mirror of https://gitee.com/openkylin/linux.git
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright 2013 Emilio López
|
|
*
|
|
* Emilio López <emilio@elopez.com.ar>
|
|
*/
|
|
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/slab.h>
|
|
|
|
#define SUNXI_OSC24M_GATE 0
|
|
|
|
static DEFINE_SPINLOCK(hosc_lock);
|
|
|
|
static void __init sun4i_osc_clk_setup(struct device_node *node)
|
|
{
|
|
struct clk *clk;
|
|
struct clk_fixed_rate *fixed;
|
|
struct clk_gate *gate;
|
|
const char *clk_name = node->name;
|
|
u32 rate;
|
|
|
|
if (of_property_read_u32(node, "clock-frequency", &rate))
|
|
return;
|
|
|
|
/* allocate fixed-rate and gate clock structs */
|
|
fixed = kzalloc(sizeof(struct clk_fixed_rate), GFP_KERNEL);
|
|
if (!fixed)
|
|
return;
|
|
gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL);
|
|
if (!gate)
|
|
goto err_free_fixed;
|
|
|
|
of_property_read_string(node, "clock-output-names", &clk_name);
|
|
|
|
/* set up gate and fixed rate properties */
|
|
gate->reg = of_iomap(node, 0);
|
|
gate->bit_idx = SUNXI_OSC24M_GATE;
|
|
gate->lock = &hosc_lock;
|
|
fixed->fixed_rate = rate;
|
|
|
|
clk = clk_register_composite(NULL, clk_name,
|
|
NULL, 0,
|
|
NULL, NULL,
|
|
&fixed->hw, &clk_fixed_rate_ops,
|
|
&gate->hw, &clk_gate_ops, 0);
|
|
|
|
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_fixed:
|
|
kfree(fixed);
|
|
}
|
|
CLK_OF_DECLARE(sun4i_osc, "allwinner,sun4i-a10-osc-clk", sun4i_osc_clk_setup);
|