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119 lines
3.2 KiB
119 lines
3.2 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Samsung Exynos SoC series Display Port PHY driver |
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* |
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* Copyright (C) 2013 Samsung Electronics Co., Ltd. |
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* Author: Jingoo Han <[email protected]> |
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*/ |
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#include <linux/err.h> |
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#include <linux/io.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/mfd/syscon.h> |
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#include <linux/of.h> |
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#include <linux/of_address.h> |
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#include <linux/of_device.h> |
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#include <linux/phy/phy.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/soc/samsung/exynos-regs-pmu.h> |
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struct exynos_dp_video_phy_drvdata { |
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u32 phy_ctrl_offset; |
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}; |
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struct exynos_dp_video_phy { |
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struct regmap *regs; |
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const struct exynos_dp_video_phy_drvdata *drvdata; |
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}; |
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static int exynos_dp_video_phy_power_on(struct phy *phy) |
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{ |
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struct exynos_dp_video_phy *state = phy_get_drvdata(phy); |
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/* Disable power isolation on DP-PHY */ |
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return regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset, |
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EXYNOS4_PHY_ENABLE, EXYNOS4_PHY_ENABLE); |
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} |
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static int exynos_dp_video_phy_power_off(struct phy *phy) |
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{ |
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struct exynos_dp_video_phy *state = phy_get_drvdata(phy); |
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/* Enable power isolation on DP-PHY */ |
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return regmap_update_bits(state->regs, state->drvdata->phy_ctrl_offset, |
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EXYNOS4_PHY_ENABLE, 0); |
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} |
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static const struct phy_ops exynos_dp_video_phy_ops = { |
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.power_on = exynos_dp_video_phy_power_on, |
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.power_off = exynos_dp_video_phy_power_off, |
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.owner = THIS_MODULE, |
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}; |
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static const struct exynos_dp_video_phy_drvdata exynos5250_dp_video_phy = { |
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.phy_ctrl_offset = EXYNOS5_DPTX_PHY_CONTROL, |
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}; |
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static const struct exynos_dp_video_phy_drvdata exynos5420_dp_video_phy = { |
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.phy_ctrl_offset = EXYNOS5420_DPTX_PHY_CONTROL, |
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}; |
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static const struct of_device_id exynos_dp_video_phy_of_match[] = { |
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{ |
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.compatible = "samsung,exynos5250-dp-video-phy", |
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.data = &exynos5250_dp_video_phy, |
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}, { |
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.compatible = "samsung,exynos5420-dp-video-phy", |
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.data = &exynos5420_dp_video_phy, |
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}, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(of, exynos_dp_video_phy_of_match); |
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static int exynos_dp_video_phy_probe(struct platform_device *pdev) |
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{ |
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struct exynos_dp_video_phy *state; |
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struct device *dev = &pdev->dev; |
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struct phy_provider *phy_provider; |
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struct phy *phy; |
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state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL); |
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if (!state) |
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return -ENOMEM; |
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state->regs = syscon_regmap_lookup_by_phandle(dev->of_node, |
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"samsung,pmu-syscon"); |
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if (IS_ERR(state->regs)) { |
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dev_err(dev, "Failed to lookup PMU regmap\n"); |
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return PTR_ERR(state->regs); |
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} |
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state->drvdata = of_device_get_match_data(dev); |
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phy = devm_phy_create(dev, NULL, &exynos_dp_video_phy_ops); |
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if (IS_ERR(phy)) { |
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dev_err(dev, "failed to create Display Port PHY\n"); |
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return PTR_ERR(phy); |
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} |
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phy_set_drvdata(phy, state); |
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phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); |
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return PTR_ERR_OR_ZERO(phy_provider); |
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} |
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static struct platform_driver exynos_dp_video_phy_driver = { |
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.probe = exynos_dp_video_phy_probe, |
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.driver = { |
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.name = "exynos-dp-video-phy", |
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.of_match_table = exynos_dp_video_phy_of_match, |
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.suppress_bind_attrs = true, |
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} |
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}; |
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module_platform_driver(exynos_dp_video_phy_driver); |
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MODULE_AUTHOR("Jingoo Han <[email protected]>"); |
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MODULE_DESCRIPTION("Samsung Exynos SoC DP PHY driver"); |
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MODULE_LICENSE("GPL v2");
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