61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
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/*
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* Copyright (c) 2017 NVIDIA CORPORATION. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef _LINUX_I2C_RTCPU_CLK_CONFIG_H
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#define _LINUX_I2C_RTCPU_CLK_CONFIG_H
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/* Define speed modes */
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#define I2C_STANDARD_MODE 100000
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#define I2C_FAST_MODE 400000
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#define I2C_FAST_MODE_PLUS 1000000
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#define I2C_HS_MODE 3500000
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#define I2C_CLK_DIVISOR 0x06c
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#define I2C_CLK_DIVISOR_STD_FAST_MODE_SHIFT 16
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#define I2C_CLK_MULTIPLIER_STD_FAST_MODE 8
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#define I2C_CLK_DIVISOR_HS_MODE_MASK 0xFFFF
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#define I2C_INTERFACE_TIMING_0 0x94
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#define I2C_TLOW_MASK 0x3F
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#define I2C_THIGH_SHIFT 8
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#define I2C_THIGH_MASK (0x3F << I2C_THIGH_SHIFT)
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#define I2C_HS_INTERFACE_TIMING 0x9c
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#define I2C_HS_TLOW_MASK 0x3F
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#define I2C_HS_THIGH_SHIFT 8
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#define I2C_HS_THIGH_MASK (0x3F << I2C_THIGH_SHIFT)
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/*
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* I2C control data structure
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*/
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struct tegra_i2c_clk_config {
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struct clk *div_clk;
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struct clk *slow_clk;
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struct reset_control *rst;
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void __iomem *base;
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u32 bus_clk_rate;
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bool is_clkon_always;
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u16 clk_divisor_non_hs_mode;
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u32 low_clock_count;
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u32 high_clock_count;
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u32 hs_low_clock_count;
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u32 hs_high_clock_count;
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int clk_divisor_hs_mode;
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};
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int tegra_i2c_rtcpu_clock_enable(struct tegra_i2c_clk_config *i2c_config);
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void tegra_i2c_rtcpu_clock_disable(struct tegra_i2c_clk_config *i2c_config);
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int tegra_i2c_rtcpu_clock_init(struct tegra_i2c_clk_config *i2c_config);
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#endif /* _LINUX_I2C_RTCPU_CLK_CONFIG_H */
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