mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
1.6 KiB
73 lines
1.6 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* Copyright 2013 Emilio López |
|
* |
|
* Emilio López <[email protected]> |
|
*/ |
|
|
|
#include <linux/clk-provider.h> |
|
#include <linux/io.h> |
|
#include <linux/of.h> |
|
#include <linux/of_address.h> |
|
#include <linux/slab.h> |
|
|
|
static DEFINE_SPINLOCK(mod1_lock); |
|
|
|
#define SUN4I_MOD1_ENABLE 31 |
|
#define SUN4I_MOD1_MUX 16 |
|
#define SUN4I_MOD1_MUX_WIDTH 2 |
|
#define SUN4I_MOD1_MAX_PARENTS 4 |
|
|
|
static void __init sun4i_mod1_clk_setup(struct device_node *node) |
|
{ |
|
struct clk *clk; |
|
struct clk_mux *mux; |
|
struct clk_gate *gate; |
|
const char *parents[4]; |
|
const char *clk_name = node->name; |
|
void __iomem *reg; |
|
int i; |
|
|
|
reg = of_io_request_and_map(node, 0, of_node_full_name(node)); |
|
if (IS_ERR(reg)) |
|
return; |
|
|
|
mux = kzalloc(sizeof(*mux), GFP_KERNEL); |
|
if (!mux) |
|
goto err_unmap; |
|
|
|
gate = kzalloc(sizeof(*gate), GFP_KERNEL); |
|
if (!gate) |
|
goto err_free_mux; |
|
|
|
of_property_read_string(node, "clock-output-names", &clk_name); |
|
i = of_clk_parent_fill(node, parents, SUN4I_MOD1_MAX_PARENTS); |
|
|
|
gate->reg = reg; |
|
gate->bit_idx = SUN4I_MOD1_ENABLE; |
|
gate->lock = &mod1_lock; |
|
mux->reg = reg; |
|
mux->shift = SUN4I_MOD1_MUX; |
|
mux->mask = BIT(SUN4I_MOD1_MUX_WIDTH) - 1; |
|
mux->lock = &mod1_lock; |
|
|
|
clk = clk_register_composite(NULL, clk_name, parents, i, |
|
&mux->hw, &clk_mux_ops, |
|
NULL, NULL, |
|
&gate->hw, &clk_gate_ops, CLK_SET_RATE_PARENT); |
|
if (IS_ERR(clk)) |
|
goto err_free_gate; |
|
|
|
of_clk_add_provider(node, of_clk_src_simple_get, clk); |
|
|
|
return; |
|
|
|
err_free_gate: |
|
kfree(gate); |
|
err_free_mux: |
|
kfree(mux); |
|
err_unmap: |
|
iounmap(reg); |
|
} |
|
CLK_OF_DECLARE(sun4i_mod1, "allwinner,sun4i-a10-mod1-clk", |
|
sun4i_mod1_clk_setup);
|
|
|