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/*
* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __DSI_PLL_H__
#define __DSI_PLL_H__
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include "dsi.h"
#define NUM_DSI_CLOCKS_MAX 6
#define MAX_DSI_PLL_EN_SEQS 10
struct msm_dsi_pll {
enum msm_dsi_phy_type type;
struct clk_hw clk_hw;
bool pll_on;
bool state_saved;
unsigned long min_rate;
unsigned long max_rate;
u32 en_seq_cnt;
int (*enable_seqs[MAX_DSI_PLL_EN_SEQS])(struct msm_dsi_pll *pll);
void (*disable_seq)(struct msm_dsi_pll *pll);
int (*get_provider)(struct msm_dsi_pll *pll,
struct clk **byte_clk_provider,
struct clk **pixel_clk_provider);
void (*destroy)(struct msm_dsi_pll *pll);
void (*save_state)(struct msm_dsi_pll *pll);
int (*restore_state)(struct msm_dsi_pll *pll);
};
#define hw_clk_to_pll(x) container_of(x, struct msm_dsi_pll, clk_hw)
static inline void pll_write(void __iomem *reg, u32 data)
{
msm_writel(data, reg);
}
static inline u32 pll_read(const void __iomem *reg)
{
return msm_readl(reg);
}
static inline void pll_write_udelay(void __iomem *reg, u32 data, u32 delay_us)
{
pll_write(reg, data);
udelay(delay_us);
}
static inline void pll_write_ndelay(void __iomem *reg, u32 data, u32 delay_ns)
{
pll_write((reg), data);
ndelay(delay_ns);
}
/*
* DSI PLL Helper functions
*/
/* clock callbacks */
long msm_dsi_pll_helper_clk_round_rate(struct clk_hw *hw,
unsigned long rate, unsigned long *parent_rate);
int msm_dsi_pll_helper_clk_prepare(struct clk_hw *hw);
void msm_dsi_pll_helper_clk_unprepare(struct clk_hw *hw);
/* misc */
void msm_dsi_pll_helper_unregister_clks(struct platform_device *pdev,
struct clk **clks, u32 num_clks);
/*
* Initialization for Each PLL Type
*/
#ifdef CONFIG_DRM_MSM_DSI_28NM_PHY
struct msm_dsi_pll *msm_dsi_pll_28nm_init(struct platform_device *pdev,
enum msm_dsi_phy_type type, int id);
#else
static inline struct msm_dsi_pll *msm_dsi_pll_28nm_init(
struct platform_device *pdev, enum msm_dsi_phy_type type, int id)
{
return ERR_PTR(-ENODEV);
}
#endif
#endif /* __DSI_PLL_H__ */
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