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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2012-2015, 2017-2018, The Linux Foundation.
* All rights reserved.
*/
#include <linux/clk.h>
#include <linux/clk/clk-conf.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <drm/drm_print.h>
#include "dp_clk_util.h"
void msm_dss_put_clk(struct dss_clk *clk_arry, int num_clk)
{
int i;
for (i = num_clk - 1; i >= 0; i--) {
if (clk_arry[i].clk)
clk_put(clk_arry[i].clk);
clk_arry[i].clk = NULL;
}
}
int msm_dss_get_clk(struct device *dev, struct dss_clk *clk_arry, int num_clk)
{
int i, rc = 0;
for (i = 0; i < num_clk; i++) {
clk_arry[i].clk = clk_get(dev, clk_arry[i].clk_name);
rc = PTR_ERR_OR_ZERO(clk_arry[i].clk);
if (rc) {
DEV_ERR("%pS->%s: '%s' get failed. rc=%d\n",
__builtin_return_address(0), __func__,
clk_arry[i].clk_name, rc);
goto error;
}
}
return rc;
error:
for (i--; i >= 0; i--) {
if (clk_arry[i].clk)
clk_put(clk_arry[i].clk);
clk_arry[i].clk = NULL;
}
return rc;
}
int msm_dss_clk_set_rate(struct dss_clk *clk_arry, int num_clk)
{
int i, rc = 0;
for (i = 0; i < num_clk; i++) {
if (clk_arry[i].clk) {
if (clk_arry[i].type != DSS_CLK_AHB) {
DEV_DBG("%pS->%s: '%s' rate %ld\n",
__builtin_return_address(0), __func__,
clk_arry[i].clk_name,
clk_arry[i].rate);
rc = clk_set_rate(clk_arry[i].clk,
clk_arry[i].rate);
if (rc) {
DEV_ERR("%pS->%s: %s failed. rc=%d\n",
__builtin_return_address(0),
__func__,
clk_arry[i].clk_name, rc);
break;
}
}
} else {
DEV_ERR("%pS->%s: '%s' is not available\n",
__builtin_return_address(0), __func__,
clk_arry[i].clk_name);
rc = -EPERM;
break;
}
}
return rc;
}
int msm_dss_enable_clk(struct dss_clk *clk_arry, int num_clk, int enable)
{
int i, rc = 0;
if (enable) {
for (i = 0; i < num_clk; i++) {
DEV_DBG("%pS->%s: enable '%s'\n",
__builtin_return_address(0), __func__,
clk_arry[i].clk_name);
rc = clk_prepare_enable(clk_arry[i].clk);
if (rc)
DEV_ERR("%pS->%s: %s en fail. rc=%d\n",
__builtin_return_address(0),
__func__,
clk_arry[i].clk_name, rc);
if (rc && i) {
msm_dss_enable_clk(&clk_arry[i - 1],
i - 1, false);
break;
}
}
} else {
for (i = num_clk - 1; i >= 0; i--) {
DEV_DBG("%pS->%s: disable '%s'\n",
__builtin_return_address(0), __func__,
clk_arry[i].clk_name);
clk_disable_unprepare(clk_arry[i].clk);
}
}
return rc;
}
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