Contributors: 14
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jens Kuske |
429 |
83.14% |
1 |
5.26% |
| Maxime Ripard |
30 |
5.81% |
4 |
21.05% |
| Chen-Yu Tsai |
15 |
2.91% |
1 |
5.26% |
| Emilio López |
15 |
2.91% |
3 |
15.79% |
| Andrzej Hajda |
6 |
1.16% |
1 |
5.26% |
| Vishnu Patekar |
5 |
0.97% |
1 |
5.26% |
| Rob Herring |
3 |
0.58% |
1 |
5.26% |
| Stephen Boyd |
3 |
0.58% |
1 |
5.26% |
| Michael Turquette |
3 |
0.58% |
1 |
5.26% |
| Thomas Gleixner |
2 |
0.39% |
1 |
5.26% |
| Sebastian Hesselbarth |
2 |
0.39% |
1 |
5.26% |
| Dan Carpenter |
1 |
0.19% |
1 |
5.26% |
| Prashant Gaikwad |
1 |
0.19% |
1 |
5.26% |
| Arnd Bergmann |
1 |
0.19% |
1 |
5.26% |
| Total |
516 |
|
19 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2015 Jens Kuske <jenskuske@gmail.com>
*
* Based on clk-simple-gates.c, which is:
* Copyright 2015 Maxime Ripard
*
* Maxime Ripard <maxime.ripard@free-electrons.com>
*/
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
static DEFINE_SPINLOCK(gates_lock);
static void __init sun8i_h3_bus_gates_init(struct device_node *node)
{
static const char * const names[] = { "ahb1", "ahb2", "apb1", "apb2" };
enum { AHB1, AHB2, APB1, APB2, PARENT_MAX } clk_parent;
const char *parents[PARENT_MAX];
struct clk_onecell_data *clk_data;
const char *clk_name;
struct property *prop;
struct resource res;
void __iomem *clk_reg;
void __iomem *reg;
const __be32 *p;
int number, i;
u8 clk_bit;
int index;
reg = of_io_request_and_map(node, 0, of_node_full_name(node));
if (IS_ERR(reg))
return;
for (i = 0; i < ARRAY_SIZE(names); i++) {
int idx = of_property_match_string(node, "clock-names",
names[i]);
if (idx < 0)
return;
parents[i] = of_clk_get_parent_name(node, idx);
}
clk_data = kmalloc(sizeof(struct clk_onecell_data), GFP_KERNEL);
if (!clk_data)
goto err_unmap;
number = of_property_count_u32_elems(node, "clock-indices");
of_property_read_u32_index(node, "clock-indices", number - 1, &number);
clk_data->clks = kcalloc(number + 1, sizeof(struct clk *), GFP_KERNEL);
if (!clk_data->clks)
goto err_free_data;
i = 0;
of_property_for_each_u32(node, "clock-indices", prop, p, index) {
of_property_read_string_index(node, "clock-output-names",
i, &clk_name);
if (index == 17 || (index >= 29 && index <= 31))
clk_parent = AHB2;
else if (index <= 63 || index >= 128)
clk_parent = AHB1;
else if (index >= 64 && index <= 95)
clk_parent = APB1;
else if (index >= 96 && index <= 127)
clk_parent = APB2;
else {
WARN_ON(true);
continue;
}
clk_reg = reg + 4 * (index / 32);
clk_bit = index % 32;
clk_data->clks[index] = clk_register_gate(NULL, clk_name,
parents[clk_parent],
0, clk_reg, clk_bit,
0, &gates_lock);
i++;
if (IS_ERR(clk_data->clks[index])) {
WARN_ON(true);
continue;
}
}
clk_data->clk_num = number + 1;
of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
return;
err_free_data:
kfree(clk_data);
err_unmap:
iounmap(reg);
of_address_to_resource(node, 0, &res);
release_mem_region(res.start, resource_size(&res));
}
CLK_OF_DECLARE(sun8i_h3_bus_gates, "allwinner,sun8i-h3-bus-gates-clk",
sun8i_h3_bus_gates_init);
CLK_OF_DECLARE(sun8i_a83t_bus_gates, "allwinner,sun8i-a83t-bus-gates-clk",
sun8i_h3_bus_gates_init);