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| 1 | +// SPDX-License-Identifier: GPL-2.0-only |
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1 | 2 | /* |
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2 | 3 | * Rockchip DP PHY driver |
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3 | 4 | * |
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4 | 5 | * Copyright (C) 2016 FuZhou Rockchip Co., Ltd. |
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5 | 6 | * Author: Yakir Yang <ykk@@rock-chips.com> |
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6 | | - * |
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7 | | - * This program is free software; you can redistribute it and/or modify |
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8 | | - * it under the terms of the GNU General Public License as published by |
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9 | | - * the Free Software Foundation; either version 2 of the License. |
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10 | 7 | */ |
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11 | 8 | |
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12 | 9 | #include <linux/clk.h> |
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13 | | -#include <linux/clk-provider.h> |
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14 | 10 | #include <linux/mfd/syscon.h> |
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15 | 11 | #include <linux/module.h> |
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16 | 12 | #include <linux/of.h> |
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17 | | -#include <linux/of_device.h> |
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18 | 13 | #include <linux/phy/phy.h> |
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19 | 14 | #include <linux/platform_device.h> |
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20 | 15 | #include <linux/regmap.h> |
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21 | | -#include <linux/reset.h> |
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22 | 16 | |
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23 | | -struct rockchip_dp_phy_data { |
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24 | | - u32 grf_reg_offset; |
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25 | | - u8 ref_clk_sel_shift; |
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26 | | - u8 iddq_shift; |
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27 | | -}; |
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| 17 | +#define GRF_SOC_CON12 0x0274 |
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| 18 | + |
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| 19 | +#define GRF_EDP_REF_CLK_SEL_INTER_HIWORD_MASK BIT(20) |
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| 20 | +#define GRF_EDP_REF_CLK_SEL_INTER BIT(4) |
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| 21 | + |
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| 22 | +#define GRF_EDP_PHY_SIDDQ_HIWORD_MASK BIT(21) |
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| 23 | +#define GRF_EDP_PHY_SIDDQ_ON 0 |
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| 24 | +#define GRF_EDP_PHY_SIDDQ_OFF BIT(5) |
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28 | 25 | |
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29 | 26 | struct rockchip_dp_phy { |
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30 | 27 | struct device *dev; |
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31 | 28 | struct regmap *grf; |
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32 | 29 | struct clk *phy_24m; |
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33 | | - struct reset_control *rst; |
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34 | | - const struct rockchip_dp_phy_data *data; |
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35 | 30 | }; |
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| 31 | + |
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| 32 | +static int rockchip_set_phy_state(struct phy *phy, bool enable) |
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| 33 | +{ |
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| 34 | + struct rockchip_dp_phy *dp = phy_get_drvdata(phy); |
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| 35 | + int ret; |
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| 36 | + |
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| 37 | + if (enable) { |
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| 38 | + ret = regmap_write(dp->grf, GRF_SOC_CON12, |
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| 39 | + GRF_EDP_PHY_SIDDQ_HIWORD_MASK | |
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| 40 | + GRF_EDP_PHY_SIDDQ_ON); |
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| 41 | + if (ret < 0) { |
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| 42 | + dev_err(dp->dev, "Can't enable PHY power %d\n", ret); |
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| 43 | + return ret; |
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| 44 | + } |
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| 45 | + |
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| 46 | + ret = clk_prepare_enable(dp->phy_24m); |
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| 47 | + } else { |
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| 48 | + clk_disable_unprepare(dp->phy_24m); |
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| 49 | + |
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| 50 | + ret = regmap_write(dp->grf, GRF_SOC_CON12, |
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| 51 | + GRF_EDP_PHY_SIDDQ_HIWORD_MASK | |
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| 52 | + GRF_EDP_PHY_SIDDQ_OFF); |
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| 53 | + } |
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| 54 | + |
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| 55 | + return ret; |
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| 56 | +} |
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36 | 57 | |
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37 | 58 | static int rockchip_dp_phy_power_on(struct phy *phy) |
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38 | 59 | { |
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39 | | - struct rockchip_dp_phy *dp = phy_get_drvdata(phy); |
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40 | | - const struct rockchip_dp_phy_data *data = dp->data; |
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41 | | - |
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42 | | - if (!__clk_is_enabled(dp->phy_24m)) |
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43 | | - clk_prepare_enable(dp->phy_24m); |
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44 | | - |
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45 | | - if (dp->rst) { |
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46 | | - /* EDP 24m clock domain software reset */ |
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47 | | - reset_control_assert(dp->rst); |
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48 | | - usleep_range(20, 40); |
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49 | | - reset_control_deassert(dp->rst); |
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50 | | - } |
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51 | | - |
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52 | | - regmap_write(dp->grf, data->grf_reg_offset, |
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53 | | - 0 | BIT(16 + data->iddq_shift)); |
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54 | | - |
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55 | | - return 0; |
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| 60 | + return rockchip_set_phy_state(phy, true); |
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56 | 61 | } |
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57 | 62 | |
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58 | 63 | static int rockchip_dp_phy_power_off(struct phy *phy) |
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59 | 64 | { |
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60 | | - struct rockchip_dp_phy *dp = phy_get_drvdata(phy); |
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61 | | - const struct rockchip_dp_phy_data *data = dp->data; |
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62 | | - |
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63 | | - regmap_write(dp->grf, data->grf_reg_offset, |
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64 | | - BIT(data->iddq_shift) | BIT(16 + data->iddq_shift)); |
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65 | | - |
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66 | | - if (__clk_is_enabled(dp->phy_24m)) |
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67 | | - clk_disable_unprepare(dp->phy_24m); |
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68 | | - |
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69 | | - return 0; |
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| 65 | + return rockchip_set_phy_state(phy, false); |
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70 | 66 | } |
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71 | 67 | |
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72 | 68 | static const struct phy_ops rockchip_dp_phy_ops = { |
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.. | .. |
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81 | 77 | struct device_node *np = dev->of_node; |
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82 | 78 | struct phy_provider *phy_provider; |
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83 | 79 | struct rockchip_dp_phy *dp; |
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84 | | - const struct rockchip_dp_phy_data *data = of_device_get_match_data(dev); |
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85 | 80 | struct phy *phy; |
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86 | 81 | int ret; |
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87 | 82 | |
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.. | .. |
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96 | 91 | return -ENOMEM; |
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97 | 92 | |
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98 | 93 | dp->dev = dev; |
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99 | | - dp->data = data; |
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100 | 94 | |
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101 | 95 | dp->phy_24m = devm_clk_get(dev, "24m"); |
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102 | 96 | if (IS_ERR(dp->phy_24m)) { |
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.. | .. |
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110 | 104 | return ret; |
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111 | 105 | } |
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112 | 106 | |
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113 | | - ret = clk_prepare_enable(dp->phy_24m); |
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114 | | - if (ret) { |
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115 | | - dev_err(dev, "failed to enable phy 24m clock: %d\n", ret); |
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116 | | - return ret; |
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117 | | - } |
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118 | | - |
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119 | | - dp->rst = devm_reset_control_get_optional(dev, "edp_24m"); |
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120 | | - if (IS_ERR(dp->rst)) { |
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121 | | - ret = PTR_ERR(dp->rst); |
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122 | | - dev_err(dev, "failed to get reset control: %d\n", ret); |
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123 | | - return ret; |
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124 | | - } |
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125 | | - |
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126 | 107 | dp->grf = syscon_node_to_regmap(dev->parent->of_node); |
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127 | 108 | if (IS_ERR(dp->grf)) { |
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128 | 109 | dev_err(dev, "rk3288-dp needs the General Register Files syscon\n"); |
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129 | 110 | return PTR_ERR(dp->grf); |
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130 | 111 | } |
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131 | 112 | |
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132 | | - /* eDP PHY reference clock source from internal clock */ |
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133 | | - ret = regmap_write(dp->grf, data->grf_reg_offset, |
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134 | | - BIT(data->ref_clk_sel_shift) | |
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135 | | - BIT(16 + data->ref_clk_sel_shift)); |
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136 | | - if (ret) { |
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| 113 | + ret = regmap_write(dp->grf, GRF_SOC_CON12, GRF_EDP_REF_CLK_SEL_INTER | |
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| 114 | + GRF_EDP_REF_CLK_SEL_INTER_HIWORD_MASK); |
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| 115 | + if (ret != 0) { |
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137 | 116 | dev_err(dp->dev, "Could not config GRF edp ref clk: %d\n", ret); |
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138 | 117 | return ret; |
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139 | 118 | } |
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.. | .. |
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150 | 129 | return PTR_ERR_OR_ZERO(phy_provider); |
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151 | 130 | } |
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152 | 131 | |
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153 | | -static const struct rockchip_dp_phy_data rk3288_dp_phy_data = { |
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154 | | - .grf_reg_offset = 0x274, |
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155 | | - .ref_clk_sel_shift = 4, |
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156 | | - .iddq_shift = 5, |
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157 | | -}; |
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158 | | - |
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159 | | -static const struct rockchip_dp_phy_data rk3368_dp_phy_data = { |
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160 | | - .grf_reg_offset = 0x410, |
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161 | | - .ref_clk_sel_shift = 0, |
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162 | | - .iddq_shift = 1, |
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163 | | -}; |
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164 | | - |
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165 | 132 | static const struct of_device_id rockchip_dp_phy_dt_ids[] = { |
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166 | | - { .compatible = "rockchip,rk3288-dp-phy", .data = &rk3288_dp_phy_data }, |
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167 | | - { .compatible = "rockchip,rk3368-dp-phy", .data = &rk3368_dp_phy_data }, |
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| 133 | + { .compatible = "rockchip,rk3288-dp-phy" }, |
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168 | 134 | {} |
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169 | 135 | }; |
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170 | 136 | |
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