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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
*/
#include "dsi_phy.h"
#include "dsi_pll.h"
/*
* DSI PLL Helper functions
*/
long msm_dsi_pll_helper_clk_round_rate(struct clk_hw *hw,
unsigned long rate, unsigned long *parent_rate)
{
struct msm_dsi_pll *pll = hw_clk_to_pll(hw);
if (rate < pll->cfg->min_pll_rate)
return pll->cfg->min_pll_rate;
else if (rate > pll->cfg->max_pll_rate)
return pll->cfg->max_pll_rate;
else
return rate;
}
int msm_dsi_pll_helper_clk_prepare(struct clk_hw *hw)
{
struct msm_dsi_pll *pll = hw_clk_to_pll(hw);
int ret = 0;
/*
* Certain PLLs do not allow VCO rate update when it is on.
* Keep track of their status to turn on/off after set rate success.
*/
if (unlikely(pll->pll_on))
return 0;
ret = pll->cfg->pll_ops.enable_seq(pll);
if (ret) {
DRM_ERROR("DSI PLL failed to lock\n");
return ret;
}
pll->pll_on = true;
return 0;
}
void msm_dsi_pll_helper_clk_unprepare(struct clk_hw *hw)
{
struct msm_dsi_pll *pll = hw_clk_to_pll(hw);
if (unlikely(!pll->pll_on))
return;
pll->cfg->pll_ops.disable_seq(pll);
pll->pll_on = false;
}
void msm_dsi_pll_helper_unregister_clks(struct clk **clks, u32 num_clks)
{
if (!num_clks || !clks)
return;
do {
clk_unregister(clks[--num_clks]);
clks[num_clks] = NULL;
} while (num_clks);
}
/*
* DSI PLL API
*/
void msm_dsi_pll_destroy(struct msm_dsi_pll *pll)
{
if (pll->cfg->pll_ops.destroy)
pll->cfg->pll_ops.destroy(pll);
}
void msm_dsi_pll_save_state(struct msm_dsi_pll *pll)
{
if (pll->cfg->pll_ops.save_state) {
pll->cfg->pll_ops.save_state(pll);
pll->state_saved = true;
}
}
int msm_dsi_pll_restore_state(struct msm_dsi_pll *pll)
{
int ret;
if (pll->cfg->pll_ops.restore_state && pll->state_saved) {
ret = pll->cfg->pll_ops.restore_state(pll);
if (ret)
return ret;
pll->state_saved = false;
}
return 0;
}
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