
= &pdev
->dev
;
106 const struct gic_clk_data
*data
;
107 struct gic_chip_data
*gic
;
110 data
= of_device_get_match_data(&pdev
->dev
);
112 dev_err(&pdev
->dev
, "no device match found\n");
116 irq
= irq_of_parse_and_map(dev
->of_node
, 0);
118 dev_err(dev
, "no parent interrupt found!\n");
122 ret
= gic_get_clocks(dev
, data
);
126 pm_runtime_enable(dev
);
128 ret
= pm_runtime_get_sync(dev
);
132 ret
= gic_of_init_child(dev
, &gic
, irq
);
136 platform_set_drvdata(pdev
, gic
);
140 dev_info(dev
, "GIC IRQ controller registered\n");
145 pm_runtime_put_sync(dev
);
147 pm_runtime_disable(dev
);
150 irq_dispose_mapping(irq
);
155 static const struct dev_pm_ops gic_pm_ops
= {
156 SET_RUNTIME_PM_OPS(gic_runtime_suspend
,
157 gic_runtime_resume
, NULL
)
160 static const char * const gic400_clocks
[] = {
164 static const struct gic_clk_data gic400_data
= {
165 .num_clocks
= ARRAY_SIZE(gic400_clocks
),
166 .clocks
= gic400_clocks
,
169 static const struct of_device_id gic_match
[] = {
170 { .compatible
= "nvidia,tegra210-agic", .data
= &gic400_data
},
173 MODULE_DEVICE_TABLE(of
, gic_match
);
175 static struct platform_driver gic_driver
= {
179 .of_match_table
= gic_match
,
184 builtin_platform_driver(gic_driver
);