75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2018 Synopsys, Inc. All rights reserved.
|
|
* Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
|
|
*/
|
|
|
|
#include <clk.h>
|
|
#include <dm/device.h>
|
|
|
|
#include "clk-lib.h"
|
|
|
|
#define HZ_IN_MHZ 1000000
|
|
#define ceil(x, y) ({ ulong __x = (x), __y = (y); (__x + __y - 1) / __y; })
|
|
|
|
int soc_clk_ctl(const char *name, ulong *rate, enum clk_ctl_ops ctl)
|
|
{
|
|
int ret;
|
|
ulong mhz_rate, priv_rate;
|
|
struct clk clk;
|
|
|
|
/* Dummy fmeas device, just to be able to use standard clk_* api */
|
|
struct udevice fmeas = {
|
|
.name = "clk-fmeas",
|
|
.node = ofnode_path("/clk-fmeas"),
|
|
};
|
|
|
|
ret = clk_get_by_name(&fmeas, name, &clk);
|
|
if (ret) {
|
|
pr_err("clock '%s' not found, err=%d\n", name, ret);
|
|
return ret;
|
|
}
|
|
|
|
if (ctl & CLK_ON) {
|
|
ret = clk_enable(&clk);
|
|
if (ret && ret != -ENOSYS && ret != -ENOTSUPP)
|
|
return ret;
|
|
}
|
|
|
|
if ((ctl & CLK_SET) && rate) {
|
|
priv_rate = ctl & CLK_MHZ ? (*rate) * HZ_IN_MHZ : *rate;
|
|
ret = clk_set_rate(&clk, priv_rate);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (ctl & CLK_OFF) {
|
|
ret = clk_disable(&clk);
|
|
if (ret) {
|
|
pr_err("clock '%s' can't be disabled, err=%d\n", name, ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
priv_rate = clk_get_rate(&clk);
|
|
|
|
clk_free(&clk);
|
|
|
|
mhz_rate = ceil(priv_rate, HZ_IN_MHZ);
|
|
|
|
if (ctl & CLK_MHZ)
|
|
priv_rate = mhz_rate;
|
|
|
|
if ((ctl & CLK_GET) && rate)
|
|
*rate = priv_rate;
|
|
|
|
if ((ctl & CLK_PRINT) && (ctl & CLK_MHZ))
|
|
printf("HSDK: clock '%s' rate %lu MHz\n", name, priv_rate);
|
|
else if (ctl & CLK_PRINT)
|
|
printf("HSDK: clock '%s' rate %lu Hz\n", name, priv_rate);
|
|
else
|
|
debug("HSDK: clock '%s' rate %lu MHz\n", name, mhz_rate);
|
|
|
|
return 0;
|
|
}
|